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Helicone
44
Stack Score
Editorial pick✓ Verified working
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Helicone

OSS LLM gateway + observability.

Try Helicone✓ Free trial available

Best for

Best for AI engineering teams wanting fast drop-in LLM observability.

At a glance

Pricing
freemium
Setup time
10 minutes
Learning curve
easy
Last verified
5/26/2026

What we love

  • ✓Drop-in setup is fastest in category
  • ✓Strong caching feature
  • ✓Truly OSS

Where it falls short

  • −Less feature-rich than LangSmith on evals
  • −Best on OpenAI proxy use
  • −Self-host requires ops

Pricing

✓ Pricing verified Jun 21, 2026

2 tiers

Free

$0

per month

  • ✓10K requests

Growth

$20

per month

  • ✓100K requests

Overview

Helicone is an OSS LLM observability platform — drop-in proxy or async logging, prompt + cost tracking, caching, fine-tune datasets. Self-host or cloud.

Key features

  • ●Drop-in OpenAI proxy
  • ●Prompt + cost tracking
  • ●Caching layer
  • ●Rate-limit + key mgmt
  • ●OSS self-host

Best use cases

Token + cost monitoring

Track LLM token spend + caching savings across teams.

Drop-in observability

Add observability with a one-line URL swap.

Integrations

OpenAI
Anthropic
Together
Replicate
Python
JS

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