head to head · open source
Prometheus vs lettuce
Prometheus has 66,906 GitHub stars, 10,969 forks, 890 open issues and last shipped yesterday. lettuce has 5,786 stars, 1,115 forks, 204 open issues and last shipped yesterday. Prometheus leads on adoption by 1,056% (66,906 vs 5,786 stars). Prometheus is written in Go under Apache-2.0; lettuce is written in Java under MIT. Prometheus has attracted 16% as many forks as stars, lettuce 19%. 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 | lettuce | |
|---|---|---|
| GitHub stars | ★ 67K | ★ 5.8K |
| License | Apache-2.0 | MIT |
| Written in | Go | Java |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 11K | ⑂ 1.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Prometheus if
- You weight community size — 67K 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 lettuce if
- You want the lettuce feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Java
- You evaluated both and lettuce fits your workflow better
About Prometheus
Prometheus Visit prometheus.io for the full documentation, examples and guides. [ ][quay] [ ][hub] Prometheus, a Cloud Native Computing Foundation project, is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts when specified conditions are observed. The features that distinguish Prometheus from other metrics and monitoring systems are: A multi dimensional data model (time series defined by metric name and set of key/value dimensions) PromQL, a powerful and flexible query language to…
read the full Prometheus overview →
About lettuce
Lettuce Advanced Java Redis client =============================== Lettuce is a scalable thread safe Redis client for synchronous, asynchronous and reactive usage. Multiple threads may share one connection if they avoid blocking and transactional operations such as BLPOP and MULTI / EXEC . Lettuce is built with netty. Supports advanced Redis features such as Sentinel, Cluster, Pipelining, Auto Reconnect and Redis data models. This version of Lettuce has been tested against the latest Redis source build. synchronous, asynchronous and reactive usage Redis Sentinel Redis Cluster SSL and Unix Domain Socket…
read the full lettuce overview →
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Frequently asked questions
Is Prometheus or lettuce more popular?
Prometheus has 66,906 GitHub stars and lettuce has 5,786. Prometheus has the larger community by that measure.
Are Prometheus and lettuce free?
Both are open source. Prometheus is licensed under Apache-2.0 and lettuce under MIT. Neither carries a licence fee.
What is the difference between Prometheus and lettuce?
Prometheus is written in Go and lettuce in Java. 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 lettuce?
Choose Prometheus if you want the larger community (66,906 stars) or its Apache-2.0 licence terms. Choose lettuce if its feature set, stack or MIT licence fits better. Both are self-hostable.