Bandwidth Alternatives (September 2025)

Plivo’s SMS API and Voice API platform enables businesses to communicate with their customers on a global scale. Sign up for free now.

Vonage APIs (formerly Nexmo) offers communications APIs, a global platform and expert support—empowering you to create exceptional customer experiences.

Enterprise Communications Platform as a Service (CPaaS)

Knowlarity is a leading cloud business communication solution provider with cloud telephony - virtual number, ivr, toll-free number, call center software, AI products (speech, chatbot and voicebots), video & messaging solutions.

Unlock meaningful conversations across the customer journey with programmable SMS, voice, email, video, & verification APIs!

LoopUp exists to provide multinational businesses with one global telephony provider, simplifying and centralizing telephony management and support, and delivering economies of scale. LoopUp is the world leader in global coverage for Microsoft's certified Operator Connect program.

Vonage offers flexible and scalable voice, messaging, video and data capabilities across Unified Communications, Contact Centers and Communications APIs.

Communications API for chat, AI chatbots, SMS, WhatsApp, voice, video, KakaoTalk, and in-app notifications with Sendbird's all-in-one communications API platform.

Connect with customers on their preferred channels—anywhere in the world. Quickly integrate powerful communication APIs to start building solutions for SMS and WhatsApp messaging, voice, and email.

MSG91 cloud communications platform integrates cloud-based voice, video, messaging, chat, & collaboration into any app, service, or business process. Request a demo for cloud based communication today!

Build your very own omnichannel customer engagement platform with a no-code builder or customize it with Video, Voice, SMS, and chatbot APIs from EnableX.

Build real time chat, voice and video calling experience with CometChat's flexible SDKs, APIs & UI Kits. Sign up now!

Business communication solutions from net2phone streamline workflows, effortlessly collaborate, and build customer relationships that last.

The Real-Time Engagement Platform for meaningful human connections. People engage longer when they see, hear, and interact with each other. With Agora, you can embed vivid voice and video in any application, on any device, anywhere.

One-stop Cloud Communication Platform. Try Acefone’s omnichannel services, cloud contact centers, & virtual number calling. Get Free Trial Now!

Start sending transactional and marketing email in minutes. Easily scale to enterprise-volume with Twilio SendGrid’s Email API. Try it free!

Telnyx offers solutions tailored to your industry needs, from AI to call tracking. Enhance your business capabilities with our specialized solutions.

Megaport offers scalable bandwidth for public and private cloud connections, metro ethernet, Data Centre backhaul, and Internet Exchange Services.

Ensure communication with customers and suppliers, modernize messaging infrastructures and automate manual business processes thanks to Retarus’ intelligent cloud solutions.

Engage your customers and prospects with simple drag and drop email, SMS, chatbot or build custom solutions with the best in class APIs

Engage your customers and prospects with simple drag and drop email, SMS, chatbot or build custom solutions with the best in class APIs

Validate users across SMS and preferred channels at scale with the Twilio Verify API, a turnkey, passwordless authentication solution that enables seamless and secure user onboarding, reduces fraud, and optimizes delivery rates without the heavy lifting. Twilio handles all your connectivity, channels, OTP generation, and more—so you don’t have to.

Discover fast connectivity with Console Connect, a software-defined interconnection provider by PCCW Global. Simplify and secure your network connections here.

Crexendo is a leading provider of scalable communication systems for businesses. Enabling the modern workforce through remote communication and collaboration.

Access our top-tier SMS gateway services at an affordable price globally. No subscriptions and full compliance. Create a free account >>

AI transformation partner for enterprises, driving increased revenue, reduced costs, and enhanced customer experience with Exotel solutions.

Telzio provides cloud-based phone systems with a modern interface and scalable pricing. Complete end-to-end solution with powerful call routing features.

Infinite Connect offers powerful unified cloud communications as a service, team collaboration tools, and VoIP phone service for business.

Kong is the most widely adopted API gateway and service mesh, powering the world’s APIs for modern architectures. Accelerate development and productivity today!

OneCloud provides UCaaS solutions for businesses of all sizes. Manage calls, voicemails, business texts, video conferencing, and more on any device, and from any location.

Next generation programmable video and audio integration solutions for today's world. Iotum’s audio and video conferencing and streaming API and SDK solutions.

Experience the power of advanced cloud communications with CallTower's unified, connected solutions. Stay connected, productive, and happy.

Intermedia's Unite platform offers unified communication solution for SMBs that combines a phone system, video conferencing, & more. Get a quote today!

Plataforma de Comunicación Omnicanal. Crea una estrategia de comunicación global e integra todos tus canales de comunicación.

