Answered the same email twice? The solution: a team inbox.
Astreo brings info@, support@ & co. to your whole team: assign emails, discuss internally and reply together. GDPR-compliant, operated in the EU.
The new version arrives in a few weeks · No email migration required
“Who is actually answering this right now?”
When several people work with forwards and CC, the overview is quickly lost: who is taking care of which email? Has a reply already been sent? Astreo creates clear responsibilities directly in the shared mailbox.
Without a clear assignment it remains open who takes on a request and handles it.
If several people work on an email at the same time, replies can be sent twice.
With forwards and CC it is hard to tell which requests are still open or waiting for a response.
Teamwork right inside the mailbox
A shared mailbox with clear responsibilities, internal coordination and secure email handling. Clearly laid out, without helpdesk ballast.
PGP and S/MIME
Sign emails, verify signatures and send and receive encrypted. WKD supports the lookup of public keys.
Assign and handle
Every conversation gets a clear owner. “Assigned to me” shows every user their own cases.
Internal coordination
Coordinate directly on the email thread. Internal messages stay invisible to the sender and the recipients of the email.
Collision detection
Astreo shows when someone is already working on an email. That is how duplicate replies are avoided.
Server-side filters
Rules are applied on the server and therefore work regardless of the device in use.
AI support
Reply suggestions, translations and grammar checking support your writing. Results remain editable drafts and are not sent automatically.
Several mailboxes and email threads
Connect Microsoft mailboxes via OAuth and further mailboxes via IMAP/SMTP. Astreo groups related messages into one email thread.
Fast full-text search
Find emails and email threads across connected mailboxes in a fraction of a second.
What makes everyday email work easier
Manage signatures per mailbox and insert them automatically while writing.
Save recurring email texts as a template and insert them quickly while composing.
Manage groups of recipients and reach them together under one name.
Set up automatic replies per mailbox and for defined periods.
Manage contacts and groups and select them directly while writing.
Plan appointments right next to the mailbox and keep them in view.
Block unwanted senders for the respective mailbox directly from an email.
Match the appearance to the system automatically or choose it manually.
Attachments are checked automatically for malware with ClamAV.
Astreo compared with other solutions
Astreo combines the central functions for shared email handling with EU operation and existing Microsoft or IMAP mailboxes.
| Astreo | Front / Missive | Outlook Shared Mailbox | |
|---|---|---|---|
| Billing | 19 € per user | 22-60 € per user | part of the M365 plan |
| Assignment & chat | ✓ | ✓ | - |
| Collision detection | ✓ | ✓ | - |
| EU hosting | ✓ | US cloud | depends on tenant |
| No email migration required | ✓ | - | - |
| REST API · Webhooks · MCP | ✓ | partial | Graph |
Feature comparison based on publicly available product information, as of August 2026. Features and prices of the providers named may change.
Astreo pricing
One price per user. Choose the Astreo plan that suits the way you work.
- ✓Unlimited personal and shared mailboxes
- ✓Assign emails and work on them together
- ✓Internal chat right on the email thread
- ✓Collision detection
- ✓Escalations and team reporting
PGP and S/MIME, AI, REST API, webhooks and MCP are not included.
Join the waiting list- ✓All features of Astreo Team Inbox Starter
- ✓AI reply suggestions and translations
- ✓PGP and S/MIME
- ✓REST API and webhooks
- ✓MCP server
- ✓Several mailboxes and email threads
- ✓Server-side filters & rules
- ✓Signatures, email templates and out-of-office replies
- ✓Microsoft (OAuth) and IMAP
- ✓Virus protection
- ✓Operation in the EU with backups, updates and system monitoring
Prices of the current version. Plans and features may change with the new version.
With yearly payment you use Astreo for twelve months at the price of ten monthly instalments.
All prices are net, plus statutory VAT. Astreo is addressed exclusively to businesses.
