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Vendor comparison

Exclaimer vs. WiseStamp — the honest side-by-side.

Both are real, mature signature products used by thousands of companies. They also target completely different buyers, and picking wrong wastes either a lot of money (over-buying Exclaimer for a 20-person team) or a lot of IT time (trying to server-side-inject signatures your team is already installing locally). Here's the honest breakdown, and a note on when neither is the right answer.

Pricing reflects published tiers as of early 2026. Both vendors change tiers regularly — confirm on their sites.

Exclaimer
WiseStamp
Architecture
Server-side injection via Microsoft 365 / Google Workspace mail-flow connector.
Client-installed: per-user install link, pasted into the mail client once.
Mobile-sent mail
Covered automatically (server-side).
Requires separate install on the mobile app.
Pricing model
Per-mailbox annual subscription; ~$1.50–$3.30/mailbox/mo depending on tier.
Per-seat monthly or annual; ~$2–$6/user/mo depending on tier.
Free tier
14-day trial; no permanent free plan.
Permanent free plan for individuals (with a small WiseStamp promo line).
Setup time
3–5 days including DNS + pilot ring.
Under an hour for a whole small team.
Central enforcement
Guaranteed — user can't override.
Owner-tracked adoption; user can edit local copy.
Design surface
Central template designer with directory attribute mapping (Entra ID, Google Workspace groups).
Central design + per-user personalisation; large template library.
Marketing banners
Full campaign module — scheduling, targeting, A/B on higher tiers.
Campaign banners with scheduling on Pro tiers.
Best for
500+ mailboxes with compliance requirements; enterprises on Microsoft 365.
Individuals through mid-market that want a broad template library and per-seat SaaS billing.
Choose Exclaimer if
  • • You have 500+ Microsoft 365 mailboxes and dedicated IT.
  • • Compliance requires guaranteed signatures on every send, including mobile.
  • • Per-department signature rules keyed to your directory matter.
  • • The IT team is used to running mail-flow connectors.
Choose WiseStamp if
  • • You're an individual or a team of 5–200 that doesn't want to route mail through a vendor.
  • • You want a big template catalogue tuned by industry.
  • • Per-seat SaaS billing lines up with how your org buys.
  • • The permanent free plan is genuinely useful for solo trials.
When neither is quite right

If you're a 5–100 person company that wants central design and a swappable banner but doesn't want per-seat billing or a mail-flow connector — Wren was built for that gap. Flat $99/mo up to 50 people, client-installed like WiseStamp, centrally controlled like Exclaimer's banner module. Free forever for solo. Design one in the free builder — no signup required.

Related: Exclaimer vs CodeTwo · CodeTwo vs WiseStamp · Wren vs Exclaimer · Wren vs WiseStamp