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Omnisend alternatives · Email Marketing

Open-source alternatives to Omnisend

Omnisend is not described as open source on its own site. 4 of the 57 other email marketing and newsletter tools in this directory are open source, according to their own sites.

Omnisend has a free plan. Paid plans start at $16 per month for up to 500 contacts, billed monthly. 2 of them are free or have a free plan.

4 tools · Listings checked up to Nov 12, 2026 · Where the facts come from

How each one differs from Omnisend

  1. Mautic

    Open source marketing automation you can self-host

    • Mautic starts at €247.50 per month, billed annually (€275 billed quarterly). Omnisend starts at $16 per month for up to 500 contacts, billed monthly.
    • Mautic is open source and self-hostable, according to its own site.
    • Omnisend also covers forms and reports.
    Mautic pricing and details

  2. Groundhogg

    Flat-rate CRM and email marketing plugin for WordPress

    • Groundhogg starts at $20 per month for 1 site, billed annually ($240). Omnisend starts at $16 per month for up to 500 contacts, billed monthly.
    • Omnisend has a free plan. Groundhogg does not, though it has a free trial.
    • Groundhogg is open source and self-hostable, according to its own site.
    • Groundhogg also covers sales pipeline and AI agents.
    Groundhogg pricing and details

  3. Ghost

    Open source publishing with newsletters and paid memberships

    • Ghost starts at $15 per month for up to 1,000 members, billed yearly ($18 billed monthly). Omnisend starts at $16 per month for up to 500 contacts, billed monthly.
    • Omnisend has a free plan. Ghost does not, though it has a free trial.
    • Ghost is open source, according to its own site.
    • Ghost also covers paid newsletters.
    Ghost pricing and details

  4. listmonk

    Free self-hosted newsletter and mailing list manager

    • listmonk is free. Omnisend starts at $16 per month for up to 500 contacts, billed monthly.
    • listmonk is open source and self-hostable, according to its own site.
    • listmonk also covers transactional email.
    • Omnisend also covers marketing automation, forms and reports.
    listmonk pricing and details

Common questions

Is there an open-source alternative to Omnisend?

Yes. Mautic, Groundhogg, Ghost and listmonk are open source, according to their own sites.

Is Omnisend open source?

Omnisend is not described as open source on its own site. The listing was checked on Oct 17, 2026 against the pages it cites.

Which of these email marketing and newsletter tools are free?

Mautic and listmonk are free or have a free plan.

When was this checked?

Each listing shows its own date. On this page they run from Oct 17, 2026 to Nov 12, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Omnisend: the alternatives its listing names first, then the tools that share the most features with it.