Best Factory AI Alternatives — 10 Compared, With Free Tools (2026)

What is Aider?

Aider is an open-source AI pair programming tool that runs in the terminal and connects to your existing codebase. It uses large language models (Claude, GPT-4, Gemini, and others) to understand repo-level context, make multi-file edits, run tests, and commit changes to Git automatically. ...

What is Replit?

Replit is the ultimate platform for software development. With Replit, you can effortlessly code and host web and mobile apps, APIs, and other applications. Enjoy automatic hosting, making it easy to share live app links with clients and internal teams. Collaborate seamlessly through live chat, ...

What is Zed?

Zed is a code editor written in Rust with an emphasis on responsiveness, GPU-accelerated rendering and native multiplayer collaboration. Its agent panel supports multi-file agentic edits with a choice of model providers, and edits are reviewable as a diff before being applied. It is an editor ...

What is OpenHands?

OpenHands, formerly OpenDevin, is an open-source platform for agents that develop software the way a developer does — writing code, running commands, browsing documentation and executing tests inside a sandboxed environment. It can be self-hosted, which matters for organisations that will not ...

What is Amp?

Amp is Sourcegraph's agentic coding tool, available in the terminal and as an editor extension. Its stated design position is to spend tokens freely rather than optimise for cost, on the argument that model capability improves faster than prices fall, so restricting context is a false economy. ...

What is Devin?

Devin is an autonomous coding agent built by Cognition that plans and executes multi-step software engineering tasks with minimal human supervision. It works in a sandboxed cloud environment where it can browse documentation, write and edit code across multiple files, run and debug tests, and ...

What is OpenAI Codex?

Codex is OpenAI's software engineering agent, running tasks in isolated cloud sandboxes with the repository loaded so several pieces of work can proceed in parallel. It writes code, runs tests and opens pull requests, reporting back with the diff and the commands it executed. The ...

What is Claude Code?

Claude Code is Anthropic's agentic coding tool, operating in the terminal and in IDE extensions with direct access to the filesystem, shell and version control. It reads a codebase to build context, makes multi-file edits, runs tests and iterates on failures, and can be extended through MCP ...

What is Augment Code?

Augment Code provides autonomous coding agents, coordinated through its Cosmos orchestration platform, that carry out software engineering tasks across an organization's codebase with minimal supervision. Its PR Author agent takes a task description and autonomously drives it from first commit ...

What is Cody?

Cody is an innovative AI assistant that uses its own knowledge base to provide personalized and tailored services. Forget using global databases like ChatGPT - with Cody, you can build a truly custom experience for your team, customers, and processes. This AI-powered solution can help with ...