Cold email software built for teams that actually send
Run cold email campaigns with AI personalization, automatic warm-up, deliverability monitoring and a unified inbox. Unlimited inboxes and contacts. Pay only for what you send.
No credit card required · Free unlimited warmup included · 250 free credits
Cold email software automates outbound campaigns — sequencing, sending across multiple inboxes, follow-ups, and reply handling — while protecting your sender reputation. AlienMail adds AI that learns your brand before writing, warms every inbox for free, and charges per email sent instead of a monthly subscription.
How it works
A modern, three-step pipeline engineered for inbox delivery and high conversion.
Connect unlimited inboxes & domains
Add as many Google Workspace, Microsoft 365, or SMTP/IMAP accounts as you need with automated warm-up and zero per-seat fees.
AI generates personalized campaigns
Alien AI reads your website and ICP to generate high-converting sequences, subject lines, and match-scored angles tailored to your offer.
Launch with unified inbox & intent tagging
Upload verified leads, send with smart rotational delivery, and manage all replies with automatic AI intent categorization in one dashboard.
Cold email software vs. Email marketing tools: The fundamental difference
Traditional email marketing tools (like Mailchimp or Klaviyo) are built for opt-in newsletters sent through shared mass IP addresses where recipients already know your brand. Cold email software is engineered for one-to-one B2B outreach through dedicated business mailboxes, utilizing rotational sending, randomized delays, automated warm-up, and advanced SPF/DKIM authentication to reach the primary inbox.
AI personalization that writes with your authentic brand voice
Most cold email tools generate generic, cookie-cutter templates that prospects immediately identify as automated spam. AlienMail grounds its AI in your actual business positioning, customer pain points, and case studies, creating dynamic personalized opening lines and contextual follow-ups that convert.
Unlimited inboxes, contacts, and team seats with pay-per-email pricing
Traditional cold outreach tools charge steep $47 to $150+ monthly subscriptions even when your campaigns are paused. AlienMail eliminates monthly retainers and artificial limits: you get unlimited workspaces, unlimited sender accounts, unlimited contact uploads, and only pay a micro-rate for the actual emails you send.
Cold Email Software Comparison (2026)
Verified August 2026. Sourced from vendor pricing pages.
| Feature / Capability |  AlienMail | Instantly | Smartlead | Lemlist | Saleshandy |
|---|---|---|---|---|---|
| Pricing & Inboxes | |||||
| Monthly subscription fee | $0 (Pay per email) | $47 / mo min | $39 / mo min | $59 / mo min | $36 / mo min |
| Inbox connection limit | Unlimited | Unlimited | Unlimited | Limited by plan | Unlimited |
| Uploaded contacts limit | Unlimited | 1,000 – 25,000 | 2,000 – 30,000 | 500 – 10,000 | 2,000 – 30,000 |
| Team seats cost | $0 (Unlimited) | Varies by plan | $0 (Unlimited) | Per seat add-on | Per seat add-on |
| Core Features | |||||
| Automated inbox warm-up | Free (Unlimited) | Included ($47+) | Included ($39+) | Included ($59+) | Included ($36+) |
| AI Brand Intelligence | ✓ Included | ✕ | ✕ | ✕ | ✕ |
| Match-scored campaign suggestions | ✓ Included | ✕ | ✕ | ✕ | ✕ |
| Reply intent classification | ✓ Included | ✕ | ✓ Included | ✕ | ✕ |
| Pre-send deliverability monitoring | ✓ Included | ✓ Included | ✓ Included | ✓ Included | ✓ Included |
| Multi-workspace for agencies | Unlimited ($0) | Paid add-on | Paid add-on | Paid add-on | Paid add-on |
Pay per email sent — zero monthly retainers
Never pay for unused software seats or idle subscriptions again. Upload unlimited leads, connect unlimited mailboxes, and only pay as you send.
| Monthly Send Volume | Total Cost | Effective Rate / Email | Workspaces & Seats | Warm-Up Included |
|---|---|---|---|---|
| 5,000 – 9,990 emails | $10 – $19 (₹500 – ₹999) | $0.0010 / ₹0.10 / email (Base) | Unlimited ($0) | 100% Free |
| 16,600 – 83,300 emails | $20 – $99 (₹1,000 – ₹4,999) | $0.0006 / ₹0.06 / email (40% off) | Unlimited ($0) | 100% Free |
| 125,000 – 624,900 emails | $100 – $499 (₹5,000 – ₹24,999) | $0.0004 / ₹0.04 / email (60% off) | Unlimited ($0) | 100% Free |
| 833,000+ emails | $500+ (₹25,000+) | $0.0003 / ₹0.03 / email (70% off) | Unlimited ($0) | 100% Free |
Who uses AlienMail for cold outbound?
