Alternatives / AutoSend

10 open-source alternatives

10 Best Open Source AutoSend Alternatives in 2026

Looking for an open source AutoSend alternative? We compared 10 open source email sending and newsletter platforms by license, Amazon SES support, and maintenance. Several rely on SES, so deliverability still depends on your DNS and sender reputation.

Maxime DERAME's profile

Written by Maxime DERAME

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Best AutoSend alternatives at a glance

AlternativeBest forLicense
ListmonkLean newsletter managerAGPL-3.0
Billion MailSelf-hosted SMTP and marketingAGPL-3.0
PlunkMarketing and transactional emailAGPL-3.0
useSendSES-based email APIAGPL-3.0
NotifuseMJML editor and A/B tests (BSL from v40)BSL-1.1 (v40+) / AGPL-3.0 (earlier)
SendportalLaravel email marketingMIT
SessySES event dashboardO'Saasy License
Hyvor RelaySelf-hosted email APIAGPL-3.0 / commercial Enterprise
WrapsReact templates on your SESAGPL-3.0 + enterprise license
Hyvor PostPrivacy-first newslettersAGPL-3.0

How we chose these AutoSend alternatives

We looked for open-source tools that send transactional and marketing email like AutoSend. We verified each project's license, recent activity, stars, and self-hosting in its repository. See our methodology for the full criteria.

Newsletters and campaigns

Listmonk is a lean single binary for newsletters with a transactional API. Notifuse offers a visual MJML editor and A/B tests, Sendportal is a Laravel-based tool, and Hyvor Post is a privacy-first newsletter platform with no tracking.

Email APIs

Hyvor Relay is a self-hosted email API with DNS automation and webhooks. Plunk combines marketing and transactional email, useSend is an SES-based platform with an SMTP relay, and Wraps builds React templates deployed to your SES. Billion Mail includes its own SMTP server.

Important: SES and licenses

Sessy only tracks SES events and sends nothing. Notifuse uses the Business Source License from version 40. Sessy uses the O'Saasy License. Hyvor Relay has a costly Enterprise tier.

License details

Listmonk, Plunk, useSend, Hyvor Relay, Hyvor Post, Billion Mail, and Wraps are AGPL-3.0. Sendportal is MIT.

Maintenance status

Most had commits within weeks of this update.

Why look for a AutoSend alternative?

AutoSend is a proprietary email service billed by volume. Open-source tools avoid platform fees and keep data in your account, but you manage SPF, DKIM, and DMARC and often an Amazon SES account.

listmonk.app
1

Listmonk

High-performance newsletter manager with a transactional email API

AGPL-3.0 self-hosted newsletter and mailing-list manager built around PostgreSQL. It supports campaigns, subscribers, segmentation, templates, analytics, bounce handling, multiple SMTP providers, OIDC, S3-compatible media, and a transactional email API; it does not provide delivery infrastructure itself.

23.9K2.7KAGPL-3.0Self-hosted

Pricing: Free self-hosted software; connect an SMTP provider or mail server.

  • High-performance single binary with PostgreSQL
  • Campaigns, subscribers, segmentation, templates, and analytics
  • Transactional API, multiple SMTP servers, bounce handling, and OIDC
  • Newsletter-first rather than API-first
  • Requires an external SMTP provider or mail server
  • Less focused on developer experience and React Email than Resend
billionmail.com
2

Billion Mail

Self-hosted SMTP mail server with campaigns and analytics

AGPL-3.0 self-hosted email platform combining SMTP infrastructure with newsletters, marketing campaigns, analytics, domain configuration, and campaign management. It uses components such as Postfix, Dovecot, and Rspamd, so it operates more of the delivery stack than a provider-backed email API.

15.9K1.8KAGPL-3.0Self-hosted

Pricing: Open-source self-hosted platform.

  • Includes SMTP infrastructure and campaign tooling
  • Newsletters, analytics, and domain management
  • SPF, DKIM, and DMARC guidance with no built-in sending limit
  • More infrastructure to operate than Resend
  • Deliverability and sender reputation are your responsibility
  • Recent commit cadence is slower than some newer projects
useplunk.com
3

Plunk

Self-hosted transactional and marketing email platform

AGPL-3.0 email platform combining transactional API delivery, SMTP relay, campaigns, automations, contacts, segments, inbound email, analytics, custom domains, and SPF/DKIM setup. Can be self-hosted or used through a managed service.

5.5K421AGPL-3.0Self-hosted

Pricing: Self-hosted open-source platform with hosted service available.

  • Transactional API and SMTP relay
  • Campaigns, contacts, automations, and segmentation
  • Inbound email, analytics, custom domains, and self-hosting
  • Smaller ecosystem than Resend
  • Marketing features may be unnecessary for transactional-only teams
  • Self-hosting still requires a delivery provider or operating infrastructure
usesend.com
4

useSend

Resend-style email platform powered by Amazon SES

AGPL-3.0 self-hosted email platform built around Amazon SES, with transactional API, SMTP relay, marketing campaigns, contacts, visual editor, delivery logs, open/click tracking, bounce tracking, suppressions, analytics, and TypeScript, Python, Go, and PHP SDKs.

4.7K440AGPL-3.0Self-hosted

Pricing: Self-hosted open-source layer; Amazon SES usage and AWS infrastructure are billed separately.

