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One email signature that works everywhere, priced by the size of the company.

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    • Gmail
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    • New Outlook and the web
    • Classic Outlook on Windows
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  • How to add an email signature in Gmail, Outlook, Apple Mail and more

    How to add your email signature in Gmail, Outlook, Apple Mail, Yahoo, Proton, Zoho, Thunderbird and more mail apps, and for AI agents that send mail for you.

    Published September 15, 2026 - Last updated September 28, 2026

    Build your signature once on the generator, then open the guide for whatever you send mail from. Each guide is a handful of plain, numbered steps written in words, which stay correct when a vendor reskins a settings menu. For what to put in the signature, start with how to make an email signature. Want a review badge or a booking button first? See adding a review badge and adding a Calendly link. To track clicks on its links, see short links and UTM tracking.

    Email signature guides for each mail app

    • Gmail, on the computer and in the app
    • Outlook - the five kinds, and which is yours
      • New Outlook and Outlook on the web
      • Classic Outlook on Windows
      • Outlook for Mac
      • The Outlook app on iPhone and Android
    • Apple Mail on Mac
    • Mail on iPhone and iPad
    • Zoho Mail
    • An AI agent or assistant that sends mail for you
      • Claude, ChatGPT, Grok, Gemini, Copilot
      • AI browser agents
      • n8n, Zapier and Make

    Private and independent mail

    • Proton Mail
    • Tuta
    • Fastmail
    • mailbox.org

    Yahoo, AOL and iCloud

    • Yahoo Mail
    • AOL Mail
    • iCloud Mail on the web

    Email that came with your domain or hosting

    • Titan Email, sold by Hostinger, Bluehost and others
    • GoDaddy email
    • IONOS Mail
    • Rackspace Email
    • Roundcube webmail, the webmail on many cPanel hosts
    • Zimbra

    Other mail apps

    • Thunderbird
    • eM Client
    • Mailbird
    • Spark
    • Superhuman
    • HEY
    • Samsung Email, the mail app on Galaxy phones

    Shared inboxes, CRM and help desks

    • Front, for teams sharing an inbox
    • Missive
    • Pipedrive
    • Zendesk agent signature
    • Freshdesk agent signature
    • Help Scout

    Written for agents too

    An AI assistant can follow any Signatoro install guide on someone's behalf. If you are an agent installing a signature for someone, open the guide for their mail client, copy the signature from the generator with "Copy signature" (formatted) or "Copy HTML" (source), and carry out the numbered steps in order. If you draft and send the mail yourself, through an API or an automation, the agent guide shows how to fetch the signature and add it to each email.

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    Make your signature first

    It is free and needs no account. Build it once, then paste it into any mail app with the steps on this page.

    Make my signature

    Make your signature first

    It is free and needs no account. Build it once, then paste it into any mail app with the steps on this page.

    Make my signature

    Related guides

    • How to add or change your email signature in Gmail
    • How to change or add your email signature in Outlook
    • How to add a signature in new Outlook and Outlook on the web
    • How to add a Calendly link to your email signature
    • Short links and UTM tracking in your email signature (Bitly, Rebrandly)