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Tools · Comparison

Aider vs Claude Code vs Replit

All three are code assistant tools. Here is what separates them.

AiderClaude CodeReplit
What it isAn open-source pair programmer in the terminal that edits your files and commits each change to git.Anthropic’s terminal-based coding agent: it reads the repository, edits files, runs tests and commits.Build and deploy software collaboratively with the power of AI without spending a second on setup.
CategoryCode AssistantCode AssistantCode Assistant
PricingFree · Free · model API costs applyPaid · Included with Claude Pro $20/mo · Max from $100/moFreemium · $7-$20/mo
How it billsFreeBundledFlat monthly
Free tierYesNoYes
RatingNot yet ratedNot yet rated4.3 from 4,100 reviews
Features
  • Every edit becomes a git commit
  • Repository map for context selection
  • Works with most model APIs
  • Voice input
  • Runs and reads test output
  • Multi-file edits across a repository
  • Runs tests and iterates on failures
  • Git-aware, can commit and open pull requests
  • CLI, desktop, web and IDE extensions
  • Extensible with MCP servers and custom skills
  • AI Agent for full app creation
  • Ghostwriter code completion
  • Instant hosting & deploy
  • Multiplayer collaboration
  • 50+ language support
  • Built-in database
  • Version control
  • Mobile coding
What works
  • Undo is just git revert
  • No subscription beyond model costs
  • Editor-agnostic
  • Handles whole tasks rather than single lines
  • Strong at understanding an unfamiliar codebase
  • Works with any editor because it lives in the terminal
  • No setup required
  • AI builds full apps
  • Instant deployment
  • Great for beginners
  • Collaborative
What does not
  • Terminal-only, no GUI
  • You manage the API keys and costs
  • Steeper start than an editor plugin
  • Requires a paid Claude plan
  • Reviewing large diffs takes discipline
  • Token cost adds up on big repositories
  • Performance limitations
  • Limited for large projects
  • Resource constraints
  • Some features behind paywall
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