Research

Original research from the Foil team on device intelligence, bot and AI-agent detection, and the stealth-browser economy.

  1. Tearing down four AI stealth browsers

    June 1, 2026Alain MeierAI agents have created demand for stealth browsers, which are browsers modified to hide automation. We reviewed the source code of four of them.Read the piece

  2. The stealth browser benchmark

    October 3, 2026Alain MeierWe tested the most popular commercial anti-detect and automation browsers on the same Foil-protected signup flow and compared the results.Read the piece