Aider vs Windsurf

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

What people use each for

The jobs each tool is most often brought in to do.

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Pricing, plan by plan

Which should you pick?

Questions people ask

Is Aider or Windsurf better?

Neither clearly leads. Aider starts at Free and Windsurf at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Aider or Windsurf?

Aider starts at Free and Windsurf at Free.

Does Aider or Windsurf run on more platforms?

Aider runs on mac, linux, windows, api. Windsurf runs on macOS, Linux, Windows.

Can I use Aider for free?

Both have a free tier, so you can try either at no cost before committing.

What is Aider best used for?

Aider is most often used for editing an existing codebase from the terminal, pairing with an llm on a new project, automating git-committed code changes, working across many programming languages. Of those, editing an existing codebase from the terminal and pairing with an llm on a new project are not what Windsurf is typically brought in for.

What can Aider do that Windsurf cannot?

Aider covers Multi-LLM support, Repository mapping, Git integration, Voice-to-code. Windsurf covers Cascade AI agent, Agentic programming, Context-aware assistance, Automated command execution.