DB-EnginesInfluxDB download bannerEnglish
Deutsch
Knowledge Base of Relational and NoSQL Database Management Systemsprovided by solid IT

DBMS > Firebase Realtime Database vs. IBM Db2 Event Store vs. PostgreSQL vs. Realm

System Properties Comparison Firebase Realtime Database vs. IBM Db2 Event Store vs. PostgreSQL vs. Realm

Please select another system to include it in the comparison.

Editorial information provided by DB-Engines
NameFirebase Realtime Database  Xexclude from comparisonIBM Db2 Event Store  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.Distributed Event Store optimized for Internet of Things use casesWidely 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 storeEvent Store
Time Series DBMS
Relational 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 modelsDocument store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score12.35
Rank#38  Overall
#6  Document stores
Score0.30
Rank#240  Overall
#2  Event Stores
#14  Time Series DBMS
Score506.94
Rank#4  Overall
#4  Relational DBMS
Score8.85
Rank#44  Overall
#8  Document stores
Websitefirebase.google.com/­products/­realtime-databasewww.ibm.com/­products/­db2-event-storewww.postgresql.orgrealm.io
Technical documentationfirebase.google.com/­docs/­databasewww.ibm.com/­support/­knowledgecenter/­en/­SSGNPV_1.1.2/­eventstore/­welcome.htmlwww.postgresql.org/­docs/­manualsrealm.io/­docs
DeveloperGoogle infoacquired by Google 2014IBMPostgreSQL Global Development Group infowww.postgresql.org/­developerRealm, acquired by MongoDB in May 2019
Initial release201220171989 info1989: Postgres, 1996: PostgreSQL2014
Current release1.1.312.2, February 2020
License infoCommercial or Open Sourcecommercialcommercial infofree developer edition availableOpen 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 languageC++, ScalaC
Server operating systemshostedLinux infoLinux, macOS, Windows for the developer additionFreeBSD
HP-UX
Linux
NetBSD
OpenBSD
OS X
Solaris
Unix
Windows
Android
Backend: server-less
iOS
Windows
Data schemeschema-freeyesyesyes
Typing infopredefined data types such as float or dateyesyesyesyes
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 indexesyesnoyesyes
SQL infoSupport of SQLnoyes infothrough the embedded Spark runtimeyes infostandard with numerous extensionsno
APIs and other access methodsAndroid
iOS
JavaScript API
RESTful HTTP API
JDBC
RESTful HTTP API
ADO.NET
JDBC
native C library
ODBC
streaming API for large objects
Supported programming languagesJava
JavaScript
Objective-C
Java
Python
Scala
.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 nodesActive-active shard replicationMaster-slave replication infoother methods possible by using 3rd party extensionsnone
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual Consistency infoif the client is offline
Immediate Consistency infoif the client is online
Eventual ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynonoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datayesnoACIDACID
Concurrency infoSupport for concurrent manipulation of datayesNo - written data is immutableyes
Durability infoSupport for making data persistentyesYes - Synchronous writes to local disk combined with replicationyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesnoyes infoIn-Memory realm
User concepts infoAccess controlyes, based on authentication and database rulesUser level access controlfine grained access rights according to SQL-standardyes
More information provided by the system vendor
Firebase Realtime DatabaseIBM Db2 Event StorePostgreSQLRealm
Specific characteristicsNow a part of MongoDB Data Platform , Realm Database is the fast, easy to use, and...
» more
Competitive advantagesRealm ensures offline-first functionality, meaning apps run smoothly and deliver...
» more
Typical application scenariosMobile Consumer Apps First-Line Worker Apps
» more
Key customersCathay Pacific Royal Carribbean Cruise Lines Open Source Database powers apps built...
» more
Market metricsUsed by 100,000+ developers 2 bn installs Currently used in 40k+ applications in...
» more
Licensing and pricing modelsRealm database is licensed under the Apache License v2.0.
» more

We invite representatives of system vendors to contact us for updating and extending the system information,
and for displaying vendor-provided information such as key customers, competitive advantages and market metrics.

Related products and services
3rd partiesSQLPro for PostgreSQL: A simple but powerful PostgreSQL database client available on iPhone and iPad as well as macOS.
» more

Dremio is like magic for PostgreSQL accelerating your analytical queries up to 1,000x.
» more

Azure Database for PostgreSQL provides fully managed, enterprise-ready community PostgreSQL database as a service
» more

DBHawk: a web-based PostgreSQL/Greenplum database tool. Boost database development and BI productivity with an online Universal database tool.
» more

Navicat for PostgreSQL is an easy-to-use graphical tool for PostgreSQL database development.
» more

pgDash: In-Depth PostgreSQL Monitoring.
» more

General SQL Parser: Instantly adding parsing, decoding, analysis and rewrite SQL processing capability to your products.
» more

CYBERTEC: your professional partner for PostgreSQL services and Data Science based on PostgreSQL since 2000. With offices in Austria, Uruguay, Estonia and Switzerland, CYBERTEC operates worldwide!
» more

2ndQuadrant: PostgreSQL Solutions for the Enterprise.
» more

We invite representatives of vendors of related products to contact us for presenting information about their offerings here.

