Braintrust vs Helicone
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Freemium
An evaluation and observability platform for scoring prompts and models against datasets and monitoring production.
AI tool · Freemium
An open-source LLM observability proxy that logs requests, costs and latency with a one-line integration.
The short answer
Choose Braintrust if you need…
- Systematic evals before shipping
- Comparing prompt versions with scores
Choose Helicone if you need…
- Quick cost and usage visibility
- Caching and rate limiting LLM calls
Side-by-side
| Braintrust | Helicone | |
|---|---|---|
| Type | Prompting · Evaluation & observability | Prompting · Evaluation & observability |
| Price | Freemium | Freemium |
| Platforms | Web, API | Web, API, Self-hosted |
| Works with | OpenAI, Anthropic, Vercel | OpenAI, Anthropic |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
Braintrust
An evaluation and observability platform for scoring prompts and models against datasets and monitoring production. Fast, well-designed eval loop. Getting value means investing in good datasets and scorers.
Helicone
An open-source LLM observability proxy that logs requests, costs and latency with a one-line integration. Very easy to adopt. A proxy sits in your request path, so check reliability and data handling.
Best for
Braintrust
- Systematic evals before shipping
- Comparing prompt versions with scores
Helicone
- Quick cost and usage visibility
- Caching and rate limiting LLM calls
Strengths
Braintrust
- Experiments with scorers
- Prompt playground
- Logging and tracing
- Datasets
Helicone
- Proxy-based request logging
- Cost tracking
- Caching
- Prompt versioning
Frequently asked questions
What is the difference between Braintrust and Helicone?
Braintrust: An evaluation and observability platform for scoring prompts and models against datasets and monitoring production. Helicone: An open-source LLM observability proxy that logs requests, costs and latency with a one-line integration. Braintrust suits systematic evals before shipping, while Helicone suits quick cost and usage visibility.
Are Braintrust and Helicone free?
Braintrust: Freemium. Helicone: Freemium.
What are other alternatives to Braintrust and Helicone?
Other options people compare them with include promptfoo, W&B Weave, Langfuse, Arize Phoenix, LangSmith.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.