The hardest question on most advisory calls right now. The cost story for Teams Phone is compelling, but it's not the right call for every organization. Here's the honest breakdown.
Teams Phone is a smart, cost-effective move for knowledge-worker organizations already deep in Microsoft 365. It is not a drop-in replacement for a purpose-built UCaaS platform if you have a sales team, a contact center, complex IVR routing, or heavy outbound calling volume. Know which camp you're in before you commit.
Illustrative monthly cost per user for a 150-person organization on Microsoft 365 E3. Negotiated rates through Bridgepointe.
| Scenario | Teams Phone | Traditional UCaaS |
|---|---|---|
| Base M365 license | $22/user/mo (E3, included) | $22/user/mo (E3, still needed) |
| Phone add-on | $8–10/user/mo | $15–25/user/mo (standalone) |
| PSTN calling | $10–12/user/mo (Calling Plan) | Included in most UCaaS tiers |
| Blended total | $40–44/user/mo | $37–47/user/mo |
| Direct Routing option | $6–8/user/mo add-on (bring your own PSTN) | N/A |
With Direct Routing, Teams Phone becomes significantly cheaper, sometimes $10–15/user/mo less than a standalone UCaaS platform. The catch: Direct Routing requires a certified SBC and ongoing management overhead.
| Area | Teams Phone | Traditional UCaaS |
|---|---|---|
| Admin experience | Familiar for M365 admins; Teams Admin Center | Purpose-built telecom admin; more telephony control |
| Call quality | Good for knowledge workers; variable on edge devices | Purpose-engineered voice infrastructure |
| IVR / Auto-attendant | Capable for basic menus; limited nested routing | Deep, flexible call routing on most UCaaS platforms |
| Call queues | Basic queue functionality; limited agent features | Advanced queuing, overflow, callbacks, wallboards |
| Contact center | Via certified CCaaS partners (extra cost and vendor) | Native or tightly integrated CCaaS on most platforms |
| Video meetings | Best-in-class for Microsoft shops | Varies; Zoom Phone + Meetings is comparable |
| Mobile app | Teams mobile, familiar but heavy | Most UCaaS platforms have lighter, faster mobile apps |
| CRM integration | Native M365 integrations; Dynamics best-in-class | Salesforce, HubSpot, ServiceNow depth on RingCentral/Dialpad |
| Analog / fax support | Via ATA devices; more complex to configure | Most UCaaS platforms handle analog lines cleanly |
| Uptime SLA | 99.9% (Microsoft published SLA) | 99.999% on RingCentral, 8x8 enterprise tiers |
| HIPAA compliance | Yes (with BAA) | Yes on all major UCaaS platforms |
| E911 compliance | Requires additional configuration per site | Handled natively on most UCaaS platforms |
This decision is almost always made wrong when organizations look only at licensing cost. The right question isn't "which is cheaper?", it's "what does my workforce actually need to do on the phone?" Answer that first.
You're M365-native, most users just need a business phone number, and you don't need a contact center or complex routing.
You have a sales or support team, complex call flows, or need purpose-built voice reliability and CCaaS capability.
We've helped hundreds of organizations navigate this exact decision. Tell us about your environment and we'll give you a straight answer.
Get a personalized recommendationWe'll model out both Teams Phone and UCaaS options against your actual environment and tell you which makes financial and operational sense for your org.