More resources
Firebase Realtime DatabaseIBM Db2 Event StorePostgreSQLRealm
DB-Engines blog posts

Cloud-based DBMS's popularity grows at high rates
12 December 2019, Paul Andlinger

show all

PostgreSQL is the DBMS of the Year 2018
2 January 2019, Paul Andlinger, Matthias Gelbmann

PostgreSQL is the DBMS of the Year 2017
2 January 2018, Paul Andlinger, Matthias Gelbmann

Microsoft SQL Server is the DBMS of the Year
4 January 2017, Matthias Gelbmann, Paul Andlinger

show all

MySQL, PostgreSQL and Redis are the winners of the March ranking
2 March 2016, Paul Andlinger

show all

Conferences and events

PGCon 2020, PostgreSQL Conference for Users and Developers
Ottawa, Canada, 26-29 May 2020

Recent citations in the news

5 cloud database comparison tips to guide your data strategy
23 January 2020, TechTarget

Exposed Firebase databases hidden by Google search
2 December 2019, TechTarget

Compare Google Cloud Firestore and Firebase Realtime Database
9 August 2019, TechTarget

AI workshop held at Ubunifu college
13 February 2020, CIO East Africa

Simprints identifies cloud as foundation for biometrics-led healthcare
7 February 2020, Diginomica

provided by Google News

How IBM Is Turning Db2 into an 'AI Database'
3 June 2019, Datanami

Best cloud databases of 2020
18 December 2019, Techradar

IBM Confronts AI Resistance
23 October 2019, RTInsights

IBM Builds New Ultra-Fast Platform for Hoovering Up and Analyzing Data from Anywhere
31 May 2018, Data Center Knowledge

IBM releases Cloud Private for Data
29 May 2018, ZDNet

provided by Google News

Google lays out HarbourBridge to tempt PostgreSQL users onto Cloud Spanner • DEVCLASS
13 February 2020, DevClass

Crunchy PostgreSQL for Kubernetes 4.2 Receives Red Hat OpenShift Operator Certification
10 February 2020, Yahoo Finance

Veeam Availability Suite hits the tenth grade
18 February 2020, Blocks and Files

Global Database Software Market,Top Key Players: Oracle, Microsoft, IBM, SAP, Amazon Web Services, SolarWinds, Airtable, MariaDB Corporation Ab, PostgreSQL, QuintaDB, Sonadier
18 February 2020, News Parents

Database Management System (DBMS) Market Seeking Excellent Growth | Microsoft, Software AG, IBM, Oracle, PostgreSQL
7 February 2020, Instant Tech News

provided by Google News

Realm Makes PostgreSQL Real-Time with New Connector
21 March 2017, Database Trends and Applications

Realm Receives Investment from Ericsson Ventures to Advance Development of Edge Computing Solutions
21 September 2017, Business Wire

Kotlin Programming Language Will Surpass Java On Android Next Year
15 October 2017, Fossbytes

Q&A with Ed Lee on RAID, Virtualization-Aware Storage
15 August 2012, Virtualization Review

Box Introduces the Box File Collaboration API
24 December 2016, ProgrammableWeb

provided by Google News

Job opportunities

PROFESSIONAL XAMARIN DEVELOPER
Edge One Solutions, Remote

Data Engineer
Petuum, Sunnyvale, CA

Technical Lead
Photon, New York, NY

Business Intelligence Analyst
CBS, New York, NY

Data Analyst/Developer
RPX, San Francisco, CA

Cybersecurity Researcher - Cylera
Triplebyte, New York, NY

PostgreSQL Consultant - remote
Percona, Remote

Entry Level Data Scientist
RTI International, Durham, NC

Head of People and Culture
Percona, Remote

Head of Resellers & Channels
Percona, Remote

Software Engineer, iOS
Warner Bros. Entertainment Group, Philadelphia, PA

Software Engineer, iOS
Lyft, San Francisco, CA

jobs by Indeed




Share this page

Featured Products

RavenDB logo

Setup a fully managed RavenDB Cloud Database in minutes. Enjoy hosting, management, backups all in one place.
Grab a Free Instance

MariaDB logo

How do MariaDB, Oracle MySQL and EnterpriseDB compare?
Get the white paper to
learn more.

Couchbase logo

SQL + JSON + NoSQL.
Power, flexibility & scale.
All open source.
Get started now.

Neo4j logo

Get your free copy of the new O'Reilly book Graph Algorithms with 20+ examples for
machine learning, graph analytics and more.

Datastax Luna logo

Simple, subscription-based support for open source
Apache Cassandra™ from the Cassandra experts.
Learn more.

Present your product here