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Head-to-head · Email Server Software

IceWarp vs Synology MailPlus Server

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks 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
Synology MailPlus Server #6 in Email Server Software 8.6/10 Free plan Free plan✓ 4 of 4 features Visit Synology

IceWarp leads on 0 checks, Synology MailPlus Server on 1, and 4 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreIceWarp · 8.8/10
  • Free planonly Synology MailPlus Server
  • Free trialonly IceWarp
  • Most featuresSynology MailPlus Server · 4 of 4

IceWarp scores higher on our rubric for email server software: 8.8 against 8.6 out of 10; our editors rank them #4 and #6.

Synology MailPlus Server offers free plan; IceWarp doesn't.

IceWarp is the better fit for teams wanting hosted email plus collaboration tools. Synology MailPlus Server is the better fit for synology NAS users hosting organizational email.

  • IceWarp fits best

    Teams wanting hosted email plus collaboration tools

  • Synology MailPlus Server fits best

    Synology NAS users hosting organizational email

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 ↗ Synology MailPlus Server 8.6/10 Visit ↗
At a glance
Editor score 8.8 8.6
Ranking #4 in Email Server Software #6 in Email Server Software
Best for Teams wanting hosted email plus collaboration tools Synology NAS users hosting organizational email
Pricing model Paid Free plan + paid
Starting price — Free plan
Free plan — ✓ (best)
Free trial 30 days —
Deployment Cloud, Self-hosted Self-hosted
Platforms Web, Windows, macOS, Linux, iOS, Android Web, iOS, Android
Compliance ISO 27001, GDPR, HIPAA GDPR
Integrations 2 integrations 7 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features IceWarp 0/4 · Synology MailPlus Server 4/4
Mail transfer agent Not checked yet ✓ (best)
Mailbox server Not checked yet ✓ (best)
Integrated mail server Not checked yet ✓ (best)
Directory integration Not checked yet ✓ (best)
Specs
Deployment Not checked yet Self-hosted
Email protocols Not checked yet SMTP, IMAP, POP3
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.
  • Supports SMTP, IMAP, and POP3 for mail-client access
  • Migration from Microsoft Exchange and Google Workspace
  • Directory integration, policy controls, filtering, and clustering
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 compatible Synology NAS hardware and self-hosted administration
  • Only five email-account licenses are included with compatible NAS hardware
  • License packs add cost, and pricing is not published on the official page
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 →

Synology MailPlus Server turns compatible Synology NAS hardware into a self-hosted organizational email system. It suits small, mid-market, and enterprise teams that want to host custom or multiple domains and administer mail on their own…

Read the review →
  1. IceWarpEmail Server Software 8.830-day trial
  2. Synology MailPlus ServerEmail Server Software 8.6Free 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.

  • Synology MailPlus Server — where it wins

    • Supports SMTP, IMAP, and POP3 for mail-client access
    • Migration from Microsoft Exchange and Google Workspace
    • Directory integration, policy controls, filtering, and clustering

    Where it doesn't

    • Requires compatible Synology NAS hardware and self-hosted administration
    • Only five email-account licenses are included with compatible NAS hardware
    • License packs add cost, and pricing is not published on the official page
  • IceWarp8.8/10 · 30-day trial

    Hosted business email with calendars, mobile sync, and team collaboration features.

    Visit IceWarpFull verdict →
  • Synology MailPlus Server8.6/10 · Free plan

    A full-featured mail server for organizations already running compatible Synology NAS hardware.

    Visit SynologyFull verdict →

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