Hyper-Personalized Cold Emails — For Every Lead, In Minutes
Upload your lead list. Download ready-to-launch sequences built around your offers and each prospect's profile. Your prospects will think you wrote each one yourself.
No credit card required
Works with your sending tool
Download your sequences as a CSV. Map the columns. Start sending.
From lead list to ready-to-launch sequences in three steps
Build your campaign
Tell MachFive about your business, your offers, and who you're targeting. Our AI builds a strategic foundation — market research, audience insights, offer positioning — so every email hits the right notes.
Upload your leads
Drop your CSV. Names, titles, company data, custom fields — the more context you give, the better the personalization. MachFive processes thousands of leads in minutes.
Download and launch
Get a CSV with fully unique email sequences appended to each lead. Map the columns in Instantly, Smartlead, or your sending tool. No spintax. No randomization. No spam checking. Ready to send.
Not just an AI writer. A campaign strategist that writes.
Most AI email tools know nothing about your business. You paste a product description, pick a template, and hope for the best.
MachFive is different. Before writing a single email, it builds a strategic foundation specific to your business and your target audience. Then it writes sequences that deploy your assets — your offers, your proof points, your positioning — tailored to each individual prospect.
Writes unique sequences per lead
Every email is crafted for that specific prospect. Different structure. Different hooks. Different proof points. Not templates with variables — actually unique emails that read like you wrote them yourself.
Learns your business
MachFive starts with your company details, your value propositions, your case studies, and your offers. It creates a strategic profile that informs every email it writes — so your outreach sounds like it came from your best salesperson, not a generic AI.
Researches your market
Before you target anyone, MachFive analyzes your competitive landscape and identifies high-potential audiences. You get market insights and target audience recommendations built into the campaign.
100+ hours of writing. Done in the time it takes to grab coffee.
Writing truly personalized cold email sequences by hand takes forever. For a 1,000-lead campaign with a 3-email sequence, you're looking at:
MachFive's emails aren't just faster — they're better.
Every sequence is built around your strategic positioning and tailored to each prospect's profile. No templates. No cleanup. No campaign fatigue from repetitive patterns.
What you skip
- Spintax and randomization
- Spam checking every variation
- Formatting for your sending tool
- The "does this sound too similar?" review
What you get
- Fully unique sequences per lead
- Ready-to-upload CSV
- Emails that deliver better because they're actually different
Better deliverability. Healthier domains.
When you send the same template structure repeatedly, email providers notice. Microsoft and Google flag similar patterns. Your emails land in spam. Your domain reputation suffers. Recovery takes months.
MachFive solves this at the source. Every email is structurally unique — different openings, different hooks, different CTAs. No patterns to flag. No campaign fatigue. Your emails land in the primary inbox where they belong, and your domain stays healthy.
Built for teams who take cold email seriously
Give your SDRs superpowers
Your reps are spending 30-50% of their time writing emails instead of having conversations. Or they're sending the same templates and watching reply rates drop. MachFive changes the equation.
Stop choosing between personalization and productivity. Get both.
Built by GTM Engineers
MachFive was built by the team behind a cold email agency that served 30+ clients across dozens of industries. Hundreds of campaigns have been written. What works and what doesn't has been learned firsthand.
MachFive started as an internal tool — the system that was needed when manually writing sequences at 2am. Now it's available to everyone who takes cold email seriously.
This isn't another AI wrapper. It's the accumulated knowledge of years of cold email work, encoded into a system that writes better emails faster than manual writing ever could.
Everything you need. Nothing you don't.
Hypersonic Processing
Upload thousands of leads. Get unique sequences back in minutes. Our multi-agent system works in parallel to deliver at speed.
Ready-to-Send Output
No spintax. No spam checking. No manual formatting. Download a CSV, map your columns, and launch.
Works With Your Tools
Instantly, Smartlead, Lemlist, Apollo, GMass, EmailBison — if it accepts a CSV, MachFive works with it.
AI Campaign Chat
Your 24/7 cold email strategist. Ask it to refine sequences, test new angles, or optimize underperforming campaigns.
Strategic Foundation
Market research, target audience analysis, offer optimization — all built into every campaign before a single email is written.
Your Data, Your Control
MachFive works with you, not instead of you. Review, edit, and refine at every step. This isn't an autonomous AI SDR — it's a tool that makes you better.
Ready to launch?
Start with 100 free leads. No credit card required.
Get Started for FreeSee what hyper-personalized cold email looks like — for your business, your offers, your prospects.