Companies





192.com
192.com uses Cassandra to cache, analyze and index portions of the people-related Web.  Cassandra is also used as the database in a new Web People Search Engine
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Adform
Adform uses Cassandra to help power their digital advertising platform.
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Adku
Adku chose Apache Cassandra over HBase for the following reasons: Reliability, Performance, Availability, Consistency, Single Point of Failure, Hot Spot Problem, MapReduce, Simpler & Hackable, and for the community support.
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Adobe
Adobe uses Cassandra in Adobe® AudienceManager, a Digital Marketing Suite (DMS) product that consolidates, activates, and optimizes digitally addressable data from all sources.
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Aeris
Aeris Communications uses Cassandra for their scalable M2M (Machine to Machine) Application Platform.
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Agentis
Agentis Energy uses Cassandra to help with their energy management tools.
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aiMatch
aiMatch uses Cassandra as a backend for visitor storage.
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Apigee
Apigee Usergrid is a comprehensive platform stack for mobile and rich client applications running on top of Cassandra.
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Apixio
Apixio uses Cassandra for serving seach queries on medical records.
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Applifier
Applifier built a facebook style messenger which uses Cassandra as storage backend.
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AppScale
AppScale uses Cassandra as a backend for Google App Engine applications.
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Appssavvy
Appssavvy uses Cassandra extensively in their activity based advertising platform, adtivity, to drive their activity ad delivery engine, event and engagement tracking, advanced reporting and analytics, and future Big Data needs including search.
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Apptegic
Apptegic relies on Cassandra to help subscription businesses understand their customer engagement and respond to it.
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Arkivum
Arkivum uses Cassandra across multiple datacenters, clouds and customer sites to help build scalability and resilience into its assured archive service.
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Azul
Azul certifies Cassandra on the Zing JVM to ensure support for large heaps, high throughput and low-latency.  They also uses Cassandra for internal BI for sales and marketing analytics.
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Backupify
Backupify uses Cassandra for meta data storage around files and objects.
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Barracuda Networks
While best known for their security solutions, Barracuda Networks offers products across three areas of IT: Content Security, Networking and Application Delivery and Data Storage, Protection and Disaster Recovery.  The Baracuda Central Research Database is using Cassandra to battle the Zombies....
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Burt
Burt uses Cassandra in their software to help advertisers and agencies improve the efficiency and effect of online campaigns.
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Cake Solutions
Cake uses Cassandra for advanced cloud-based fraud detection including credit card and other financial transactions.
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CallFire
CallFire has created an API and Client for creating voice applications with the help of Cassandra.
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Canonical
We use Cassandra as the foundation of our error reporting system in the Ubuntu operating system. In the ten months it's been operational, we've processed over 3.4 million error reports.
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Citypath
Citypath uses Cassandra to hold information about attractions, reviews, users, etc. for their city attraction recommendation system.
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Clearspring
Clearspring uses Cassandra for their distributed counting system that keeps track of how many times a URL is shared and serves over 200M view requests daily, the primary system they use for distributed processing needs is the project Hydra.
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Cloudian
Cloudian uses Cassandra as a component in its HyperStore™ S3-compatible object storage system.
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Cloudkick
Cloudkick's (owned by Rackspace) primary use of Cassandra is for storing and monitoring data of different metrics, checked by the Rackspace system.
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CloudTalk
The CloudTalk Platform contains API’s for users to create messaging apps with Cassandra as it’s data-store.
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Comcast
Comcast's next generation cloud TV platform, their open sourcing of Amazon's Simple Notification Service (SNS) and Simple Queue Service (SQS) are built  on top of Cassandra for its multi-data-center availability, extreme scalability, and very low latency.
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Constant Contact
Constant Contact’s Social Media feature uses Cassandra and helped them deploy the app in 3 months for $250k, compared to 9 months for $2.5 million if they used a traditional RDBMS.
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Dachis Group
The Dachis Group built and maintain a storage and analytics engine with Cassandra and Hadoop.
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DataDog
Datadog uses Cassandra to store billions of Web and IT metrics every day.
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Datafiniti
Datafiniti is building a web search engine for structured data using Solandra
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Datagraph Inc.
Datagraph uses Cassandra to store input RDF datasets and output files.
