Email Outreach
Find prospect emails, generate personalized copy, sequence at scale, and manage sending infrastructure
Find a prospect's verified email address using a waterfall of providers
find-prospect-email
Email Waterfall
by Kitt + Findymail + LeadMagic + Prospeo + NeverBounceChain multiple email finders in sequence, verify each result with NeverBounce. Only 'valid' passes. Caches invalid emails to avoid redundant checks. Pay-per-find pricing makes it economical.
Example API call
POST https://api.trykitt.ai/v1/find-email
{
"first_name": "Alex",
"last_name": "Johnson",
"domain": "acme.com"
}
// Response:
{
"email": "alex@acme.com",
"source": "findymail",
"status": "valid",
"metadata": {
"api_calls": 4,
"attempts": [
{
"provider": "kitt_finder",
"value": null,
"verified": false
},
{
"provider": "findymail",
"value": "alex@acme.com",
"verified": true
}
]
}
}Alternatives
Largest single B2B database. Good for quick lookups but misses contacts a waterfall catches.
Generate personalized email sequences with spam detection and formatting
generate-email-copy
Copy Generator
by Claude API (Anthropic)Generate personalized multi-step email sequences from lead data. Built-in spam word detection, subject line variations, and output formatted for sequencer APIs.
Example API call
POST https://api.anthropic.com/v1/messages
{
"model": "claude-sonnet-4-6-20250514",
"max_tokens": 2000,
"messages": [
{
"role": "user",
"content": "Write a 3-email cold outreach sequence for Alex Johnson, VP of Sales at Acme Corp..."
}
]
}
// Response:
{
"sequences": [
{
"step": 1,
"subject_a": "Quick question about Acme's outbound",
"subject_b": "Saw Acme is scaling the sales team",
"body": "Hi Alex, ...",
"delay_days": 0
}
]
}Create campaigns, upload leads, and send emails at scale with tracking
sequence-emails
SmartLead
by smartlead.aiFull campaign lifecycle via API. Create campaigns, set schedules, upload leads in batches of 100, attach inboxes, start/pause, get analytics.
Example API call
POST https://server.smartlead.ai/api/v1/campaigns/create
{
"api_key": "YOUR_API_KEY"
}
// Response:
{
"id": 12345
}Alternatives
Strong API, built-in warmup and deliverability optimization.
Newer contender with good reviews. Worth evaluating.
Register domains, configure DNS, and create sending inboxes for cold outreach
setup-outreach-domains
AgentMail
by agentmail.toFully agentic. Edit DNS settings, set up custom domains, create inboxes via API. Best for doing this entirely through code.
Example API call
POST https://api.agentmail.to/v1/inboxes
{
"name": "Sales Outreach",
"domain": "yourdomain.com"
}
// Response:
{
"id": "inbox_xyz789",
"email": "sales@yourdomain.com",
"created_at": "2026-03-29T10:00:00Z"
}Alternatives
Managed service. Humans handle domain setup for you.