head to head · open source
opa vs flashlight
opa has 12,425 GitHub stars, 1,706 forks, 310 open issues and last shipped yesterday. flashlight has 1,612 stars, 51 forks, 29 open issues and last shipped 2 days ago. opa leads on adoption by 671% (12,425 vs 1,612 stars). opa is written in Go under Apache-2.0; flashlight is written in TypeScript under MIT. opa has attracted 14% as many forks as stars, flashlight 3%. opa was the more recently maintained of the two, and both are self-hostable with no licence fee.
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 | flashlight | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 1.6K |
| License | Apache-2.0 | MIT |
| Written in | Go | TypeScript |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 1.7K | ⑂ 51 |
| 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 flashlight if
- You want the flashlight feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and flashlight fits your workflow better
About opa
Open Policy Agent Open Policy Agent (OPA) is an open source, general purpose policy engine that enables unified, context aware policy enforcement across the entire stack. OPA is proud to be a graduated project in the Cloud Native Computing Foundation (CNCF) landscape. For details read the CNCF announcement. Get started with OPA Write your first Rego policy with the Rego Playground or use it to share your work with others for feedback and support. Have a look at the Access Control examples if you're not sure where to start. Install the VS Code extension to get started locally with live diagnostics, debugging and…
About flashlight
Get a performance score for your app 🔦 Flashlight generates a performance score for your Android app, aggregating different metrics. (📱 iOS support is also in the works) 🙅 No setup required in your app 🚀 Measure performance even on production apps ✨ Generates beautiful reports (like this Flatlist/Flashlist comparison) With Flashlight 🔦, you can either: Upload an app and get your performance score on app.flashlight.dev Or use the CLI: flashlight measure : quickly audit your perf with real time measures flashlight test : automate your measures with e2e performance testing over several iterations flashlight…
read the full flashlight overview →
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Frequently asked questions
Is opa or flashlight more popular?
opa has 12,425 GitHub stars and flashlight has 1,612. opa has the larger community by that measure.
Are opa and flashlight free?
Both are open source. opa is licensed under Apache-2.0 and flashlight under MIT. Neither carries a licence fee.
What is the difference between opa and flashlight?
opa is written in Go and flashlight in TypeScript. 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 flashlight?
Choose opa if you want the larger community (12,425 stars) or its Apache-2.0 licence terms. Choose flashlight if its feature set, stack or MIT licence fits better. Both are self-hostable.