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Demandforce
Demandforce uses Cassandra for real-time data analytics.
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Despegar
Despegar uses Cassandra to storage user sessions for its hotel booking site, and also as a persistent cache of flight itineraries.
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Digg
V4 of Digg is built 100% on Cassandra.

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Digital Reasoning
Synthesys application with potential scale to over a 400-node Cassandra database was rolled out in late 2010.  Incoming data is preprocessed by Hadoop and then added to the Cassandra repository on a continuous basis.
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Digital River
Digital River is running Cassandra on their Global E-Commerce products.
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Easou
Easou is using Cassandra in their mobile search engine product to store over 300 million images (300 TB of data), in Cassandra. Easou also uses Cassandra to handle 400 million inserts per day for user tracking information.
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eBay
eBay has Cassandra supporting multiple applications (Social Signals, Hunch, and many time series use cases) with clusters spanning several data centers.
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eBuddy
eBuddy is a Web and Mobile messenger that uses Cassandra for user discovery service, user data service, and as a persistent session store.
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Egnyte
Egnyte is using Cassandra with multiple data centers to help run their Cloud File Server solution.
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Embed.ly
Embed.ly uses Cassandra for their API and Pro services.
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Engine Yard
Engine Yard uses Apache Cassandra
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Enkata
Enkata uses Cassandra to serve desktop video recordings and store billions of desktop activity data points to support its Desktop Analytics, Performance and Contact Resolution products.
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Ericsson
The Ericsson Labs OAuth Authorization service is using Cassandra as their data backend.
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FanBridge
FanBridge’s web-based Fan Relationship Management (FRM) platform uses Cassandra as a back-end data-store.
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Fight My Monster
Fight My Monster uses Cassandra to avoid MySQL sharding process' and scale inexpensively.
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Finn.no
FINN.no uses Cassandra to run Norway’s largest marketplace.
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FlxOne
Cassandra enables FlxOne to power real-time visualizations of terabyte data sets.
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Formspring
Formspring uses Cassandra to count responses, as well as store Social Graph data (followers, following, blockers, blocking) for 26 Million accounts with 10 million responses a day.
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FriendFacts
Friend Facts’ Facebook app that ask questions based on friends’ profiles is running on Cassandra.
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Frugal Mechanic
Frugal Mechanic uses Cassandra to search through 2.5M auto parts, fitting over 250M car configurations, for over 100 retailers.
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Globant
Performing sentiment analysis on tweets to try to predict fluctuations in the stock options values. Cassandra provides scalability and excellent response time.
 
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GoDaddy
GoDaddy uses Cassandra for a number of applications.
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GoingOn
GoingOn uses Cassandra to scale out Communications with 25+ universities using a stream based communication model.
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GoTime
GoTime uses Cassandra as their primary data store for their Happy Hours website and mobile application.
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Gowalla
Gowalla uses Cassandra to store feeds/timelines for their Social Guide mobile application and website.
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Gridpoint
Gridpoint uses Cassandra with their internal API’s for their offerings of Energy Management products.
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GX Software
GX Software uses Cassandra for their Cross-Channel, Realtime Online Engagement platform BlueConic. BlueConic is used at 50+ customers on hundreds of websites globally, accumulating 100+ million profiles and 4+ billion interactions up till now (June 2013), all powered by Apache Cassandra and running ...
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Hailo
Cassandra is Hailo's primary storage engine for building globally distributed, resilient services. Hailo currently use it to store customer records, traffic events, SMS and emails history and detailed job history. More use cases are being added all the time....
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Health Market Science
Health Market Science (HMS) uses Cassandra for their healthcare data and analytics offerings.
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Healthline
Healthline uses Cassandra as part of their crawling and indexing infrastructure.
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Hobsons
Hobsons uses Cassandra to process log data as part of their educational application offerings.
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Houghton Mifflin Harcourt
Houghton Mifflin Harcourt is using Cassandra database to track usage, system errors.
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HP
HP stores playlists, play counts, favorites, and other content relating to online music streaming from computers and smartphones using Cassandra.
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HubSpot
HubSpot Marketing uses Cassandra to help with their all-in-one marketing software platform.
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IBM
IBM has created BlueRunner, a Browser-based email client with a Cassandra backend.
