Deploy Email Signatures via API and HTML files

Deploy signatures everywhere.

Push email signatures to Gmail, New & Classic Outlook, Apple Mail. End Users use API keys for automatic deployment in Browser Extensions, Windows App, MacOS App or Outlook Add-in, or guided manual installs for other apps.

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Installer Apps

Download our apps for automatic install and updating signatures in most major webmail and desktop email clients.

Install SigStudio's desktop apps, browser extensions, or Outlook add-in to give your team the fastest way to apply and update their email signatures.

Browser Extensions

Install signatures in Gmail, New Outlook, and other webmail clients directly from your browser.

Chrome Firefox Safari Brave Opera

New Outlook Add-in

Sideload the SigStudio add-in XML file into your custom New Outlook Add-ins for signature insertion from your compose window.

Download XML file Sideload instructions

macOS App

Install signatures into Apple Mail, Outlook for Mac, and Thunderbird on macOS.

Download for macOS

Windows App

Install signatures directly into Outlook (older versions), Thunderbird, and Mailbird on Windows 10 & 11.

Download for Windows

One-click deployment

Push updates to every webmail and desktop inbox instantly

No more chasing teammates to update their signatures. Deploy once and every email goes out on-brand.

API key installs. Connect Gmail, New Outlook or Apple Mail and signatures update automatically in webmail and desktop versions.
Hosted HTML deployment. Share a hosted link that always serves the latest signature for quick manual installs.
Manual install guides Step-by-step guides for self-install on any email client that supports HTML.
Auto-update signatures Change a template once and every deployed signature and hosted link updates instantly.

Works everywhere

Every email client, app, and CRM that supports HTML covered.

Automatically install and update signatures across supported email clients, apps and CRMs using integrations and APIs, with guided manual setup available for all other email clients and applications.