Codeium vs MutableAI

Side-by-side from the Top 11 ranking of The 11 Best AI Coding Assistants (2026). Last verified May 31, 2026.

The short answer

Codeium ranks higher on Top 11 (#5 vs #10) for Software engineers and engineering leaders choosing AI pair-programmers. A fast, feature-rich, and high-quality free alternative to Copilot.

At a glance

CodeiumMutableAI
Top 11 rank#5 / The 11 Best AI Coding Assistants (2026)#10 / The 11 Best AI Coding Assistants (2026)
Score (out of 9.4)8.37.3
Best forBest free alternativeBest for code refactoring
Pricing$ ($0 to custom/mo)$$ ($25 to custom/mo)
HQMountain View, USANew York, USA
Founded20212021

Codeium

A fast, feature-rich, and high-quality free alternative to Copilot.

codeium.com

See full entry in The 11 Best AI Coding Assistants (2026)

MutableAI

A specialized tool for AI-powered refactoring and modernizing legacy code.

mutable.ai

See full entry in The 11 Best AI Coding Assistants (2026)

Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.