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IgnitionOne
IgnitionOne is a digital marketing solutions company providing world-class proprietary technology and expert services  to improve digital marketing performance. IgnitionOne’s integrated Digital Marketing Suite (DMS) helps marketers centralize, manage and optimize Digital Media, understand...
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Impetus
Impetus Big Data services include consulting, architecture, development, test and support around technologies like the complete Hadoop ecosystem, NoSQL, Real Time Data, Visualization, DBs including Cassandra, Mongo DB, Membase and a range of Commercial MPP products and ETL, BI/Analytics tools....
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Inkling
Inkling uses Cassandra to store usage patterns and activity streams for their interactive textbooks.
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Instagram
Instagram is a fun and quirky way to share your life with friends through a series of pictures. Snap a photo with your mobile phone, then choose a filter to transform the image into a memory to keep around forever. We're building Instagram to allow you to experience moments in your friends' lives th...
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Iovation
Iovation uses Cassandra in their fraud prevention service to identify users that abuse systems and for customers to retrieve that information.
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Isidorey
Isidorey is the creator of Cloudsandra: a multi-tenant platform built on Brisk.
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Jetpac
Jetpac uses Cassandra to index tens of millions of photos a day.
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Jumptap
Jumptap uses Cassandra to handle clickstream, converstion, demographic, and usage data.
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JustSignal
justSignal uses Cassandra to store raw data objects and edges.
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Lacuna Systems
Lacuna Systems uses Cassandra to store time series performance metrics from Application Delivery Controllers.
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Lease Eagle
Lease Eagle uses Cassandra in RAZEReports™, a customisable reporting engine that flattens hierarchical data structures, allowing users to select fields in an ad-hoc fashion and achieve query results within seconds across very large data sets.
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Librato
Librato is using Cassandra for their infrastructure SaaS offeringLibrato is using Cassandra for their infrastructure SaaS offering.
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Life Office
LiveOffice is using Lucandra/Solandra for text indexing in CassandraLiveOffice is using Lucandra/Solandra for text indexing in Cassandra.
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Lightt
Lightt is a visual timeline service that allows you to capture moments on your mobile device which are stored in an infinite visual timeline. Lightt uses Cassandra to store all of their online, live query data. Unlike other social services, Lightt gives users access to their entire timelines al...
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Live Person
LivePerson uses Cassandra with the LiveEngagePlatform for online activity data capture, behavioral analysis, and audience segmentation.
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Mahalo
Mahalo uses Cassandra to record user activity logs and topics for questions and answers.
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Marked Up
Marked Up uses Cassandra to power their desktop app analytics engine to provide developers with deep insights on how their apps are being used and bought on the Windows Store (with support for more platforms planned.) They rely heavily on counters but also use Hive and Solr to get the job done....
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MartiniMedia
We decided to go with Cassandra for these reasons: fast writes, P2P architecture (No Master/Slave) and built in cross data center support.
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Mate1.com
Mate1 is using Cassandra for their online dating website.
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Media6degrees
Media6degrees uses Cassandra to store vistor data, ad history, and id mapping.
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Medialets
Medialets uses Cassandra to process 100′s of 1000s of simultaneous requests per second for over 300,000,000 devices supported.
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MedProcure
MedProcure uses Cassandra to help provide software solutions for ordering and tacking medical supplies.
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Metabroadcast
MetaBroadcast uses Cassandra for storing and accessing metadata in the 4.0 version of Atlas, the global video & audio index.
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MetricsHub
MetricsHub uses Cassandra for recording time series information (e.g. metrics) as well as special events (e.g. server failure) for our customers. We have a multi-tenant Cassandra cluster for this. We record over 16 data points per server per second, 24 hours a day, 7 days a week. We use Cassand...
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Mollum
Mollum uses Cassandra to track reputations from IP data.
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Montis
Monitis provides Cassandra systems monitoring.
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Morningstar
• Morningstar uses Cassandra as a big data security aggregator from multiple sources using Morningstar global security identifier.
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Movile
With over 20 million users, Movile.com leverages Cassandra for their subscription management services.
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Napshare
Napshare uses Cassandra as the primary data store for their social bookmarking service.
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NAVTEQ
NAVTEQ uses Cassandra for storing user profiles, demographic information.
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Nearbuy
Nearbuy provides analytics to brick and mortar stores using Cassandra.
