The 15-Minute Sovereign Mail Server. Your Inbox. Your AWS. Zero Maintenance.

Deploy a production-ready, JMAP-compliant mail server on your own infrastructure in under 15 minutes. Pure serverless scaling with proactive SES reputation protection.

Join the Alpha (Free for Developers) View the Architecture
Trust & Architecture

Private by Design, Open by Principle

Trust is the most important feature of any mail server. That’s why ServerlessInbox follows an “Open Core” model where the infrastructure is transparent.

All deployment logic, including our CDK and CloudFormation templates, is open source and fully auditable. You can see exactly how your data flows, how it’s stored in S3, and how it’s indexed in DynamoDB. Your mail never touches our servers because there are no “our servers.”

  • The 'Your Side' Promise:: 100% of your data stays in your AWS account. We provide the logic; you provide the cloud.
  • Open Core Transparency:: The deployment scripts (CDK/CloudFormation), Admin UI, and API wrappers are Open Source. Only the high-performance Go Lambda core is compiled.
  • Full Audit Logs:: Every action, every bounce, and every login is logged in your own CloudWatch/S3 for total oversight.
...

The speed and reliability of a managed service without the maintenance headaches

To ensure maximum performance and security, our core JMAP logic is distributed as optimized, pre-compiled Go binaries. This approach allows us to deliver a “Zero-Ops” experience

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SES Reputation Management

Built-in Guardrails for Your Domain Reputation

The biggest fear of any self-hosted mail setup is “burning” your domain. ServerlessInbox removes the complexity of Amazon SES by providing an automated reputation management system.

Our Admin API automates Route53, SPF, DKIM, and DMARC setup to ensure inbox delivery. It proactively handles bounces and complaints to protect your SES reputation.

For bulk mailing, it's your safety net: automated feedback loops and real-time monitoring keep your domain healthy—with pro-grade deliverability inside your VPC.

  • Automatic Guardrails:: Built-in handling for bounces and complaints. Don’t get banned by Amazon for a bad CSV list.
  • Infrastructure Automation:: Full Route53, SPF, DKIM, and DMARC setup via the Admin API.
  • Domain Safety:: (Coming Soon) Advanced bulk-mail pacing and reputation “warming” to ensure your primary domain stays clean.
The Features

What Makes Us Special

ServerlessInbox is fully API-driven and JMAP-native, no legacy IMAP. Your inbox speaks JSON, perfect for AI agents, web apps, or custom tools. With SDKs in multiple languages, you can easily manage mailboxes, threads, and attachments without old-protocol overhead.

Discover Our Awesome Features

Hover over a feature to learn more about it

100% API Driven

100% API Driven

Everything—from creating accounts to sending mail—is a REST or JMAP call.

Infinite Scaling

Infinite Scaling

No EC2 instances. From 1 to 1,000,000 emails, AWS Lambda handles it all.

Bring Your Own Identity

Bring Your Own Identity

Connect your existing OAuth provider (IDP). No need for another password database.

Developer SDK's

Developer SDK's

Generated clients in Python, TS, Go, and more.

Shared Accounts

Shared Accounts

Collaborative inboxes for teams, built-in.

Feature 6

Feature 6

Description for feature 1.

It’s 100% serverless, you pay only for what you use.

The system auto-scales from 10 emails a month to 10 million with zero server management. Built-in OAuth/OIDC support lets you use your own Identity Provider for precise access control.

100% API-Driven Infrastructure.

A Modern Stack for Developers Who Build.

The Alpha Deal

Get Lifetime Pro Benefits for Helping Us Stress-Test the Future.

We are looking for early adopters, developers, and privacy enthusiasts to help us push ServerlessInbox to its limits.

During our Alpha phase, we are offering a unique “Founder’s Deal.” Those who join now and help us refine the deployment process will receive a lifetime license for our Pro tier once we officially launch. It’s a 15-minute test that nets you a permanent, sovereign mail solution.

Free for Developers

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Free for Developers

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Learn More
Free for Developers

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Plans & Pricing

Choose the right plan for you

We believe the “single user” experience should stay free—making ServerlessInbox the perfect choice for personal portfolios and dev projects.

Our licensing model is designed to be sustainable yet accessible. As you scale to multiple accounts, shared team inboxes, or advanced features like Sieve scripts and JMAP Calendar support, our Basic and Premium tiers provide a clear path for growth.

Single

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Free

Free

Join the Alpha

This plan includes:

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Professional

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$25.00 / month

$21.50
14% $25.00
/ month

Coming soon

This plan includes:

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Enterprise

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$49.00 / month

$38.00
22% $49.00
/ month

Coming soon

This plan includes:

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No Lock-in!

Your mail is yours to keep and use. Free forever. No lock-in!

The 'Anti-Lock-In' Guarantee: If your license expires, basic mail delivery and sending for all your accounts will not stop. We only disable optional advanced features (like Sieve/Calendar) after a grace period. Your communication is yours to keep and use.
Roadmap: Beyond the Inbox

Bulk Mail, Contacts, and Calendar are Coming Soon.

The alpha release is just the beginning. Our mission is to provide a full-spectrum communication suite that runs entirely on your own AWS stack.

The Sovereign Foundation (Alpha)
Owning the Core and Perfecting the 15-Minute Deploy.
Establish the bedrock of your private email by perfecting the core JMAP engine on AWS. We’re prioritizing a rock-solid, 15-minute deployment that keeps 100% of your data sovereign. Early adopters will help fine-tune the Go-powered core and Admin UI for a seamless, 'Zero-Ops' experience.
Reputation & Scale (Bulk Mail)
High-Volume Mailing Without the 'Domain Burn.'
Transform ServerlessInbox into a self-hosted alternative to SendGrid or Mailchimp with automated bulk mail guardrails. Proactive reputation monitoring and SES feedback loops prevent domain 'burn', while DynamoDB-backed list management handles unsubscribes and scaling without high monthly fees.
The Productivity Suite (Contacts & Calendar)
The Sovereign Outlook Replacement.
Move beyond the inbox to create a full Outlook replacement using modern JMAP specifications for Contacts and Calendars. By eliminating clunky legacy protocols, we ensure your meetings and addresses are stored securely in your own S3 buckets, providing enterprise-grade privacy and mobile-native performance.
The Legacy Bridge (IMAP/SMTP)
Connecting the Old World to the New Core.
Bridge the gap between the modern JMAP core and legacy tools that still speak IMAP or SMTP. This stateless proxy allows old WordPress plugins or desktop clients to interact with your sovereign stack without the need for persistent servers, maintaining a pure pay-per-use cost model.
Community-Led Horizon
Your Feedback is the Final Architect.
The final stage turns the roadmap over to you. Whether the future brings AI-driven sorting or multi-tenant whitelabeling for hosting providers, our open-core philosophy ensures the platform evolves based on real-world developer needs. You remain the architect of your own communication ecosystem.
Frequently Asked Questions

Everything You Need to Know

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