SignalWire
An elastic communications cloud with advanced APIs for voice, SMS and video designed by the original geeks of software-defined telecom. When your audience is large, your brand is premium, and you won't settle for janky video conferencing UX, you want this. Real time, granular control over call flows, routing, and codecs. 300% more responsiveness than you get with REST. If you use AI in your voice apps, you just found your new favorite API. If you're more comfortable with REST than WebSockets or already use TwiML, these APIs are like TwiML...if TwiML suddenly knew Kung Fu. The SMS API makes it easy to move your expensive SMS traffic to SignalWire and cut your billio 50-80% in the process. Launch and scale communication products on infrastructure built for this decade and the next rather than running aground on the limitations of 2010s-era SaaS. Persistent, bi-directional connections between your video and voice apps and our infrastructure means 300% more responsiveness.
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Telnyx
See how the developer friendly Telnyx API can transform your business communications. Telnyx is an all-in-one communication platform designed to be tailored exactly to your needs. We created our network with real-time communications in mind so we can deliver quality calls, messaging, and data around the world. Easily build reliable messaging with our SMS API. Keep your data safe by setting up two-factor authentication using SMS or voice codes. Plug and play your VoIP setup in minutes and get carrier-grade voice with elastic SIP trunks. Our cloud-agnostic approach means you can rest easy knowing you are protecting in case of a network failure. With Telnyx deploy communications exactly to specifications.
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Twilio Voice
Create a scalable voice experience with the API that connects millions globally. With Twilio Voice, you can build unique phone call experiences with one API, to create, receive, control and monitor calls with just a few lines of code. Create an engaging voice experience that you can quickly scale and modify with a wide array of customization options and resources, like our Voice SDK. Then, add on features like Interactive Voice Response (IVR), recording transcriptions, and speech recognition to create an experience that your customers will appreciate.
Whether you're looking to set up global conferencing or alerts & notifications, Twilio has the support you need for building with Voice. Find docs, code samples, helper libraries, and developer tools such as Twilio Runtime and our visual workflow builder, Studio.
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Speechmatics
Best-in-Market Speech-to-Text & Voice AI for Enterprises.
Speechmatics delivers industry-leading Speech-to-Text and Voice AI for enterprises needing unrivaled accuracy, security, and flexibility. Our enterprise-grade APIs provide real-time and batch transcription with exceptional precision—across the widest range of languages, dialects, and accents.
Powered by Foundational Speech Technology, Speechmatics supports mission-critical voice applications in media, contact centers, finance, healthcare, and more. With on-prem, cloud, and hybrid deployment, businesses maintain full control over data security while unlocking voice insights.
Trusted by global leaders, Speechmatics is the top choice for best-in-class transcription and voice intelligence.
🔹 Unmatched Accuracy – Superior transcription across languages & accents
🔹 Flexible Deployment – Cloud, on-prem, and hybrid
🔹 Enterprise-Grade Security – Full data control
🔹 Real-Time & Batch Processing – Scalable transcription
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