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Best Respan (formerly Keywords AI) Alternatives in 2026

Updated

20 apps from AI agent observability tools ranked against Respan (formerly Keywords AI) on the same published basis.

  1. 1
    PetalTrace Free plan apiLinuxMacself-hostedWeb Free7.4
    Respan (formerly Keywords AI) vs PetalTrace
  2. 2
    OpenLIT Free plan apiLinuxMacself-hostedWeb Free7.2
    Respan (formerly Keywords AI) vs OpenLIT
  3. 3
    W&B Weave Free plan apiLinuxMacself-hostedWeb $60/mo7.2
    Respan (formerly Keywords AI) vs W&B Weave
  4. 4
    SigNoz Free plan AndroidapiiOSself-hostedWeb $19/mo7.1
    Respan (formerly Keywords AI) vs SigNoz
  5. 5
    Opik Free plan apiLinuxself-hostedWeb $19/mo7.0
    Respan (formerly Keywords AI) vs Opik
  6. 6
    Agenta Free plan apiself-hostedWeb $29/mo6.9
    Respan (formerly Keywords AI) vs Agenta
  7. 7
    Langfuse Free plan apiself-hostedWeb $29/mo6.9
    Respan (formerly Keywords AI) vs Langfuse
  8. 8
    LangWatch Free plan apiLinuxself-hostedWeb €29/mo6.9
    Respan (formerly Keywords AI) vs LangWatch
  9. 9
    Traccia Free plan apiWeb $99/mo6.9
    Respan (formerly Keywords AI) vs Traccia
  10. 10
    TraceRoot Free plan Web $30/mo6.9
    Respan (formerly Keywords AI) vs TraceRoot
  11. 11
    VoltOps Free plan apiself-hostedWeb $50/mo6.9
    Respan (formerly Keywords AI) vs VoltOps
  12. 12
    Arize AX Free plan apiself-hostedWeb $50/mo6.8
    Respan (formerly Keywords AI) vs Arize AX
  13. 13
    Braintrust Free plan apiself-hostedWeb $249/mo6.8
    Respan (formerly Keywords AI) vs Braintrust
  14. 14
    Fiddler AI Free plan apiself-hostedWeb Free6.8
    Respan (formerly Keywords AI) vs Fiddler AI
  15. 15
    Galileo Free plan apiself-hostedWeb $100/mo6.8
    Respan (formerly Keywords AI) vs Galileo
  16. 16
    Helicone Free plan apiself-hostedWeb $79/mo6.8
    Respan (formerly Keywords AI) vs Helicone
  17. 17
    HoneyHive Free plan apiself-hostedWeb Free6.8
    Respan (formerly Keywords AI) vs HoneyHive
  18. 18
    Laminar Free plan apiself-hostedWeb $30/mo6.8
    Respan (formerly Keywords AI) vs Laminar
  19. 19
    LangSmith Free plan apiself-hostedWeb $39/mo6.8
    Respan (formerly Keywords AI) vs LangSmith
  20. 20
    LogicGaze Free plan apiself-hostedWeb Free6.8
    Respan (formerly Keywords AI) vs LogicGaze

Respan (formerly Keywords AI) alternatives compared

#AppScoreFree planFromRuns on
1PetalTrace7.4Free planFreeAPI, Linux, Mac, self-hosted, Web, Windows
2OpenLIT7.2Free planFreeAPI, Linux, Mac, self-hosted, Web, Windows
3W&B Weave7.2Free plan$60/moAPI, Linux, Mac, self-hosted, Web, Windows
4SigNoz7.1Free plan$19/moAndroid, API, iOS, self-hosted, Web
5Opik7.0Free plan$19/moAPI, Linux, self-hosted, Web
6Agenta6.9Free plan$29/moAPI, self-hosted, Web
7Langfuse6.9Free plan$29/moAPI, self-hosted, Web
8LangWatch6.9Free plan€29/moAPI, Linux, self-hosted, Web
9Traccia6.9Free plan$99/moAPI, Web
10TraceRoot6.9Free plan$30/moWeb
11VoltOps6.9Free plan$50/moAPI, self-hosted, Web
12Arize AX6.8Free plan$50/moAPI, self-hosted, Web
13Braintrust6.8Free plan$249/moAPI, self-hosted, Web
14Fiddler AI6.8Free planFreeAPI, self-hosted, Web
15Galileo6.8Free plan$100/moAPI, self-hosted, Web
16Helicone6.8Free plan$79/moAPI, self-hosted, Web
17HoneyHive6.8Free planFreeAPI, self-hosted, Web
18Laminar6.8Free plan$30/moAPI, self-hosted, Web
19LangSmith6.8Free plan$39/moAPI, self-hosted, Web
20LogicGaze6.8Free planFreeAPI, self-hosted, Web
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Questions about Respan (formerly Keywords AI) alternatives

What is the best alternative to Respan (formerly Keywords AI)?

PetalTrace, number 1 in AI agent observability tools with a score of 7.4 out of 10. The others here: OpenLIT, W&B Weave, SigNoz and 16 more.

What is the best free alternative to Respan (formerly Keywords AI)?

PetalTrace is the best-ranked alternative with a free plan. 20 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on.