Developers want a mature open-source pair programmer with git-native commits and pay-as-you-go model costs. This guide maps your config files, walks a 4-step migration checklist and prices the seat delta for a 10-dev team.
01Migration brief
Developers want a mature open-source pair programmer with git-native commits and pay-as-you-go model costs. Shifts from a fixed $20/mo seat to pay-as-you-go API tokens.
Claude Code
Anthropic $20 per month · FreemiumClaude Code is a terminal-native agentic coding tool that integrates directly into your development environment to plan, edit, and test code across entire repositories. It operates as an autonomous agent that can handle multi-file refactors, bug fixes, and feature implementations by reading your codebase and executing shell commands with your approval.
Aider
Aider Free open source · Open SourceAider is an AI pair programming tool that operates directly in the terminal, allowing users to edit code in local git repositories. It distinguishes itself by automatically committing changes to git with descriptive messages and utilizing a repository map to provide LLMs with relevant context without overwhelming them.
02Rules & cost
Convert Claude Code rules to the Aider format, then review the output before committing.
Shifts from a fixed $20/mo seat to pay-as-you-go API tokens.
034-step checklist
- 01
Audit & export your Claude Code rulesClaude Code reads repo-level rules from CLAUDE.md. Convert them to CONVENTIONS.md with the Rules Converter, then review the output before committing. Open →
- 02
Install & configure AiderInstall Aider with `python -m pip install aider-install && aider-install`. Aider loads conventions with `aider --read CONVENTIONS.md` (or `read:` in .aider.conf.yml). Pricing: Open Source. Open ↗
- 03
Adapt your daily workflow (CLI Agents → CLI Agents)You trade a managed subscription for a bring-your-own-key setup — configure provider credentials and watch token spend instead of seat count. Aider is best for developers comfortable with command-line workflows who want full control over model selection, git-centric history, and cost-efficient coding without subscription markups.
- 04
Run a one-week parallel pilot, then reallocate seatsShifts from a fixed $20/mo seat to pay-as-you-go API tokens. Keep Claude Code active for one sprint while Aider handles new tasks; cancel seats only after velocity holds. Open →
04Trade-offs
What you gain
- Aider is best for developers comfortable with command-line workflows who want full control over model selection, git-centric history, and cost-efficient coding without subscription markups.
- Automatic git integration and commit generation.
- Repository mapping for large-scale codebase context.
- Architect mode for splitting complex reasoning from code implementation.
What you give up
- Claude Code is positioned for solo founders, indie hackers, and developers working in real-world codebases who need help with complex, multi-file engineering tasks like refactoring and bug fixing. — confirm Aider covers that before cancelling seats.
- Aider is not ideal for users who prefer a graphical IDE interface, built-in visual diff tools, or a managed commercial product with guaranteed support and predictable flat-rate pricing.
Running both together: Running both is mostly redundant — pilot Aider on one repo for a sprint, then pick one.
05Spec sheet
| Claude Code | Aider | |
|---|---|---|
| Company | Anthropic | Aider |
| Category | Terminal & CLI Agents | Terminal & CLI Agents |
| Pricing | Freemium Included in Claude Pro ($20/mo), Max 5x ($100/mo), and Max 20x ($200/mo) subscription plans. API users are billed based on standard token consumption. | Open Source Aider is free and open-source software (Apache 2.0 license) with no subscription or per-seat fees. Users only pay the individual model providers for the API tokens consumed, or pay nothing by using local models via Ollama or LM Studio. |
| Entry paid plan | Claude Pro ($20/mo) | — |
| Rules file | CLAUDE.md | CONVENTIONS.md |
| Key features |
|
|
06FAQ
How do I convert my Claude Code rules to Aider?+
Claude Code reads CLAUDE.md and Aider reads CONVENTIONS.md. Run them through the Rules Converter (https://ai.dosa.dev/tools/rules-converter?from=claude-md&to=agents-md) and review the output before committing.
Is Aider cheaper than Claude Code?+
Claude Code starts at Claude Pro ($20/mo); Aider has no listed per-seat plan. Shifts from a fixed $20/mo seat to pay-as-you-go API tokens.
What do I lose when switching from Claude Code to Aider?+
Claude Code is positioned for solo founders, indie hackers, and developers working in real-world codebases who need help with complex, multi-file engineering tasks like refactoring and bug fixing. — confirm Aider covers that before cancelling seats. Aider is not ideal for users who prefer a graphical IDE interface, built-in visual diff tools, or a managed commercial product with guaranteed support and predictable flat-rate pricing.
Can I use Claude Code and Aider together?+
Running both is mostly redundant — pilot Aider on one repo for a sprint, then pick one.