head to head · open source
Prometheus vs Weaviate
Prometheus has 66,106 GitHub stars, 10,840 forks, 890 open issues and last shipped yesterday. Weaviate has 16,818 stars, 1,403 forks, 738 open issues and last shipped yesterday. Prometheus leads on adoption by 293% (66,106 vs 16,818 stars). Prometheus is written in Go under Apache-2.0; Weaviate is written in Go under a custom or non-standard licence. Prometheus has attracted 16% as many forks as stars, Weaviate 8%. Weaviate 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.
← all 8884 open source comparisons
Side by side
| Prometheus | Weaviate | |
|---|---|---|
| GitHub stars | ★ 66K | ★ 17K |
| License | Apache-2.0 | Custom / other |
| Written in | Go | Go |
| Last push | 2026-09-17 | 2026-09-17 |
| 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 Weaviate if
- You want the Weaviate feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Go
- You evaluated both and Weaviate 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 Weaviate
Weaviate open source vector database. Stores objects and vectors together. Lives in cloud native database and AI search ecosystem. Enables semantic search at scale. Combines vector similarity search with keyword filtering, retrieval augmented generation, and reranking in single query interface.
read the full Weaviate overview →
More in Infrastructure & Operations
Related comparisons
More Databases projects
Compare either of these against the rest of the Databases field.
Frequently asked questions
Is Prometheus or Weaviate more popular?
Prometheus has 66,106 GitHub stars and Weaviate has 16,818. Prometheus has the larger community by that measure.
Are Prometheus and Weaviate free?
Both are open source. Prometheus is licensed under Apache-2.0, and Weaviate has no licence declared in this registry. Both are free to self-host.
What is the difference between Prometheus and Weaviate?
Prometheus is written in Go and Weaviate 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, Prometheus or Weaviate?
Choose Prometheus if you want the larger community (66,106 stars) or its Apache-2.0 licence terms. Choose Weaviate if its feature set, stack or Custom / other licence fits better. Both are self-hostable.