Helicone Review 2026
Build Reliable AI Apps
What is Helicone?
Helicone is an open-source AI Gateway and LLM observability platform that lets AI engineers route, monitor, debug, and analyze LLM applications with one line of code. It provides tracing, cost and latency tracking, evaluations, prompt management, caching, and automatic fallbacks.
Best for
Mixed
Use cases
- Monitor LLM apps
- Debug AI agents
- Track LLM costs
- Prompt experimentation
Key features
One-line LLM observability
AI gateway & LLM routing
Cost & latency tracking
Prompts, evals, datasets
Caching & automatic fallbacks
Pricing
Model
freemium
Price range
Generous free tier (10k requests/mo, no card); paid Team plans from $79 and $799/mo; enterprise custom; startup/open-source discounts.
Free tier
Yes
Integrations
Helicone integrates with 5 tools including:
OpenAIAnthropicPostHogLangChainMCP
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