Observability stacks are hard to compare because the category mixes full platforms, log viewers, metrics systems, alerting tools, status pages, and newer AI/SRE assistants.
The ranking includes open/source-visible tools only and sorts first by ToolVitals score, with GitHub stars used as a secondary popularity signal when scores are close. That means a widely starred project can rank below a smaller tool if its ToolVitals score is lower; popularity is useful context, not the main ordering rule.
Rankings
| Rank | Tool | Openness | License | Health | Shipping | GitHub Stars | Score | Status |
|---|---|---|---|---|---|---|---|---|
| 1 | SigNoz | OSI-approved OSS | MIT | 100 | 100 | 27232 | 100 | 🟢 Excellent |
| 2 | OpenObserve | OSI-approved OSS | AGPL-3.0 | 100 | 100 | 19173 | 100 | 🟢 Excellent |
| 3 | Sentry | OSI-approved OSS | Apache-2.0 | 98 | 95 | 44066 | 98 | 🟢 Excellent |
| 4 | HyperDX | OSI-approved OSS | MIT | 93 | 100 | 9582 | 97 | 🟢 Excellent |
| 5 | Dozzle | OSI-approved OSS | MIT | 93 | 98 | 13209 | 94 | 🟢 Excellent |
| 6 | OpenLLMetry | OSI-approved OSS | Apache-2.0 | 95 | 89 | 7182 | 94 | 🟢 Excellent |
| 7 | HolmesGPT | OSI-approved OSS | Apache-2.0 | 93 | 100 | 2581 | 94 | 🟢 Excellent |
| 8 | Netdata | OSI-approved OSS | GPL-3.0 | 92 | 86 | 79085 | 92 | 🟢 Excellent |
| 9 | Glances | OSI-approved OSS | LGPL-3.0 | 91 | 86 | 32772 | 92 | 🟢 Excellent |
| 10 | Traceway | OSI-approved OSS | MIT | 85 | 98 | 844 | 92 | 🟢 Excellent |
| 11 | LogTide | OSI-approved OSS | AGPL-3.0 | 89 | 89 | 412 | 92 | 🟢 Excellent |
| 12 | Maintenant | OSI-approved OSS | AGPL-3.0 | 86 | 93 | 334 | 92 | 🟢 Excellent |
| 13 | Performance Co-Pilot | OSI-approved OSS | LGPL-2.1 | 85 | 87 | 1064 | 89 | 🟢 Excellent |
| 14 | Monoscope | OSI-approved OSS | AGPL-3.0 | 83 | 87 | 1050 | 89 | 🟢 Excellent |
| 15 | Robusta | OSI-approved OSS | MIT | 90 | 82 | 3032 | 88 | 🟢 Excellent |
| 16 | Keep | OSI-approved OSS | MIT | 94 | 67 | 11902 | 87 | 🟢 Excellent |
| 17 | Nightingale | OSI-approved OSS | Apache-2.0 | 84 | 73 | 13061 | 85 | 🟢 Excellent |
| 18 | Kuvasz | OSI-approved OSS | AGPL-3.0 | 83 | 69 | 522 | 82 | 🟢 Excellent |
| 19 | Checkmk | OSI-approved OSS | GPL-2.0 | 77 | 72 | 2277 | 80 | 🟢 Excellent |
| 20 | WorldMonitor | OSI-approved OSS | AGPL-3.0 | 71 | 65 | 55989 | 77 | 🟢 Good |
| 21 | Beszel | OSI-approved OSS | MIT | 82 | 53 | 22485 | 75 | 🟢 Good |
| 22 | Thanos | OSI-approved OSS | Apache-2.0 | 79 | 59 | 14094 | 75 | 🟢 Good |
| 23 | ServiceRadar | OSI-approved OSS | Apache-2.0 | 62 | 63 | 871 | 70 | 🟢 Good |
| 24 | CState | OSI-approved OSS | MIT | 67 | 14 | 2869 | 56 | 🟡 Fair |
| 25 | Lunalytics | OSI-approved OSS | AGPL-3.0 | 51 | 30 | 730 | 56 | 🟡 Fair |
| 26 | Monigo | OSI-approved OSS | Apache-2.0 | 41 | 10 | 409 | 44 | 🟡 Fair |
| 27 | SigLens | OSI-approved OSS | Apache-2.0 | 32 | 17 | 1649 | 39 | 🔴 Needs Attention |
| 28 | WatchYourLAN | OSI-approved OSS | MIT | 39 | 0 | 7025 | 36 | 🔴 Needs Attention |
| 29 | ctop | OSI-approved OSS | MIT | 33 | 0 | 17756 | 32 | 🔴 Needs Attention |
| 30 | Sampler | OSI-approved OSS | GPL-3.0 | 30 | 0 | 14571 | 30 | 🔴 Needs Attention |
Top 3 Highlights
SigNoz ranks first with a ToolVitals score of 100, health score of 100, and shipping score of 100. It is listed as OSI-approved OSS under MIT, with 27,232 GitHub stars, and its description points to a broad OpenTelemetry-native observability platform covering logs, traces, and metrics in one application.
OpenObserve also has a ToolVitals score of 100, health score of 100, and shipping score of 100. It ranks second behind SigNoz because the ranking uses GitHub stars as the secondary tie-breaker: OpenObserve has 19,173 stars versus SigNoz at 27,232. It is OSI-approved OSS under AGPL-3.0 and covers logs, metrics, traces, frontend monitoring, pipelines, and LLM observability.
Sentry ranks third with a ToolVitals score of 98, health score of 98, and shipping score of 95. It has the largest GitHub star count among the top three at 44,066, but the ranking keeps ToolVitals score first, so it follows the two 100-scoring tools. It is listed as OSI-approved OSS under Apache-2.0 and is described as developer-first error tracking and performance monitoring.
Want to see the full health, shipping, openness, and evidence details for every tool in Observability? Browse all Observability Tools →