What are the best AI coding assistants?

The best overall AI coding assistant is Cursor — it combines a full-featured VS Code-based editor with agentic AI that can plan, write, and test code across your entire codebase. For developers who want to stay in their existing editor, GitHub Copilot is the most widely adopted choice, with a generous free tier and tight IDE integration. If you live in the terminal and want an autonomous agent that can read files, run shell commands, and manage git, Claude Code is the standout pick.

Top picks

Cursor — best for agentic, full-codebase development

Cursor is an AI-first code editor built on VS Code that gives AI full context over your entire project — not just the open file. Its autonomous agents can plan features, write code, run tests, and demo results with minimal hand-holding. It supports multiple frontier models (OpenAI, Anthropic, Gemini, Grok) and is SOC 2 and ISO 27001 certified for teams with security requirements. Pricing starts free (Hobby), with Pro at $20/mo and Teams at $40/user/mo.

GitHub Copilot — best for inline autocomplete in any editor

GitHub Copilot is the most widely used AI coding assistant, trusted by millions of developers. It suggests completions as you type, answers questions in plain language, and handles multi-step tasks — all inside the editors you already use. The free tier includes 2,000 completions per month, with paid plans from $10/user/mo (Pro) up to $39/user/mo (Enterprise) for advanced features and SSO.

Claude Code — best for terminal-native autonomous coding

Claude Code is Anthropic's agentic coding assistant that lives entirely in your terminal. It can read and edit files, run shell commands, manage git workflows, and complete multi-step engineering tasks autonomously. It's powered by Claude's reasoning models and is ideal for developers who prefer command-line workflows over GUI editors. It has a free tier, with usage billed via Anthropic's API.

Windsurf — best for multi-agent orchestration

Windsurf is an AI-powered IDE from Codeium built around its Cascade agent, which handles multi-file tasks end to end. It features "Fast Context" for instant codebase search, Supercomplete next-thought prediction, and a Kanban view for managing multiple agents in parallel. The free tier offers unlimited inline edits and Tab completions, with Pro at $20/mo adding frontier model access and cloud agents.

Kilo Code — best for cost-conscious developers who want model flexibility

Kilo Code is a fully open-source (MIT licensed) AI coding assistant that runs inside VS Code, JetBrains, and CLI environments. Its key differentiator is access to 500+ models across 60+ providers with zero markup — you can use free models, bring your own API keys, or pay only for what you use. Teams plans start at $15/user/mo, and it supports local models via Ollama and LM Studio.

Cody — best for large, multi-repository codebases

Cody by Sourcegraph uses its powerful Search API to pull deep context from both local and remote codebases, including APIs, symbols, and usage patterns. This makes it especially strong for navigating and contributing to large or unfamiliar projects. It supports VS Code, JetBrains, Visual Studio, and the Sourcegraph web app, with a free tier and self-hostable enterprise options.

Tabnine — best for privacy-first enterprise teams

Tabnine is designed for enterprises that can't send code to the cloud. It runs locally or on a private cloud with no data retention, covering 190+ programming languages and technologies. It includes agentic quality engineering features like automated test creation and governance controls. A free tier is available, with paid plans starting at $12/mo.

Replit AI — best for beginners and no-setup app building

Replit AI lets you describe an app in plain English and have it built, hosted, and deployed — entirely in the browser with no installation required. It's the best pick for non-technical users, founders, and students who want to go from idea to working app quickly. The free Starter tier is $0, with Core at $18/mo (billed annually).

Comparison table

Tool	Best for	Free tier	Starting price
Cursor	Agentic full-codebase editing	✅	$20/mo
GitHub Copilot	Inline autocomplete in any editor	✅	$0/mo
Claude Code	Terminal-native autonomous coding	✅	—
Windsurf	Multi-agent orchestration	✅	$20/mo
Kilo Code	Model flexibility, cost control	✅	$15/mo
Cody	Large / multi-repo codebases	✅	—
Tabnine	Privacy-first enterprise teams	✅	$12/mo
Replit AI	No-setup app building for beginners	✅	$18/mo

How to choose

• You want the most powerful agentic editor: Go with Cursor — it has the deepest codebase context, multi-model support, and autonomous agents that can handle ambitious tasks end to end.
• You want to stay in your current editor with minimal friction: GitHub Copilot integrates everywhere and has the largest community; it's the lowest-effort way to add AI to your existing workflow.
• You work heavily in the terminal and want full autonomy: Claude Code is purpose-built for this — it runs shell commands, edits files, and manages git without switching to a GUI.
• Your team has strict data privacy requirements: Tabnine is the safest choice with local or private cloud deployment and no data retention.
• You're a beginner or non-technical builder: Replit AI removes all setup friction — just describe what you want and it builds, hosts, and runs the app for you in the browser.