head to head · open source
Prometheus vs ubicloud
Prometheus has 66,109 GitHub stars, 10,839 forks, 890 open issues and last shipped yesterday. ubicloud has 12,267 stars, 587 forks, 95 open issues and last shipped today. Prometheus leads on adoption by 439% (66,109 vs 12,267 stars). Prometheus is written in Go under Apache-2.0; ubicloud is written in Ruby under AGPL-3.0. Prometheus has attracted 16% as many forks as stars, ubicloud 5%. ubicloud 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 | ubicloud | |
|---|---|---|
| GitHub stars | ★ 66K | ★ 12K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Go | Ruby |
| Last push | 2026-09-17 | 2026-09-18 |
| Forks | ⑂ 11K | ⑂ 587 |
| 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 ubicloud if
- You want the ubicloud feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Ruby
- You evaluated both and ubicloud 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 ubicloud
Ubicloud is an open source cloud platform that delivers IaaS features — elastic compute, non replicated block storage, firewall and load balancer, managed Postgres, Kubernetes, AI inference, and IAM services — on bare metal hardware, for teams that want public cloud convenience without closed source lock in or premium rental pricing.
read the full ubicloud overview →
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Frequently asked questions
Is Prometheus or ubicloud more popular?
Prometheus has 66,109 GitHub stars and ubicloud has 12,267. Prometheus has the larger community by that measure.
Are Prometheus and ubicloud free?
Both are open source. Prometheus is licensed under Apache-2.0 and ubicloud under AGPL-3.0. Neither carries a licence fee.
What is the difference between Prometheus and ubicloud?
Prometheus is written in Go and ubicloud in Ruby. 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 ubicloud?
Choose Prometheus if you want the larger community (66,109 stars) or its Apache-2.0 licence terms. Choose ubicloud if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.