DoubleZero vs ImprovMX: 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.
ImprovMX
ImprovMX is a simple email forwarding service that lets you send and receive emails using your custom domain without hosting.
DoubleZero
DoubleZero is a free, open-source email service you can host yourself using AWS SES for sending and monitoring emails.
ImprovMX
ImprovMX is a simple email forwarding service that lets you send and receive emails using your custom domain without hosting.
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
ImprovMX
Custom domain email forwarding to existing inbox
SMTP sending for professional outbound emails
Catch-all addresses and regex routing rules
Fast 5-second average forwarding time
99.99% uptime guarantee
Email logs with configurable retention
API for programmatic management
GDPR compliant and privacy focused
No email storage on servers
Multiple domain support on paid plans
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.
ImprovMX
ImprovMX offers transparent pricing with a forever-free plan and scalable paid options.
The Free Plan includes 1 domain, 25 email aliases, basic forwarding features, and 7 days of email logs. This plan is perfect for personal projects and side businesses.
Premium ($9/month) expands to 30 domains, 100 aliases per domain, 10 routing rules per domain, 6,000 SMTP emails monthly, and up to 180 days of log retention with a 99% uptime guarantee.
Pro ($24/month) offers 100 domains, 200 aliases per domain, 50 routing rules per domain, 30,000 SMTP emails monthly, and the same extended logging and uptime guarantee.
Enterprise (Custom Pricing) provides unlimited everything with a 99.99% uptime guarantee, white-label options, and dedicated support. Contact their team for custom pricing based on your specific needs.