Plandex vs Repomix
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
Open-source terminal AI coding agent for planning and making large, multi-file code changes.
Open source · MIT
A command-line tool that packs a whole code repository into one AI-friendly file.
The short answer
Choose Plandex if you need…
- Developers working in large codebases who want an AI agent to handle multi-file changes
- People comfortable working in a terminal
- Developers who want to choose or compare different model providers
- Teams that want to self-host the server with Docker
Choose Repomix if you need…
- Developers who want to ask an AI assistant questions about a whole project
- People preparing a codebase for an LLM with a limited context window who need token counts
- Teams that want to review or refactor code with an AI tool using one file as input
- Users who prefer not to install anything by running it with npx
Side-by-side
| Plandex | Repomix | |
|---|---|---|
| Type | CLI | CLI |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 15.9k | 29.1k |
| Setup difficulty | Intermediate | Beginner |
| How you get it | See the README | Install with a package manager |
| Main language | Go | TypeScript |
| Last code update | 13 months ago | 5 days ago |
What each one is
Plandex
Plandex is a terminal-based AI coding tool that plans and carries out coding tasks spanning many steps and many files. It keeps AI-generated changes in a diff review sandbox separate from your project until you approve them, and it can run commands and debug their output. Developers use it when AI tools struggle with larger projects.
Repomix
Repomix scans a project folder and combines all of its files into a single output file, such as XML, Markdown, or plain text. People use it to give an AI assistant like ChatGPT or Claude the full context of a codebase at once. It respects .gitignore files, can count tokens per file, and uses Secretlint to leave out files that look like they contain credentials.
Best for
Plandex
- Developers working in large codebases who want an AI agent to handle multi-file changes
- People comfortable working in a terminal
- Developers who want to choose or compare different model providers
- Teams that want to self-host the server with Docker
Repomix
- Developers who want to ask an AI assistant questions about a whole project
- People preparing a codebase for an LLM with a limited context window who need token counts
- Teams that want to review or refactor code with an AI tool using one file as input
- Users who prefer not to install anything by running it with npx
Strengths
Plandex
- Keeps AI-generated changes in a diff review sandbox until you approve them
- Offers both fully automatic and step-by-step review modes
- Supports version control of plan updates, including branches for comparing models
Repomix
- Simple to start: one command, and it can run without installation via npx
- Respects .gitignore, .ignore, and .repomixignore files and offers configurable include and exclude rules
- Provides token counts and multiple output formats (XML, Markdown, plain text)
Not ideal for
Plandex
- Windows users without WSL, because the README says it only works correctly in the WSL shell, not CMD or PowerShell
- People who want a point-and-click graphical interface, since it is terminal-based
- Anyone expecting Plandex Cloud, since the README says it is winding down and no longer accepts new users
Repomix
- Projects that are too large to fit in an AI model's context window, since the single file may exceed it
- Anyone who needs guaranteed secret removal, because it relies on Secretlint pattern matching for known credential formats
- Non-technical users who are uncomfortable using a terminal, unless they use the website or browser extension instead
Trade-offs
Plandex
- Requires API keys or a provider account, and the README notes Plandex Cloud is no longer accepting new users
- Full autonomy can run commands on your machine, so careful review and configuration matter
Repomix
- A large repository packed into one file can exceed an AI model's context limit
- Secret detection depends on Secretlint's known formats, so it cannot guarantee that no sensitive data is included
- The README is truncated, so some setup details and options may be missing from this summary
Getting started
Plandex
Install the CLI (macOS/Linux, per README)
curl -sL https://plandex.ai/install.sh | bashSet an OpenRouter API key (if using OpenRouter)
export OPENROUTER_API_KEY=...Repomix
Run without installing
npx repomix@latestInstall globally with npm
npm install -g repomixFrequently asked questions
What is the difference between Plandex and Repomix?
Plandex: Open-source terminal AI coding agent for planning and making large, multi-file code changes. Repomix: A command-line tool that packs a whole code repository into one AI-friendly file. Plandex suits developers working in large codebases who want an ai agent to handle multi-file changes, while Repomix suits developers who want to ask an ai assistant questions about a whole project.
Are Plandex and Repomix free?
Plandex: Free and open source. Repomix: Free and open source.
Which is easier to set up, Plandex or Repomix?
Repomix is easier to get started with (rated beginner); Plandex is rated intermediate and usually needs more setup.
Is Plandex or Repomix more popular?
Repomix has more GitHub stars (29.1k) than Plandex (15.9k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Plandex and Repomix?
Other options people compare them with include jcode, ShellGPT, omp, MiMoCode, Gitingest.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.