Open Source Datomic Alternatives

The best open source alternative to Datomic is Apache Cassandra. If that doesn't suit you, our users have ranked more than 25 alternatives to Datomic and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Datomic are RethinkDB, FerretDB, H2 Database Engine and OrbitDB.

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Datomic alternatives are mainly Relational Databases but may also be Business Intelligence Tools or Database Management Tools. Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Datomic.

Datomic

Freemium • Proprietary

Datomic is a database of flexible, time-based facts, supporting queries and joins, with elastic scalability, and ACID transactions.

More about Datomic

Datomic alternatives page was last updated Nov 2, 2021

Apache Cassandra
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance.
47 Apache Cassandra alternatives
License model
- Free • Open Source
Application type
- Relational Database
Platforms
- Mac
- Windows
- Linux
- BSD
- Amazon Web Services
- Google Cloud Platform
- Microsoft Azure
Apache Cassandra Features
1. NoSQL database
2. Persistent Storage
3. High Availability
4. REST API
5. GraphQL
6. Distributed
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Apache Cassandra VS Datomic
Is Apache Cassandra a good alternative to Datomic?
- Apache Cassandra is the most popular Open Source alternative to Datomic.
- Apache Cassandra is Free and Open SourceDatomic is Freemium and Proprietary

RethinkDB
The open-source database for the realtime web.
77 RethinkDB alternatives
License model
- Free • Open Source
Platforms
- Mac
- Windows
- Linux
- BSD
RethinkDB Features
Distributed Database
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RethinkDB VS Datomic
Is RethinkDB a good alternative to Datomic?

FerretDB
FerretDB (formerly MangoDB) is an open-source proxy, which converts MongoDB wire protocol queries to SQL, and uses PostgreSQL as a database engine.
98 FerretDB alternatives
License model
- Free • Open Source
Platforms
- Mac
- Windows
- Linux
- Online
- Self-Hosted
FerretDB Features
NoSQL database
MongoDB
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FerretDB VS Datomic
Is FerretDB a good alternative to Datomic?
- FerretDB is the most popular Self-Hosted alternative to Datomic.
- FerretDB is Free and Open SourceDatomic is Freemium and Proprietary

H2 Database Engine
H2 is a relational database management system written in Java. It can be embedded in Java applications or run in the client-server mode. The disk footprint (size of the jar file) is about 1 MB.
59 H2 Database Engine alternatives
License model
- Free • Open Source
Application type
- Relational Database
Platforms
- Mac
- Windows
- Linux
H2 Database Engine VS Datomic
Is H2 Database Engine a good alternative to Datomic?

OrbitDB
OrbitDB is a serverless, distributed, peer-to-peer database. OrbitDB uses IPFS as its data storage and IPFS Pubsub to automatically sync databases with peers. It's an eventually consistent database that uses CRDTs for conflict-free database merges making OrbitDB an excellent...
102 OrbitDB alternatives
License model
- Free • Open Source
Platforms
- Mac
- Windows
- Linux
- BSD
OrbitDB Features
Serverless
Distributed
Peer-To-Peer
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OrbitDB VS Datomic
Is OrbitDB a good alternative to Datomic?

Titan Database
Titan is a scalable graph database optimized for storing and querying graphs containing hundreds of billions of vertices and edges distributed across a multi-machine cluster. Titan is a transactional database that can support thousands of concurrent users executing complex graph...
94 Titan Database alternatives
License model
- Free • Open Source
Application type
- Relational Database
Platforms
- Mac
- Windows
- Linux
Titan Database Features
Graph database
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Titan Database VS Datomic
Is Titan Database a good alternative to Datomic?

XTDB
The open database with temporal graph query.
10 XTDB alternatives
License model
- Free • Open Source
Platforms
- Self-Hosted
XTDB Features
Graph database
Show all NaN XTDB features ▾
XTDB VS Datomic
Is XTDB a good alternative to Datomic?

Datahike
Datahike is a durable Datalog database powered by an efficient Datalog query engine. This project started as a port of DataScript to the hitchhiker-tree. All DataScript tests are passing, but we are still working on the internals.
27 Datahike alternatives
License model
- Free • Open Source
Platforms
- Self-Hosted
Datahike Features
Time-machine
Persistent Storage
Clojure
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Datahike VS Datomic
Is Datahike a good alternative to Datomic?

Postgres-XC
Postgres-XC is a write-scalable synchronous multi-master PostgreSQL cluster with the following features. 1) Both read and write scalability. 2) Configured with more than one server. 3) Complete global transaction and visibility management.
50 Postgres-XC alternatives
License model
- Free • Open Source
Application types
- Relational Database
- Business Intelligence Tool
Platforms
- Linux
Discontinued
Postgres-XC has not been updated since 2015.

Postgres-XC VS Datomic
Is Postgres-XC a good alternative to Datomic?

RecallGraph
RecallGraph is a versioned-graph data store - it retains all changes that its data (vertices and edges) have gone through to reach their current state.
10 RecallGraph alternatives
License model
- Free • Open Source
Platforms
- Mac
- Windows
- Linux
- Self-Hosted
RecallGraph Features
Graphs
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RecallGraph VS Datomic
Is RecallGraph a good alternative to Datomic?