Free AI Coding Tools That Replace Paid Alternatives in 2025

The AI developer tools landscape has a dirty secret: many expensive paid tools have free or open-source alternatives that are nearly as good. Meanwhile, some paid tools really do justify their cost — and knowing the difference matters when you're deciding what to pay for. This guide covers the best free AI coding tools, what they actually replace, and where the paid alternatives genuinely outperform them. Free AI Code Assistants Continue.dev — Replaces GitHub Copilot GitHub Copilot costs : $10/month individual, $19/month business Continue.dev costs : Free (you pay API costs only, or run locally for free) Continue.dev is an open-source AI code assistant that works as a VS Code or JetBrains plugin. You configure it to use whatever model you want — including locally-running models via Ollama. Free setup with a local model : # Install Ollama (local AI runner) curl -fsSL https://ollama.ai/install.sh | sh # Pull a coding-focused model ollama pull deepseek-coder:6.7b # Good balance of quality