Oakmate

Oakmate is a free Chrome extension that brings unlimited chess game review directly to Chess.com and Lichess. Install it, finish a game, and a popup gives you a full Stockfish-powered breakdown without leaving the site or hitting a paywall.

The review covers move classification (blunders, mistakes, inaccuracies, best moves), best-move comparison for every position, Elo and accuracy estimates, opening stats, and a time-vs-accuracy graph that shows how your clock usage affected your play quality. One standout feature is retryable continuations, which let you replay positions from your blunders and practice the right moves. Oakmate also generates targeted puzzles from your own mistakes, turning your game history into personalized training material.

The core tool is free. A forthcoming Pro plan will add AI Coach explanations, auto-generated end-of-game puzzles, cloud analysis for faster processing, and progression insights over time. As of early 2026, the extension holds a perfect 5.00 rating on the Chrome Web Store. It is a clean, focused tool built for players who want real post-game analysis without a subscription.