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Netflix

As Netflix moved into the cloud, we needed to find the appropriate mechanisms to persist and query data within our highly distributed infrastructure. Our goal is to build fast, fault tolerant systems at Internet scale. We realized that in order to achieve this goal, we needed to move beyond the cons...
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Next Big Sound
Next Big Sound uses Cassandra to keep track of the listening, discovery, and purchase decisions of music listeners.
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Nextag
Nextag is using Cassandra for their traffic acquisition platform.
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NextSlide
NextSlide.com uses Cassandra to help with analytics for their presentation sharing application.
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ngmoco
ngmoco stores user information (username, password, email) and gaming achievements (high scores, trophies) in Cassandra.
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Nice To Web You
Nice To Web You currently uses Apache Cassandra for storing their big data. They build social music games as Facebook applications, quizzes, events and the like. Their applications have a large Facebook following and can not use a traditional persistent layer such as MySQL or Oracle to handle this t...
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Nicira
Nicira Networks has created software that virtualizes the network and enables elastic, scale-out data centers with the help of Cassandra.
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nScaled
nScaled uses Cassandra to as a backbone for Cloud Archived File System hosted in their worldwide data centers.
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nToklo
nToklo is a scalable platform, running on Cassandra and Hadoop, that provides data analytics, personalised recommendations and social integration features for our online retail and digital media service partners.
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Odnoklassniki
Odnoklassniki uses Cassandra as their primary storage for of all Like! buttons, picture voting marks, and other critical services which are both write and read intensive systems.  They utilize multi-data center deployments of Cassandra nodes in clusters for high availability on data center fail...
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Onesite
Cassandra is in use at Onesite to help run their website platform services.
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Onespot
Onespot is running Cassandra to help with their link recommendation services.
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Ooyala
Ooyala built a scalable, flexible, real-time analytics engine using CassandraOoyala built a scalable, flexible, real-time analytics engine using Cassandra.
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OpenAdExchange
OpenAdExchange uses Cassandra for search-based advertising.
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Openfeint
Openfeint uses Cassandra as a real-time storage for gaming information such as trophies and achievements.
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OpenTracker
Opentracker uses Cassandra to store data collected by their web and app analytic solutions.  Cassandra enables Opentracker to measure/track an unlimited amount of users and events, and scale to high traffic websites and apps.
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OpenWave
Cassandra acts as a distributed database and serves as a distributed storage mechanism for Openwave’s next generation messaging platform.
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OpenX
OpenX is running over 130 nodes on Cassandra for their OpenX Enterprise product to store and replicate advertisements and targeting data for ad delivery.
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Other Inbox
Other Inbox uses Ruby and Cassandra for their QA system.
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Outbrain
Outbrain uses 20 algorithms to serve recommendations on more than 0.5 Billion page views/month.
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Page2RSS
Page2RSS is a service that uses Cassandra to helps monitor web sites that do not publish feeds.
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Palantir
Palantir uses Cassandra in their platforms for integrating, visualizing, and analyzing the world’s information.
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Pantheon
Pantheon manages the DNS/Cassandra layer to maintain full availability (read and write) during deployments and data center interlink failures.
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PBS Kids
PBS Kids is using Cassandra for educational purposes on PBSKIDS.org.
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PCPhase
PCPhase uses Cassandra to run a large mobile web site.  PCPhase is one of the first to use Cassandra in production in Japan.
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PeopleBrowser
Peoplebrowsr uses Cassandra to help store Social Media Data.
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Perfect World
Perfect World Entertainment uses Cassandra to store players’ rolling action and achievement data with user analysis applications running on top of it.
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Pitney Bowes
Pitney Bowes is developing a Cloud-based application using Cassandra.
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Platform46
Platform46 built an on-premise enterprise appliance which provides twitter-like, “open-follower”, short messaging services for internal corporate networks using Cassandra.
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Plaxo
Plaxo uses Cassandra to store contact information.  To give you a sense of the scale of our efforts, we’ve reviewed 3 billion contacts in Plaxo’s Cassandra database, compared them with publicly available data sources, and identified approximately 600 million unique people with ...
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Polyvore
Polyvore is a web-based application for mixing and matching products from any online store that uses Cassandra as its back-end data store.
