An open-source Jasper alternative that already knows your product

Jasper asks you to teach it your brand and product. Tin runs on the coding agent that already has your repository open, and drafts from that knowledge in a voice captured from your own writing.

Try in browser →

codex mcp add tin --url https://app.tin.computer/mcp

What Tin does in place of Jasper

3 workflows

the job	how Tin does it	workflow
Brand voice	An editable voice guide from samples you choose.	style.capture →
Blog drafts	Planned articles drafted after a coverage check.	content.generate →
Thought leadership	Rigorous public articles from project evidence.	content.public_article →

What Tin does not replace.Jasper is still good at its own job.

Jasper is an AI content platform for marketing teams, with brand voice, templates and campaign workflows across many content types.

Jasper still does this better

Short-form templates for ads, social posts and product descriptions.
A shared workspace for a marketing team.

Choose Tin when

Your content is technical or product-specific and accuracy is the hard part.

Stay with Jasper when

A marketing team needs many formats of copy at volume.

What every workflowcomes 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.

Writing style capturestyle.capture Planned article draftscontent.generate Public articlecontent.public_article

Questions.

Does Tin write social posts and ad copy?

Social posts, yes: Tin drafts X and LinkedIn posts from a weekly plan or an article, and release posts from a changelog, all for your review. Ad creative is still planned.

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.

Add Tin to your coding agent.It takes one command.