Email signature software for small business: options

For a team under about 50 people, you have three realistic choices: the free footer built into Google Workspace or Microsoft 365, a script you maintain yourself, or a signature management tool. The built-in footer is fine if one block of identical text is enough. As soon as you want each person's name, title, phone and photo in a designed layout, a tool saves time, and the right one depends mostly on whether you run Google Workspace or Microsoft 365.

This question comes up in sysadmin, helpdesk and small business forums every few weeks, usually phrased as "what are people actually using?". Here is the honest map.

Option 1: the built-in footer (free)

• Google Workspace: the Admin console has an Append footer setting under Gmail compliance. It adds the same text or HTML to every outgoing message from the users you choose.
• Microsoft 365: Exchange mail flow rules can append a disclaimer, and they support a few user attributes such as display name and title.

Limits: Google's footer is identical for everyone, so it cannot show each person's name. Both footers are added on the server, so the sender never sees them while writing, and they stack at the bottom of long reply threads. They work well for a legal notice, less well for a personal signature. We compare them in detail in Google Workspace footer vs signature.

Option 2: scripts (free, but someone owns them)

On Google Workspace, the Gmail API lets an admin write each user's signature. Tools such as GAM do this from the command line. On Microsoft 365, PowerShell can set signatures for Outlook on the web.

Scripts work. The cost is upkeep: someone has to edit HTML by hand, rerun the script when titles change and debug why a logo breaks in classic Outlook. That is fine for an IT person who enjoys it and fragile if that person leaves.

Option 3: a signature management tool

Every tool in this category does roughly the same core job: one template, fields filled in from a directory or by each person, and a way to push the result into mail clients. The differences that matter for a small team:

• Platform. Exclaimer and CodeTwo are built around Microsoft 365 and can add signatures on the server. Several lighter tools focus on Gmail and Google Workspace.
• Minimum spend. Some enterprise tools have a minimum user count or an annual contract. Check the price for your actual headcount.
• Who edits. Can a marketing person change the banner without IT? Can staff fix their own phone number without breaking the design?
• Mobile. Server-side tools can sign mail sent from phones. Client-side tools usually cannot add a signature to mail sent from the Gmail or Outlook mobile apps.

We keep side-by-side notes on Exclaimer, CodeTwo, WiseStamp and others on the alternatives page.

Questions to ask before you pick

1. Are you on Google Workspace, Microsoft 365 or a mix?
2. Do people send a lot from phones? If so, find out how each tool handles mobile.
3. Does the price work at your headcount, including the next hire?
4. Can you try it with your real logo and your real Outlook before paying?

Where Sendoff fits

Sendoff is signature management software for small and mid-sized teams. On the Team plan you build one template, lock the parts people should not change, group people into departments and let everyone fill in their own details. On Google Workspace, Sendoff writes each person's Gmail signature, aliases included, through the Gmail API. Microsoft 365 sync is listed as coming soon in the app, so today Outlook users install their signature by copy and paste with the Outlook install guide.

Sendoff does not add signatures on the mail server, so mail sent from phone apps does not get the signature automatically. If that is a hard requirement, a server-side tool is the better fit. Team pricing is on the pricing page, with a 7-day trial and no card.

FAQ

Is there a completely free way to manage signatures for a team? Yes, if identical footer text is enough, or if someone is comfortable maintaining a Gmail API or PowerShell script.

Do I need server-side signatures? Only if you need every message signed regardless of device, or you need signatures added to mail sent by apps and scanners. Most small teams are fine with client-side signatures.

Sources

• Google Workspace Admin Help, "Add a standard footer to outgoing emails": https://knowledge.workspace.google.com/admin/gmail/advanced/add-a-standard-footer-to-outgoing-emails
• Google for Developers, "Manage aliases and signatures with the Gmail API": https://developers.google.com/workspace/gmail/api/guides/alias_and_signature_settings