head to head · open source
Prometheus vs rxdb
Prometheus has 66,133 GitHub stars, 10,846 forks, 890 open issues and last shipped yesterday. rxdb has 23,386 stars, 1,175 forks, 17 open issues and last shipped 2 days ago. Prometheus leads on adoption by 183% (66,133 vs 23,386 stars). Prometheus is written in Go under Apache-2.0; rxdb is written in TypeScript under Apache-2.0. Prometheus has attracted 16% as many forks as stars, rxdb 5%. 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 | rxdb | |
|---|---|---|
| GitHub stars | ★ 66K | ★ 23K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | TypeScript |
| Last push | 2026-09-19 | 2026-09-18 |
| Forks | ⑂ 11K | ⑂ 1.2K |
| 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 rxdb if
- You want the rxdb feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and rxdb 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 rxdb
RxDB is a local first, reactive NoSQL database for JavaScript applications, aimed at developers building offline capable or realtime user interfaces who want client side data storage and sync through their own backend rather than a hosted vendor.
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Frequently asked questions
Is Prometheus or rxdb more popular?
Prometheus has 66,133 GitHub stars and rxdb has 23,386. Prometheus has the larger community by that measure.
Are Prometheus and rxdb free?
Both are open source. Prometheus is licensed under Apache-2.0 and rxdb under Apache-2.0. Neither carries a licence fee.
What is the difference between Prometheus and rxdb?
Prometheus is written in Go and rxdb 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, Prometheus or rxdb?
Choose Prometheus if you want the larger community (66,133 stars) or its Apache-2.0 licence terms. Choose rxdb if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.