An open-source Surfer SEO alternative that knows your product
Surfer scores a draft against the pages that rank. Tin researches the keywords, plans the roadmap and drafts the article from what your product really does, then checks your existing coverage before writing.
codex mcp add tin --url https://app.tin.computer/mcpWhat Tin does in place of Surfer SEO
Surfer SEO is a content optimization tool: a content editor with a live score, SERP-based term suggestions and an AI writer.
| the job | how Tin does it | workflow |
|---|---|---|
| Finding what to write | Keyword inventory from buyer searches and competitor keywords. | organic.keyword_plan → |
| Content planning | Editable roadmap from two weeks to six months. | content.plan → |
| AI drafting | Drafts the next planned article in your voice, after a coverage check. | content.generate → |
What Tin does not replace
Tin is not a clone. Here is where each one fits.
Surfer SEO still does this better
- A live content score while you type.
- Term frequency suggestions from the top ranking pages.
Choose Tin when
You want accurate articles about your own product, delivered to your repository for review.
Stay with Surfer SEO when
Writers on your team optimize drafts by hand against a score.
What every workflow here comes with
Battle tested on real products
These are the workflows we run for real companies. Claw Messenger went from about $45 to $2,105 in monthly revenue in 124 days on them. Each one has declared inputs, bounded execution and tests, and anything public waits for your review.
See the case study →Open source: read it, fork it, self-host it
Apache 2.0. Every workflow is a folder in the repository: the steps it runs, the data it reads and what it is allowed to do. Change it, or run the whole system on your own machine.
Open the repo →Runs on the agent that already knows your product
Tin connects to Claude Code, Codex or Cursor over MCP. That agent has your repository open and knows your product, customers and voice, so it fills the inputs and reviews the output. You never brief a new tool from zero.
All workflows →The workflows behind this page
Each one is a folder in the repo. Open a page for its steps, inputs and output.
Questions
Does Tin give a content score?
No. Tin's bet is that accuracy and editorial judgment matter more: it checks coverage, keeps evidence separate from copy, and requires your review.
Is Tin really open source?
Yes. Tin is licensed under Apache 2.0 and the source is at github.com/tin-computer/tin. You can read every workflow, change it, and self-host the whole system.
Which coding agents can run Tin workflows?
Any agent that speaks MCP, including Claude Code, Codex and Cursor. There is also an API, and the same projects run in the browser at app.tin.computer.
Why run marketing from a coding agent?
Because it already knows your product. It has the repository open, so it fills workflow inputs accurately, reviews output against what the product really does, and can act on the results in the same session.