Kairos - Open-source real-time fraud and risk decisioning platform
Show HN: Kairos – Open-source risk and fraud decisioning platform
Kairos is an open-source alternative to Sardine, Sift, Riskified, and SEON that makes real-time decisions on every sign-up, login, order, payment, and payout. It combines Grayson, a decision model that works with few labels and unstructured data, with traditional ML like logistic regression and XGBoost. What sets Kairos apart is its agent-first design: connect Claude Code, Cursor, or Codex via MCP, and your coding agent tunes the system, designs experiments, and ships winning models. With SDKs for TypeScript and Python, a CLI, and Docker self-hosting, Kairos gives developers a powerful, transparent fraud-fighting toolkit.
Your coding agent tunes it, and decision models catch fraud before you have the labels to train on.
- tensegrist
this is a new one
- edude03
Not something I need but super cool that this is both open source and shows the realtime flow.
- Messier43
There's a meta linux distribution with that name already :(