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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

Recommended

Email Waterfall

by Kitt + Findymail + LeadMagic + Prospeo + NeverBounce

Chain 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.

Auth: api_key
Setup: medium
Pricing: Usage-based per provider. Each only charges on successful finds.

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
      }
    ]
  }
}
View full docs →

Alternatives

Apolloby apollo.io

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

Recommended

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.

Auth: api_key
Setup: medium
Pricing: Usage-based Claude API pricing. ~50% cheaper with Batch API.

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
    }
  ]
}
View full docs →

Create campaigns, upload leads, and send emails at scale with tracking

sequence-emails

Recommended

SmartLead

by smartlead.ai

Full campaign lifecycle via API. Create campaigns, set schedules, upload leads in batches of 100, attach inboxes, start/pause, get analytics.

Auth: api_key
Setup: medium
Pricing: Base: $39/mo. Pro: $94/mo.

Example API call

POST https://server.smartlead.ai/api/v1/campaigns/create

{
  "api_key": "YOUR_API_KEY"
}

// Response:
{
  "id": 12345
}
View full docs →

Alternatives

Instantlyby instantly.ai

Strong API, built-in warmup and deliverability optimization.

Email Bisonby emailbison.com

Newer contender with good reviews. Worth evaluating.

Register domains, configure DNS, and create sending inboxes for cold outreach

setup-outreach-domains

Recommended

AgentMail

by agentmail.to

Fully agentic. Edit DNS settings, set up custom domains, create inboxes via API. Best for doing this entirely through code.

Auth: api_key
Setup: low
Pricing: Free: 3 inboxes. Developer: $20/mo.

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"
}
View full docs →

Alternatives

Hypertideby hypertide.io

Managed service. Humans handle domain setup for you.