RUCKUS Networks is a leading provider of purpose-driven enterprise networks. We design and build truly purpose-driven network infrastructure that meets the strictest requirements of all kinds of enterprise environments. Our customers trust us to deliver exceptional network experiences and were backed by the corporate resources of CommScope.

Simple, scalable and reliable. Hosted realtime APIs loved by developers and trusted by giants. Build live dashboards, notifications, geotracking, chat and more.

Aviatrix secure cloud networking software is purpose-built for your business, delivering enterprise-grade networking with security, agility, and cost-optimization in mind.

Plan, manage, and execute your business’s important moments using GlobalMeet, the most secure and reliable webcasting platform.

Omnichannel Contact Center Platform. Connect Southeast Asia Virtual Phone Numbers

Akamai Connected Cloud is a massively distributed edge and cloud platform that keeps experiences closer to users — and threats farther away.

HarperDB's global application platform simplifies development with one package that includes a lightning-fast database, embedded API server, and real-time global data replication. Deploy from cloud to edge to on-prem.

Unlock the power of your communications data. The Nylas communication APIs remove complexity & empower teams to create seamless user experiences.

Onomondo's IoT connectivity, platform and cloud technology future-proof IoT solutions with full data transparency, freedom to leave, and no third parties.

Streamline business communication with RingEX. Enjoy unified communications and collaboration with our all-in-one solution.

Build and scale your IoT solution anywhere with emnify - the world’s first cloud-native connectivity platform and our global IoT SIMs.

Hyperledger Foundation is the open source, global ecosystem for enterprise-grade blockchain technologies at the core of critical developments globally.

Get started for free and integrate WebRTC video calls into your website or app using the Whereby API and SDK.

APIs Delivering Global Verification and Programmable Communications as a service. SMS, Voice, and phone number intelligence solutions. Get started now.

Solve hybrid work with smarter video conferencing. Webex Meetings provides cost-effective enterprise solutions for virtual meetings and collaboration.

Setplex OTT platform allows operators to launch end to end OTT/IPTV solutions from content management and monetization, to video delivery, multi-screen apps and analytics

FortiVoice Unified Communications and collaborations as service offer simplified management in both centralized and distributed environments helping organizations keep up with changing communication needs due to evolving infrastructure.

Datto’s Autotask Professional Services Automation (PSA) is a powerful and intuitive cloud-based PSA platform providing a singular view of the entire business.

Nextiva unites every conversation along the entire customer journey. One business communication platform for voice video, chat, social media, and email.

OVHcloud is a global, cloud provider delivering hosted private cloud, public cloud, and dedicated server solutions trusted by over 1.5 million developers.

The business phone and communication platform trusted by teams everywhere. Set up a cloud-based call center and integrate with your CRM & Helpdesk software in minutes.

Enjoy fast, private cloud connections—including MPLS VPN connections—between Azure and on-premises datacenters with Azure ExpressRoute.

Engagespot is a notification infrastructure that helps developers build delightful multi-channel communication experiences in their web and mobile apps.

Symphony is the most secure and compliant markets’ infrastructure and technology platform, where solutions are built or integrated to standardize, automate and innovate financial services workflows. It is a vibrant community of over half a million financial professionals with a trusted directory and serves over 1000 institutions. Symphony is powering over 2,000 community built applications and bots.

Particle helps the world's most innovative companies power their connected machines, vehicles, and products.

Forward Networks' flagship software, Forward Enterprise, delivers the best digital twin technology to the world's largest networks. Multi-vendor fully-scalable

An all-in-one online platform helps businesses send and receive SMS messages, make calls, and send and receive faxes globally.

JustCall is an All-in-One Business Communication Platform that offers a cloud phone system and SMS solution for sales and customer support teams. Leverage automation, analytics, and other call tools for contact centers.

Take the first step to innovative workplace communication with a stable communication core, advanced collaboration tools, and best-of-breed integrations that keep your tech stack intact.

An IoT platform is a set of software tools to connect and manage devices. Cumulocity IoT, the #1 self-service IoT platform, adds tools for integration and analytics.

Marketing Campaigns makes it easy to design, test, optimize and scale email campaigns. Reach the inbox with Twilio SendGrid. Try it free!

Entri is the API for custom domains. We make it easy for your application to connect, secure, sell, and power custom domains.

iQ3Connect provides a web-based solution empowering individuals, teams, and enterprises to create, deploy, collaborate, and learn...

Developer APIs / SDKs for enterprise-ready features like Single Sign-On (SSO/SAML), Passwordless Authentication, Directory Sync (SCIM), Audit Trail (SIEM), and more. Get started for free.

