// COLD EMAIL GRADER

Stop hitting send on
bad cold email

Paste your subject + body. Get a 0-100 score across 7 dimensions, the exact phrases hurting your reply rate, and 3 specific rewrites. Heuristic engine, no AI lag, your text never leaves your browser.

// 100% client-side · scored in <100ms

Subject line0 / 100

Email bodypaste exactly what you'd send

Recipient role

Goal of email

Book meeting Get reply Drive click

// Paste your subject + body above to grade your cold email

// PRO · $7 ONE-TIME

Get 3 AI-rewritten variants tuned for your goal

Same input — three completely re-engineered versions: punchier subject, tighter hook, sharper CTA. Each variant tagged with the heuristic gain. Pay once, no subscription.

Get notified →

Want the cold email swipe file?

17 cold emails that got replies from Stripe, Linear, Notion, Vercel, and Anthropic founders — full text, what worked, what to steal. Free. We'll also tell you the day Pro launches.

// got it · check your inbox to confirm

// 01

Paste your draft

Subject + body. The role + goal selectors tune the heuristics — a CEO email is graded differently than a peer-engineer email.

// 02

See your 7-dimension score

Subject, hook, personalization, value prop, length, CTA, spam risk — each scored 0-10 with a one-line note on why.

// 03

Fix the top 3 issues

Each issue quotes the offending text from your email + a specific rewrite suggestion. Re-grade in seconds after editing.

Questions

The shortest answers to the things people ask before they paste.

Is this actually free? What's the catch?

Free, no signup, no rate limit. The grading runs entirely in your browser — we never see your email. Pro ($7 one-time) unlocks 3 AI-generated rewrites; the grader itself stays free forever. We monetize the swipe file mailing list and the Pro tier, not your data.

How accurate is the score vs. an actual A/B test?

The 7 dimensions encode the patterns that consistently move reply rates across thousands of B2B cold campaigns we and others have tracked. It's not a substitute for your own testing — but if you're scoring under 60, an A/B test isn't going to save you. Fix the foundations first.

Why these 7 dimensions specifically?

Subject = whether they open. Hook = whether they keep reading. Personalization = whether they trust it's not bulk. Value prop = whether they care. Length = whether they finish. CTA = whether they act. Spam risk = whether the inbox itself even shows it. Skip any one and the rest doesn't matter.

Does it check deliverability / DNS / SPF?

No — this is content-only. For deliverability infrastructure (SPF, DKIM, DMARC, blacklists, warm-up) check the Domain Scorer. They're complementary: domain-scorer checks if your email arrives, this checks if it converts.

Can I grade follow-ups too?

Yes — paste any single email. Follow-ups score differently because the personalization bar is lower (they already saw your first email) but the CTA bar is higher (they ignored you once). The grader doesn't know it's a follow-up; eyeball the personalization score loosely if it's a reply.

100% client-side — your email never leaves your browser. Heuristics encode patterns from thousands of B2B cold campaigns; not a substitute for your own A/B testing.
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