Three decisions behind Sealed.
Zero friction in the room
QR code on the wall, #code as fallback. Nobody creates an account, nobody installs anything — the room is writing within 60 seconds.
Your brand
Your event’s logo and colors — on the page, the letter page and in every email. White-label on request.
Sealed by design
Letters are stored encrypted, deleted after delivery, and unreadable even to you as the organizer. EU servers, GDPR.
Three steps, one ritual.
Create the event
Title, fill-in text, logo, colors — done in two minutes. Fix the delivery day or leave it to participants.
QR on the wall
Participants scan, write, seal. With flipchart photos and a calendar entry if they like.
Letters travel
Once or as a series — daily, weekly, monthly, up to a year. Arriving exactly when it counts.
One tool, many stages.
Built by two people who run these rooms themselves.
Sealed didn’t start on a drawing board — it started at a flipchart: for years we have closed our leadership and negotiation workshops with this letter ritual — and eventually wanted a tool worthy of the moment.
Prof. Dr. Niels Van Quaquebeke
Psychologist; researches and teaches leadership, communication and AI. Gives keynotes and executive trainings — and loves to close them with a letter.
“The strongest moment of a workshop is often the quietest: when everyone writes.”
Prof. Brooke Gazdag, PhD
Organizational psychologist; researches and teaches negotiation, leadership and inclusion. Trains teams and executives — from negotiation bootcamps to conference stages.
“Transfer doesn’t happen in the room — it happens the day the letter arrives.”
Sealed means sealed.
- Letter texts are stored encrypted — the key lives only on the server.
- After delivery the text is deleted. Attachments follow after 30 days.
- Organizers see numbers, never content — made technically impossible, not merely promised.
- No account, no ads, no data selling — the email address is used for delivery only.
- Hosted in the EU, GDPR-compliant, data processing agreement on request.
Fair for a ritual that lingers.
The logic is simple: every tier can do everything — they differ in size. The Workshop plan carries ongoing workshops up to 60 people, the Event Pass one large one-off format up to 1,000, the Events plan continuous operation up to 3,000. In the beta phase everything is free — prices apply from launch.
- Single and series letters to your own address
- Daily to monthly — up to a year
- 1 attachment · 5 MB · double opt-in
- Up to 60 participants per event
- Series letters, branding & white-label, QR & #code
- Stats
- DPA — filled in digitally, sent to you ready
- Everything in the Workshop plan — for one event
- Up to 1,000 participants · 9-day collection window
- Everything in the Event Pass — ongoing, unlimited events
- Up to 3,000 participants · 9-day collection window per event
A “collection window” is how long an event accepts new letters. Sealed letters travel up to one year into the future — regardless of the collection window. Prices incl. VAT; EU businesses outside Germany with a valid VAT ID pay net (reverse charge). Purchase by invoice with a PO number — DPA (fill in digitally) and price sheet as PDFs.
What organizers ask.
Can organizers read the letters?
No — technically impossible. Letters are stored encrypted, and the text is deleted from the server upon delivery. Organizers only ever see numbers: how many letters are scheduled, delivered, failed. Attachments are deleted 30 days after delivery.
Subscription or pass — which one fits?
Rule of thumb: ongoing workshops up to 60 people → Workshop plan. A single large format up to 1,000 → Event Pass. Many events a year, or up to 3,000 participants → Events plan. Pass and Events plan run by invoice — ideal when an organization pays.
Do participants need an account or an app?
No. Scan the QR code or type the #code, write, done. The email address is used for delivery only.
Will the letters arrive safely — even a year from now?
Delivery runs over an authenticated sending domain (SPF, DMARC). Series letters carry an unsubscribe link; every delivery is monitored.
What happens to photos and files?
Attachments reach the letter via a secure link and are deleted from the server automatically 30 days after delivery.
What does it cost participants?
Nothing — ever. Organizers pay per event or by subscription.
What about after the event?
You set a closing date; after that the event stops accepting letters automatically. Letters already sealed keep travelling, of course.
GDPR, DPA, EU hosting?
Servers in Germany, GDPR-compliant. The data processing agreement (DPA) can be filled in digitally and arrives ready by email (German) — on all paid tiers.
Can participants send themselves the letter repeatedly?
Yes — daily, weekly or monthly, for up to a year, with its own end date and calendar entry. Unsubscribe any time via the link in the letter.