AI Agents
opik
Open-source LLM observability: trace, evaluate and monitor apps and agents
★ 22.5k starsApache-2.0
View guide →// agents · Helicone/helicone
helicone
helicone is an open-source ai agents project by Helicone (Helicone/helicone on GitHub). It has 6,207 GitHub stars and 683 forks, is released under the Apache-2.0 license, and was last updated on GitHub on 16 September 2026.
Open-source LLM observability: monitor, evaluate, and experiment.
★ 6.2k stars⑂ 683 forksApache-2.0updated 2026-09
▦ visual — this project's README ships no embeddable screenshot,
so here's a placeholder. The guide below is complete regardless.
so here's a placeholder. The guide below is complete regardless.
// project facts
Project facts
- Repository
- Helicone/helicone
- GitHub stars
- 6,207
- Forks
- 683
- License
- Apache-2.0
- Last updated on GitHub
- 16 September 2026
- Category
- AI Agents
- Listing
- Full install guide
- Official site
- Official site
// how it works
How it works
- Pick a use case
Start with one concrete task rather than a grand architecture.
- Fetch the source
Clone the repo and check the examples folder for a quickstart.
- Configure it
Install packages, set environment variables, and point it at your model.
- Run and iterate
Execute the demo workflow, then adapt it to your own data.
// features
Why people love it
One-line integration
Proxy your calls with minimal code.
Full logging
Every prompt and completion recorded.
Evaluations
Score outputs and track quality.
Experiments
A/B prompts and models.
Cost tracking
See what your agents spend.
Apache-2.0
Self-hostable and open.
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// run it
Run it yourself
- Step 1 - Clone the repo
Download the source and move into the project folder.
git clone https://github.com/Helicone/helicone.git cd helicone - Step 2 - Install dependencies
Pull in the Node packages the project needs.
npm install - Step 3 - Build or run it
Treat these as starting points - the README documents the exact commands.
npm run build
// use cases
What you can build
- Monitor a production chatbot's prompts and costs.
- Evaluate agent output quality over time.
- Debug a misbehaving agent from its trace.
- Compare two models on the same workload.
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// faq
Questions, answered
Who maintains this project?
Helicone/helicone is its home on GitHub, with 683 forks so far. The contributors tab and recent commits show how actively it is maintained.
Is helicone free to use?
Yes - it is Apache-2.0 licensed, so it is free for commercial use with attribution.
Do I need a paid API to use it?
Self-hosting is free and open source; the hosted cloud version may have a paid tier.
Helicone vs Weave?
Both observe LLM apps. Helicone is a proxy-based observability platform; Weave is a dev toolkit from the Weights & Biases team. Try Helicone for drop-in monitoring, Weave for deeper experiment tracking.
How do I get started?
Follow the README quickstart, then browse the examples directory for patterns that match what you want to build.
// keep exploring
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// more in agents
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Get helicone
Free and open — grab the source, star the repo, and start creating.