Open Source Amazon SES Alternatives
A curated collection of the 2 best open source alternatives to Amazon SES.
The best open source alternative to Amazon SES is Billion Mail. If that doesn't suit you, we've compiled a ranked list of other open source Amazon SES alternatives to help you find a suitable replacement. Other interesting open source alternative to Amazon SES is Hyvor Relay.
Amazon SES alternatives are mainly Marketing & Customer Engagement but may also be Email & Communication. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Amazon SES.
Self-hosted mail server and email marketing platform for businesses that want to send newsletters and campaigns without a third-party provider.
BillionMail combines a mail server with a campaign platform, so newsletters, promotional mail and transactional messages all leave from infrastructure you own. It removes the per-contact monthly bill and the sending caps that come with hosted marketing services.
Installation is a single shell script or a Docker Compose file, and the project puts eight minutes between the install and a first successful send. After that you add the sending domain, verify its DNS records and let the installer switch on free SSL, then write the campaign and pick a list and a send time.
The running system covers the marketing side as well as the mail side.
- Unlimited sending: no restriction on how many messages you push through your own server.
- Campaign analytics: delivery, open rates and click-through rates tracked for each send.
- Reusable templates: professional marketing templates you customize once and use again.
- Webmail included: RoundCube is integrated and reachable from a path on the same install.
- Management script: a bm command prints default logins, shows DNS records and applies updates.
A live demo with public credentials is available for anyone who wants to look before installing, and aaPanel offers a one-click Docker install for its users. Nothing is forwarded to a third party, so contact lists and open tracking stay on the machine you control.
A self-hosted email API that sends through your own SMTP infrastructure, built for developers who need deliverability control and detailed send logs.
Hyvor Relay is an email API you run on your own servers. It sends over SMTP from your infrastructure and your addresses, which puts deliverability and IP reputation in your hands rather than a vendor's, while still giving developers the simple send endpoint they expect.
The stack splits by job. PHP with Symfony runs the API backend, Go handles email workers, webhook delivery, the DNS server, and the incoming SMTP server as a single binary, SvelteKit and the Hyvor Design System build the frontend, and PostgreSQL serves as both database and queue. Deployment is Docker Compose or Swarm.
Running your own mail path means handling the parts a provider normally hides.
- Deliverability handling: greylisting, retries, bounces, feedback loops, and suppressions are managed automatically.
- Queue separation: transactional and distributional mail sit in separate queues to protect IP reputation.
- DNS automation: delegate DNS to the built-in server instead of maintaining records by hand.
- Multi-tenancy: tenants get scoped access and each holds isolated projects, which fits agencies and larger organizations.
- Observability: send logs and full SMTP conversations are kept for 30 days, alongside Prometheus metrics and Grafana dashboards.
- Webhooks: HTTP callbacks report email events to your own systems.
Health checks watch performance and deliverability, and scaling means adding more servers and IP addresses as volume grows. The license is AGPL 3.0, with enterprise licensing offered to organizations that need commercial terms or cannot comply with it.
