Tremor

open-source real-time seismic monitor for prediction markets, tracking ~500 active markets on Polymarket for significant price movements.

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Tremor — open-source real-time seismic monitor for prediction markets, tracking ~500 active markets on Polymarket for significant price movements.

Last verified: Feb 26, 2026

Key Facts

Classification

Stack RolesData Analytics

Geographyglobal

Product

Market TypesEvent Markets

Summary

Tremor is an open-source real-time 'seismic monitor' for prediction markets. Built by former Instacart engineer Nikshep using Claude Code and deployed via Vercel. It monitors ~500 active prediction markets on Polymarket, detecting significant price movements in real-time. Also available as a data terminal (tremor.sh) for querying millions of trades across Polymarket and Kalshi. Featured in Business Insider (Sep 2025). Community-maintained and self-hostable via GitHub.