#1★ TOP PICK
listmonk
Fast, self-hosted newsletter and mailing-list manager in a single binary.
92
OPEN SOURCEAGPL-3.0SELF-HOSTLOCAL-FIRST★ 22k·updated today
listmonk is a self-hosted newsletter and mailing-list manager written in Go, distributed as a single binary backed by PostgreSQL. It handles large lists, subscriber management, custom fields, segmentation, templated campaigns, and click/open analytics, and sends through any SMTP provider you choose (such as Amazon SES, Postmark, or your own relay). It exposes a full HTTP API and a clean admin UI, and is a strong fit for teams and technically comfortable individuals who want to own their subscriber data and keep sending costs to whatever their SMTP provider charges.
Strengths
- +Single Go binary plus PostgreSQL — straightforward to deploy and low on resources
- +Bring your own SMTP provider, so sending cost is decoupled from any one vendor
- +Full REST API, custom fields, segmentation, and template management
- +Actively maintained with a large community (20,000+ GitHub stars)
- +Your subscriber data stays entirely on infrastructure you control
Trade-offs
- −You are responsible for email deliverability, SPF/DKIM/DMARC setup, and an SMTP relay
- −No built-in visual customer-journey/automation builder as deep as Mailchimp's
- −Requires comfort running a server and PostgreSQL — not a click-to-start hosted service
- −AGPL-3.0 imposes source-sharing obligations if you offer a modified version as a network service
Free / self-host (you pay only your server and SMTP-sending costs) #2
Keila
Simple, privacy-friendly open-source newsletter tool.
88
OPEN SOURCEAGPL-3.0SELF-HOSTLOCAL-FIRST★ 2.2k·updated 8 days ago
Keila is an open-source newsletter application built in Elixir/Phoenix, designed to be a straightforward, privacy-conscious way to send campaigns and manage subscribers. It supports segmentation, templates, a form builder, and sending through providers like Amazon SES, Mailgun, Postmark, or plain SMTP. It is aimed at creators, small organizations, and anyone who wants a clean self-hosted newsletter tool without the complexity of a full marketing-automation suite; a paid managed cloud is also offered by its maintainers for those who prefer not to self-host.
Strengths
- +Clean, focused UI that is quick to learn for non-technical senders
- +Bring your own sending provider (SES, Mailgun, Postmark, SMTP)
- +GDPR-conscious design with double opt-in and self-owned subscriber data
- +Docker-based deployment and an optional hosted cloud if you don't want to self-host
Trade-offs
- −Smaller project and community than listmonk or Mautic
- −Fewer advanced automation and reporting features than heavyweight platforms
- −You still handle deliverability and an external sending provider when self-hosting
- −AGPL-3.0 network-copyleft obligations apply to modified network deployments
Free / self-host; optional paid managed cloud from the maintainers #3
Mautic
Full open-source marketing automation platform.
84
OPEN SOURCEGPL-3.0SELF-HOSTLOCAL-FIRST
Mautic is a mature open-source marketing-automation platform (PHP/Symfony) that goes well beyond newsletters, offering contact management, segmentation, visual campaign/journey builders, landing pages, forms, lead scoring, and multi-channel messaging. It is the closest open-source counterpart to Mailchimp's higher tiers for teams that need automation depth, and it sends through your chosen SMTP or transactional provider. It rewards organizations willing to run and maintain a more substantial application in exchange for owning their data and automation stack.
Strengths
- +Closest open-source match to full marketing automation and customer journeys
- +Landing pages, forms, lead scoring, and multi-channel campaigns built in
- +Large, established community and plugin ecosystem
- +Self-hosted, so contacts and automation logic stay on your infrastructure
Trade-offs
- −Heavier PHP/Symfony stack with more moving parts to install and maintain
- −Steeper learning curve than a simple newsletter tool
- −Deliverability and an external sending provider are still your responsibility
- −Ongoing upkeep (updates, cron, queues) is more demanding than a single-binary app
Free / self-host; optional paid managed hosting from third parties #4
phpList
Long-standing open-source newsletter manager for large lists.
82
OPEN SOURCEAGPL-3.0SELF-HOSTLOCAL-FIRST
phpList is one of the longest-running open-source newsletter applications (PHP/MySQL), built specifically for sending campaigns to large subscriber lists. It supports list management, segmentation, templates, bounce handling, and detailed sending controls, and works with any SMTP provider. It suits organizations and nonprofits that want a proven, no-frills self-hosted newsletter system and don't mind an interface that feels more utilitarian than modern SaaS tools; a paid hosted version is also available from the phpList team.
Strengths
- +Mature, battle-tested project focused squarely on sending to large lists
- +Solid bounce handling and fine-grained sending/throttling controls
- +Runs on a common PHP/MySQL stack that most shared hosts support
- +Self-hosted with full ownership of subscriber data
Trade-offs
- −Interface and workflows feel dated compared with modern tools
- −Limited built-in automation and visual journey building
- −You manage deliverability, an SMTP path, and PHP/MySQL upkeep yourself
- −Smaller active contributor base than the largest projects in this space
Free / self-host; optional paid hosted plans from phpList