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Ready to plan a rollout? Use the Microsoft 365 email-signature rollout checklist →
Microsoft 365 teams usually need an email-signature platform for one of three reasons: keeping contact details accurate, giving marketing a consistent campaign area, or applying compliance rules without asking each employee to update Outlook manually. Scribe, CodeTwo and Exclaimer can all help, but they take different approaches.
Our short answer
Choose Scribe for a simple, centrally deployed client-side experience across Outlook on the web, desktop, iOS and Android.
Choose CodeTwo when you want a Microsoft 365-focused platform with cloud, Outlook-side or combined signature modes.
Choose Exclaimer when enterprise governance, complex rules, directory synchronization and server-side signature application are the priority.
At a glance
| Platform | Best fit | Signature model |
|---|---|---|
| Scribe | Teams that want a fast, visible compose-time signature experience | Client-side Microsoft 365 add-in |
| CodeTwo | Microsoft 365 teams that need flexibility in signature modes | Cloud, Outlook-side or combined |
| Exclaimer | Larger organizations with complex governance needs | Server-side with client-side options |
Choose Scribe for simple rollout and visible signatures
Scribe is designed around centrally installing a Microsoft 365 add-in. A Microsoft 365 super admin deploys it once; employees receive their signature without having to install anything. Its client-side experience covers Outlook on the web, desktop, iOS and Android, which makes it useful when people should see the signature before they send.
Scribe has a free tier for up to two users, Business for 3–99 users and Enterprise from 100 users. It charges for primary addresses with an assigned signature.
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Choose CodeTwo for Microsoft 365 signature-mode flexibility
CodeTwo Email Signatures 365 is built around Microsoft 365. It supports cloud-side, Outlook-side and combined modes, so a team can choose whether a signature should be applied after email leaves Microsoft 365, appear while someone composes, or use both approaches.
Its pricing uses a minimum of ten licences and includes all features. That can suit established Microsoft 365 teams, but compare the licensing model against your actual number of users.
Read the Scribe vs CodeTwo comparison →
Choose Exclaimer for enterprise control
Exclaimer emphasizes directory-based rules, Entra ID synchronization, role and department targeting, legal disclaimers and server-side Microsoft 365 delivery through Exchange Online mail-flow connectors. Its client-side capability can also support teams that need signature visibility while composing.
It is usually the stronger fit where several stakeholders manage messaging or where policy consistency matters more than keeping the setup minimal.
Read the Scribe vs Exclaimer comparison →
How to make the final choice
Start by choosing the delivery model you need: visible signatures while composing, server-side consistency after send, or a combined approach. Then test real scenarios: new messages, replies, shared mailboxes, messages sent from mobile and the data fields marketing needs to control.
Run a short pilot with representative users before committing. The best platform is the one that keeps signatures accurate without creating a new support burden.
Last reviewed: September 2026. Features, deployment requirements and pricing can change; confirm current details on each provider’s official documentation before purchase.
Save 30% with Scribe
If Scribe is the right fit for your Microsoft 365 team, use the Libebox partner link and enter code LIBEBOX at checkout for 30% off your first payment.
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Libebox may earn a commission if you purchase through this link. The recommendation is based on the fit described above.