VOIP FOR BUSINESSES

Enterprise-grade voice, delivered on a global network

Modernize your business communications with cloud voice platform that moves mission-critical calling to a Tier-1 US network and global partners with a 95+ country reach and 99.99% uptime. As a business VoIP service provider, it helps global teams scale reliably while consolidating costs.

Whether you’re migrating from legacy PBX, enabling Unified Communications (UCaaS), or building customer voice apps, Sinch moves your mission-critical calling to a Tier-1 network with global reach and high uptime.

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WHY SINCH

Three reasons enterprises choose Sinch for cloud voice

Sinch helps global businesses launch VoIP solutions fast, operate reliably, and cut costs by unifying communications on a Tier-1 network across voice, SMS, and email.

Fast global entry

Launch local numbers in 95+ countries and 16,000+ cities without new infrastructure or complex carrier contracts.

Enterprise reliability

Our Tier-1 owned and operated US network combines with rigorous global partnerships to deliver standard 300B+ minutes annually with 99.99% uptime.

Simplified management

Unify your enterprise VoIP, SMS, and email routing on one platform. Scale instantly with elastic capacity and lower your total cost of ownership (TCO) by eliminating fixed channels.

GLOBAL REACH

Enter new markets overnight with 90+ country coverage

Reach customers wherever they are without carrier negotiations or new hardware. The Sinch Super Network provides 92%+ on-net termination for quality and efficiency, letting you stand up local presence in minutes with Sinch VoIP. Manage 160M+ numbers globally, backed by 95%+ US population coverage.

  • 95+ countries, 16,000+ cities available

  • 92%+ on-net US termination for quality and savings

  • No infrastructure build-out or multi-partner juggling

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RELIABILITY

Enterprise-grade uptime for mission-critical communications

Your voice services stay online when it matters most. Sinch delivers SLA-backed reliability on a Tier-1 US network and via trusted global partners, carrying 300B+ minutes annually. Rely on 99.99% uptime for your most critical SIP and VoIP deployments.

  • 99.99% SLA

  • Tier-1 network with direct PSTN reach 

  • Handles 300B+ annual minutes for proven scale

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OPERATIONAL EFFICIENCY

Automate, consolidate, and lower your telecom TCO

Replace fragmented regional carriers with a unified global VoIP provider architecture. Manage voice, SMS, and email in one portal, scale capacity on demand via Elastic SIP, and document significant enterprise savings versus traditional telecom models.

  • One provider for voice, SMS, and email

  • Elastic capacity – no fixed channel overcommitments

  • Significant reduction in Total Cost of Ownership (TCO)

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TOP VOIP USE CASES

Where Sinch VoIP delivers impact

Migrate to UCaaS or CCaaS

Shift from legacy PBX/PSTN to cloud communications while retaining numbers, minimizing risk, and supporting global teams.

Retire legacy PBX/IVR

Replace aging on-prem systems with modern VoIP to access new CX features without costly hardware or multi-carrier complexity.

Embed communications into apps

Add real-time voice with Programmable Voice APIs for secure, high-quality customer interactions and flexible, custom call flows at global scale.

Power AI voice agents

Build next-gen conversational experiences with reliable, low-latency audio streams into AI platforms worldwide.

WHAT’S INCLUDED

Everything you need, built into one Tier-1 network

Direct routing control on our US core network

Paired with trusted international partners, it delivers predictable quality and global phone connectivity for business VoIP.

95+ country coverage

Instantly access local numbers and reach customers in the markets that matter.

99.99% reliability

SLA-backed service keeps business-critical calls online around the clock.

Elastic SIP Trunking

Scale channels on demand without overprovisioning or long-term commitments.

Programmable Voice APIs

Orchestrate calls, IVR, number masking, TTS, and real-time transcription, and leverage Voice Relay and Streams to connect AI agents and give them a voice—all through developer-friendly REST endpoints.

BYOC for Teams, Webex, & Zoom

Bring Sinch connectivity into Microsoft Teams, Webex, or Zoom to extend reach.

Instant burst capacity

Handle unpredictable traffic spikes without manual intervention or service tickets.

Enterprise-grade security

TLS, SRTP, strict IP ACLs, SIP authentication controls, network-level fraud prevention, STIR/SHAKEN, and SIP E911 compliance protect every conversation.

Frequently asked questions about Sinch VoIP

Sinch is a CPaaS (Communications Platform as a Service) provider. We provide the underlying Elastic SIP Trunking and Voice API that enterprises use to power their own cloud VoIP systems, contact centers, and unified communications platforms globally.

Yes. Sinch connects to existing PBX systems and allows number retention, avoiding disruptive rip-and-replace projects. Enterprise support goes beyond API-only options to de-risk deployments.

In the US, enterprise VoIP traffic runs directly on our Tier-1 owned and operated network. Internationally, we leverage direct partnerships to ensure end-to-end quality. Together, this architecture delivers standard 99.99% SLA for enterprises, ensuring high-quality, mission-critical calls worldwide.

Yes. Capacity scales on demand – aligning costs with actual usage – while keeping full SLA coverage and enterprise-grade quality.

Sinch is ISO 27001 and SOC 2 Type 1 & Type 2 certified; GDPR and CCPA compliant; HIPAA-ready with BAAs available; and built for emergency and regulated requirements with E911, NG911, Kari’s Law compliance, and RAY BAUM’S Act compliance, including 55M+ E911 calls handled annually and NG911 coverage for ~40% of the US population.

Globally, Sinch handles over 300 billion voice minutes annually, manages more than 160 million numbers, and connects to partner operators worldwide. In the US, our Super Network covers over 95% of the population and delivers 92%+ on-net termination.