An open-source Apollo alternative that starts with people you know
Apollo sells access to a contact database and sequences on top. Tin takes the opposite route: it builds a shortlist from your own mailbox and calendar, and sends only what you approved.
codex mcp add tin --url https://app.tin.computer/mcpWhat Tin does in place of Apollo
Apollo is a sales platform combining a large B2B contact database with enrichment, sequencing and a dialer.
| the job | how Tin does it | workflow |
|---|---|---|
| Building a prospect list | An evidence-backed shortlist from your Gmail and Calendar history. | outreach.email_shortlist → |
| Email sequences | Approved copy, paced sending, follow-ups that stop on reply. | outreach.email_campaign → |
What Tin does not replace
Tin is not a clone. Here is where each one fits.
Apollo still does this better
- A purchased B2B contact database and enrichment. Tin's list building and enrichment is in build.
- Dialer, LinkedIn steps and CRM features.
Choose Tin when
You are a founder whose best prospects are already somewhere in your inbox.
Stay with Apollo when
You run outbound at volume to people you have never met.
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 find email addresses?
No. The shipped workflows work from your own mailbox. Enrichment is in build.
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.