head to head · open source
opa vs databunker
opa has 12,256 GitHub stars, 1,686 forks, 310 open issues and last shipped yesterday. databunker has 1,485 stars, 99 forks, 4 open issues and last shipped 2 months ago. opa leads on adoption by 725% (12,256 vs 1,485 stars). opa is written in Go under Apache-2.0; databunker is written in Go under MIT. opa has attracted 14% as many forks as stars, databunker 7%. opa was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (compliance), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| opa | databunker | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 1.5K |
| License | Apache-2.0 | MIT |
| Written in | Go | Go |
| Last push | 2026-09-19 | 2026-07-28 |
| Forks | ⑂ 1.7K | ⑂ 99 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick opa if
- You weight community size — 12K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick databunker if
- You want the databunker feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and databunker fits your workflow better
About opa
Open Policy Agent (OPA) is an open source, general purpose policy engine that enables unified, context aware policy enforcement across the entire stack. It lives in the cloud native ecosystem as a graduated project in the Cloud Native Computing Foundation landscape, and it is written in Go under the Apache 2.0 license. Policy is expressed declaratively in the Rego language, and the project ships alongside a CLI, an HTTP REST API, a Go SDK, and editor tooling rather than as a single binary alone. The repository has been active for roughly eleven years, with 12,234 stars, 1,679 forks, and a last push dated 15 Septe…
About databunker
Databunker is a self hosted, Go based vault for storing and tokenizing sensitive personal records, including PII, PHI, and KYC data. It belongs to the open source compliance and data protection ecosystem, and it is licensed under MIT. The project is described as GDPR compliant, with topics covering anonymization, encryption, CCPA, GDPR, legaltech, and application server use.
read the full databunker overview →
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Frequently asked questions
Is opa or databunker more popular?
opa has 12,256 GitHub stars and databunker has 1,485. opa has the larger community by that measure.
Are opa and databunker free?
Both are open source. opa is licensed under Apache-2.0 and databunker under MIT. Neither carries a licence fee.
What is the difference between opa and databunker?
opa is written in Go and databunker in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, opa or databunker?
Choose opa if you want the larger community (12,256 stars) or its Apache-2.0 licence terms. Choose databunker if its feature set, stack or MIT licence fits better. Both are self-hostable.