Lead Gen & Marketing Agencies
Manage dozens of client accounts under isolated workspaces with zero seat fees and shared credit pooling.
SDR & Outbound Sales Teams
Scale pipeline generation with AI match-scoring, rotating inboxes, and automated positive intent reply routing.
SaaS & Startup Founders
Test new market positioning and book customer discovery calls without taking on high SaaS monthly overheads.
Global cold email legal compliance
AlienMail provides enterprise deliverability infrastructure designed to support worldwide compliance standards.
- CAN-SPAM Act (United States): Automatic inclusion of clear sender identification, physical mailing address, and one-click unsubscribe links.
- GDPR Compliance (European Union): Legitimate interest B2B outreach standards, instant contact deletion upon request, and data processing security.
- CASL (Canada) & Privacy Regulations: Support for opt-out record tracking and suppression list management across all campaign sequences.
Frequently Asked Questions
Everything you need to know about AlienMail features and deliverability.
What is cold email software?
Cold email software is a platform designed to automate personalized one-to-one email outreach at scale, handle multi-step sequences, rotate sender inboxes, and monitor deliverability without landing in spam folders.
How is cold email software different from email marketing tools?
Email marketing platforms (like Mailchimp) send bulk newsletters to opted-in subscribers via shared IPs. Cold email software connects directly to your own Google Workspace or Microsoft 365 inboxes to send genuine individual messages with automated warm-up and inbox rotation.
How much does cold email software cost?
Most providers charge $36 to $99+ per month on flat subscription models. AlienMail operates on a pay-per-email model starting at $0.001 (₹0.10) per email with volume discounts down to $0.0003 (₹0.03) per email with zero monthly fees.
Is there free cold email software?
Yes. AlienMail allows you to sign up, connect unlimited inboxes, warm them up, and build campaigns completely free, paying only for the emails you dispatch.
Is cold email legal?
Yes, B2B cold email is legal worldwide when compliant with regulations such as CAN-SPAM (US), GDPR (EU), CASL (Canada), and local IT laws. Requirements include providing a clear opt-out/unsubscribe mechanism, accurate sender info, and a legitimate business reason for contact.
How many cold emails can I send per day?
To protect domain reputation, we recommend sending 30 to 40 emails per day per inbox. To scale to 1,000+ daily emails, connect and rotate multiple inboxes across secondary domains.
Do I need a separate warm-up tool?
No. AlienMail includes free, automated peer warm-up for all your connected mailboxes.
Can I connect multiple inboxes and domains?
Yes. AlienMail supports unlimited mailbox and domain connections with automated inbox rotation across sequences.
Does AlienMail work with Gmail and Outlook?
Yes. We support direct OAuth2 authentication with Google Workspace and Microsoft 365, plus SMTP/IMAP for custom providers.
What is the best cold email software for lead generation agencies?
AlienMail is built specifically for agencies and multi-brand teams, offering unlimited workspaces, unlimited team seats, and centralized billing with no per-client markups.
Can I use custom tracking domains?
Yes. Setting up custom tracking domains for open and click tracking is fully supported and recommended for maximum deliverability.
Related Features & Guides
Email Warm-Up Tool
Automate inbox reputation building with 100% free peer warmup.
Deliverability Monitoring
Real-time health scores, spam monitoring, and drift alerts.
Email Verification
Pre-send multi-layer list verification to eliminate hard bounces.
AlienMail vs Instantly
Detailed head-to-head comparison of features, pricing, and AI capabilities.
Smartlead Alternatives
See why scaling agencies switch to AlienMail for $0 seat fees and usage billing.
Transparent Pricing
Pay-as-you-grow rates with unlimited mailboxes, seats, and contact uploads.
Scale your outbound revenue without subscriptions
Connect unlimited inboxes, generate brand-tailored campaigns with AI, and launch your first sequence today for $0 upfront.