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Head-to-head · Email Server Software

IceWarp vs Mail-in-a-Box

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score IceWarp #4 in Email Server Software 8.8/10 30-day trial Free trial✓ 0 of 4 features Visit IceWarp
Mail-in-a-Box #8 in Email Server Software 8.4/10 Free plan Free plan✓ 0 of 4 features Visit Mail-in-a-Box

IceWarp leads on 0 checks, Mail-in-a-Box on 1, and 0 are even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreIceWarp · 8.8/10
  • Free planonly Mail-in-a-Box
  • Free trialonly IceWarp

IceWarp scores higher on our rubric for email server software: 8.8 against 8.4 out of 10; our editors rank them #4 and #8.

Mail-in-a-Box offers free plan; IceWarp doesn't.

IceWarp is the better fit for teams wanting hosted email plus collaboration tools. Mail-in-a-Box is the better fit for small teams self-hosting a complete mail setup.

  • IceWarp fits best

    Teams wanting hosted email plus collaboration tools

  • Mail-in-a-Box fits best

    Small teams self-hosting a complete mail setup

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.

Side by side

Feature IceWarp 8.8/10 Visit ↗ Mail-in-a-Box 8.4/10 Visit ↗
At a glance
Editor score 8.8 8.4
Ranking #4 in Email Server Software #8 in Email Server Software
Best for Teams wanting hosted email plus collaboration tools Small teams self-hosting a complete mail setup
Pricing model Paid Free
Starting price — Free plan
Free plan — ✓ (best)
Free trial 30 days —
Deployment Cloud, Self-hosted Cloud, Self-hosted, Browser extension
Platforms Web, Windows, macOS, Linux, iOS, Android Web, Linux
Support Email, Community, Docs Community
Compliance ISO 27001, GDPR, HIPAA 2FA
Integrations 2 integrations 1 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business
Features IceWarp 0/4 · Mail-in-a-Box 0/4
Mail transfer agent Not checked yet Not checked yet
Mailbox server Not checked yet Not checked yet
Integrated mail server Not checked yet Not checked yet
Directory integration Not checked yet Not checked yet
Specs
Deployment Not checked yet Not checked yet
Email protocols Not checked yet Not checked yet
Our review
Pros
  • Hosted email supports custom domains, IMAP, and POP3 access.
  • Includes calendar, mobile sync, chat, conferencing, and file collaboration.
  • Offers cloud or self-hosted deployment and Exchange migration tools.
  • Bundles Roundcube webmail with IMAP and SMTP access.
  • Automates TLS provisioning, mail DNS setup and system health checks.
  • Control panel manages users, aliases, DNS and backups.
Cons
  • No ongoing free plan; the Startup offer is a 30-day trial requiring a card.
  • Startup is listed at $35/month for a 10-user package.
  • Deployments starting from 500 users require a custom quote.
  • Requires a dedicated machine and ongoing server administration.
  • Community is the listed support channel.
  • Listed integration is limited to Amazon S3.
Our verdict

IceWarp combines business email with calendar and collaboration features for organizations that want hosted email on custom domains or prefer to run a server themselves. It suits small and mid-sized teams as well as larger deployments,…

Read the review →

Mail-in-a-Box is free, open-source software for people and small teams who want to operate their own email service. It turns a fresh cloud machine running Ubuntu into a mail server, with Roundcube webmail, IMAP and SMTP access, and contact…

Read the review →
  1. IceWarpEmail Server Software 8.830-day trial
  2. Mail-in-a-BoxEmail Server Software 8.4Free plan

Strengths and trade-offs

  • IceWarp — where it wins

    • Hosted email supports custom domains, IMAP, and POP3 access.
    • Includes calendar, mobile sync, chat, conferencing, and file collaboration.
    • Offers cloud or self-hosted deployment and Exchange migration tools.

    Where it doesn't

    • No ongoing free plan; the Startup offer is a 30-day trial requiring a card.
    • Startup is listed at $35/month for a 10-user package.
    • Deployments starting from 500 users require a custom quote.

  • Mail-in-a-Box — where it wins

    • Bundles Roundcube webmail with IMAP and SMTP access.
    • Automates TLS provisioning, mail DNS setup and system health checks.
    • Control panel manages users, aliases, DNS and backups.

    Where it doesn't

    • Requires a dedicated machine and ongoing server administration.
    • Community is the listed support channel.
    • Listed integration is limited to Amazon S3.

More comparisons

All email server software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update