Built for teams that take outbound email seriously.
Mailers.io is the orchestration layer for outbound email — a single control plane across every ESP and SMTP server your team sends through.
Outbound email outgrew one provider.
If your business sends any serious volume, you already know the pattern. One provider is cheap until you hit a cap. Another is reliable until a reputation event hits. A third gives you a region the others don't. So you end up paying multiple vendors and stitching them together with scripts, shared spreadsheets, and hope.
Every team eventually builds the same ugly orchestration layer: a cron job here, a secret there, a dashboard that lies about which provider actually sent the email. We've built that layer enough times to know it shouldn't be homework.
Mailers.io is the version we wished we had. Connect your own providers, route with awareness of quotas and priority, send through one consistent API, and see reporting across all of them in one place. No resell margin. No lock-in. No fiction about deliverability guarantees.
How we think about the product.
Stay in our lane
We are an orchestration layer. We will not pretend to be an ESP, a lead database, or an inbox app. Clarity beats feature creep.
Bring-your-own-providers, always
You keep the provider contracts. We plug into them. Your reputation stays yours, your billing stays yours, your exit stays open.
Built for teams
Workspaces, roles, audit logs, and SSO are not afterthoughts. Outbound volume is risky to share without them.
API and UI, same surface
Every UI action has an API and webhook equivalent. Automation is a first-class citizen, not a paid add-on.
Honest deliverability
We do not guarantee deliverability. We give you the controls that make good deliverability achievable.
Operable by small teams
Simple architecture, predictable pricing, thorough docs. We build what a lean ops team can actually run.
What we'll always do. And what we won't.
We will
- Keep BYOP as the core model, forever.
- Publish changelog and status transparently.
- Surface provider errors verbatim in logs.
- Honour exports, deletions, and DPAs.
- Respond to security questionnaires with specifics.
We won't
- Resell email as a black-box service.
- Sell or enrich subscriber data.
- Build an inbox or reply-management product.
- Promise deliverability we don't control.
- Hide pricing behind sales calls.
Running serious outbound volume deserves serious tooling.
Give your team a control plane across every provider you already use.