Email signatures. Synced. Stamped. Delivered.
Professional Email Signatures for Microsoft 365
Automatically stamp every outbound email with a branded signature. No Outlook plugins. No per-user setup. Just connect your tenant and go.
Hi Sarah,
Please find the updated proposal attached. Let me know if you have any questions — happy to walk through the details on a call.
Best regards,
Alex Chen
Senior Account Executive
T +1 (555) 234-5678
E alex.chen@acmecorp.com
W www.acmecorp.com
Trusted by Microsoft 365 teams
Everything you need to manage signatures at scale
From tenant connection to delivery logs — SigSync handles the full signature lifecycle without touching your mail flow.
One-Click Tenant Connect
Connect any M365 tenant in minutes with Azure app registration.
HTML Signature Editor
Design pixel-perfect signatures with a live split-pane editor.
User Sync
Automatically pulls user data from Entra ID — name, title, phone, photo.
Rule-Based Assignment
Assign different signatures by department, job title, or group.
Self-Hosted & Secure
Your mail never touches our servers. Deploy on your own infrastructure.
Delivery Logs
Full audit trail of every email processed and every signature injected.
How it works
Three steps from zero to fully branded outbound email.
Connect your M365 tenant
Register an Azure app and link your tenant in minutes. No Outlook plugins required.
Design your signature template
Use the HTML editor to build branded signatures with live preview and dynamic fields.
Every outbound email gets stamped automatically
SigSync injects the right signature on every message via the Exchange connector.
Why teams choose SigSync
See how SigSync compares to traditional signature platforms.
| Feature | SigSync | Exclaimer | CodeTwo |
|---|---|---|---|
| Self-hosted | |||
| Open source | |||
| Per-user pricing | |||
| Multi-tenant | |||
| HTML editor | |||
| Entra ID sync | |||
| Exchange connector | |||
| Free tier |
Simple, transparent pricing
Start free with self-hosted open source, or upgrade for multi-tenant and MSP features.
Self-Hosted Free
Open source, unlimited users on your own infrastructure.
- Unlimited users
- 1 tenant
- Community support
- Open source
Pro
For teams managing multiple tenants with advanced needs.
- Unlimited tenants
- Priority support
- Advanced rules
- Analytics dashboard
MSP
Built for managed service providers and resellers.
- White label branding
- Client portal
- Bulk tenant management
- SLA guarantee
Ready to sync your signatures?
Deploy SigSync on your infrastructure today. No credit card required for the free tier.