Answered the same email twice? The fix: a team inbox.
Astreo brings info@, support@ & co. to your whole team: assign, discuss internally, reply together — GDPR-compliant, hosted in the EU.
No credit card · your mailboxes stay where they are (Gmail · Microsoft · IMAP) · self-hostable anytime
Real interface at app.astreo.de — assignment, internal notes, collision detection, AI replies.
“Who's actually answering this right now?”
Running shared mailboxes on forwards and CC is error-prone. Outlook shared mailboxes barely do better. And Front or Missive solve it — in the US cloud, overloaded for small teams.
Double-answered emails, forgotten threads, no overview. CC is not a workflow.
Outlook shared mailbox: no real assignment, no collision detection, no notes, weak search.
Front/Missive can do it — but in the US cloud and overloaded for a small team.
Everything to bring `info@` to your team
Shared inbox, server power and an open foundation — without helpdesk bloat.
Assign & own
Every conversation gets an owner. “Assigned to me” shows each person exactly their tasks.
Internal notes
Discuss right on the email — visible internally only, never to the sender. No more parallel chats.
Collision detection
Astreo shows live when someone is already writing on an email. No more duplicate replies.
Server-side filters
Rules apply on the server — so in all your clients, not just Astreo. Spam gone in one click.
AI that helps
Reply suggestions, translation, grammar — always an editable draft, never auto-sent. Bring your own API key.
Multi-account & threading
Gmail, Microsoft & IMAP via OAuth — any number of mailboxes, clean threading and fast full-text search.
Per account, with placeholders — inserted automatically.
Snippets for recurring replies — one click.
Maintain groups and reach many with a single name.
Out-of-office & auto-replies per account — scheduled.
Address book with groups — pick recipients straight from the directory.
Appointments at a glance, right next to your inbox.
Block senders in one click — server-side, permanent.
Follows the system or toggle by click — via design tokens.
Attachments are automatically scanned for malware (ClamAV).
Same workflow. Lean and EU-hosted.
What Astreo does differently — at a glance.
| Astreo | Front / Missive | Outlook Shared | |
|---|---|---|---|
| Billing | Package price for the team | per seat | part of M365 |
| Assignment & notes | ✓ | ✓ | — |
| Collision detection | ✓ | ✓ | — |
| EU hosting | ✓ | US cloud | depends on tenant |
| Open-core / self-hostable | ✓ | — | — |
| REST API · Webhooks · MCP | ✓ | partial | Graph |
Feature comparison; as of 2026.
One package price for the whole team
No per-seat tariff. You pay by team size — the per-seat price drops as you grow.
- ✓Shared inbox + assignment
- ✓Internal notes & presence
- ✓AI, filters, templates
- ✓Everything in Team S
- ✓Thread sharing & send-as
- ✓Reporting (response time/SLA)
- ✓Priority support
- ✓Everything in Team M
- ✓~5.95 €/seat
- ✓API · Webhooks · MCP
- ✓Everything in Team L
- ✓~4.98 €/seat
- ✓SSO/SAML as an option
More than 50 seats? Talk to us. · Annual billing with a discount available.
Which edition fits you?
The same client — three ways to use it: from free self-hosting to the fully managed team solution.
| Feature | CommunitySelf-host · free | Managed Personal5 €/mailbox/mo | Teamfrom 39 €/mo |
|---|---|---|---|
| Mailbox & everyday | |||
| Multi-account, threading, sending | ✓ | ✓ | ✓ |
| Server-side filters & rules | ✓ | ✓ | ✓ |
| Signatures, templates, lists, auto-responder | ✓ | ✓ | ✓ |
| Contacts, calendar, themes | ✓ | ✓ | ✓ |
| Gmail / Microsoft / IMAP (OAuth) | ✓ | ✓ | ✓ |
| Virus protection (ClamAV) | ✓ | ✓ | ✓ |
| AI & interfaces | |||
| AI (reply, translation, grammar) | ✓ your own key | ✓ your own key | ✓ |
| REST API + Webhooks | ✓ | ✓ | ✓ |
| MCP server (AI agents) | ✓ | ✓ | ✓ |
| Team collaboration | |||
| Shared inbox: assignment & internal notes | — | — | ✓ |
| Collision detection (presence) | — | — | ✓ |
| Thread sharing & send-as | — | — | ✓ |
| Reporting (response time / SLA) | — | — | ✓ |
| SSO / SAML | — | — | Option |
| Operations & support | |||
| Operated by us (EU, backups, updates, monitoring) | — | ✓ | ✓ |
| Support | Community | Best-effort | Priority |
| License | AGPL (open) | hosted | hosted |
| Self-host → | Try it → | Start Team → | |
The full client is open source (AGPL) and self-hostable anytime. Team features are the commercial module — hosted by us. Self-hosting the team features for strict compliance is available on request.
Your email. In Europe. No lock-in.
Astreo runs in the EU. OAuth tokens and credentials are stored encrypted at rest. Email content is never logged. And because the core is open (AGPL), you can audit the code — or self-host Astreo anytime. No vendor lock-in, ever.
- ●EU hosting & GDPR — no US cloud, no data sharing.
- ●Encrypted at rest — tokens & passwords with AES-256-GCM.
- ●Open-core (AGPL) — auditable, self-hostable, no lock-in.
- ●No provider switch — Astreo is a client; your mailboxes stay where they are.
Not a walled garden. AI-agent ready.
Astreo is open at the edges: a REST API with scoped tokens, signed webhooks for automation, and an MCP server through which AI assistants can read your inbox and propose drafts — never auto-send. All on the same scoped view: an agent sees only what it is allowed to.
# Fetch unread threads curl https://app.astreo.de/api/v1/threads?unread=1 \ -H "Authorization: Bearer astreo_pat_…" # AI agent (MCP) proposes drafts — # but never sends automatically. mcp.call("draft_reply", { thread_id })
Frequently asked questions
Quick answers to the most common questions about Astreo.
Do we have to migrate our email?
No. Astreo is a client, not a provider switch. You connect Gmail or Microsoft via OAuth — or any other mailbox via IMAP. Your email stays where it is.
Is our data safe?
Astreo is hosted in the EU, credentials are stored encrypted at rest (AES-256-GCM), email content is never logged. The core is open source — you can audit the code or self-host Astreo.
How is Astreo different from Front or Missive?
Same core workflow (assignment, notes, collision detection) — but as an affordable package price instead of per-seat billing, EU-hosted instead of US cloud, and open-core instead of lock-in. Lean instead of overloaded.
What does the AI cost?
You bring your own API key (Anthropic, OpenAI/OpenRouter, DeepSeek …). That keeps AI costs transparent and on your side — no hidden markup. AI output is always an editable draft, never auto-sent.
Can we self-host Astreo?
Yes. The Community edition (full client, AGPL) is free to self-host. We operate the team features hosted; for strict compliance, self-hosting the team features is available on request.
Bring your `info@` to your team — today.
Try it free, no credit card. Connected in minutes, self-hostable anytime.