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PostRank
View how Postrank uses Cassandra for their backend database.
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Press
Press+ uses Cassandra to help run their e-commerce solutions.
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Proofpoint
Proofpoint is using Cassandra to store historical archive data.
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QuantiFind
Quantifind uses Cassandra to help store data analytics.
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Quova
Quova is using Cassandra in the production of their geolocation data.
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Rakuten
Rakuten uses Cassandra to store user data, item information, and reviews for Japan’s largest Global Marketplace.
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Rally Software
Rally Software uses Cassandra to handle web sessions across multiple nodes.
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RAZORLabs
RAZORlabs uses Cassandra through a custom made API based on Hector and Java.  At RAZORlabs, Cassandra is used to maintain structures of user data, profiles, photos and company information.
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Real Networks
Real Networks used Cassandra to improve availability and performance while reducing costs to provide digital media.
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Recruiting.com
Recruiting.com provides next generation software and technology to help organizations succeed by recruiting and hiring the right people. Their technology solutions enable employers to find and effectively recruit talent through our cloud-based candidate management software and network of leadin...
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Reddit
Using Cassandra as a persistent cache and in the process of migrating other data-types from Postgres into Cassandra.
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Referentia
Referentia uses Cassandra in their network management product to capture time-series data.
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Reticker
Retickr pulls in news from the Internet and presents it to end users in a unified stream using Cassandra.  Retickr’s Cassandra cluster holds stories (RSS/Facebook/Twitter), icons and avatars associated with those stories, and user information (usernames, passwords, preferences).
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Rhapsody
Rhapsody uses Cassandra to handle very large scale data, such as users profile and play data.
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Right Scale Cloud Management
RightScale is a cloud management solution that uses Cassandra both for its internal operations as well as for enabling its customers to deploy either open source Cassandra clusters or DataStax Enterprise clusters on public and private clouds.
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RockMelt
RockMelt uses Cassandra for almost all of their persistent data needs in their Web Browser product.  
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RockYou
RockYou uses Cassandra to record every single click for 50 million Monthly Active Users in real-time for their online games.
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Ruckus Wireless
Ruckus Wireless is using Cassandra in their next generation wireless product.
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Scale Unlimited
Scale Unlimited uses Cassandra for a number of custom data processing solutions built for clients, including predictive analytics based on social media activity.
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Scoop.it
Scoop.it uses Cassandra for monitoring live analytics as well as archiving that data: time series data fits perfectly into Cassandra's data model. We're also using the software for asynchronous analytics: after heavy computation in a Hadoop stack, job results are stored into Cassandra, which se...
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SEOmoz
SEOmoz uses Cassandra to store metadata and materialized views for their Crawl Service, which currently holds data for over 1 million customer crawls, with average API response times under 100 milliseconds.
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Seven
SEVEN Networks uses Cassandra in their consumer oriented mobile applications that contain rich internet media.
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Shazam
Shazam uses Cassandra cluster to power their recommendations system.
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ShopSavvy
ShopSavvy uses Cassandra in their Big Data solution for real-time social product data, ProductCloud.  ProductCloud maintains histories of prices, products, scans and locations that number in the hundreds of billions of items
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SimpleGEO
Built a scalable GeoSpacial database on top of Cassandra.
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SimpleReach
SimpleReach uses Cassandra ingest over 100m events per day and over 500m pageviews per month in their social intelligence tool for content creators.
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Skillpages
Skillpages uses Cassandra 0.7 to help run their skill-based social network.-
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Smeet
Smeet uses Cassandra to help run their Flash virtual world (Rooms, Avatars, Chat, Games, etc.).
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SocialFlow
SocialFlow uses Cassandra to capture real-time data from Twitter and Bit.ly to help publishers, retailers, and brands earn maximum potential engagement on Twitter.
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Software Projects Inc.
Software Projects uses 20 Cassandra nodes across 3 datacenters to power the eCommerce platform for 3,000 businesses.   SPI uses Cassandra to store real-time purchase data and provide various stats for our customers.
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Sonico
Sonico uses Cassandra to help power South America’s largest social network
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SoundCloud
SoundCloud uses Cassandra to void the capped collection in MySQL and to write ±200M events in one table.

