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Aider vs Windsurf

Honest breakdown of Aider (pair-programming in your terminal. git-native, model-agnostic, oss.) and Windsurf (codeium's ai-native ide with cascade — flow-state agentic editing.). Last refreshed 2026-04-30.

Aspect Aider Windsurf
Category cli ide
Pricing Free Free + $15/mo
Open source Yes No
License Apache-2.0 Proprietary
Models
  • · claude-sonnet-4-6
  • · gpt-5
  • · deepseek-v3.5
  • · any-via-litellm
  • · claude-sonnet-4-6
  • · gpt-5
  • · windsurf-internal
Integrations
  • · LiteLLM (200+ models)
  • · Git
  • · Pre-commit
  • · MCP
  • · GitHub
  • · GitLab
  • · Bitbucket
Best for
  • · Solo devs in terminal-heavy workflows
  • · Open-source contributors
  • · Backend engineers
  • · Enterprise-grade compliance needs
  • · Teams migrating from VS Code

When to pick Aider

  • · Solo devs in terminal-heavy workflows
  • · Open-source contributors
  • · Backend engineers

When to pick Windsurf

  • · Enterprise-grade compliance needs
  • · Teams migrating from VS Code
Full Aider review → Full Windsurf review →