Category · 5 tools · 3 comparisons
AI observability platforms
Monitor, evaluate, and improve LLM applications and AI agents in production.
At a glance
- Tools tracked
- 5
- Entry plans
- $29–$80/mo
- Typical entry plan
- $79/mo
- Free plan
- 4 of 5
- Cheapest paid
- Agenta, $29/mo
- Best value score
- OpenLIT, 9/10
Every tool we cover
API pricing →| Tool | Score | From | Top listed plan | Free plan | Trial | Pages |
|---|---|---|---|---|---|---|
 OpenLITOpenLIT | 7.7 | Free* | — | Yes | — | ReviewAlternatives |
 HoneyHiveHoneyHive | 7.4 | Free* | — | Yes | — | Review |
 AgentaAgenta | 7.1 | $29/mo | $299/mo | Yes | — | Review |
 HeliconeHelicone | 6.8 | $79/mo | $799/mo | Yes | 7 days | ReviewPricingAlternatives |
 CovalCoval | 6.8 | $80/mo | $4,500/mo | No | 7 days | Review |
* Lower confidence: the vendor's pricing page couldn't be read directly or didn't list every price, so the figure was compiled from other public sources and may be incomplete. Check the vendor's page before you buy.
Head-to-head
Highest scored
OpenLITOpenLIT
OpenTelemetry-native agent observability with a free, Apache 2.0 self-hosted edition.
HoneyHiveHoneyHive
Strong agent tracing and evaluation, with integration details and production costs to confirm.
AgentaAgenta
A self-hostable AI coworker platform with useful integrations, but limited published developer-interface detail.
AI observability platforms: quick answers
How much do AI observability platforms cost?
Paid plans for the 5 AI observability platforms we track start between $29 and $80 a month, and the typical entry plan is about $79 a month. 4 of them have a free plan. Prices are the vendors' own, checked Nov 10, 2026; most quote the per-month price when billed annually.
Which AI observability platform is the cheapest?
Which AI observability platforms have a free plan?
Which AI observability platform scores highest in our reviews?
OpenLIT scores highest at 7.7/10. OpenTelemetry-native agent observability with a free, Apache 2.0 self-hosted edition.