Best Free AI Coding Tools Every Developer Should Know in 2025

You don't need to spend money to get AI coding assistance in 2025. The free tiers have become genuinely competitive, and several fully open-source options are enterprise-grade. Here's the definitive list of free AI coding tools worth your time. Why Free AI Coding Tools Are Now Viable A year ago, free tiers of AI coding tools were crippled: limited completions, slow models, or restricted context. In 2025, competition has driven providers to offer meaningful free access. Windsurf's free tier doesn't rate-limit autocomplete. Gemini Code Assist gives you GPT-4-class suggestions for free. And open-source models like DeepSeek Coder V2 run locally with no usage caps at all. The Best Free AI Coding Tools 1. Windsurf (Free Tier) What it is: A VS Code fork with a full AI coding environment including Cascade (agentic AI) and inline completions. Free tier includes: Unlimited autocomplete (model: codeium-2) 5 Cascade (agentic) flows per month Access to GPT-4o-mini and Claude Haiku Best for: Develop