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Source Ninja
SourceNinja uses Cassandra and DataStax Enterprise to help monitor and track all open source software versions across all platforms.
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Spidertracks
Spidertracks uses Cassandra as part of their safety system to provide the reliability they require for data storage. Being able to complete upgrades and modifications without any system down time is essential to Spidertracks and Cassandra makes this easy for them.
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Spotify
"We looked at few big data solutions and Cassandra was the one that sounded like the best fit for us based on its lack of single points of failure and more importantly probably, the SS table design. It gives us some level of trust in that we won't lose data, in spite of it still being a young produc...
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Spredfast
Spredfast is using large EC2 Cassandra instances to help run their Social CRM.
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Springpad
Everything that you save (notes, bookmarks, movies, notebooks) is replicated three times, to three different servers with Cassandra. The system can transparently handle and recover from storage failures.
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Squidoo
Squidoo is using Cassandra for a gaming-overlay to award points for milestones, leveling up, awarding trophies, unlocking new features, etc, and to also log user interactions.
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Symantec
Using Cassandra on Symantec's PGP product line, in order to serve the needs of the largest enterprise and government customers.
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Tapulous
Tapulous uses Cassandra to support their Mobile Social Apps.
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Teads
Teads uses Cassandra to connect advertisers and publishers with its video marketplace to view the analytics of their activity in real-time.
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Tellybug
Tellybug uses Cassandra in the Tellybug platform which powers apps for tops shows like The X Factor and Britain’s Got Talent.
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Tendril
Tendril uses Cassandra to support random access to huge volumes of data from the smart grid.
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The Find
The Find is using Cassandra for user session data for 15 million+ sessions a month for over 400 million products.
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Trap!t
Trap!t is using Cassandra for user learning databases and back-end analytics.
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Twimpact
Twimpact uses Cassandra as it’s main database and for Twitter analysis.
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Twitter
Our geo team uses it to store and query their database of places of interest. The research team uses it to store the results of data mining done over our entire user base. Those results then feed into things like @toptweets and local trends. Our analytics, operations and infrastructure teams are wor...
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Urban Airship
Urban Airship uses Cassandra on their backend for device check-ins and transactions (send push, check status, get content).
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VerticalScope
VerticalScope uses Cassandra to power their in-house analytics and business intelligence platform.
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VigLink
Viglink is using Cassandra to help process a few million clicks a day and a few billion pageviews a month.
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Visual DNA
Visual DNA has a 16 node Cassandra cluster storing 110m users plus a 5 node Hadoop cluster. They store all real-time data for ad targeting technology.
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VNG Corporation
VNG Corporation uses Cassandra as a service backend to store feeds, comments, photo details and many more for their Zing Me social network.  Zing Me currently has ~15 millions feed items, 2 millions comments and 1.5 million new photos uploaded per day....
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Vtex
Vtex is using Cassandra to collect behavior data from its users in order to provide tools for engagement in its e-commerce platform.
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Wajam
We’re a small team fueled by Guru and espresso, with a love/hate relationship with Cassandra.
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WeR
WeR uses Cassandra as the backend for their social games.
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Where
Where’s local search and recommendation service uses Cassandra.
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Wildfire
Wildfire’s Social Marketing Suite is running on Cassandra.
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Workware Systems
Workware Systems uses Apache Cassanda in their Adaptive Case Management application, WorkwareOne™.
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WSO2
WSO2 Platform can use Cassandra as part of a data solution.  Provides Cassandra as a Service and as a standalone product with WSO2 security model.
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Wupa
Wupa uses Cassandra to power a multi-website/customer content management system.
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Xobni
At Xobni, Cassandra is used as the Data Storage Layer for Xobni Cloud, cloud-based service for storing contact, e-mail, and personal interaction data.
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Yakaz
Yakaz uses Cassandra to store millions of images as well as its social data..
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Zemanta
Zemanta uses Cassandra for storing profile data and for live analytics.
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ZipZapPlay
ZipZapPlay uses Cassandra to run their Facebook game applications.
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Zoemob
ZoeMob is a mobile service based on smartphones and tablets using Cassandra to process between 25 and 40 million check-ins every day.
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ZoomInfo
ZoomInfo uses Cassandra to store hundreds of millions of B2B ZoomInfo profiles that are stored in a multi-terabyte cache.
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