Sigma Foundry › Business & Sales › Free tool

Cold Email Research & Outreach Builder

For founders and one-person sales teams: describe your offer and one prospect, get a 5-minute research checklist and a 4-email sequence (opener, value nudge, proof, breakup), each under 120 words with three subject lines and a self-score against the Cold Email Score Card rules.

Your offer

Your name

Your company (optional)

What you do (verb phrase)

Reads as "I ___ for ___".

For whom

Outcome, with a number

Past tense, one number. This is the proof line.

Target client type

The prospect

First name

Company

Role

One thing you noticed about them (a URL or a note)

A note becomes the first sentence. A URL becomes "I was on domain" plus a bracket for you to fill.

Tone

Goal of the first email

Use AI (optional) — bring your own Anthropic key

The template sequence works without a key. With a key, one request writes the four emails around your prospect under the same constraints; any email that fails the checks keeps the template version. Your key is sent only to api.anthropic.com from your browser. Sigma Foundry never sees it.

Anthropic API key

Model

Remember on this device

What we asked (the prompt that was sent)

Already have a draft? Paste it into the Cold Email Score Card for the same seven checks with line-by-line fixes, or browse the rest of the Business & Sales tools.

Open the Cold Email Score Card → · Browse Business & Sales tools →

Built by a founder who has sent the bad version of these emails. Drafts, not scripts: fill the [bracketed] specifics, cut anything that does not sound like you, and never send without the research step. Scoring rules (subject ≤ 7 words, no fake Re:, spam-word list, first sentence about them, a number, one question, ≤ 120 words, you/I ratio) match the Cold Email Score Card, verified 2026-09-15; tell us if something changed. Privacy · nothing you type leaves your browser unless you use your own AI key or email yourself a result.