Comparison

Helicone vs OpenLLMetry

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

OpenLLMetry

OpenTelemetry instrumentation for LLMs.

+ Vendor-neutral instrumentation
+ Works with existing observability stacks
− Instrumentation only, no UI
− Needs a backend like SigNoz or Honeycomb

Spec	Helicone	OpenLLMetry
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	free
Starting price	Free tier	Free
Models	multi	multi
Languages	typescript	python, typescript
GitHub stars	5.9k	7.2k
Last activity	2026-06-11	2026-06-25