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TerminusDB
What it is
TerminusDB is a free, open-source document graph database that stores JSON documents in a schema-enforced graph with Git-like data versioning. Its version controls support branching, diffing, merging, cloning, synchronization, and time-travel operations. Commits are ACID transactions, and every write undergoes schema validation. Developers can use an HTTP document API, GraphQL, or WOQL, a Datalog-based query language. GraphQL works with Apollo, urql, Relay, and other clients; official libraries cover TypeScript/JavaScript and Python, with Rust documented. Role-based access control uses users, roles, capabilities, and resource scopes. Deployment documentation covers Docker, Linux or macOS source builds, and Kubernetes, while DFRNT provides cloud instances. TerminusDB supports ontology modeling, semantic reasoning, graph visualization, and imports CSV, JSON, JSON-LD, RDF/XML, and Turtle. It does not support RDF/SPARQL. DFRNT assumed stewardship in 2025.
For and against
For
- Git-like branching and data history
- ACID commits with schema validation
- HTTP, GraphQL, and WOQL interfaces
- Role-based access control
- Runs with Docker or Kubernetes
Against
- No RDF/SPARQL support
- PostgreSQL suits relational analytics better
- Self-hosting requires deployment work
The verdict
TerminusDB combines graph modeling, strict schemas, transactions, and version control for evolving data. Teams needing RDF/SPARQL or relational analytics may need another fit.
Who it suits
It suits developers and data engineers handling auditable lineage, complex domain models, collaborative workflows, or changing structured content.
Plans and prices
TerminusDB Open Source Community Version
Apache 2.0 licensed · run on your own computer
Read 3 Oct 2026 · terminusdb.org
On the record
- Cloud hosting
- The official site identifies DFRNT as TerminusDB's hosting provider and describes cloud instances for getting started and collaborating.terminusdb.org · read 3 Oct 2026
- Deployment
- The quickstart runs TerminusDB in Docker, and the documentation also describes building from source on Linux or macOS and running it on Kubernetes.terminusdb.org · read 3 Oct 2026
- Integrations
- Its GraphQL interface works with Apollo, urql, Relay, and other GraphQL clients; official client libraries are available for TypeScript/JavaScript and Python, with Rust also documented.terminusdb.org · read 3 Oct 2026
- Intended users
- The documentation describes TerminusDB as designed for developers and data engineers working with auditable data lineage, complex domain models, collaborative data workflows, or evolving structured content.terminusdb.org · read 3 Oct 2026
- Maintainer
- The project documentation says DFRNT assumed stewardship in 2025 and maintains TerminusDB with the open-source community.terminusdb.org · read 3 Oct 2026
- Notable limit
- The comparison page says PostgreSQL is better suited to relational analytics, mature ORMs, and a very large extensions ecosystem.terminusdb.org · read 3 Oct 2026
- Product
- TerminusDB is an open-source document graph database that stores JSON documents in a schema-enforced graph and includes Git-like version control.terminusdb.org · read 3 Oct 2026
- Query interfaces
- TerminusDB provides an HTTP document API, GraphQL, and WOQL, a Datalog-based query language.terminusdb.org · read 3 Oct 2026
- Query security
- The WOQL documentation says its typed AST design prevents query injection by construction, while noting that authentication, authorization, and business-logic vulnerabilities can still exist.terminusdb.org · read 3 Oct 2026
- Security
- TerminusDB provides role-based access control using users, roles, capabilities, and resource scopes.terminusdb.org · read 3 Oct 2026
- Support
- The official site directs users to the TerminusDB community on Discord and to GitHub for other ways to connect.terminusdb.org · read 3 Oct 2026
- Transactions
- The documentation says commits are ACID transactions and schema validation is enforced on every write.terminusdb.org · read 3 Oct 2026
- Version control
- It supports branching, diffing, merging, cloning, synchronization, and time-travel operations over data.terminusdb.org · read 3 Oct 2026
