Every email,
perfectly branded.
Instant Signer centrally manages email signatures for your entire organization. Design once, deploy everywhere, and turn every send across Microsoft 365, Google Workspace, and Exchange into an on-brand, compliant channel.
Loved by IT & marketing teams
- No-code builder
- Deploys in minutes
- Enterprise-grade security
Brand kit
Full name
Job title
Phone
Live preview
Ava Mitchell
Head of Marketing
Northwind
+1 (415) 555-0188
ava.mitchell@northwind.com
+38%
signature CTR
Inconsistent signatures quietly damage your brand
Your team sends thousands of emails a day. Without central control, every one is a different version of your brand — or a compliance risk.
Without Instant Signer
Signature chaos, on autopilot
- Outdated titles & dead phone numbers
- 10 different fonts, colors, and logos
- Broken signatures on mobile & replies
- Campaign banners nobody can update
- Missing legal disclaimers
With Instant Signer
One source of truth for every send
- Always-current details from your directory
- One brand kit, enforced everywhere
- Pixel-perfect across Outlook, Gmail & mobile
- Banners you schedule and swap in seconds
- Disclaimers applied automatically
Everything you need to own the inbox
From the first pixel of design to server-side enforcement, Instant Signer covers the entire signature lifecycle — included on every plan.
Email-safe signature builder
Drag-and-drop builder with brand kits, photos, QR codes, vCards, and reply/forward variants — rendered as bulletproof email HTML.
Directory sync for users & groups
Pull names, titles, and phone numbers from Microsoft Entra ID, Google Directory, Okta, and HRIS — synced automatically.
Signature rules & testing
Target by department, group, region, recipient, or date. Deterministic, auditable, and testable before you ship.
Campaign banners & disclaimers
Schedule rotating banners and headline content, and apply legal disclaimers automatically across every send.
Usage & engagement analytics
Track sends, clicks, CTR, and element performance with click-tracking and CSV exports.
Team & role management
Role-based access, asset storage for logos and banners, and secure billing — all in one place.
Live in three steps, not three months
No agents to install on every machine. Connect once and Instant Signer handles the rest.
Connect your workspace
Grant read-only directory access and add a single mail-flow connector for Microsoft 365, Google Workspace, Exchange SMTP, or custom SMTP. Done in minutes.
Design & set rules
Build signatures in the no-code editor, drop in your brand kit, then target them by team, region, or campaign with the rules engine.
Deploy everywhere
Signatures are stamped server-side and previewed client-side, so every email is consistent across every device — automatically.
Native mail-flow for every major platform
Route mail through Instant Signer's region-aware gateway. We stamp signatures, disclaimers, and campaigns reliably — without ever storing your email content.
Microsoft 365
Exchange Online connectors and transport rules with server-side stamping.
Google Workspace
Compliance routing and gateway delivery with full directory sync.
Exchange SMTP
On-prem and hybrid support, plus a client-side Outlook add-in.
Custom SMTP
Connect any SMTP provider and route mail through our secure gateway.
Deployment modes
- Server-side stamping for compliance
- Client-side preview in Outlook & Gmail
- Hybrid deployment for full coverage
Plus 40+ integrations
Full visibility into every signature
Measure reach and engagement across the whole company, then double down on what converts.
Emails branded
Signature clicks
Engagement rate
Active templates
Signature engagement
Top performing
Professionally designed, infinitely yours
Start from a polished template or build your own. Every signature renders as bulletproof, table-based HTML that looks perfect across clients and devices.
Ava Mitchell
Head of Marketing
Northwind
+1 (415) 555-0188
ava.mitchell@northwind.com
Daniel Cho
Account Executive
Lumen
+1 (212) 555-0140
daniel.cho@lumen.com
Sofia Reyes
Customer Success
Vertex
+44 20 7946 0321
sofia.reyes@vertex.com
Enterprise-grade by default
Built for IT and security teams from day one. Instant Signer is designed around tenant isolation, least-privilege access, and auditable mail-flow you can trust with your most sensitive communications.
- Role-based access control & granular permissions
- SSO & MFA via Microsoft and Google
- TLS in transit, encryption at rest, no email storage
- Immutable audit logs and emergency mail-flow bypass
- Regional data residency and routing
Trust Center
Audited & certified
2,500+
Companies onboarded
12M+
Signatures deployed monthly
+38%
Avg. signature CTR uplift
99.99%
Gateway uptime
Loved by IT, marketing, and security teams
“We rolled Instant Signer out to 1,400 mailboxes in an afternoon. Every signature is finally on-brand, and our marketing banners actually drive clicks now.”
Ava Mitchell
Head of Marketing · Northwind
“The directory sync and rules engine saved my team countless hours. Server-side stamping means compliance is no longer something I have to think about.”
Marcus Feld
IT Director · Vertex
“Audit logs, SSO, regional routing — it ticked every box our security review threw at it. Onboarding was genuinely the smoothest we've had.”
Priya Nair
Head of Security · Helios
“Engagement analytics turned our signatures into a real channel. We can see exactly which campaigns convert and double down in minutes.”
Daniel Cho
Growth Lead · Lumen
Simple pricing that scales with you
Pay per managed email account — every feature included on every plan. No tiers, no feature gating. Start with a free trial.
1–50 email accounts
billed annually
51–200 email accounts
billed annually
200+ email accounts
billed annually
How many email accounts do you need?
Drag the slider or type a number to estimate your cost.
Per account / mo
$1.00
Monthly equivalent
$50
Annual total
$600
Billing is handled securely through our billing portal. Switch between monthly and annual anytime — pricing updates automatically as your team grows.
Every plan includes
No “Pro” gating — all customers get the full platform.
- Centralized email signature management
- Email-safe signature builder
- Microsoft 365, Google Workspace & Exchange SMTP
- Custom SMTP support
- Directory sync for users and groups
- Campaign banners
- Legal disclaimers
- Signature rules and testing
- Usage & engagement analytics
- Logo, banner, photo & QR asset storage
- Team and user role management
- Secure billing portal & invoicing
Frequently asked questions
Still curious about something we haven't covered? Our team is one message away.
Email signature management software lets one administrator centrally create, deploy, and enforce branded, compliant email signatures across every employee mailbox — instead of asking each person to set up their own. Instant Signer connects to your directory, pulls user details, and keeps signatures consistent and up to date automatically.
Most teams are live within an afternoon. You grant read-only directory access and add a single mail-flow connector — there are no agents to install on individual machines.
No. For cloud deployment, messages are stamped in transit and never stored. We process MIME content in memory, add the signature, and hand the message straight back to your email platform.
Yes. Every signature is rendered as bulletproof, table-based HTML with inline styles and plain-text fallbacks, and previewed across major clients before you publish.
Microsoft Entra ID, Google Workspace Directory, Okta, and common HRIS systems. Sync runs automatically and can be triggered manually at any time, with user-editable overrides.
You're billed per managed email account, with annual or monthly options. Subscriptions, invoices, and payments are managed in a secure billing portal.
Yes — every account starts with a free trial. No credit card required to get started, and you can cancel anytime.
Make every email work harder
Join 2,500+ companies turning email signatures into their most consistent, on-brand, and measurable channel.
- Free trial
- No credit card to start
- Live in an afternoon