Top 30 Observability Tools — June 2026

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. For June 2026, this section uses the supplied ToolVitals data: rank, ToolVitals score, health score, shipping score, GitHub stars, status, openness_label, license_label, pricing scope, and project descriptions.

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.

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