Mailcheap
A newsletter tool where you pay for the emails you send, not for dormant subscribers.
Similar open source projects
All Mailchimp alternatives-
listmonk
A self-hosted newsletter and mailing list manager in a single app.
Alternative to Mailchimp, Klaviyo
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BillionMail
A self-hosted mail server with newsletters and email marketing.
Alternative to Mailchimp
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Notifuse
A self-hosted newsletter, email marketing and transactional email platform with a visual email editor.
Alternative to Mailchimp
-
Mautic
Marketing automation: email campaigns, landing pages and lead scoring.
Alternative to HubSpot, Klaviyo
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Ghost
A publishing platform for blogs and paid newsletters.
Alternative to Substack, Medium
About these numbers. Stars, dates and licenses come from GitHub through ecosyste.ms, collected on 10 Nov 2026; they can lag GitHub by a few days. A project is listed only if it has 300 or more stars, was updated in the last 12 months and states a license. A listing is not an endorsement, and we have not tested these tools on Antideploy yet. Logos belong to their projects and companies and are shown only to say which is which.