DB-EnginesInfluxDB: Focus on building software with an easy-to-use serverless, scalable time series platformEnglish
Deutsch
Knowledge Base of Relational and NoSQL Database Management Systemsprovided by solid IT

DBMS > Datomic vs. PostgreSQL vs. UniData,UniVerse

System Properties Comparison Datomic vs. PostgreSQL vs. UniData,UniVerse

Please select another system to include it in the comparison.

Editorial information provided by DB-Engines
NameDatomic  Xexclude from comparisonPostgreSQL  Xexclude from comparisonUniData,UniVerse  Xexclude from comparison
DescriptionDatomic builds on immutable values, supports point-in-time queries and uses 3rd party systems for durabilityWidely used open source RDBMS infoDeveloped as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQLMultiValue database and application server with SQL mapping layer and meta database capabilities
Primary database modelRelational DBMSRelational DBMS infowith object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.Multivalue DBMS
Secondary database modelsDocument store
Graph DBMS infowith Apache Age
Spatial DBMS
Vector DBMS infowith pgvector extension
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score2.29
Rank#140  Overall
#66  Relational DBMS
Score620.75
Rank#4  Overall
#4  Relational DBMS
Score4.32
Rank#88  Overall
#2  Multivalue DBMS
Websitewww.datomic.comwww.postgresql.orgwww.rocketsoftware.com/­products/­rocket-u2
Technical documentationdocs.datomic.comwww.postgresql.org/­docswww.rocketsoftware.com/­products/­rocket-u2/­documentation
DeveloperCognitectPostgreSQL Global Development Group infowww.postgresql.org/­developerRocket Software
Initial release20121989 info1989: Postgres, 1996: PostgreSQL1985
Current release1.0.6735, June 202316.0, September 2023
License infoCommercial or Open Sourcecommercial infolimited edition freeOpen Source infoBSDcommercial
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Aiven for PostgreSQL: Fully managed and hosted PostgreSQL® with 70+ extensions and orchestration tooling included.
Implementation languageJava, ClojureCC
Server operating systemsAll OS with a Java VMFreeBSD
HP-UX
Linux
NetBSD
OpenBSD
OS X
Solaris
Unix
Windows
AIX
HP-UX
Linux
Solaris
Windows
Data schemeyesyesschema-free
Typing infopredefined data types such as float or dateyesyesoptional
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.noyes infospecific XML-type available, but no XML query functionality.
Secondary indexesyesyesyes
SQL infoSupport of SQLnoyes infostandard with numerous extensionsyes
APIs and other access methodsRESTful HTTP APIADO.NET
JDBC
native C library
ODBC
streaming API for large objects
Java API infoJPA
JDBC
ODBC
OLE DB
Proprietary protocol
RESTful HTTP API
SOAP-based API
Supported programming languagesClojure
Java
.Net
C
C++
Delphi
Java infoJDBC
JavaScript (Node.js)
Perl
PHP
Python
Tcl
.Net
Basic infoU2 Basic
C
Java
Server-side scripts infoStored proceduresyes infoTransaction Functionsuser defined functions inforealized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.yes
TriggersBy using transaction functionsyesyes infoU2 Basic
Partitioning methods infoMethods for storing different data on different nodesnone infoBut extensive use of caching in the application peerspartitioning by range, list and (since PostgreSQL 11) by hashnone
Replication methods infoMethods for redundantly storing data on multiple nodesnone infoBut extensive use of caching in the application peersSource-replica replication infoother methods possible by using 3rd party extensionsSource-replica replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACIDACID infoconfigurable
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyes infousing external storage systems (e.g. Cassandra, DynamoDB, PostgreSQL, Couchbase and others)yesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yes inforecommended only for testing and developmentno
User concepts infoAccess controlnofine grained access rights according to SQL-standardAccess rights according to SQL-standard and operating system based

More information provided by the system vendor

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 partiesTimescale: Calling all PostgreSQL users – the 2023 State of PostgreSQL survey is now open! Share your favorite extensions, preferred frameworks, community experiences, and more. Take the survey today!
» more

Aiven for PostgreSQL: The familiar open source PostgreSQL® that you know and love, with no proprietary features or add-ons that will lock you in.
» more

