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Head-to-head · Mailing List Management Software

GNU Mailman vs Groups.io

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score GNU Mailman #3 in Mailing List Management Software 8.7/10 Free plan Free plan✓ 5 of 5 features Visit GNU Mailman
Groups.io #5 in Mailing List Management Software 8.5/10 Free plan · 30-day trial Free plan✓ 4 of 5 features Visit Groups.io

GNU Mailman leads on 1 check, Groups.io on 0, and 5 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGNU Mailman · 8.7/10
  • Free planboth
  • Most featuresGNU Mailman · 5 of 5

GNU Mailman scores higher on our rubric for mailing list management software: 8.7 against 8.5 out of 10; our editors rank them #3 and #5.

GNU Mailman offers self-hosted option; Groups.io doesn't.

GNU Mailman is the better fit for organizations managing moderated email lists. Groups.io is the better fit for groups needing hosted lists with member collaboration.

  • GNU Mailman fits best

    Organizations managing moderated email lists

  • Groups.io fits best

    Groups needing hosted lists with member collaboration

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 GNU Mailman 8.7/10 Visit ↗ Groups.io 8.5/10 Visit ↗
At a glance
Editor score 8.7 8.5
Ranking #3 in Mailing List Management Software #5 in Mailing List Management Software
Best for Organizations managing moderated email lists Groups needing hosted lists with member collaboration
Pricing model Free Free plan + paid
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted, Cloud, Browser extension Cloud, Mobile
Platforms Linux, macOS, Web Web, iOS, Android
Support Docs, Community Email, Docs
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features GNU Mailman 5/5 · Groups.io 4/5
Moderation controls ✓ ✓
Subscriber preferences ✓ ✓
Self-hosted option ✓ (best) —
Message archives ✓ ✓
Signup forms ✓ ✓
Specs
List modes Both Both
Our review
Pros
  • Moderates messages and supports moderator approval before delivery
  • Lets subscribers manage membership, delivery preferences, and digests
  • Offers web archives through HyperKitty and a REST-based API
  • Supports open, restricted, moderated, and announcement-only groups
  • Searchable message archives and member-managed delivery preferences
  • Paid plans add calendars, chat, polls, files, photos, and wikis
Cons
  • Does not provide campaign analytics or segmentation
  • Web archives depend on HyperKitty being installed and configured
  • The suite's separate components can add deployment complexity
  • The product focuses on group communication rather than campaign marketing
  • Premium charges are member-based, with minimum monthly or annual charges
  • Enterprise billing details are not fully specified
Our verdict

GNU Mailman is free, open-source software for managing email discussion and e-newsletter lists. It is aimed at organizations that want to administer mailing-list membership and message handling, especially when moderation matters.…

Read the review →

Groups.io is a hosted email-group and listserv service for communities, nonprofits, teams, and larger organizations that need shared discussion with moderator controls. Members can post by email or through a group website, while owners can…

Read the review →
  1. GNU MailmanMailing List Management Software 8.7Free plan
  2. Groups.ioMailing List Management Software 8.5Free plan · 30-day trial

Strengths and trade-offs

  • GNU Mailman — where it wins

    • Moderates messages and supports moderator approval before delivery
    • Lets subscribers manage membership, delivery preferences, and digests
    • Offers web archives through HyperKitty and a REST-based API

    Where it doesn't

    • Does not provide campaign analytics or segmentation
    • Web archives depend on HyperKitty being installed and configured
    • The suite's separate components can add deployment complexity

  • Groups.io — where it wins

    • Supports open, restricted, moderated, and announcement-only groups
    • Searchable message archives and member-managed delivery preferences
    • Paid plans add calendars, chat, polls, files, photos, and wikis

    Where it doesn't

    • The product focuses on group communication rather than campaign marketing
    • Premium charges are member-based, with minimum monthly or annual charges
    • Enterprise billing details are not fully specified

More comparisons

All mailing list management software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update