Ready to go from day one
Sigil ships with a polished, pre-built signature template. Use it as-is, or recreate your current signature exactly with the drag-and-drop designer or HTML editor.
Sigil vs Exclaimer The modern alternative to
The modern alternative to
Exclaimer for Microsoft 365
Sigil is a purpose-built replacement for Exclaimer Cloud, applied client-side in Outlook, personalised from your directory, provable per mailbox, and priced simply. Start with a polished, ready-made signature, or recreate your current one exactly.
14-day free trial · no card required · £0.70 per mailbox / month, ex VAT
Side by side
How Sigil compares
The differences that matter when you’re managing signatures for a whole organisation on Microsoft 365.
SigilExclaimer
How signatures are applied
One way only: an Outlook add-in that applies the signature as you write. Nothing touches your mail flow.
Server-side through Exchange Online mail flow rules, client-side through the Exclaimer Outlook add-in, or both together.Source: Exclaimer: server-side vs client-side signatures
Sender sees the signature while writing
Always. The signature is in the compose window before the message is sent.
Client-side: yes. Server-side: the signature is added after sending, so the sender cannot preview it.Source: Exclaimer: server-side vs client-side signatures
Proof it’s working
Per-mailbox activity and a never-applied list, so you know exactly which mailboxes are covered.
Usage and engagement dashboards and a user activity log on the Pro plan.Source: Exclaimer KB: what is included in your plan
First deployment
Deployed through Microsoft 365 Integrated apps. Microsoft says a new add-in can take up to 24 hours to appear for every user.
Same mechanism for the add-in. Exclaimer says it can take approximately 72 hours to reach all users.Source: Exclaimer KB: Install Exclaimer Outlook Add-in
Directory permissions requested
Three read-only application permissions: User.Read.All, Organization.Read.All and GroupMember.Read.All. No write, no mail.
User.Read, Directory.Read.All and User.Read.All, per Exclaimer’s product page.Source: Exclaimer: signatures for Microsoft 365
Personalisation
Live from Microsoft Graph: 30+ attributes including 15 custom, with conditional sections.
Synced from Entra ID (Azure AD) attributes.Source: Exclaimer: signatures for Microsoft 365
Authoring
Drag-and-drop designer and full HTML control, with drafts, line diffs and versioned rollback. Unlimited templates on the one plan.
Drag-and-drop designer. One template on Starter; unlimited on Standard and Pro.Source: Exclaimer: pricing and plans
Analytics & privacy
Click counts only, on every plan: no IP addresses, no recipient identities, no message content.
Signature analytics on the Pro plan only.Source: Exclaimer KB: what is included in your plan
Pricing
£0.70 per mailbox per month (ex VAT), every feature on one plan, shared and group mailboxes free, no minimum seat count.
Starter, Standard and Pro plans (listed at $0.90, $1.45 and $1.75 per user per month, billed annually), features gated by plan, 10-user minimum.Source: Exclaimer: pricing and plans
Free trial
14 days, all features, no card required.
Free trial available.Source: Exclaimer KB: purchase after trial
Comparison last reviewed: September 2026
Highlights reflect Sigil’s approach. Every Exclaimer statement links to the public page it was read from. Exclaimer’s plans and pricing change, so check their site for current details.
Why teams switch
Everything you’d expect, and the parts you couldn’t get before
You can prove it’s working
Most signature tools can’t tell you who’s actually covered. Sigil shows per-mailbox adoption and a never-applied list, so nothing slips through.
No mail-flow surprises
Signatures are applied in the compose window, so senders see their own signature as they write. Sigil never reroutes or stamps your outbound mail.
Change it in seconds
Rebrand, fix a disclaimer or launch a campaign, then publish. The next message every user composes carries the change, with no redeploy and no waiting.
One simple price
£0.70 per licensed mailbox per month, excluding VAT, with every feature on one plan. No tiers, no feature gates, and shared and group mailboxes are free. The only extra is an optional branded link domain, priced per organisation rather than per mailbox.
Privacy by default
Read-only directory access and click-count-only analytics: no IP addresses, no recipient identities, no message content, ever.
Publish to 10% first, with automatic rollback
A publish can go to 10% of mailboxes, then 25%, 50% and 100%. It steps up only as apply telemetry supports it, and rolls itself back automatically if the new version applies worse than the old one.
A weekly health digest, so you know it’s working
Tenant admins get an email digest, weekly by default, with monthly or off as options. It covers signature coverage as a percentage, mailboxes that have never applied a signature, apply failures and gaps in directory data: the problems you’d otherwise never know about.
Only pay for the mailboxes that need signatures
Admins can exclude individual mailboxes or an Entra group, such as frontline or shift staff, from Sigil. Excluded mailboxes come off the seat count, which lowers the effective cost.
Ready to send
A polished signature, ready to go
Sigil comes with a professionally designed signature template, pre-packaged and ready from the start, so you’re not building from a blank page. Prefer a seamless switch? Recreate your current signature exactly with the drag-and-drop designer or full HTML editor, then modernise it whenever you like.
Readysignature included: use it as-is or tailor
Switching is simple
Move from Exclaimer in three steps
- 01
Start your trial
Grant admin consent and deploy the Sigil add-in through Microsoft 365 Integrated apps. No card required. Microsoft can take up to 24 hours to push the add-in to everyone.
- 02
Set up your signature
Use Sigil’s ready-made template, or recreate your current signature exactly with the drag-and-drop designer or HTML editor, so the switch is seamless.
- 03
Switch it on
Roll out to a pilot group with assignment rules, confirm adoption in the dashboard, then turn off the old tool.
Switching questions
Moving over, answered
Will recipients notice the switch?
Only if you want them to. Sigil ships with a polished ready-made signature, and its designer and HTML editor let you recreate your current signature exactly, so you can make the switch seamless for recipients, or refresh the design at the same time.
Do I have to change my mail flow?
No. Sigil applies signatures client-side, inside Outlook as messages are composed. There are no connectors to configure and nothing rerouting your outbound mail.
Can I run both during migration?
Yes. Because Sigil is client-side and assignment rules let you pilot with a group first, you can trial it alongside your existing tool and cut over when you’re ready.
Get consistent signatures on every mailbox.
Centralise. Standardise. Simplify.
On-brand signatures on every Microsoft 365 mailbox. Set up in minutes, pushed out to everyone by Microsoft within a day, and updated in seconds after that. Start free and see it working across your tenant.
No credit card required · Set up in minutes · £0.70 per mailbox / month, ex VAT after
Exclaimer is a trademark of its respective owner and is not affiliated with, or an endorser of, Sigil or Tophhie Cloud. This comparison describes Sigil’s approach and publicly available information; competitor features, plans and pricing change, so please check Exclaimer’s website for their current details.