Deploy thousands of email signatures in 3 clicks with the Letsignit Add-in for Outlook!

The Letsignit Add-in: the 1st email signature add-in for Outlook co-developed directly with Microsoft R&D teams!

With our new Add-in, deploying your email signatures to all your employees is even easier. Directly integrated into the Microsoft 365 (Office 365) admin console, you can rely on a solution that will satisfy both your IT teams and your end-users.

Microsoft Gold Partner,
Microsoft (Office) 365 seamless integration,
and Azure cloud-based architecture

Deploy email signatures
in only 4 steps


Design on-brand email signatures for all your teams

Use HTML import to instantly generate professional, on-brand email signatures. Or choose a template and use the Drag & Drop Designer to create email signature templates based on your brand colors. No technical skills are required!
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Synchronise & deploy

Deploy the email signatures to all your teams with the Outlook Add-in

Thanks to the synchronization with your directory (Azure AD, or Azure local), all your users' information is automatically and securely pre-filled.

Publish the Letsignit Outlook Add-in to the users of your choice, directly from the Microsoft 365 (Office 365) administration center, without the need to install an application on all workstations.
See in video how the Add-in works

A seamless experience for your employees

The Add-in is then directly installed on users’ Microsoft accounts (Outlook Desktop and OWA), who can now effortlessly benefit from Letsignit across all workstations.

Bid farewell to manual email signature management as our cutting-edge solution seamlessly incorporates and updates signatures for each email your employees create.
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Communicate & measure

Add banners to your signatures for internal and external communication

Spread your communication campaigns in a targeted, non-intrusive, and cost-effective way in all the emails your employees send. Promotions, eBooks, news, recruitment, events, surveys... your colleagues can choose the most appropriate campaign according to their recipients, ensuring a personalized & targeted touch.

Then, track the performance of your campaigns to improve your actions!
Learn more about Campaigns

Email is personal.
That’s why security is our top priority.

& secure
Highly scalable 100% cloud platform hosted on Microsoft Azure
Certified with ISO 27018 and ISO 27001,
the highest global standards for information and data security
& tests
Regular security audit & penetration tests
Learn more on security

Don’t take our word for it.
More than 1 million people trust Letsignit with every email they send.

Letsignit has been an amazing partner for the Office Extensibility team. They not only helped design, but also were pioneers in building and testing solutions using our new Signature APIs and event-activated Outlook Add-ins.
Juan Balmori
Principal Product Manager
Perfectly integrated with the Microsoft 365 & Outlook platform, Letsignit perfectly meets the needs of large accounts with disconcerting simplicity!
Olivier Lanilis
ISV Lead
The effortless integration of Letsignit with Office 365 has resulted in a high adoption rate of the solution by our employees. The signatures are contextualized according to our campaigns, and their profiles have become a standard service of their Office account.
Guillaume Mikowski
145 equipped employees
Letsignit is: easy to integrate, easy to manage, easy for users, and easy to use.
Alaa Eddine Elhimer
Tech Administrator
5,750 equipped employees
Deploying Letsignit to users and integrating it with Office 365 was very easy. The ability to sync specific groups from Office 365 is a nice feature.
Brian Menzel
Read the success story
When a new employee joins the company, I no longer have to worry about installing their email signature. I save a lot of time!
Cyril Darmouni
Associate Director
Read the success story
Letsignit makes it easy to create campaigns and manage contact groups. Its link with Office 365 simplifies internal implementation and allows for tracking of user usage. The separation of signature and campaign creation enables fast updates, even with multiple entities.
Rachel Pallamidessi
Digital Communication Manager

More visibility.
More consistency.
More opportunities.
Less effort.

Turn your email signatures into a powerful 1-1 engagement channel for your brands & campaigns.

Select a time that’s convenient for you.
See Letsignit in action during a personalized demo.
Ask questions, tell us your goals, and see how Letsignit can fit for your company.

Request your free trial