PolySensei

Intro

PolySensei positions itself as a power-user layer for Polymarket. It is presented as a free Chrome extension that adds trading edges inside Polymarket. The extension is described as non-custodial and privacy-first; the privacy policy was last updated June 1, 2026.

Key Features

• Whale flow visibility for Polymarket markets.
• Smart-money track records to surface activity from experienced traders.
• True slippage reporting so users can see execution cost impacts.
• Fair value calculations built into market pages.
• Live scores and a scan of the exchange for potential mispricing.
• One-tap buying with zero added fees, as advertised.

All of the above features are presented on the page where users already trade and are advertised as available at no charge.

Who this is for

PolySensei targets Polymarket traders, especially power users who want data-driven edges on the Polymarket interface. Its distribution as a Chrome extension means it is aimed at browser-based traders who use Chrome. The extension is non-custodial, which indicates it does not hold user funds; it operates by augmenting the Polymarket trading experience rather than acting as a custodial wallet or exchange.

Not disclosed in the available materials are several practical details users may need before adoption: a detailed breakdown of data collected, retention periods, exact browser and OS compatibility beyond the Chrome extension label, security practices or audits, any paid tiers or limits beyond the free claim, authentication requirements, developer identity and contact/support channels, terms of service and liability statements, and whether the code is open source.