Email Permutator by lemlist Review

Introduction

Cold outreach lives or dies by email accuracy — but before you verify, you need plausible candidates. Manually guessing formats (“first.last? f.last? firstl?”) is slow and error-prone.

lemlist’s Email Permutator solves this foundational step: a 100% free tool that instantly generates 10+ standard email permutations from just a first name, last name, and company domain. No signup, no API keys — just copy, verify, and outreach. In this hands-on review, we test its coverage, usability, and how it fits into real-world lead validation workflows.

What Is the Email Permutator?

As confirmed on lemlist’s official page, this tool “creates multiple email variations instantly” using industry-standard patterns. Given inputs like Alex Morgan + zapier.com, it outputs:

• alex.morgan@zapier.com
• amorgan@zapier.com
• alex@zapier.com
• morgan.alex@zapier.com
• …and 6+ more common formats

It’s not an email finder (no live verification), but a candidate generator — ideal for pairing with lemlist’s Email Checker or Gmail’s native validation trick.

Key Features

• ✅ 100% Free — No Signup or Limits — Unlimited permutations, no paywall
• ✅ 10+ Standard Formats — Covers 95%+ of corporate email conventions
• ✅ One-Click Copy — Copy all or individual variants instantly
• ✅ B2B-Optimized — Prioritizes professional domains (e.g., company.com)
• ✅ Gmail Integration Tip — Tool suggests verifying via Gmail’s To: field preview (profile pic = likely valid)

Note: The tool does not include custom pattern creation or bulk CSV processing — but its speed makes manual batch entry feasible.

How to Use It (Step-by-Step)

1. Visit https://www.lemlist.com/free-tools/email-permutator
2. Enter:

• First name (e.g., Taylor)
• Last name (e.g., Reed)
• Company domain (e.g., notion.so)

3. Click “Permutate”
4. Wait <1 second — full list appears
5. Click “Copy to clipboard” (or copy individual lines)
6. (Optional) Paste into Gmail’s To: field to check for profile picture (quick validation)

💡 Pro Tip: Use with lemlist’s free Email Checker (10 verifications/day) to confirm which permutation is active.

Use Cases / Who Should Use This Tool

• 🎯 Cold emailers building lead lists from scraped names
• 🚀 Founders reaching early customers without CRMs
• 📊 Researchers compiling expert contact databases
• 🧪 Growth hackers testing multi-variant outreach
• 🤝 Recruiters sourcing passive candidates

Ideal when you have names + domains but lack verified emails — common in outbound scraping or LinkedIn prospecting.

Pros and Cons

Is It Free?

Yes — 100% free, with no hidden tiers. Unlimited use.

Alternatives

• Hunter.io Pattern Generator — similar, but capped in free plan
• VoilaNorbert “Guess” Feature — bundled in paid tool
• Manual spreadsheets — flexible but time-intensive

lemlist’s tool wins for simplicity, speed, and zero barriers — especially as a first step before verification.

Final Verdict

⭐ 4.5 / 5 — A lean, high-leverage utility that solves one job exceptionally well. While not a full email finder, it removes the guesswork bottleneck — letting you focus verification efforts on real candidates. Paired with Gmail’s visual cue or lemlist’s free Email Checker, it forms a powerful, no-cost validation workflow.

Highly recommended for solopreneurs, recruiters, and growth teams building lists from scratch.

FAQ

Q1: Does it work with Gmail or Outlook personal domains?
A: Technically yes — but accuracy drops. Best for professional domains (company.com).

Q2: Can I add custom patterns (e.g., first_initial+last@)?
A: Not in the UI — but you can manually edit the output list post-generation.

Q3: How do I verify which permutation is correct?
A: Three free ways:

1. Paste into Gmail’s To: field → profile pic = likely valid
2. Use lemlist’s free Email Checker (10/day)
3. Try in a low-volume test send (monitor bounces)

Q4: Does it support international name formats?
A: Supports standard Western first/last order. For Eastern order (e.g., Li Wei), swap fields manually.

Q5: Is there a bulk version?
A: Not standalone — but upload a CSV of LinkedIn URLs to lemlist’s free Email Finder for verified bulk results (100 free/month).