Best AI Agent Observability Tools in 2026
Updated
32 AI agent observability tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
32ranked
2free plans on this page
$0.01/molowest paid tier
7 Oct 2026last checked
AI Agent Observability Tools, one module each. A lit port is something its maker publishes; 3 of the 7 on this page have a public API.
- 26 Amazon Bedrock Data AutomationAmazon Web Services API yesOSS not on recordFREE not on recordDOCS 6.9$0.01/mo
- 27 Observe API yesOSS not on recordFREE not on recordDOCS 6.7
- 28 Amazon Nova ReelAmazon Web Services API yesOSS not on recordFREE not on recordDOCS 6.5
- 29 TraceRoot API not on recordOSS not on recordFREE yesDOCS 5.9$30/mo
- 30 Hexel API not on recordOSS not on recordFREE not on recordDOCS 5.2Free
- 31 Kosmoy AI Observability API not on recordOSS not on recordFREE not on recordDOCS 5.0
- 32 Lunary API not on recordOSS not on recordFREE not on recordDOCS 4.8
Compare all 7 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Trace retention | Session replay |
|---|---|---|---|---|---|---|---|---|
| 26 | Amazon Bedrock Data Automation | 6.9 | No | $0.01/mo | — | — | — | — |
| 27 | Observe | 6.7 | No | — | No | — | — | — |
| 28 | Amazon Nova Reel | 6.5 | No | — | — | — | — | — |
| 29 | TraceRoot | 5.9 | Free plan | $30/mo | Yes | — | 30 days | Yes |
| 30 | Hexel | 5.2 | Free plan | Free | Yes | — | 30 days | Yes |
| 31 | Kosmoy AI Observability | 5.0 | No | — | No | — | — | Yes |
| 32 | Lunary | 4.8 | No | — | No | — | — | — |