A agentindex
Comparison

Helicone vs Comet Opik

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

Helicone

Proxy-based LLM observability with instant cost tracking.

  • + Fastest setup via a drop-in proxy
  • + Automatic cost and rate-limit tracking
  • − Eval features lighter than competitors
  • − Proxy model adds a hop

Comet Opik

Open-source eval and tracing from Comet.

  • + Open source with self-host option
  • + Backed by Comet's MLOps experience
  • − Smaller community than Langfuse
  • − UI less polished than paid rivals
Spec Helicone Comet Opik
Category eval-observability eval-observability
License Apache-2.0 Apache-2.0
Open source Yes Yes
Self-hostable Yes Yes
MCP support No No
Pricing freemium freemium
Starting price Free tier Self-host free
Models multi multi
Languages typescript python, typescript
GitHub stars 5.9k 19.8k
Last activity 2026-06-11 2026-06-25