There is no single best AI coding tool — the right pick depends on how you work. For agentic, multi-file editing inside a real codebase, Cursor is the reference point. If you want AI inside the IDE you already use, GitHub Copilot is the safe default for an individual developer; Gemini Code Assist is worth a look only if your organisation builds on Google Cloud, because Google retired its individual tier and now ships Code Assist in Standard and Enterprise editions only (our rundown of discontinued AI tools in 2026 has the dates). To go from a prompt to a working app, Bolt.new, v0, and Replit are purpose-built.
It helps to think in three modes. Autocomplete tools (Tabnine, Copilot's inline completions) finish your lines as you type — fast and low-friction. Agentic editors (Cursor, Copilot's agent mode) take a task and make multi-file changes for your review. App builders (Bolt.new, v0, Replit) scaffold whole projects from a description. Most professional developers end up pairing a fast autocomplete with one agentic editor; the app builders shine for prototypes and front-end work.
Cost and privacy pull in opposite directions, so treat them as separate questions. On cost, Aider is free and open source if you bring your own API key, and GitHub Copilot's Free plan starts at $0 with no credit card. On privacy, local runners like Ollama keep code on your own machine at no cost, while Tabnine sells the same guarantee as governed, on-premises software — but Tabnine's pricing link now goes to a contact-sales page with no public price we could verify, so it is a procurement decision rather than something you try over lunch. For teams, the per-seat math matters more than the headline price. The comparison table and full breakdowns below cover each tool's strengths, pricing, and who it's for.