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DBMS > Citus vs. FaunaDB vs. Firebase Realtime Database vs. Greenplum vs. Hazelcast

System Properties Comparison Citus vs. FaunaDB vs. Firebase Realtime Database vs. Greenplum vs. Hazelcast

Editorial information provided by DB-Engines
NameCitus  Xexclude from comparisonFaunaDB  Xexclude from comparisonFirebase Realtime Database  Xexclude from comparisonGreenplum  Xexclude from comparisonHazelcast  Xexclude from comparison
DescriptionScalable hybrid operational and analytics RDBMS for big data use cases based on PostgreSQLFaunaDB provides a web-native interface, with support for GraphQL and custom business logic that integrates seamlessly with the rest of the serverless ecosystem. The underlying globally distributed storage and compute platform is fast, consistent, and reliable, with a modern security infrastructure.Cloud-hosted realtime document store. iOS, Android, and JavaScript clients share one Realtime Database instance and automatically receive updates with the newest data.Analytic Database platform built on PostgreSQL. Full name is Pivotal Greenplum Database infoA logical database in Greenplum is an array of individual PostgreSQL databases working together to present a single database image.A widely adopted in-memory data grid
Primary database modelRelational DBMSDocument store
Graph DBMS
Relational DBMS
Time Series DBMS
Document storeRelational DBMSKey-value store
Secondary database modelsDocument storeDocument storeDocument store infoJSON support with IMDG 3.12
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score1.27
Rank#149  Overall
#73  Relational DBMS
Score1.78
Rank#128  Overall
#21  Document stores
#9  Graph DBMS
#64  Relational DBMS
#9  Time Series DBMS
Score16.85
Rank#36  Overall
#6  Document stores
Score13.22
Rank#39  Overall
#24  Relational DBMS
Score9.77
Rank#43  Overall
#5  Key-value stores
Websitewww.citusdata.comfauna.comfirebase.google.com/­products/­realtime-databasegreenplum.orghazelcast.com
Technical documentationdocs.citusdata.comdocs.fauna.comfirebase.google.com/­docs/­databasedocs.greenplum.orghazelcast.org/­imdg/­docs
DeveloperFauna, Inc.Google infoacquired by Google 2014Pivotal Software Inc.Hazelcast
Initial release20102014201220052008
Current release8.1, December 20186.7.1, April 20204.1, November 2020
License infoCommercial or Open SourceOpen Source infoAGPL, commercial license also availablecommercialcommercialOpen Source infoApache 2.0Open Source infoApache Version 2; commercial licenses available
Cloud-based only infoOnly available as a cloud servicenoyesyesnono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageCScalaJava
Server operating systemsLinuxhostedhostedLinuxAll OS with a Java VM
Data schemeyesschema-freeschema-freeyesschema-free
Typing infopredefined data types such as float or dateyesnoyesyesyes
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.yes infospecific XML type available, but no XML query functionalitynonoyes infosince Version 4.2yes infothe object must implement a serialization strategy
Secondary indexesyesyesyesyesyes
SQL infoSupport of SQLyes infostandard, with numerous extensionsnonoyesSQL-like query language
APIs and other access methodsADO.NET
JDBC
native C library
ODBC
streaming API for large objects
RESTful HTTP APIAndroid
iOS
JavaScript API
RESTful HTTP API
JDBC
ODBC
JCache
JPA
Memcached protocol
RESTful HTTP API
Supported programming languages.Net
C
C++
Delphi
Java
JavaScript (Node.js)
Perl
PHP
Python
Tcl
C#
Go
Java
JavaScript
Python
Ruby
Scala
Swift
Java
JavaScript
Objective-C
C
Java
Perl
Python
R
.Net
C#
C++
Clojure
Go
Java
JavaScript (Node.js)
Python
Scala
Server-side scripts infoStored proceduresuser defined functions inforealized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.user defined functionslimited functionality with using 'rules'yesyes infoEvent Listeners, Executor Services
TriggersyesnoCallbacks are triggered when data changesyesyes infoEvents
Partitioning methods infoMethods for storing different data on different nodesShardinghorizontal partitioning infoconsistent hashingShardingSharding
Replication methods infoMethods for redundantly storing data on multiple nodesSource-replica replication infoother methods possible by using 3rd party extensionsMulti-source replicationSource-replica replicationyes infoReplicated Map
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononoyesyes
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyEventual Consistency infoif the client is offline
Immediate Consistency infoif the client is online
Immediate ConsistencyImmediate Consistency or Eventual Consistency selectable by user infoRaft Consensus Algorithm
Foreign keys infoReferential integrityyesyesnoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACIDyesACIDone or two-phase-commit; repeatable reads; read commited
Concurrency infoSupport for concurrent manipulation of datayesyesyesyesyes
Durability infoSupport for making data persistentyesyesyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.nononoyes
User concepts infoAccess controlfine grained access rights according to SQL-standardIdentity management, authentication, and access controlyes, based on authentication and database rulesfine grained access rights according to SQL-standardRole-based access control
More information provided by the system vendor
CitusFaunaDBFirebase Realtime DatabaseGreenplumHazelcast
Specific characteristicsFlexible query model that combines GraphQL with custom business logic Effortlessly...
» more
Hazelcast is an in-memory computing platform that runs applications with extremely...
» more
Competitive advantagesNative GraphQL support with automatic mutations for easy on-ramp Native GraphQL,...
» more
Hazelcast has an optimized, multi-threaded architecture that enables the highest...
» more
Typical application scenariosJavascript apps Serverless backends for microservices Cloud-native apps B2B and B2C...
» more
Hazelcast powers many types of large-scale, data processing applications. A sample...
» more
Key customersShiftX
» more
Hazelcast customers include 50 of the world’s largest financial services companies,...
» more
Licensing and pricing modelsUsage-based pricing including a free tier
» more
Hazelcast provides both open source and commercial software. The open source offering...
» more

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CitusFaunaDBFirebase Realtime DatabaseGreenplumHazelcast
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