Instaclustr: Fully Hosted & Managed PostgreSQL
» more

Fujitsu Enterprise Postgres: An Enterprise Grade PostgreSQL with the flexibility of a hybrid cloud solution combined with industry leading security, availability and performance.
» more

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

Redgate webinars: A series of key topics for new PostgreSQL users.
» more

pgDash: In-Depth PostgreSQL Monitoring.
» more

Datasentinel: Platform for Monitoring and Analyzing the performance problems of your PostgreSQL Clusters
» more

Navicat Monitor is a safe, simple and agentless remote server monitoring tool for PostgreSQL and many other database management systems.
» more

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

More resources
DatomicPostgreSQLUniData,UniVerse
DB-Engines blog posts

Snowflake is the DBMS of the Year 2022, defending the title from last year
3 January 2023, Matthias Gelbmann, Paul Andlinger

Snowflake is the DBMS of the Year 2021
3 January 2022, Paul Andlinger, Matthias Gelbmann

Driving the Future of PostgreSQL Adoption
15 November 2021,  Umair Shahid, Percona (sponsor) 

show all

Conferences and events

PostgreSQL 101: An introduction to Multi-Version Concurrency Control and Vacuum
Webinar with Q&A, 11am CT / 5pm BST, 24 October 2023

Recent citations in the news

The Architecture of Datomic
2 November 2012, InfoQ.com

Lucas Cavalcanti on Using Clojure, Microservices, Hexagonal ...
16 August 2021, InfoQ.com

Nubank buys firm behind Clojure programming language
28 July 2020, Finextra

Clojure inventor Hickey now aims for Android
22 March 2012, InfoWorld

Architecting Software for Leverage
13 November 2021, InfoQ.com

provided by Google News

High Performance Functions in Rust on RDS PostgreSQL
25 September 2023, InfoQ.com

Timescale Strengthens and Accelerates AI Development with ...
29 September 2023, Database Trends and Applications

4 key new features in PostgreSQL 16
14 September 2023, InfoWorld

Understanding the Fundamentals of PostgreSQL® Architecture
25 September 2023, Datanami

PostgreSQL 16 Expands Analytics Capabilities
22 September 2023, The New Stack

provided by Google News

Unidata purchases own ordinary shares for EUR22,000 -September ...
25 September 2023, Marketscreener.com

Unidata continues with buybacks of its own ordinary shares
18 September 2023, Marketscreener.com

Unidata lands EUR 9.5 mln IoT-based smart monitoring deal
5 September 2023, Telecompaper EN

Tsunami Detection System Market is expected to witness Incredible Growth forecast 2030 | Sonardyne, A3M,
25 September 2023, Benzinga

Unidata uses Jetstream to make geoscience data available to ...
29 January 2020, IU Newsroom

provided by Google News

Job opportunities

Junior Backend Developer
Actum Lab, Austin, TX

Software Development Engineer
Adobe, Lehi, UT

Software Development Engineer I (Remote - Within the Wilbur Ellis Geographical Footprint)
Wilbur-Ellis Company LLC, Portland, OR

Software Development Engineer I (Remote - Within the Wilbur Ellis Geographical Footprint)
Wilbur-Ellis Company, Tukwila, WA

Database Analyst- 20 hours/wk.- Remote
Ellumen, Silver Spring, MD

Logistics Warehouse Associate II
NWN Carousel, Sacramento, CA

Quality Auditor
Cabinetworks Group, Middlefield, OH

Systems Administrator
William Jewell College, Liberty, MO

EPICOR Application Support Analyst
M&D, Humble, TX

Database Administrator
William Jewell College, Liberty, MO

jobs by Indeed



Share this page

Featured Products

Redis logo

The world’s most loved real‑time data platform.
Try free

AllegroGraph logo

Graph Database Leader for AI Knowledge Graph Applications - The Most Secure Graph Database Available.
Free Download

MariaDB logo

SkySQL, the ultimate
MariaDB cloud, is here.

Get started with SkySQL today!

Datastax Astra logo

Bring all your data to Generative AI applications with vector search enabled by the most scalable
vector database available.
Try for Free

Neo4j logo

See for yourself how a graph database can make your life easier.
Use Neo4j online for free.

Present your product here