Helicone

One-line LLM observability proxy.

Evals Apache-2.0 Open source Checked 2026-08-15

The record

Verified by hand

Category: Evals
License: Apache-2.0
Open source: Yes
Self-host: Yes

Entry price: Free
Rank in category: #7 of 11
Website: www.helicone.ai
Price check: Compiled — verification pending

Our take

In progress

Helicone sits at #7 in Evals by adoption. The verified facts are above; the full editorial assessment — where it wins, where it doesn't, and what to reach for instead — is being written and will land here.

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Alternatives in Evals

Ranked

LangSmith#1

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Langfuse#2

Open-source tracing + evals.

$29/moMIT

Promptfoo#3

CI-gated eval + red-teaming (OpenAI).

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Braintrust#4

The production quality loop, flat rate.

$249/moProprietary

Sources

Checked 2026-08-15

Official sitewww.helicone.aiPending