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Tools · Comparison

Aider vs Codeium vs Replit

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

AiderCodeiumReplit
What it isAn open-source pair programmer in the terminal that edits your files and commits each change to git.Manage fleets of local and cloud agents from one surface. Plan, delegate, review, and ship without leaving your editor.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 applyFree · FreeFreemium · $7-$20/mo
How it billsFreeFreeFlat monthly
Free tierYesYesYes
RatingNot yet rated4.2 from 2,200 reviews4.3 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
  • Free code completion
  • 70+ language support
  • All major IDE support
  • AI chat
  • Code search
  • In-line suggestions
  • Custom commands
  • Repository context
  • 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
  • Completely free for individuals
  • Wide language support
  • Supports all IDEs
  • Fast completions
  • No code upload
  • 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
  • Less capable than Copilot
  • Occasional irrelevant suggestions
  • Rebranding confusion
  • Limited enterprise features
  • Performance limitations
  • Limited for large projects
  • Resource constraints
  • Some features behind paywall
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