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About

Modest system requirements, decent performance, simple installation and upgrade, no database required - all these make RainLoop Webmail a perfect choice for your email solution. Modern user interface. Complete support of IMAP and SMTP protocols including SSL and STARTTLS. Sieve scripts (Filters and vacation message). Minimalistic resources requirements. Direct access to mail server is used (mails are not stored locally on web server). Allows for adding multiple accounts to primary one, simultaneous access to different accounts in different browser tabs is supported. Additional identities. Administrative panel for configuring main options. Really simple installation and update. Integration with Facebook, Google, Twitter and Dropbox. Managing folders list. Simple look'n'feel customization. Configurable multi-level caching system. Extending functionality with plugins installed through admin panel. Perfect rendering of complex HTML mails. Drag'n'drop for mails and attachments.

About

SuperMailOS is managed business email on your own domain for small teams. You bring your domain; SuperMailOS runs the mail server and handles deliverability — SPF, DKIM, DMARC, IP reputation, and warmup — so your email lands in the inbox, not the spam folder. Setup takes minutes: verify your domain with one-click DNS on Cloudflare, DigitalOcean, and other providers (or guided copy-paste on any registrar), invite your team, and start sending. Every person gets a real mailbox; aliases like hello@ and support@ are unlimited and free. Webmail is as simple as Gmail — threads, instant search, keyboard shortcuts, labels, dark mode — plus IMAP and SMTP for any mail app, and a live deliverability dashboard showing your mail landing. Flat pricing per mailbox: Pro $3/mailbox/month annually (10 GB, 3 domains), Business $5 (30 GB, unlimited domains), custom at 50+. 14-day free trial, no credit card.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Companies looking for an email solution platform

Audience

Small and medium businesses, startups, agencies, and freelancers who want professional email on their own domain without running a mail server or managing DNS and deliverability themselves.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

$95 per year
Price for a single web domain
Free Version Supported
Free Trial Not Supported

Pricing

$3/month per mailbox
Free Version Not Supported
Free Trial Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 4.0 / 5
design 4.0 / 5
support 3.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Pros & Cons from Real Users

Pros

  • - Easy to install on your self-host server. - Runs reliably. - Modern interface, easy to use. - Plugins available.

Cons

  • - No unified view of different email accounts. - Versioning and upgrading could improve. - Slow upgrades. - Plugin market should be better supported and expanded.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

RainLoop
www.rainloop.net

Company Information

SuperMailOS
Founded: 2026
supermailos.com

Alternatives

Afterlogic Aurora

Afterlogic Aurora

AfterLogic

Alternatives

BlueMail

BlueMail

Blix

Categories

Email Clients Supported

Categories

Email Hosting Supported

Integrations

Dropbox Supported
Facebook Supported
Franz Supported
X (Twitter) Supported

Integrations

Dropbox Not Supported
Facebook Not Supported
Franz Not Supported
X (Twitter) Not Supported
Claim RainLoop and update features and information
Claim RainLoop and update features and information
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Claim SuperMailOS and update features and information