head to head · open source
Prometheus vs finagle
Prometheus has 66,109 GitHub stars, 10,839 forks, 890 open issues and last shipped yesterday. finagle has 8,866 stars, 1,428 forks, 65 open issues and last shipped 1 months ago. Prometheus leads on adoption by 646% (66,109 vs 8,866 stars). Prometheus is written in Go under Apache-2.0; finagle is written in Scala under Apache-2.0. Prometheus has attracted 16% as many forks as stars, finagle 16%. Prometheus 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
| Prometheus | finagle | |
|---|---|---|
| GitHub stars | ★ 66K | ★ 8.9K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | Scala |
| Last push | 2026-09-17 | 2026-08-13 |
| Forks | ⑂ 11K | ⑂ 1.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Prometheus if
- You weight community size — 66K 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 finagle if
- You want the finagle feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Scala
- You evaluated both and finagle fits your workflow better
About Prometheus
Prometheus is an open source monitoring system and time series database, part of the Cloud Native Computing Foundation ecosystem. It collects metrics from configured targets at defined intervals, evaluates alerting rules, and visualizes results. Designed for reliability in dynamic environments, it operates without reliance on distributed storage, ensuring each server node functions independently.
read the full Prometheus overview →
About finagle
Finagle is a fault tolerant, protocol agnostic RPC system for the JVM, written in Scala and used to construct high concurrency servers, and it is aimed at JVM engineers who want one uniform client and server API across several network protocols instead of a separate stack for each one.
read the full finagle overview →
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Frequently asked questions
Is Prometheus or finagle more popular?
Prometheus has 66,109 GitHub stars and finagle has 8,866. Prometheus has the larger community by that measure.
Are Prometheus and finagle free?
Both are open source. Prometheus is licensed under Apache-2.0 and finagle under Apache-2.0. Neither carries a licence fee.
What is the difference between Prometheus and finagle?
Prometheus is written in Go and finagle in Scala. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Prometheus or finagle?
Choose Prometheus if you want the larger community (66,109 stars) or its Apache-2.0 licence terms. Choose finagle if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.