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Helicone

Helicone is an open-source AI gateway and LLM observability platform from the YC W23 batch. You send model calls through its OpenAI-compatible gateway, and it logs each request so you can debug and analyse it.

Visit Helicone →
Type
LLM Observability & Evaluation

By Egor Burlakov · Edited · Source dates below

Buying snapshot

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Decision pointWhat Helicone states

Licence

Apache v2.0

Deployment

Hosted service; self-host with Docker Compose; a production Helm chart for Enterprise workloads through enterprise@helicone.ai; on-prem deployment on Enterprise

Integration

Change the baseURL to https://ai-gateway.helicone.ai and add a Helicone API key; async logging (OpenLLMetry) for JS/TS and Python

Data retention

7 days (Hobby), 1 month (Pro), 3 months (Team), Forever (Enterprise)

Ingestion limit

10 logs/min (Hobby), 1,000 (Pro), 15,000 (Team), 30,000 (Enterprise)

Compliance

README: SOC 2 and GDPR compliant. SOC-2 and HIPAA compliance listed from the Team plan

Our take

If your app already calls models through an OpenAI-compatible client and you want request logs and cost tracking without writing instrumentation, Helicone is a strong first pick, and the Apache 2.0 licence keeps self-hosting open. If you need on-prem with vendor support, budget for an Enterprise conversation from the start.

Evaluate Helicone

Where it stands out

  • Small first step. The quick start is a baseURL change plus an API key in your existing OpenAI client. Helicone calls it one line of code, and there is no tracing code to write before you see logs.

  • Gateway and observability in one product. The gateway reaches 100+ models with one API key, with intelligent routing and automatic fallbacks. The same requests feed traces, sessions and cost and latency tracking.

  • Prompts beyond logging. Helicone versions prompts using production data and deploys them through the AI Gateway without code changes. It also offers a playground and fine-tuning through partners OpenPipe or Autonomi.

  • Your data stays reachable. You can export metrics to PostHog in one line, and manage and export data with the Helicone API or an MCP server. Helicone also runs an open-source LLM Cost API with 300+ models and providers.

Product screenshot

Helicone product interface
Product UI source · Verified

Trade-offs to weigh

  • The gateway sits in your request path. The quick start sends traffic through ai-gateway.helicone.ai, so its availability matters to your app. If that is a problem, the async logging integration logs out of band, but it is a separate integration.

  • Self-hosting is several services. The stack includes a NextJS web app, a proxy worker, the Jawn log server, Supabase, ClickHouse and Minio. Manual deployment is not recommended, and the production Helm chart comes through the enterprise contact.

  • Ownership news is pending. Helicone's site says: "Helicone is no longer part of Mintlify. Details to come soon." Ask about the roadmap and contract terms before a long commitment.

  • A large step between Pro and Team. No plan sits between Pro and Team. Check whether you need SOC-2 and HIPAA compliance, more organizations or longer retention before you move up.

Pricing and plan conditions

Helicone bills a plan fee plus usage. Each paid plan includes 10K free requests and 1 GB free storage, then usage-based charges apply above that. Pro starts with a 7-day free trial. Self-hosting under the Apache 2.0 licence has no plan fee; you run the services yourself.

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Helicone cloud plans as shown on its pricing page

PlanPublished priceWhat it adds

Hobby

Free

10,000 free requests, 1 GB storage, 1 seat, 1 organization

Pro

$79 per month

Everything in Hobby, plus unlimited seats, alerts and reports, HQL (query language). Usage-based pricing applies

Team

$799 per month

Everything in Pro, plus 5 organizations, SOC-2 and HIPAA compliance, a dedicated Slack channel. Usage-based pricing applies

Enterprise

Contact us

Custom-built packages. Everything in Team, plus a custom MSA, SAML SSO, on-prem deployment, bulk cloud discounts

Discounts on application: startups under 2 years old and $5M in funding get 50% off the first year. Open-source companies get a $100 credit for the first year. Non-profits get discounts depending on org size, and most students and educators use it free.

Public signals

About these signals

Verified factual signals from public sources. They indicate observable activity or interest, not total adoption, product quality, or cost.

14 GitHub commits 90d6.3k GitHub stars0 vulnerabilities across 2 packages

See all signals from 5 sources
Source
Signals
Last updated
GitHub
Commits 90d:14Stars:6.3k↑22
November 9, 2026
PyPI
Weekly downloads:191↑27
November 9, 2026
npm
Weekly downloads:8.3k↑502
November 9, 2026
Product Hunt
Comments:163Rating:5.0/5Reviews:13Votes:790
November 9, 2026
OSV
Package vulnerabilities:0 vulnerabilitiesacross 2 packages

npm · @helicone/helpers@1.8.3 · PyPI · helicone@1.0.14

November 9, 2026

Alternatives

Helicone's pricing page compares it with LangSmith, Braintrust, Arize AI and Langfuse. On LangSmith, Helicone's own short answer is that it "gives you more provider flexibility, is open-source, and scales more cost-effectively." That is the vendor's view, so run the same traces through each candidate before you choose.

Alternatives to Helicone

The reviewed substitutes for Helicone among the LLM observability & evaluation, and what would make each one the better answer.

Direct alternatives

Reviewed substitutes: products bought for the same job, where a team picks one.

Arize Phoenix
Both are open LLM observability tools a team runs itself. Helicone integrates as a proxy and Phoenix through OpenTelemetry, but the purchase decision is one or the other.
Braintrust
Both are LLM observability platforms with free tiers, bought for visibility into AI application behaviour and cost.
Langfuse
Both are open-source LLM observability platforms with a hosted tier, bought to see and cost AI requests.

Other approaches

A different approach to the same problem. Each substitutes only for the workload named beside it.

LiteLLM
Helicone's proxy and LiteLLM's gateway both sit in front of model providers, but Helicone is bought for observability and LiteLLM for routing and governance. They compete only for a small team that wants one service instead of two.Applies to: A single proxy providing both routing and request visibility
Explore all Helicone alternatives →

Sources