Contact sync that scales with your practice
Deploy CYNC across every Microsoft 365 tenant you manage. On-premise, Graph-API-native, and priced so you keep your margin — starting at €0.29/user/month with 10 users free per tenant.
- 10 users free per tenant
- No credit card required
- 5-minute install
- On-premise
- Graph API native
- 10 users free / tenant
- Server Core ready
The MSP challenge
Contact sync shouldn't be this hard
Every IT admin knows the pain: company contacts don't appear on mobile devices. For MSPs managing dozens of tenants, the problem multiplies.
Script sprawl across tenants
Maintaining per-tenant PowerShell scripts is fragile. Credentials expire, EWS endpoints break silently, and there is no central view of what is working.
Per-user costs eat your margin
Cloud sync solutions like CiraSync are widely reported around $5/user/month. Across 20 tenants that cost compounds fast — leaving little for your managed-service margin.
Client data leaves the network
Cloud-based sync tools route contact data through third-party servers. For regulated clients that is a deal-breaker — and a liability for your business.
Why MSPs choose CYNC
Purpose-built for multi-tenant management
One installation per tenant. No cloud middleman. Pricing that preserves your margin.
On-premise architecture
CYNC runs as a Windows Service on your client's server or VM. Contact data never leaves the tenant — perfect for healthcare, legal, and finance clients.
Modern Graph API
Built entirely on Microsoft Graph — no EWS dependency. Fully compatible with Microsoft's post-2026 roadmap and Entra ID certificate auth.
Server Core & headless
Deploy on Windows Server Core or headless VMs. Manage remotely via gRPC over HTTPS with Windows-integrated authentication — no RDP required.
Volume pricing
Starting at €0.29/user/month with bracket discounts down to €0.18/user. 10 users free per tenant — small clients cost nothing. Annual billing saves even more.
Centralized sync dashboard
Monitor sync history, errors, and license status across all tenants from the WinUI 3 dashboard — locally or remotely via gRPC over HTTPS.
Enterprise security
Certificate-based Entra app registration, no stored passwords, timing-safe secret comparison, and RSA-signed license keys. SOC 2 and GDPR friendly.
Deployment
Live in three steps per tenant
Deploy, connect, and start syncing in under 5 minutes. Repeat for every client.
Step 01
Install on the client's server
Download the MSI, run the setup wizard (or silent-install via CLI), and register your license key. Takes under 5 minutes per tenant.
Step 02
Connect to Entra ID
Point CYNC at the tenant's Entra ID app registration (certificate auth). Choose source groups and target mailboxes — CYNC handles the rest.
Step 03
Monitor from anywhere
Use the WinUI dashboard locally or connect via gRPC over HTTPS for remote monitoring. View sync history, errors, and license status across all tenants.
Comparison
CYNC vs cloud sync solutions
See how an on-premise, Graph-API-native approach compares to legacy cloud tools.
Architecture
CYNC
On-premise Windows Service
Cloud tools
Cloud SaaS
Data residency
CYNC
Client's own server
Cloud tools
Third-party cloud
API technology
CYNC
Microsoft Graph (modern)
Cloud tools
Graph + legacy EWS
Pricing (per user/month)
CYNC
From €0.29
Cloud tools
~$5 (reported)
Free tier
CYNC
10 users per tenant
Cloud tools
None
Server Core support
CYNC
Yes
Cloud tools
N/A (cloud)
Remote admin
CYNC
gRPC over HTTPS
Cloud tools
Web portal
Deployment
CYNC
MSI + silent install
Cloud tools
Browser setup
Certificate auth
CYNC
Built-in
Cloud tools
OAuth only
Obfuscated binaries
CYNC
Yes (Obfuscar)
Cloud tools
N/A (hosted)
Pricing
Transparent, volume-friendly pricing
No per-tenant platform fees. No hidden charges. Just a simple per-user price that drops as your clients grow.
Starting at
€0.29/user/month
Volume discounts down to €0.18/user on annual plans. First 10 users free per tenant.
50-user tenant
Monthly: €11.60/mo
Annual: €11.60/mo
200-user tenant
Monthly: €53.20/mo
Annual: €51.30/mo
500-user tenant
Monthly: €122.50/mo
Annual: €102.90/mo
FAQ
Common MSP questions
Can I use one CYNC license across multiple client tenants?
Each tenant requires its own CYNC installation and license. However, the 10-user free tier applies per tenant — so small clients may not need a paid license at all.
How do I manage CYNC remotely without RDP?
CYNC's Windows Service exposes a gRPC endpoint over HTTPS with Windows-integrated authentication. You can monitor sync status, view history, and adjust settings from any machine on the domain — or remotely via VPN.
Does CYNC work on Windows Server Core?
Yes. The sync engine runs as a headless Windows Service that works on Server Core. The WinUI dashboard is optional and only needed for local interactive management.
What happens when Microsoft fully retires EWS?
Nothing — CYNC is built entirely on Microsoft Graph API. There is zero EWS dependency. Read our EWS deprecation guide for background.
Is there volume or partner pricing for MSPs?
CYNC uses automatic bracket-based volume discounts: the more users across a tenant, the lower the per-user price (down to €0.18/user/month on annual). Contact us for custom MSP partnership enquiries.
How does CYNC compare cost-wise to CiraSync?
CiraSync does not publish pricing, but figures widely reported online put it around $5/user/month. CYNC starts at €0.29/user/month — roughly an order of magnitude cheaper at most tiers. With 500 users on annual billing, CYNC costs approximately €102.90/month (request a current quote from CiraSync for an exact comparison).
Ready to streamline contact sync across your tenants?
Start with the free tier — 10 users per tenant, no credit card. Scale up with volume pricing as your clients grow.