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DBMS > Firebase Realtime Database vs. Oracle NoSQL vs. PostgreSQL vs. Realm

System Properties Comparison Firebase Realtime Database vs. Oracle NoSQL vs. PostgreSQL vs. Realm

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Editorial information provided by DB-Engines
NameFirebase Realtime Database  Xexclude from comparisonOracle NoSQL  Xexclude from comparisonPostgreSQL  Xexclude from comparisonRealm  Xexclude from comparison
DescriptionCloud-hosted realtime document store. iOS, Android, and JavaScript clients share one Realtime Database instance and automatically receive updates with the newest data.Key-value store based on Berkeley DB Java EditionWidely used open source RDBMS infoDeveloped as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQLA DBMS built for use on mobile devices that’s a fast, easy to use alternative to SQLite and Core Data
Primary database modelDocument storeKey-value storeRelational DBMS infowith object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.Document store
Secondary database modelsRelational DBMSDocument store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score12.35
Rank#38  Overall
#6  Document stores
Score3.91
Rank#74  Overall
#13  Key-value stores
Score506.94
Rank#4  Overall
#4  Relational DBMS
Score8.85
Rank#44  Overall
#8  Document stores
Websitefirebase.google.com/­products/­realtime-databasewww.oracle.com/­database/­nosql/­index.htmlwww.postgresql.orgrealm.io
Technical documentationfirebase.google.com/­docs/­databasedocs.oracle.com/­cd/­NOSQL/­index.htmlwww.postgresql.org/­docs/­manualsrealm.io/­docs
DeveloperGoogle infoacquired by Google 2014OraclePostgreSQL Global Development Group infowww.postgresql.org/­developerRealm, acquired by MongoDB in May 2019
Initial release201220111989 info1989: Postgres, 1996: PostgreSQL2014
Current release19.5, November 201912.2, February 2020
License infoCommercial or Open SourcecommercialOpen Source infoApache V2 for Community Edition, proprietary license for Enterprise EditionOpen Source infoBSDOpen Source
Cloud-based only infoOnly available as a cloud serviceyesnonono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
  • Azure Database for PostgreSQL: A fully managed, scalable PostgreSQL relational database with high availability and security built in at no extra cost
  • ScaleGrid: Fully managed PostgreSQL hosting with high availability, dedicated servers, and superuser control on the #1 multi-cloud Amazon RDS alternative.
Implementation languageJavaC
Server operating systemshostedLinux
Solaris SPARC/x86
FreeBSD
HP-UX
Linux
NetBSD
OpenBSD
OS X
Solaris
Unix
Windows
Android
Backend: server-less
iOS
Windows
Data schemeschema-freeoptional, scheme definition possible with AVRO or in 'table-style'yesyes
Typing infopredefined data types such as float or dateyesoptionalyesyes
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.nonoyes infospecific XML-type available, but no XML query functionality.no
Secondary indexesyesyesyesyes
SQL infoSupport of SQLnoSQL-like DML and DDL statementsyes infostandard with numerous extensionsno
APIs and other access methodsAndroid
iOS
JavaScript API
RESTful HTTP API
RESTful HTTP APIADO.NET
JDBC
native C library
ODBC
streaming API for large objects
Supported programming languagesJava
JavaScript
Objective-C
C
C#
Java
JavaScript (Node.js)
Python
.Net
C
C++
Delphi
Java infoJDBC
JavaScript (Node.js)
Perl
PHP
Python
Tcl
.Net
Java infowith Android only
Objective-C
React Native
Swift
Server-side scripts infoStored procedureslimited functionality with using 'rules'nouser defined functions inforealized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.no inforuns within the applications so server-side scripts are unnecessary
TriggersCallbacks are triggered when data changesnoyesyes infoChange Listeners
Partitioning methods infoMethods for storing different data on different nodesShardingpartitioning by range, list and (since PostgreSQL 11) by hashnone
Replication methods infoMethods for redundantly storing data on multiple nodesElectable Master-Slave per shardMaster-slave replication infoother methods possible by using 3rd party extensionsnone
MapReduce infoOffers an API for user-defined Map/Reduce methodsnowith Hadoop integrationnono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency infoif the client is offline
Immediate Consistency infoif the client is online
Eventual Consistency
Immediate Consistency infodepending on configuration
Immediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynonoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datayesconfigurable infoACID within a storage node (=shard)ACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yes infooff heap cachenoyes infoIn-Memory realm
User concepts infoAccess controlyes, based on authentication and database rulesAccess rights for users and rolesfine grained access rights according to SQL-standardyes
More information provided by the system vendor
Firebase Realtime DatabaseOracle NoSQLPostgreSQLRealm
Specific characteristicsOracle NoSQL Database is a scalable , distributed NoSQL database, designed to provide...
» more
Now a part of MongoDB Data Platform , Realm Database is the fast, easy to use, and...
» more
Competitive advantagesData can be modeled as relational-database-style tables, JSON documents, RDF Triples...
» more
Realm ensures offline-first functionality, meaning apps run smoothly and deliver...
» more
Typical application scenariosInternet of Things where large volume of data needs to be stored and processed very...
» more
Mobile Consumer Apps First-Line Worker Apps
» more
Key customersLarge credit card company Airbus NTT Docomo Global rewards company
» more
Cathay Pacific Royal Carribbean Cruise Lines Open Source Database powers apps built...
» more
Market metricsOracle NoSQL Database is used by hundreds of companies around the world. Oracle NoSQL...
» more
Used by 100,000+ developers 2 bn installs Currently used in 40k+ applications in...
» more
Licensing and pricing modelsOracle NoSQL Database Enterprise Edition can be purchased under the Oracle Commercial...
» more
Realm database is licensed under the Apache License v2.0.
» more

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More resources
Firebase Realtime DatabaseOracle NoSQLPostgreSQLRealm
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