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, 9.2/10
Every tool we cover
Price tracker →| Tool | Score | From | Top listed plan | Free plan | Trial | Pages |
|---|---|---|---|---|---|---|
 OpenLITOpenLIT | 7.4 | Free* | — | Yes | — | ReviewAlternatives |
 HoneyHiveHoneyHive | 7.2 | Free* | — | Yes | — | Review |
 AgentaAgenta | 6.5 | $29/mo | $299/mo | Yes | — | Review |
 CovalCoval | 6.5 | $80/mo | $4,500/mo | No | 7 days | Review |
 HeliconeHelicone | 6.2 | $79/mo | $799/mo | Yes | 7 days | ReviewPricingAlternatives |
* 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
Free and broad on paper, but self-hosting is the clear trade-off and hosted pricing is still unknown.
HoneyHiveHoneyHive
Strong evaluation coverage, but check the event cap and get an Enterprise quote before switching.
AgentaAgenta
Choose Agenta to build and run AI coworkers—not to replace an AI observability stack.
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 6, 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 7.4/10. Free and broad on paper, but self-hosting is the clear trade-off and hosted pricing is still unknown.