Telnyx

Specializes exclusively in wholesale two-way SIP trunking, local origination, and virtual DID/toll-free number coverage across more than 80 countries with carrier-grade APIs and portal management.

Tier 1 global communications provider owning a native IP voice network that delivers international wholesale SIP trunking, local DID origination, and emergency calling across 65+ countries.

Major international wholesale voice carrier and Tier 1 interconnect providing telcos, CPaaS platforms, and global enterprises with wholesale SIP trunking and cloud DID numbering across 120+ territories.

Operating under the enterprise networking arm of Sinch, the former Voxbone infrastructure powers global inbound SIP origination and compliant local DID inventory in over 65 countries via direct PSTN interconnections.

Provides wholesale voice origination, DID numbers, and A-Z SIP termination via IDT Global and IDT Express, drawing on one of the industry's longest-standing international carrier routing footprints.

Delivers global wholesale SIP trunking and international DID inventory spanning 150+ countries with self-service management, flexible porting, and native cloud peering capabilities.

Global Tier 1 carrier delivering wholesale voice and unified communications connectivity, providing large service providers with cross-border SIP trunking and regulatory-compliant international DIDs.

Specialized wholesale VoIP and virtual numbering provider operating its own autonomous system (AS13006) and physical PoPs worldwide, supplying wholesale SIP trunks and local DIDs across 70+ nations.

Major pan-European and Asia-Pacific telecommunications infrastructure provider offering enterprise-grade wholesale SIP trunking and full-replacement DID numbering across key financial and telecom hubs.

Twilio is widely regarded as the industry-standard CPaaS provider, delivering enterprise-scale APIs and SDKs for programmable messaging (SMS, MMS, WhatsApp), voice, video, and multi-factor verification (Twilio Verify).

Sinch operates a global Tier-1 super network delivering programmable messaging, voice calling, verification, and email APIs with extensive direct carrier connections.

An Ericsson subsidiary, Vonage offers developer-focused communications APIs spanning programmable SMS, MMS, WhatsApp, Voice, WebRTC video, and Verify APIs for fraud prevention.

Infobip provides global omnichannel communication APIs across SMS, RCS, WhatsApp, voice, and identity verification, underpinned by over 800 direct operator connections.

Bandwidth pairs its nationwide and global carrier IP voice network with programmable voice, messaging, MFA, and emergency services APIs for high-volume enterprise traffic.

Plivo provides enterprise-grade, cost-effective cloud APIs for two-way SMS, MMS, voice calling, SIP endpoints, and multi-factor authentication across 190+ countries.

Formerly MessageBird, Bird delivers developer-first APIs for programmatic SMS, WhatsApp, conversational voice, and verification backed by global telecommunications routing.

AWS delivers developer SDKs and cloud APIs to embed real-time audio, video, messaging, and PSTN audio calling directly into web and mobile applications.

Agora specializes in real-time engagement APIs, offering developers low-latency interactive voice, video calling, and chat SDKs supported by its Software-Defined Real-Time Network (SD-RTN).

Twilio provides developer-centric APIs and comprehensive software development kits for programmatically embedding SMS, MMS, voice calling, conversational messaging, and omnichannel chat into modern applications at worldwide scale.

Sinch delivers a carrier-grade communications platform offering programmatic APIs for global SMS, voice calling, RCS, and conversational channels like WhatsApp, backed by hundreds of direct mobile operator connections.

Infobip offers a full CPaaS suite with extensive international operator coverage, unified APIs for multi-channel messaging (SMS, RCS, WhatsApp, Viber), and voice capabilities optimized for enterprise engagement.

Vonage, a subsidiary of Ericsson, provides flexible communications APIs enabling developers to easily integrate global SMS, programmable voice, video, and social messaging channels into enterprise software stacks.

Bandwidth operates its own nationwide and global all-IP telecom network, providing software developers with direct carrier-grade APIs for programmable voice, SMS, MMS, and emergency call routing.

