Open source
Open-source AI coding agent for the terminal that works with many model providers.
Aider
Open-source AI pair programmer that edits code in your git repo from the terminal.
What is Aider?
Aider is a free, open-source command-line tool for pair programming with large language models. You add files to the session, describe the change you want, and Aider edits the code and commits it to git with a descriptive message, so every AI change is easy to review or roll back. It builds a map of your whole repository to give the model useful context and works with many hosted and local models, so you only pay for the model you choose. It also supports voice input and automatic linting and testing. It is popular with developers who prefer transparent, keyboard-driven workflows.
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Aider alternatives & related tools
Paid
Anthropic's agentic coding tool that works in your terminal, IDE and the web.
Open source
Google's open-source AI agent that brings Gemini into your terminal.
Freemium
Frontier coding agent and dev environment that runs on your machine or unattended in the cloud.