Pre-send email simulator · Powered by Claude AI

Will this email
get a reply?

Paste your email. Simulate it against 16 real decision-maker personas across any industry. Get a verdict, a score breakdown, and an AI-rewritten version — in seconds.

No account required · Works instantly
💼
CFO
Fintech · Ireland
34%
Opens
6.4%
Replies
68
Score
Credibility
Motivation
Friction
👔
CEO
SaaS · UK
48%
Opens
7.8%
Replies
74
Score
Relevance
Actionability
Friction
🚀
Founder
Series A · PropTech
24%
Opens
3.2%
Replies
41
Score
Relevance
Credibility
Motivation
Built for BD teams
who care about reply rates
🎭

16 Decision-Maker Personas

CEO, CFO, CTO, Founder, VP Sales, VP Marketing, Head of Product, Procurement, Operations, Legal, HR, Finance, and more — each with distinct priorities, tolerances, and reply patterns.

📐

6-Dimension Scoring Engine

Every email is scored across Open Likelihood, Relevance, Credibility, Friction, Motivation, and Actionability — with plain-English explanations of what's dragging your score down.

📊

Monte Carlo Population Simulation

Run against 1K, 10K, 100K, or 1M simulated recipients. Get estimated open rate ranges, reply rate ranges, and a reaction distribution — directionally accurate, not absolute forecasts. Higher sample sizes give tighter, more stable estimates.

Claude AI Rewrites

Three variants — Tighter, More Direct, More Commercial — generated by Claude with your specific issues fixed. Add your API key and rewrites are instant.

🔁

Sequence Simulator

Simulate a full 5-step cadence — cold outreach, follow-up, value add, breakup. See projected reply rates across the whole sequence with a waterfall funnel.

📁

Template Library

Save your best emails, scored and tagged by type and persona. Sort by highest reply rate, highest score, or most recent. Load any template back into analysis in one click.

Pay as you go.
No subscription.
Start free — one run on each tool included. Top up when you need more.
1 credit = 1 run on any tool (Simulate, Rewrite, A/B Test, Sequence).
🎁
Free — always
1 free run on every tool. No card needed, no account required.
Starter
$5
20 credits · 25¢ per run
  • 20 simulation runs
  • All 16 personas
  • Claude AI rewrites
  • Sequence simulator
  • A/B testing
  • Never expires
Pro
$30
200 credits · 15¢ per run
  • 200 simulation runs
  • Everything in Standard
  • 1M population simulation
  • LinkedIn-aware rewrites
  • Priority support
  • Never expires

📋 Recent simulations

Your Email

🎯 Context about this person helps Claude personalise the rewrite
LinkedIn profile (paste full text)

Personas

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Simulated audience
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📊 Compare two versions of your email — see which one wins before you send
A

Current version

B

Rewritten version

Try pasting a rewrite from the Analyse tab
Judge as
Their industry
🎯 Context about this person helps Claude personalise the comparison
LinkedIn profile (paste full text)

Email Sequence

Up to 5 steps

Simulate as

0 selected
Quick:
Simulated audience
Add emails to each step to continue

Save Template

Your Templates