Automatic insertion in Outlook
A single deployment for the whole organization. The signature is inserted when the message is composed, with nothing for the employee to do.
- Windows
- Mac
- Web
- iOS
- Android
Centralized Outlook signatures for Microsoft 365
Manage every signature in your organization in one place. They insert automatically in Outlook for Windows, Mac, web, iOS and Android, with nothing for employees to install.
No card required for the 14-day trial. Cancel at any time.
- $1 per user per month
- Hosted in Quebec
- Microsoft Partner
- signatures inserted since Sept. 25, 2026
- 46,000+
- human clicks on signature links
- 5,200+
- employees active the week of Nov. 9, 2026
- 350+
Production figures as of November 9, 2026
Trusted by
- Hosted in Quebec
- Law 25 compliant
From the console to Outlook
Create a signature, target a group, watch it appear.
Demo: in the ATOM console, an admin creates a signature, inserts the {Full name} and {Title} tokens into the signature card, targets it to the Microsoft 365 group “Sales”, then opens Outlook where the signature is inserted automatically into a new message.
Today, everyone improvises their own signature.
Before
- Each employee copies, pastes and edits their own.
- The old logo is still in circulation.
- On mobile, some messages go out unsigned.
With ATOM Signatures
- One source, applied to every message.
- One logo, details pulled from Microsoft 365.
- Outlook for Windows, Mac, web, iOS and Android: the same signature.
One platform for all your signatures
One deployment, then everything is managed from the console: targeting, campaigns, surveys.
Targeting by group, person or shared mailbox
Each department gets its own signature. When rules overlap, the most specific target wins.
Internal or external, based on the recipient
One version for your colleagues, another for outside contacts, in Outlook for Windows, web and Mac. Also by language and by date.
Banner campaigns
A banner under the signature, targeted, with A/B variants. Aggregated click rate, without identifying who clicked.
Satisfaction surveys
Three faces, a 0 to 10 score or five stars, answered in one click from the email. Results in the console.
vCard and QR code
Recipients save your details in one click or one scan. Booking links and Google reviews are possible.
Why this signature?
Enter an address: the console shows the chosen signature, the other candidates and the reason each one was ruled out.
Visual editor and Microsoft 365 data
Logos, columns, colors. Name, title and phone fill in from Microsoft Graph, with up to 15 extension attributes.
Four steps, then it runs itself.
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Connect Microsoft 365
An admin grants read-only access through Microsoft Entra.
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Build your signature
In the visual editor: name, title and phone come from Microsoft 365.
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Deploy the add-in
From the Microsoft 365 admin center, once for the whole organization.
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It's signed, everywhere
It is inserted when the message is created, in Outlook for Windows, Mac, web, iOS and Android.
Start 14-day free trial
No card required for the 14-day trial. Cancel at any time.
One price. Everything included.
A single plan, with no tiers or add-ons to unlock.
$1
per user
per month
per month
Or $12 per user per year
Taxes extra.
Nonprofits and public sector, on request $0.75 per user per month, taxes extra
Request this rate
No card required for the 14-day trial. Cancel at any time.
Requires a Microsoft 365 administrator account. Gmail and Google Workspace are not supported.
Everything's included
- Centralized deployment
- Unlimited signatures
- Group targeting
- Real-time data
- Visual editor
- Signatures on mobile
- Law 25 compliance
- Audit logs
- Satisfaction surveys
- vCard and QR code
- Support included
Estimate your cost
Per month
Per year
Taxes extra.
More than 300 users: pricing on quote.
Request a quoteEnter a whole number, 1 or more.
A high volume of users? Write to us at info@atomsolutions.ca.
Your data is hosted in Quebec.
Law 25 compliant
Processing records, tracked consent and the right to erasure.
Hosted in Quebec
Database and files hosted in Quebec.
Isolation per organization
Strict isolation, enforced by the database itself.
- Read-only Microsoft 365 access
- No email content read
- Append-only audit logs
A local team is here to help.
Technical, billing or privacy question: our Quebec-based team replies.
Contact support- Languages
- French and English
- Hours
- Mon–Fri, 9 AM to 5 PM (ET)
- Reply
- Within 1 business day
Apple Wallet and Google Wallet
Your business card, on every phone.
Each employee adds their business card, in your company's colors, to Apple Wallet or Google Wallet.
- Added in one tap from the “My signature” pane in Outlook
- Title and phone number updated from Microsoft 365
- QR code to share contact details, no app needed
- Turned on by the administrator, off by default
Resell ATOM Signatures to your clients.
Manage your entire client portfolio from a single console, at a price you set — and your own signature stays free.
Compare, choose, deploy.
Comparisons
ATOM compared with Exclaimer, CodeTwo, Letsignit, Signitic and Microsoft 365's built-in signature.
Industries
Law and notary firms, municipalities, manufacturers: what changes in your industry.
MSPs and resellers
Manage every client's signatures from a single console.
Glossary
Law 25, Microsoft Graph, event-based Outlook add-in: the key terms, explained simply.
Before you write to us.
$1 per user per month, or $12 per user per year, taxes extra. Everything is included. Nonprofits, municipalities, hospitals and the public sector: $0.75 per user per month, on request.
No. No card is requested for the 14-day trial. If no payment method is added by the end of the trial, signatures are suspended. You can cancel at any time.
Anytime. On cancellation, your data is deleted according to our retention policy.
On a host in Quebec, in line with Law 25. You keep control and the right to erase your data.
Read-only access to the directory (profiles and groups) via Microsoft Graph, in application mode. We never read any email content.
No. The admin deploys the add-in once for the whole organization. Nothing for employees to do.
Outlook on Windows, on the web, on Mac, the new Outlook and Outlook mobile (iPhone and Android), through the add-in deployed for the whole organization. The signature is applied while composing the message.
Yes. In Outlook on Windows, on the web and on Mac, the signature switches based on the recipients: one version for your colleagues, another for outside contacts. You can also pick a signature by the employee's language and schedule a start and end date.
Yes. The editor's Survey block adds three faces, a 0 to 10 score (NPS) or five stars to the signature. Recipients answer in one click from the email they received, results and comments land in the console, and a widget can show your average rating on your website. Included at no extra charge.
Yes. A vCard link and a QR code let recipients save your contact details in one click or one scan. The signature can also include a booking button (Bookings, Calendly…) and a link to your Google reviews page.
Our team replies in French and English, Monday to Friday, 9 a.m. to 5 p.m. (ET), within 1 business day. Support is included in the price.
Ready to standardize your signatures?
Consistent signatures for your entire organization, deployed from a single console.
No card required for the 14-day trial. Cancel at any time.