  • Amazon SES backend with transactional API and SMTP relay
  • Campaigns, contacts, logs, analytics, bounces, and suppressions
  • Multiple SDKs and self-hosting
  • Depends on Amazon SES and AWS configuration
  • Not an independent delivery network
  • Smaller ecosystem than Resend
notifuse.com
5

Notifuse

Open-source transactional and marketing email platform

Self-hosted platform (Business Source License 1.1 from v40, AGPL-3.0 for earlier versions) for transactional email and marketing, including newsletters, visual MJML editing, A/B testing, segmentation, contact timelines, multiple workspaces, analytics, REST API, S3 integration, and multiple sending providers.

2.3K239BSL-1.1 (v40+) / AGPL-3.0 (earlier)Self-hosted

Pricing: Open-source self-hosted platform; configure a supported sending provider.

  • Transactional API and newsletter campaigns
  • Visual MJML editor, A/B testing, segmentation, and analytics
  • Multiple sending providers, workspaces, and self-hosting
  • More marketing-oriented than Resend
  • Business Source License from v40, source available until it converts to AGPL
  • Requires an underlying email sending provider
sendportal.io
6

Sendportal

Laravel-based self-hosted email marketing platform

MIT self-hosted email marketing application built with Laravel, providing subscriber management, lists, segments, campaigns, tracking, workspaces, templates, and an API. It requires an external sending provider and has low recent development activity.

2.2K470MITSelf-hosted

Pricing: MIT self-hosted software; connect an email sending provider.

  • Laravel-based MIT project
  • Subscribers, lists, segments, campaigns, and workspaces
  • Tracking, REST API, and self-hosting
  • Low recent development activity
  • Marketing-first, not a direct transactional API replacement
  • Requires an external sending provider
sessy.dev
7

Sessy

Self-hosted observability dashboard for Amazon SES

Self-hosted SES event dashboard that captures delivery, bounce, complaint, open, click, reject, and delay events and exposes searchable logs and analytics. It does not send email or replace SES. Current versions use the O'Saasy License, a source-available rather than OSI-approved open-source license.

94245O'Saasy LicenseSelf-hosted

Pricing: Source-available self-hosted software; review current license terms.

  • Searchable SES events for deliveries, bounces, complaints, opens, and clicks
  • Reputation monitoring, multiple projects, and analytics
  • SQLite or PostgreSQL, Docker, and MCP server
  • Not an email sending API
  • Requires Amazon SES
  • Source-available license and no campaign/template replacement
relay.hyvor.com
8

Hyvor Relay

Self-hosted transactional email API and SMTP infrastructure

AGPL-3.0 email API and SMTP infrastructure with DKIM and SPF management, bounce processing, suppression handling, webhooks, logs, project isolation, monitoring, Prometheus/Grafana, Docker, and horizontal scaling. Commercial Enterprise licensing is also available.

91865AGPL-3.0 / commercial EnterpriseSelf-hosted

Pricing: AGPL-3.0 self-hosting with a separate Enterprise license available.

  • REST email API and own SMTP infrastructure
  • DKIM, SPF, bounces, suppressions, and webhooks
  • Logs, multi-tenancy, Prometheus/Grafana, Docker, and scaling
  • More infrastructure responsibility than Resend
  • You own deliverability and reputation
  • Smaller ecosystem and Enterprise license may be needed
wraps.dev
9

Wraps

Developer email platform on your own AWS account.

Wraps is a developer-friendly email platform where templates are React components and automations are written in TypeScript, deployed to your own AWS account with SES. The code is AGPL-3.0 with enterprise features under a commercial license, and AWS charges about $0.10 per 1,000 emails. It is a very young project.

648AGPL-3.0 + enterprise licenseSelf-hosted

Pricing: Free to start; AWS usage is billed to your account, and enterprise features are paid.

  • Email as React components and TypeScript automations
  • Runs in your own AWS account
  • AGPL-3.0 core
  • Requires an AWS account
  • Very young project with about 63 stars
post.hyvor.com
10

Hyvor Post

Privacy-first newsletter platform with no engagement tracking

AGPL-3.0 newsletter platform built on Hyvor Relay, focused on sending without open, click, location, or behavioral tracking. It includes subscriber lists, signup forms, templates, archive websites, team collaboration, and a management API.

333AGPL-3.0Self-hosted

Pricing: Open-source self-hosted newsletter platform built on Hyvor Relay.

  • Newsletter delivery without engagement tracking
  • Double opt-in, signup forms, lists, and archive sites
  • Team collaboration, API, and Hyvor Relay integration
  • Very small community and young project
  • Newsletter-focused rather than transactional API
  • Built around Hyvor Relay

Compare AutoSend alternatives

AlternativeTypeLicenseSelf-hostedBest for
ListmonkNewsletter managerAGPL-3.0YesNewsletters
Billion MailEmail serverAGPL-3.0YesOwn mail server
PlunkEmail platformAGPL-3.0YesClosest replacement
useSendEmail APIAGPL-3.0YesTransactional email
NotifuseEmail platformBSL-1.1 (v40+)YesCampaigns
SendportalEmail marketingMITYesLaravel users
SessyEvent trackerO'Saasy LicenseYesTracking SES
Hyvor RelayEmail APIAGPL-3.0 + EnterpriseYesReplacing SES
WrapsEmail platformAGPL-3.0AWS accountTypeScript teams
Hyvor PostNewsletter platformAGPL-3.0YesNo-tracking newsletters

Which one should you choose?

Want a self-hosted email API

Hyvor Relay has DNS automation and real-time webhooks.

Hyvor Relay

Want marketing plus transactional

Plunk covers marketing, transactional, and broadcast email.

Plunk

Want newsletters at low resource cost

Listmonk is a single binary backed by Postgres.

Listmonk