DoubleZero vs SMTP2Go: 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.
SMTP2Go
SMTP2Go is a cloud-based email delivery service that ensures reliable sending of emails with real-time tracking and global server coverage.
DoubleZero
DoubleZero is a free, open-source email service you can host yourself using AWS SES for sending and monitoring emails.
SMTP2Go
SMTP2Go is a cloud-based email delivery service that ensures reliable sending of emails with real-time tracking and global server coverage.
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
SMTP2Go
Reliable SMTP relay with global servers
Real-time email tracking and analytics
Automatic SPF and DKIM authentication
REST API with multiple language libraries
Subaccount management for agencies
Email testing and spam checking tools
Webhook notifications for email events
Dedicated IP addresses for high-volume senders
SMS messaging capability
24/7 customer support via multiple channels
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.
SMTP2Go
SMTP2Go offers flexible pricing to suit different needs, starting with a completely free option.
The Free Plan allows 1,000 emails per month with a daily limit of 200 emails. This includes 5 days of reporting and ticket support only, making it perfect for testing or very low-volume sending.
The Starter Plan costs $15 monthly and provides 10,000 emails per month. You get 30 days of reporting, full support through ticket, chat, and phone, plus features like subaccount management and SMS messaging. Extra emails cost $1.20 per thousand.
The Professional Plan is priced at $75 per month for 100,000 emails. This tier adds a dedicated IP address and email testing tools, with 30 days of reporting and all support channels. Additional emails are charged at $0.85 per thousand.
All paid plans allow you to send beyond your monthly allowance by paying for extra emails at the listed rates.