Helicone

Open-source observability for LLM apps. Helicone competes in the AI Model Training category, where our editors have reviewed 294 tools so far. It has been bookmarked by 1,500 readers, making it one of the most trusted options in its class. This in-depth review breaks down exactly where Helicone shines, where it falls short, and who should choose it.

In real-world use, Helicone's clearest strengths are One-line integration; Cost and usage tracking; Open source. These advantages matter most for Monitoring LLM usage|Tracking AI costs|Caching responses|Running experiments|Rate-limiting models — the exact workload Helicone was designed around. Readers who prioritise these qualities consistently rank it among their favourites in AI Model Training.

No tool is perfect — before you commit, weigh Advanced analytics need paid tiers; Proxy adds slight latency. Helicone pricing starts at $20 per month. Always confirm the latest plans on the official website, because prices change often. Because you can evaluate the full experience free of charge, Helicone is a low-risk tool to try this week. Helicone is a solid, well-reviewed choice in AI Model Training and deserves a place on your shortlist.