DoubleZero vs MailerSend: Features, Pricing and User Reviews 2026
Compare features, pricing, reviews, and more to make an informed decision
DoubleZero
DoubleZero is a free, open-source email service you can host yourself using AWS SES for sending and monitoring emails.
MailerSend
MailerSend is a powerful email delivery platform designed for developers that helps businesses send reliable emails through APIs and SMTP.
DoubleZero
DoubleZero is a free, open-source email service you can host yourself using AWS SES for sending and monitoring emails.
MailerSend
MailerSend is a powerful email delivery platform designed for developers that helps businesses send reliable emails through APIs and SMTP.
DoubleZero
Self-hosted email service with AWS SES integration
Email monitoring dashboard with delivery tracking
Multi-recipient tracking and analytics
REST API and JavaScript client library
Open source and fully customizable
Docker container deployment
SST automated AWS configuration
Pro version with WYSIWYG editor and automation
Contact and list management capabilities
Team collaboration features
MailerSend
Email API with multiple language support
SMTP relay for easy integration
Drag and drop template builder
Real-time email tracking and analytics
Email address verification system
Inbound email routing
SMS messaging for US and Canada
Webhook notifications for email events
Team management with user permissions
Domain reputation monitoring
Dedicated IP options
Suppression list management
DoubleZero
DoubleZero offers two pricing options that stand out from typical subscription services.
The Free Version is completely open source and available at no cost. You can download the code, host it yourself, and use all core features including transactional emails, monitoring dashboard, multi-recipient tracking, SMTP endpoint, and REST API access. Your only costs are AWS SES fees, which are extremely low at around $0.10 per thousand emails.
The Pro Version costs $175 as a one-time purchase. This is not a monthly subscription. You buy it once and own it forever. Pro adds powerful features including a WYSIWYG email editor, contact management system, email lists, broadcast campaigns, team collaboration tools, activity feed, and automation workflows.
Both versions require you to provide your own AWS account and hosting, giving you complete control and keeping ongoing costs minimal.
MailerSend
MailerSend offers flexible pricing plans to fit different needs. The Free plan gives you 500 emails per month with basic features, perfect for testing or very small projects. You get one domain, one template, and basic tracking with 1-day activity history.
The Hobby plan costs $5.60 per month and includes 5,000 emails with email support and bulk sending capability. If you need more, additional emails cost $1.20 per 1,000 emails.
For growing businesses, the Starter plan at $28 per month provides 50,000 emails, SMS messaging, and 100 email verification credits. This plan supports 5 team members and 10 domains with 7-day activity tracking.
The Professional plan at $88 per month offers 50,000 emails with a dedicated account manager and better pricing on extra emails at $0.80 per 1,000.
Large companies can request Enterprise pricing with custom features including dedicated IPs, longer data storage, and priority support.