FireHydrant is with you throughout the entire incident lifecycle from first alert until you've learned from the retrospective. Reduce alert fatigue, guide responders, reduce MTTR and run stress-less retrospectives - all in a single, unified platform.

Appwrite is an open-source platform for building applications at any scale, using your preferred programming languages and tools.

Flock, the best team communication app and online collaboration platform, comes with team messaging, project management and other great features that improve productivity and boost speed of execution.

Mitel previously offered several Unified Communications as-a-Service (UCaaS) products as part of its portfolio.

Meter builds networking infrastructure. The best hardware, software, and operations for routing, switching, wireless, and applications. All for one monthly fee.

To meet today's Cyber Security challenges, enterprises need an integrated cyber defense platform that integrates industry-leading solutions and solves for the most pressing C-level challenges like evolving threats, privacy & compliance, and digital transformation.

World’s Most Expressive API for building Disruptive Prop-Tech.

Office@Hand from AT&T Business is an easy-to-use phone, fax, messaging and conferencing system to connect employees, clients and customers in a single solution.

Check your internet speeds with our online speed test. Connect your entire business with one call. Fusion Connect is your cloud solution provider for VoIP, MS Teams, hosted service, internet, & secure networking. Call today!

Niezawodne Email API i SMTP w chmurze. Najwyższa dostarczalność i szczegółowa analityka wiadomości email wysyłanych z Twojego systemu lub aplikacji.

Apiary provides the leading API-First platform designed specifically to help companies accelerate and control the design, development, and documentation of APIs.

GroupTalk is a cloud based Push to Talk service for team communication and security solutions for businesses with iOS and Android devices.

Experience powerful live streaming with Wowza Streaming Engine. Deliver high-quality content globally with unmatched reliability. Learn more.

Streams by PanTerra: Cloud solution for mid-market enterprises with unified communications, collaborations, file sharing, and analytics.

Weave brings together a world-class phone system and a suite of communication tools, so it's easy to automate more tasks, keep schedules full, get paid faster, collect more reviews and much more.

Render is a unified cloud to build and run all your apps and websites with free TLS certificates, global CDN, private networks and auto deploys from Git.

Add real-time video calls and livestreaming to your app with fully customizable UI, APIs to manage rooms, interactivity APIs to add chat, whiteboard, polls and more.

api.video lets you quickly and securely deliver on-demand and live-stream videos directly from your website, software, or app.

Learn about the many Hybrid Cloud benefits and Advantages that make a Hybrid Solution so Compelling to so many Businesses | Learn More with Rackspace

Bitpace. Unlock the Future of Payments. Your crypto payment partner for secure and fast transactions.

Knowlarity provides the best cloud IVR(Interactive Voice Response) System or solution for your business which is an automated call management solution. Use our top hosted IVR service to respond to all the customer queries professionally with personalized greetings.

Discover the TIBCO® Platform––Messaging for seamless, real-time data distribution across your enterprise. Our platform offers diverse messaging components like TIBCO Enterprise Message Service™, TIBCO® Messaging Quasar, and more, ensuring high-performance, secure, and reliable data exchange for complex IT environments. Explore our solutions tailored for cloud integration, IoT, and event-driven architectures

webinar.net is a feature-packed, easy-to-use on demand webinar platform, allowing you to setup fully branded, online presentations with unlimited attendees in less than 60 seconds.

From signing to filing, it's never been easier or more affordable to engage customers with API toolkits from the leader in online legal services.

Aiven for Apache Kafka – Managed event streaming Kafka service ✓ Microservices ✓ Event-driven architecture ✓ Streaming pipelines ✓

ZeroTier is the best global networking solution and overlay for IoT infrastructure, SD-WAN, VPN, and remote access.

Zuplo is the API management platform for developers. Build, deploy, and scale APIs faster with Zuplo.

Pliant’s API-driven orchestration platform automates, integrates, and connects the digital enterprise. With our low-code approach that transforms API code into deployment-ready action blocks, Pliant facilitates, integrates, and secures communication up and down the technology stack between platforms, services, and applications. Pliant accelerates traditionally manual tasks, eliminates silos, and reduces tool sprawl while accelerating innovation, productivity, and agility.

Abstract provides powerful APIs to help you enrich any user experience or automate any workflow. Used by 10,000+ developers worldwide.

Streamline media management and improve user experience by automatically delivering images and videos, enhanced and optimized for every user.

Enterprise grade AI security platform with a privacy focus. Replace reCAPTCHA v2, v3, or Enterprise with next generation tech at better value. Used by millions.