Features and services at a glance
Compare what Astreo Team Inbox Starter and Astreo Team Inbox include.
| Feature | Astreo Team Inbox Starter12 € per user/mo | Astreo Team Inbox19 € per user/mo |
|---|---|---|
| Mailbox & everyday work | ||
| Several mailboxes, email threads and sending | ✓ | ✓ |
| Server-side filters & rules | ✓ | ✓ |
| Signatures and out-of-office replies | ✓ | ✓ |
| Use email templates | ✓ | ✓ |
| Email distribution lists | ✓ | ✓ |
| Contacts and calendar | ✓ | ✓ |
| Microsoft (OAuth) and IMAP | ✓ | ✓ |
| Virus protection | ✓ | ✓ |
| PGP and S/MIME encryption | — | ✓ |
| AI & interfaces | ||
| AI replies, translations and text correction | — | ✓ |
| REST API | — | ✓ |
| Signed webhooks | — | ✓ |
| MCP server for AI agents | — | ✓ |
| Team collaboration | ||
| Shared mailboxes | ✓ | ✓ |
| Assign emails | ✓ | ✓ |
| Internal chat | ✓ | ✓ |
| Collision detection while replying | ✓ | ✓ |
| Share email threads and send from shared addresses | ✓ | ✓ |
| Team reporting on response and handling times | ✓ | ✓ |
| Audit log with seal chain, available for download | ✓ | ✓ |
| Central sign-in for organizations (SSO/SAML) | Planned | Planned |
| Operation & support | ||
| Operation in the EU with backups, updates and system monitoring | ✓ | ✓ |
| Support | Priority support | Priority support |
| Join the list → | Join the list → | |
Not sure which plan suits your team? We are glad to advise you.
Book an online appointmentData protection and GDPR in focus
Astreo is operated in the EU and helps companies organize shared email mailboxes in a data-protection-compliant way. Clear roles and permissions, documented deletion processes and contractually engaged service providers form the basis for this.
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Hosting in the EU
Astreo and the systems required to run it are hosted in the European Union.
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Processing on our customers behalf
A data processing agreement and documented technical and organizational measures create a clear basis for processing personal data.
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Roles and permissions
Access rights are granted according to the tasks of the users and can be managed within the company.
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Deletion and retention
Defined deletion and retention processes govern how long data is needed and when it is removed.
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Engaged service providers
Service providers used for operation are contractually engaged and documented transparently in the privacy information.
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Technical and organizational measures
Appropriate security measures protect access, systems and the processing of the data.
Integrate Astreo into existing systems
Astreo can be integrated into existing systems and automated workflows via a REST API, signed webhooks and an MCP server. Permissions are granted selectively. Connected systems and AI agents only reach the functions and data released to them.
# 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 })
REST API
Connect Astreo to existing applications and individual workflows through clearly limited access rights.
Signed webhooks
Transmit relevant events securely to connected systems and trigger automated processes.
MCP server for AI agents
Give AI assistants access to released functions through clearly defined permissions and have them prepare reply drafts.
Frequently asked questions
Quick answers to the most common questions about Astreo.
Do we have to migrate our email?
No. Astreo connects your existing Microsoft or IMAP mailboxes. The original emails stay with your current provider. Astreo synchronizes the email data its functions require.
Why can I not try Astreo right now?
We are working on the next version of Astreo and have paused trials and the demo until launch. Join the waiting list and you will be the first to know when it starts. Prefer to talk first? Feel free to book an online appointment.
What happens when I join the waiting list?
You first receive an email to confirm your address. After that we let you know as soon as the new version is ready. No account is created and we need no payment details. You can unsubscribe at any time with one click.
Is our data safe?
Your original emails stay in your Microsoft or IMAP mailbox. So that Astreo can provide search, synchronization and team functions, it processes and stores a server-side copy of the email data required for them. Operation takes place in the EU. The credentials of the connected mailboxes are stored encrypted. Further information on the processing and on the security measures in place can be found in the privacy information.
How is Astreo different from Front or Missive?
Astreo combines assignment, internal coordination and collision detection with EU operation, PGP and S/MIME as well as existing Microsoft or IMAP mailboxes. Front and Missive offer a similar workflow but run in the US cloud. Features and prices of the providers named may change.
Where does the AI in Astreo support us?
Astreo uses Mistral for reply suggestions, translations and grammar and text correction. The source language is detected automatically, and defined style rules can be taken into account when phrasing. All results remain editable drafts and are never sent automatically.
What happens to our data if we cancel?
Your original emails stay in your Microsoft or IMAP mailbox. Data processed for the functions of Astreo is handled according to the agreed retention and deletion periods. You will find the details in the data processing agreement and in the privacy information.
The next version of Astreo is coming. Be among the first.
We are relaunching Astreo. Until launch, trials and the demo are paused. Sign up and you will be the first to know when it starts.
Double opt-in: you confirm your address by email. No account, no payment details.
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