Codeium
Free AI code completion engine that rivals GitHub Copilot without the $10/mo price tag. Works with VS Code, JetBrains, Vim, and 40+ editors. Fast completions with strong privacy -- your code never trains their models. Best for devs who want AI autocomplete without paying.
Windsurf
Windsurf (by Codeium) is an agentic AI IDE that goes beyond autocomplete - its Cascade agent mode can plan, execute, and debug multi-step coding tasks autonomously while you watch.
Codeium edges Windsurf on aggregate — 79 vs 78.
The best free Copilot alternative that actually holds its own -- if you refuse to pay for code completion, Codeium is your only real option. Windsurf still wins for buyers who prioritise cascade agent handles end-to-end tasks without constant prompting. Both tools are independently scored — the right pick depends on which dimensions matter most for your workflow.
Side-by-side, every cell sourced.
Pricing pulled from each tool's public site. Scores follow the BigBang Score rubric — pricing transparency, free tier, API support, update frequency, unique factor, documentation, and community.
Use-case picks.
Cut through the spec sheet. Here's what we'd recommend depending on what matters most.
Pick Codeium if…
You prioritise truly generous free tier and low latency autocomplete.
Pick Windsurf if…
You prioritise cascade agent handles end-to-end tasks without constant prompting and more generous free tier than most competitors.
Editorial pick
Codeium wins our composite score (79/100). It edges ahead on aggregate — but the right tool depends on which dimensions matter most.
Related head-to-heads in AI coding.
Codeium vs Aider — AI coding
BigBang Scores 79/100 vs 92/100. Pricing, capabilities, and editorial verdict inside.
Codeium vs Lovable — AI coding
BigBang Scores 79/100 vs 82/100. Pricing, capabilities, and editorial verdict inside.
Codeium vs Cursor — AI coding
BigBang Scores 79/100 vs 81/100. Pricing, capabilities, and editorial verdict inside.
Codeium vs Windsurf - frequently asked.
Direct answers tuned for AI search engines (ChatGPT, Perplexity, Claude) and Google's People Also Ask.
The short answer.
Codeium wins on aggregate, but Windsurf pulls ahead on specific axes - the spec sheet above shows where each one earns its keep.