Inferse
For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
List your platform
Vendor dashboard

Best Respan (formerly Keywords AI) Alternatives in 2026

Updated

20 platforms 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
    Traccia Free plan apiWeb $99/mo7.4
    Respan (formerly Keywords AI) vs Traccia
  3. 3
    Agenta Free plan apiself-hostedWeb $29/mo7.3
    Respan (formerly Keywords AI) vs Agenta
  4. 4
    Arize AX Free plan apiself-hostedWeb $50/mo7.3
    Respan (formerly Keywords AI) vs Arize AX
  5. 5
    Braintrust Free plan apiself-hostedWeb $249/mo7.3
    Respan (formerly Keywords AI) vs Braintrust
  6. 6
    Fiddler AI Free plan apiself-hostedWeb Free7.3
    Respan (formerly Keywords AI) vs Fiddler AI
  7. 7
    Galileo Free plan apiself-hostedWeb $100/mo7.3
    Respan (formerly Keywords AI) vs Galileo
  8. 8
    Helicone Free plan apiself-hostedWeb $79/mo7.3
    Respan (formerly Keywords AI) vs Helicone
  9. 9
    Hexel Free plan api Free7.3
    Respan (formerly Keywords AI) vs Hexel
  10. 10
    Laminar Free plan apiself-hostedWeb $30/mo7.3
    Respan (formerly Keywords AI) vs Laminar
  11. 11
    Langfuse Free plan apiself-hostedWeb $29/mo7.3
    Respan (formerly Keywords AI) vs Langfuse
  12. 12
    LangSmith Free plan apiself-hostedWeb $39/mo7.3
    Respan (formerly Keywords AI) vs LangSmith
  13. 13
    LangWatch Free plan apiLinuxself-hostedWeb €29/mo7.3
    Respan (formerly Keywords AI) vs LangWatch
  14. 14
    LogicGaze Free plan apiself-hostedWeb Free7.3
    Respan (formerly Keywords AI) vs LogicGaze
  15. 15
    Maxim AI Free plan apiself-hostedWeb $29/mo7.3
    Respan (formerly Keywords AI) vs Maxim AI
  16. 16
    MLflow Tracing Free plan apiself-hostedWeb Free7.3
    Respan (formerly Keywords AI) vs MLflow Tracing
  17. 17
    OpenLIT Free plan apiLinuxMacself-hostedWeb Free7.3
    Respan (formerly Keywords AI) vs OpenLIT
  18. 18
    Opik Free plan apiLinuxself-hostedWeb $19/mo7.3
    Respan (formerly Keywords AI) vs Opik
  19. 20
    SigNoz Free plan AndroidapiiOSself-hostedWeb $19/mo7.3
    Respan (formerly Keywords AI) vs SigNoz
  20. 21
    Traceloop Free plan apiself-hostedWeb Free7.3
    Respan (formerly Keywords AI) vs Traceloop

Respan (formerly Keywords AI) alternatives compared

#PlatformScoreFree planFromRuns on
1PetalTrace7.4Free planFreeAPI, Linux, Mac, self-hosted, Web, Windows
2Traccia7.4Free plan$99/moAPI, Web
3Agenta7.3Free plan$29/moAPI, self-hosted, Web
4Arize AX7.3Free plan$50/moAPI, self-hosted, Web
5Braintrust7.3Free plan$249/moAPI, self-hosted, Web
6Fiddler AI7.3Free planFreeAPI, self-hosted, Web
7Galileo7.3Free plan$100/moAPI, self-hosted, Web
8Helicone7.3Free plan$79/moAPI, self-hosted, Web
9Hexel7.3Free planFreeAPI
10Laminar7.3Free plan$30/moAPI, self-hosted, Web
11Langfuse7.3Free plan$29/moAPI, self-hosted, Web
12LangSmith7.3Free plan$39/moAPI, self-hosted, Web
13LangWatch7.3Free plan€29/moAPI, Linux, self-hosted, Web
14LogicGaze7.3Free planFreeAPI, self-hosted, Web
15Maxim AI7.3Free plan$29/moAPI, self-hosted, Web
16MLflow Tracing7.3Free planFreeAPI, self-hosted, Web
17OpenLIT7.3Free planFreeAPI, Linux, Mac, self-hosted, Web, Windows
18Opik7.3Free plan$19/moAPI, Linux, self-hosted, Web
20SigNoz7.3Free plan$19/moAndroid, API, iOS, self-hosted, Web
21Traceloop7.3Free planFreeAPI, self-hosted, Web
Make your platform an alternative to Respan (formerly Keywords AI)

The sponsored alternative slot on this page is labelled Sponsored.

See the price

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: Traccia, Agenta, Arize AX 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, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.