Email runs the world. Time it ran like it.
MailBear is an enterprise-class email server and ecosystem, rebuilt from the protocol up — JMAP, HTTP APIs, a database message store, and S3-scale object storage, with AI baked into the core. The reliability ops teams demand, without the museum-piece stack.
Inbox
Synced 0.2s agoInvoice #MB-4821 paid — $48,000.00
Annual platform invoice of $48,000 was paid via ACH and reconciled to the Finance label. No action needed — receipt archived to object storage. Renews Jun 2027.
Hi billing@acme.co,
This confirms payment of your MailBear Enterprise invoice. A copy of the receipt has been attached and indexed for full-text search across your organization.
Thanks for building on modern email.
Email is the backbone of your company. So why does your email stack act like it's 2003?
Every contract, alert, receipt, and decision flows through email. Yet most platforms are a forgotten relic — bolted-on protocols, mystery downtime, and a UI last loved during the flip-phone era. MailBear treats email as what it actually is: critical, modern infrastructure.
A complete email stack, rebuilt from scratch.
We didn't patch the old model — we replaced it. Open standards, modern data systems, and AI that actually ships in the box.
Email that speaks JSON, not 1980s telnet
A full JMAP implementation plus clean HTTP APIs mean email is finally programmable. Build integrations, automations, and apps directly on the protocol — no IMAP scraping, no fragile parsing.
POST https://api.mailbear.io/jmap
{ "using": ["urn:ietf:params:jmap:mail"],
"methodCalls": [["Email/query", { "limit": 20 }]] }
S3-compatible storage
Attachments and message bodies live in S3-compatible object storage — durable, cheap, and effectively infinite. Scale to billions of messages without re-architecting.
A real database, not flat files
A high-performance database backs every mailbox with transactional integrity, instant indexing, and consistent state — the foundation traditional servers never had.
AI that lives in the server, not bolted on the side
Summaries, smart triage, semantic search, and drafting run natively against your message store — governed by your policies, inside your perimeter. No exporting your corpus to a third-party black box just to get a summary.
IMAP4
Standards-compliant IMAP4 for every client you already run.
Calendaring
Native calendars and scheduling, sharing the same modern core.
Org-wide search
Millisecond full-text and semantic search across everything.
Automation
Event-driven rules and webhooks fire on any mailbox change.
One coherent system, from the wire to the object store.
SMTP · HTTP API
Mail and writes come in over open protocols.
Database message store
Transactional, indexed, AI-aware.
S3 object storage
Bodies & attachments at any scale.
JMAP · IMAP4
Clients read and sync over standards.
Priced like infrastructure. Not like a per-seat tax.
Start on a single node, scale to a global fleet. Migration help included on every plan — yes, even from the relic.
Team
For startups standing up modern email on day one.
- JMAP, HTTP API & IMAP4
- 50 GB object storage / mailbox
- AI summaries & search
- Calendaring included
Business
For companies running email as critical infrastructure.
- Everything in Team
- 500 GB object storage / mailbox
- Automation, webhooks & SSO
- Native AI triage & drafting
- Priority migration support
Enterprise
Self-hosted or dedicated, with controls to match.
- Self-host or dedicated cloud
- Bring-your-own S3 & models
- Granular audit logs & RBAC
- Dedicated solutions engineer
If you can call an API, you can build on MailBear.
Every capability in the platform is exposed over clean, documented HTTP and JMAP endpoints. Authenticate, query, stream changes, and ship.
# 1 · get a token export MB_TOKEN=$(mailbear auth login) # 2 · stream new mail as it lands curl -N https://api.mailbear.io/v1/events \ -H "Authorization: Bearer $MB_TOKEN" event: Email/new data: { "id": "M9f3", "from": "ops@acme.co", "summary": "Deploy succeeded ✅" } # 3 · search the whole org, semantically mailbear search "unpaid invoices from Q1" --semantic
Give your email the platform it always deserved.
Modern protocols, real infrastructure, native AI — and a migration crew that does the heavy lifting. Email, treated like it matters.