50x cheaper than per-credit AI tools

Turn your lead data
into personalized copy

Your leads have rich data. Generic AI ignores it. Smelt uses every field.

Your Lead Data
title:VP Sales
company:Acme Corp
city:Austin
industry:SaaS
AI-Generated Copy

"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.

// Your prompt template

Write a hook for {{Job Title}} at {{Company}} in {{City}}, {{Industry}}

// Each lead gets unique output
VP Sales, Acme Corp, Austin, SaaS
"hiring AEs in Austin right now? tough market for that"
CEO, BuildRight, Denver, Construction
"Denver construction is wild rn - how are you keeping margins up?"
Marketing Director, HealthFirst, Boston, Healthcare
"patient acquisition in Boston is brutal - what's working for you?"

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.

1

Find Leads

Apollo
ListKit
ZoomInfo
LinkedIn
2

Enrich Data

Clay
Clearbit
Apollo enrichment
3

Generate Copy

SMELT
← You are here
4

Send Emails

Instantly
Lemlist
Smartlead

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

LeadsPer-Credit ToolsSmelt BYOKSub + API costsSmelt ManagedAll-inclusiveYou Save
10,000$500 - $2,000$19 + ~$15 API$4990-98%
50,000$1,500 - $5,000$59 + ~$75 API$12991-97%
100,000$2,000 - $10,000$149 + ~$150 API$29985-98%
BYOK Mode

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.

Managed Mode

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.

01

Upload your leads

Drop your CSV from Apollo, ListKit, Clay, or anywhere. Smelt auto-detects columns and scores data quality.

02

Select templates

Choose from 10+ pre-built templates (hooks, pain points, CTAs) or create custom prompts with {{column}} variables.

03

Generate at scale

Process your entire list with parallel AI. Pause, resume, or cancel anytime. See real-time progress and cost.

04

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.