Turn your lead data
into personalized copy
Your leads have rich data. Generic AI ignores it. Smelt uses every field.
"hiring AEs in Austin right now? tough market for that"
Great lead data. Generic copy. Sound familiar?
You've invested in data. Don't waste it on copy that sounds like everyone else's.
Generic AI doesn't know your leads
ChatGPT writes one email at a time. For 10,000 leads, that's 10,000 copy-paste cycles.
Spintax fools no one
{Hi|Hey|Hello} {FirstName}... Recipients see through randomization instantly. There's no actual context about their company or role.
Per-credit AI adds up fast
Built-in AI in Instantly, Lemlist, and Clay charges per operation. At 100k leads, that's $2k-10k in AI credits alone.
Smelt reads your data. Writes copy that fits.
Same prompt. Different data. Unique copy for every lead.
Write a hook for {{Job Title}} at {{Company}} in {{City}}, {{Industry}}
Not templates. Not spintax. Actual AI personalization shaped by each prospect's specific details.
Smelt lives in Stage 3 of your cold email stack
You've already found and enriched your leads. Smelt turns that data into copy that converts.
Find Leads
Enrich Data
Generate Copy
Send Emails
Smelt complements your existing tools—doesn't replace them
Clay enriches data (finds company info, tech stacks, employee data). Smelt writes copy using that data. They're different stages. Many users export from Clay → import to Smelt → export to their sender.
AI copy generation—without the markup
Compare the real cost of generating personalized copy at scale
| Leads | Per-Credit Tools | Smelt BYOKSub + API costs | Smelt ManagedAll-inclusive | You Save |
|---|---|---|---|---|
| 10,000 | $500 - $2,000 | $19 + ~$15 API | $49 | 90-98% |
| 50,000 | $1,500 - $5,000 | $59 + ~$75 API | $129 | 91-97% |
| 100,000 | $2,000 - $10,000 | $149 + ~$150 API | $299 | 85-98% |
Lower subscription fee + you pay OpenAI directly. Best for high-volume users who want maximum control and savings. API costs are typically $0.001-0.002 per lead.
All-inclusive pricing with no API key needed. Best for teams who want simplicity without managing OpenAI accounts. We handle all AI infrastructure.
From CSV to personalized copy in 4 steps
Upload. Generate. Export. That's it.
Upload your leads
Drop your CSV from Apollo, ListKit, Clay, or anywhere. Smelt auto-detects columns and scores data quality.
Select templates
Choose from 10+ pre-built templates (hooks, pain points, CTAs) or create custom prompts with {{column}} variables.
Generate at scale
Process your entire list with parallel AI. Pause, resume, or cancel anytime. See real-time progress and cost.
Export & send
Download your original CSV with new AI-generated columns. Import directly into Instantly, Lemlist, or any sender.
Everything you need to personalize at scale
Smart column detection
Auto-identifies 15+ field types from your CSV
10+ pre-built templates
Hooks, pain points, compliments, CTAs—ready to use
Custom prompts
Create any prompt structure with {{column}} variables
Quality scoring
Each output rated 0-100, flagged issues highlighted
Pause/resume/cancel
Full control over batch processing
Works with any sender
Export to Instantly, Lemlist, Smartlead, or anywhere
Built for one thing: AI copy generation
We do one thing well—turn your lead data into personalized copy
Not a data enrichment platform
Use Clay, Clearbit, or Apollo for that. Smelt uses the data they provide.
Not a lead finder
Smelt doesn't discover leads. It writes copy for leads you already have.
Not an email sender
Export your personalized CSV to Instantly, Lemlist, Smartlead, or any sender.
Smelt complements your enrichment and sending tools—doesn't replace them. Clay tells you about your leads. Smelt talks to them.
Ready to smelt your raw leads into gold?
Start for free today with 250 leads/month. No credit card required.