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Helicone review

Open-source LLM observability

4.7
Freemium— users
Community TrustedFree Tier
67
ToolHund Score
Solid
Verified
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Our verdict

Helicone is an open-source proxy and platform for logging, caching, rate-limiting and evaluating LLM calls.

ToolHund Score: 67/100 · Best for: Developers who want per-request LLM logging, caching and cost tracking in minutes.

Skip it if: Teams needing deep eval pipelines (pair with LangSmith).

Independently reviewed by ToolHund editors · Last verified 2026-07-26. How we score →

Strengths
  • Request logging
  • Strong fit for developers who want per-request llm logging, caching and cost tracking in minutes.
  • Real free plan you can ship work with
Weaknesses
  • Advanced features may require a higher tier
  • Output quality varies with prompt skill
  • Limited offline use — internet required

Who should choose Helicone?

Developers who want per-request LLM logging, caching and cost tracking in minutes. The strongest fit is a buyer who will use Helicone regularly for data work rather than as an occasional experiment.

Helicone earns its place in a workflow when Request logging, Caching, Rate limiting remove a repeated manual step. Its free access makes a real-workflow test possible before committing to a paid plan.

A practical three-step test

  1. STEP 1Run one real data task from your current workflow in Helicone.
  2. STEP 2Check whether Request logging produces an output you can use without substantial rework.
  3. STEP 3Compare the result and time saved with at least one alternative before choosing a paid plan.

Pricing

Free · Pro from $20/mo
Strong — free plan covers most casual use, paid unlocks pro workflows

Buying checklist

  • Use-case fit: Developers who want per-request LLM logging, caching and cost tracking in minutes.
  • Core capabilities: Request logging, Caching, Rate limiting
  • Current listed pricing: Free · Pro from $20/mo
  • Reason to skip: Teams needing deep eval pipelines (pair with LangSmith).

Helicone is most compelling for developers who want per-request llm logging, caching and cost tracking in minutes. Start with the free option and upgrade only after it proves useful on a real task.

Features

  • Request logging
  • Caching
  • Rate limiting
  • Cost tracking

Helicone vs top alternatives

ToolToolHund ScorePricingFree tierRating
Helicone67/100Free · Pro from $20/moYes4.7/5
Julius AI84/100Free · Basic $20/moNo4.7/5
Hex Magic81/100Free · Team $24/mo per userNo4.7/5
Pinecone64/100Free starter · Standard usage-basedYes4.7/5
Julius AI
Chat with your spreadsheets
Hex Magic
AI-native data notebooks
Pinecone
Managed vector database
Weaviate
Open-source vector database

See all Helicone alternatives →

Helicone FAQ

What is Helicone?

Open-source LLM observability Helicone is an open-source proxy and platform for logging, caching, rate-limiting and evaluating LLM calls.

Is Helicone free?

Yes — Helicone offers a free tier or free trial. Current pricing: Free · Pro from $20/mo.

How much does Helicone cost?

Helicone pricing: Free · Pro from $20/mo. See the ToolHund review for plan details and value analysis.

What is Helicone best for?

Developers who want per-request LLM logging, caching and cost tracking in minutes..

What are the best Helicone alternatives?

The closest alternatives in the Data category are Julius AI, Hex Magic, Pinecone.

How does ToolHund score Helicone?

Helicone scores 67/100 on the ToolHund rubric, which weighs capability, pricing honesty, traction and ecosystem.

Read the ToolHund scoring methodology →