Feels familiar. Belongs to you.¶
Mail, calendar, contacts, tasks, team chat, the company phone and documents – in one app, in the browser and on the phone. Your data stays with you, and ten people cost as much as one.
Mail · light and dark
An inbox that thinks along¶
Categories like "In progress" and "Waiting for reply", rules for the whole team, search like in Gmail. Send later or snooze a mail until it's due – and a warning when a sender only pretends to be your bank. Light or dark, as you like it.
Shared mailboxes
info@ belongs to the whole team¶
info@ and rechnung@ (billing) sit right below everyone's own mailbox, for everyone who needs them. Everyone sees what's done and who is on it – and replies as info@ straight away.
Writing
Replies in seconds¶
Format, quote, pick the right sender. Snippets for the questions that come every day, and a company signature that looks the same for everyone.
Calendar
One calendar for the whole team¶
Day, week, month. Site visits, customer appointments and team meetings in one place, invitations answered with one click, a video meeting on any appointment.
Who's free?
No more "Does Tuesday work for you?"¶
Add colleagues to an appointment – Kontext shows at once who is busy and suggests the next time everyone can make it. Like in Outlook, just without Outlook.
Contacts
The customer at a glance¶
One click on a customer shows their latest mails, the next appointments, open tasks and calls. A small CRM, without another program.
Phone
The phone rings – and you already know what it's about¶
Your Fritzbox and your numbers stay. A call rings in Kontext with the caller's name, company and latest mail. Call with one click, voicemail arrives as a mail, a missed call becomes a task.
Tasks
A mail becomes a task¶
As a list or a Kanban board, for every mailbox. From a mail, a chat message or a missed call with one click, with a reminder on your phone.
Team chat and video
The office group chat – and it's yours¶
Channels and direct messages, a customer's mail shared as a card in the chat, voice messages, video calls and screen sharing. All on your server, end-to-end encrypted if you want.
Documents
Word, Excel and PDF – right next to it¶
Edit quotes, spreadsheets and presentations in the browser, together and at the same time. File an attachment with one click, attach a file from your documents. With Schreibzeug.
Send confidentially
Payslips don't belong on the open internet¶
One click on the lock and the mail goes out encrypted – to any recipient, even one who has never heard of encryption: they open it through a link with a code on your server.
Company admin
A job for the boss, done in two minutes¶
Add employees, reset passwords, hand out shared mailboxes and rights – no IT skills needed. Whoever leaves is locked out, not deleted: their mail stays with the company.
On the phone
Like an app on your phone. No app store.¶
Every view is built for the phone, with a tab bar and notifications – installed with one tap on the iPhone, on Android and on the PC.
And why all of it is better off with you¶
🇪🇺 Your data stays with you
On your server, in Europe or in your own office. No US company reading along. GDPR without the headache.
💶 No cost per head
Ten people cost as much as one. You pay for the server, not for every user.
🧩 One app instead of five
Mail, calendar, tasks, chat, phone and documents with one sign-in.
📦 Moving in included
Mail, contacts and appointments come along from Microsoft 365, Gmail, GMX or Outlook.
🔌 Outlook and iPhone keep working
Whoever prefers Outlook, Thunderbird or the iPhone's Mail app can keep using it.
🤖 AI, if you want it
Claude and other assistants look up customers, mails and appointments and write drafts. They never send or delete.
🔐 Secure out of the box
Sign-in with a second factor, encrypted mail and encrypted backups.
🔓 Open source, no lock-in
Open source code and open standards. You can take everything with you at any time.
Made for businesses that work instead of counting licences¶
Trades · law firms and practices · freelancers · small and mid-sized businesses. Made in Europe.