Internal communications

Internal email that goes out
from your mailbox, not ours.

A real drag-and-drop editor for people who send the all-staff email — wired directly into your own Gmail or Microsoft 365 account. Your address, your domain, your reputation. We never become the sender.

Open the app See why it's different
No passwords to manage EU or US data residency Not priced per contact

The difference

Most platforms send for you.
This one sends as you.

Mass-mail platforms relay your message through their own infrastructure. That is why internal announcements land in Promotions, show "via" beside your name, and get more expensive every time you hire.

Traditional email platforms

  • Sent from their servers, on shared IPs you don't control
  • Recipients see a relay address, or "via" beside your name
  • Replies go somewhere other than your inbox
  • Billed per contact, so internal comms get more expensive as you hire
  • Your employee directory has to be uploaded to a third party

SlipperySign Mail

  • Sent by your own Gmail or Microsoft 365 account, natively
  • It is simply an email from you — because it is
  • Replies arrive in your inbox, in the same thread
  • Send to the distribution lists you already have
  • No contact list to export, upload or keep in sync

Your all-staff email should look like it came from a person — because it did.

Everything else follows from that one decision: the deliverability, the pricing, the privacy posture, and what your works council has to say about it.

0Recipients we can identify. Opens and clicks are counted in aggregate only — there is no per-person tracking to switch off, because it was never built.
0Contacts to upload. You send to the distribution lists your directory already maintains.
0Passwords held. Sign-in is federated through the Google or Microsoft account you already have.
EU/USStorage chosen per customer, not per deployment. Set it once, in an admin screen.

The editor

Everything on the page is a block you can drag.

Three panes: components on the left, your email in the middle, properties on the right. It behaves the way you expect a design tool to behave — which is the whole point, because the person writing the all-staff email is not a designer.

Sections that build their own contents list

Mark a section, and the table of contents at the top writes and re-orders itself. Long internal updates stop being a scroll.

Locked regions survive fifty authors

Freeze the parts of a theme that must not move. Everyone else edits around them and the template still looks like your company.

One-question polls, read on the same screen

Drop a two-option poll into the mail. Results appear in the campaign's analytics — as counts, never as names.

Built on MJML

So it renders correctly in Outlook, which is still where most of your colleagues will open it.

What you get

Governance the compliance team will actually accept.

Internal communications is not marketing. The controls are different, the audit expectations are different, and the privacy bar is higher.

Brand governance that holds

Define brands centrally — colours, fonts, heading styles. Lock the regions of a theme that must not change, so a template survives contact with fifty different authors.

Nothing ships unreviewed

Nominate a reviewer and the send button stays locked until they sign off. Edit the content afterwards and the approval is automatically voided — nobody ships something a reviewer never saw.

Safe for a whole team

Share a campaign as viewer or editor, publish themes across the company, and let edit locking stop two people overwriting each other mid-sentence.

Analytics your works council can live with

Opens and clicks are aggregate counts. There is no per-recipient identity to disable, because the product was never built to collect one — which is a much easier conversation than a setting you promise to leave off.

Residency you set yourself

Choose EU or US storage per customer. Set your own retention policy and old campaigns and tracking data delete themselves on schedule.

The details

Answers to the questions IT will ask.

Identity
Google Workspace & Microsoft 365Federated sign-in. We never see or store a password.
Sending
Gmail API & Microsoft GraphFrom the user's own mailbox, with their consent.
Recipients
Your existing groupsDistribution lists and aliases you already maintain.
Data residency
EU or USSet per customer, not per deployment.
Retention
Policy-drivenAutomatic deletion of campaigns and tracking data.
Audit
Sent mail is immutableA sent campaign can never be edited, only duplicated.
Tracking
Aggregate onlyNo per-recipient identification, ever.
Infrastructure
Runs at the edgeNo cold starts, no per-contact billing.

Send your next all-staff email from your own address.

Sign in with the Google or Microsoft account you already use. There is nothing to install, and no contact list to upload.

Open the app

SlipperySign Mail is the first of a family. Tools for building learning experiences are on the way, on the same foundations.