Plivo delivers developer-friendly, cost-effective APIs to send SMS, manage phone calls, and build conversational messaging experiences across over 190 countries.

Bird provides a global omnichannel messaging and voice API platform connecting applications directly to SMS, WhatsApp, and conversational interfaces with integrated orchestration and flow builders.

CM.com delivers global CPaaS solutions providing REST APIs for transactional SMS, programmable voice, RCS, and chat applications with native payment and security tools.

Route Mobile delivers cloud communications and A2P messaging infrastructure, offering global enterprise APIs for SMS, voice, identity verification, and conversational messaging channels.

Nationwide Tier-1 CLEC network owner providing direct wholesale SIP trunking, local/toll-free origination, and termination with carrier-grade control and compliance for high-volume enterprises and service providers.

Through its Inteliquent carrier backbone, powers expansive nationwide wholesale voice origination, termination, and SIP interconnection reaching over 93% of the U.S. population.

Leading competitive local exchange carrier (CLEC) providing wholesale SIP trunking, local transit, and origination/termination services across thousands of U.S. interconnections.

Specialized wholesale SIP trunking provider tailored for MSPs, integrators, and software platforms, featuring the HyperNetwork route-optimization engine and self-service DID origination.

Delivers wholesale carrier services originating from its VoIP Innovations division, offering multi-carrier origination, termination, and DID warehousing tailored for MSPs and resellers.

Wholesale voice platform combining thinQ multi-carrier least-cost routing (LCR) with scalable inbound DID origination and automated outbound failover for communications providers.

Dedicated BCM One brand focused on enabling MSPs and PBX resellers with turnkey wholesale SIP trunking, automated telecom tax collection, and customer billing tools.

Provides Elastic SIP Trunking with instant global provisioning, carrier-grade U.S. termination/origination reach, and deep enterprise PBX/SBC interoperability.

Engineered for contact centers and voice resellers requiring direct Tier-1 carrier routes, elastic SIP trunking, full STIR/SHAKEN attestation, and developer-friendly voice APIs.

Offers industry-standard programmable voice APIs, global carrier connectivity, SIP trunking, WebRTC SDKs, and comprehensive call orchestration primitives for technical teams.

Operates an owned Tier-1 nationwide IP voice network in the US with global reach, offering low-latency Voice APIs, real-time media streaming, and direct SIP orchestration.

Provides mature voice APIs with JSON-based Nexmo Call Control Objects (NCCOs), SIP interconnects, WebRTC clients, and extensive global telecommunications reach.

Features a Tier-1 global mobile and PSTN network with programmable voice REST APIs, bidirectional voice streams, and SIP interconnectivity for enterprise applications.

Delivers developer-focused Voice APIs and XML call control primitives, supporting automated call routing, global SIP endpoints, and real-time audio streaming over WebSockets.

Founded by the creators of FreeSWITCH, offering advanced low-latency Call Fabric APIs, SWML orchestration, and native SIP/WebRTC bridging built for real-time applications.

Maintains an extensive carrier network with programmable Calls APIs, enabling global inbound/outbound voice routing, audio broadcasting, and SIP integration.

Specializes in modern real-time WebRTC infrastructure with SIP inbound/outbound gateways, ideal for low-latency voice applications, dynamic bridging, and AI agent media pipelines.

Provides real-time engagement APIs through an ultra-low latency software-defined network, offering voice SDKs and SIP integration gateways for telephony-to-app communication.

Offers dedicated software for cross-carrier outbound caller ID reputation tracking, real-device display testing across major US wireless networks, and managed or self-serve spam flag remediation workflows.

Provides enterprise entity identity management, centralized number registration, and automated monitoring and remediation services across major US carrier analytics engines.

Supplies real-time reputation monitoring and alert systems across tier-one carrier networks to detect spam or scam labels and manage remediation and caller presentation.

Operates carrier-integrated voice intelligence software providing caller reputation scoring, automated spam status auditing, and business caller ID registration.

Provides carrier-layer caller identification intelligence, caller name optimization, and redress tools to monitor and remediate wrongful spam labeling and call blocking.

