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Farol
AI agent observability. One decorator, that's it.
AI agents fail silently and bill loudly. Farol tells you first. Add @trace to your agent and instantly get cost anomaly detection, full trace inspector, quality scoring, regression alerts, budget limits per agent, and a weekly digest email. No gateway. No proxy. No framework lock-in. Works with Anthropic, OpenAI, Gemini, LangChain, CrewAI, and more. Free tier · Open source SDK · From €20/mo
I built Farol after noticing a gap in the market — there were no lightweight, solo-dev-friendly monitoring tools for AI agents. Everything was either enterprise-grade overkill or required complex setup.
Farol is one decorator, zero infrastructure changes, and it tells you automatically when something goes wrong — cost spikes, quality drops, latency issues.
Would love honest feedback — is this solving a real problem for you? What would you add?
About Farol on Product Hunt
“AI agent observability. One decorator, that's it.”
Farol was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #160 on the daily leaderboard. AI agents fail silently and bill loudly. Farol tells you first. Add @trace to your agent and instantly get cost anomaly detection, full trace inspector, quality scoring, regression alerts, budget limits per agent, and a weekly digest email. No gateway. No proxy. No framework lock-in. Works with Anthropic, OpenAI, Gemini, LangChain, CrewAI, and more. Free tier · Open source SDK · From €20/mo
On the analytics side, Farol competes within Open Source, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how Farol performed against the three products that launched closest to it on the same day.
Who hunted Farol?
Farol was hunted by Hugo Apolinário. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Farol including community comment highlights and product details, visit the product overview.
Hugo Apolinário
Hey Product Hunt! 👋
I built Farol after noticing a gap in the market — there were no lightweight, solo-dev-friendly monitoring tools for AI agents. Everything was either enterprise-grade overkill or required complex setup.
Farol is one decorator, zero infrastructure changes, and it tells you automatically when something goes wrong — cost spikes, quality drops, latency issues.
Would love honest feedback — is this solving a real problem for you? What would you add?