Delivers network-level analytics, telephone number reputation scoring, and redress verification workflows for outbound call originators across US wireless and wireline operators.

Offers specialized compliance and caller ID deliverability software to identify spam flags across US mobile networks and coordinate redress to clear mislabeled outbound caller IDs.

Delivers multi-carrier phone number registration, continuous reputation monitoring, and assisted remediation across call-analytic engines to keep outbound caller IDs verified.

Monitors outbound dialing numbers against major US carriers and third-party call blocking databases, initiating automated remediation requests when spam flags are discovered.

Operates an enterprise-grade global IP voice network covering over 60 countries with direct-to-carrier connectivity, native BYOC support for major CCaaS/UCaaS platforms (Genesys, Microsoft Teams, Zoom Phone, Cisco Webex), and built-in global emergency calling compliance.

Provides Elastic SIP Trunking with global PSTN termination and origination, offering instantaneous self-service provisioning of international DIDs/toll-free numbers across 100+ countries, failover disaster recovery routing, and native support for major enterprise PBX and contact center systems.

Offers tier-1 international voice reach through its Global SIP Connect service, delivering extensive two-way PSTN replacement, full regulatory compliance, and multi-cloud collaboration interconnections across North America, Europe, and Asia-Pacific.

Provides scalable Elastic SIP Trunking powered by owned tier-1 carrier infrastructure, delivering direct PSTN interconnects, global virtual phone numbers, and enterprise integrations with platforms like Genesys Cloud CX and Microsoft Teams.

Delivers global cloud SIP trunking and international number coverage across 120+ countries, offering specialized BYOC and SIP link integrations for major contact centers and UCaaS providers with integrated regulatory compliance.

Provides enterprise-grade SIP trunking (VoIP Access) with deep pan-European and Asian metropolitan network footprint, offering fully compliant PSTN replacement, DDI allocations, and certified direct routing for cloud collaboration suites.

Provides Vodafone Business Global SIP, consolidating international corporate voice across dozens of countries with carrier-grade SLAs, centralized routing, and certified enterprise UC/CCaaS interoperability.

Delivers BT Global SIP, enabling multinational organizations to centralize PSTN access, port existing numbers, and connect legacy PBXs or cloud platforms (such as Cisco Webex, Microsoft Teams, and Zoom) across international territories.

Features a Tier 1 global IP backbone providing enterprise SIP Trunking, BYOC connectivity, and virtual number porting for cloud-connected environments including Microsoft Teams, Cisco Webex Calling, and Google SIP Link.

Offers an industry-standard developer ecosystem for programmable SMS, MMS, RCS, and voice APIs with tier-1 carrier redundancy and proven enterprise scalability across North America and worldwide.

Maintains direct Tier-1 carrier interconnections across North America and globally, powering enterprise programmable messaging, voice calling, and conversational APIs with carrier-grade reliability.

Operates its own nationwide CLEC IP voice network in North America while providing programmable voice, messaging, and emergency calling APIs backed by direct network infrastructure across over 60 countries.

Features extensive direct operator connectivity and data centers worldwide, delivering resilient programmable voice, SMS, RCS, and omnichannel messaging APIs tailored for global enterprise requirements.

Ericsson-owned enterprise communication platform delivering robust programmable voice, SIP, and messaging APIs with global carrier reach and carrier-grade infrastructure.

Provides scalable, cost-efficient cloud communication APIs for programmable voice and SMS with carrier-direct connections spanning North America and over 190 countries.

Operating under the Bird brand, provides high-throughput developer APIs for SMS, voice, and omnichannel messaging with carrier failover capabilities across international networks.

Founded by the authors of the open-source FreeSWITCH engine, delivering developer-first programmable unified communications, low-latency voice, and messaging infrastructure.

Leverages global Tier-1 telecom infrastructure and subsea network connectivity alongside Kaleyra assets to deliver enterprise-grade programmable voice and messaging APIs internationally.