Build multi-modal AI applications using our new open-source Vision AI SDK .

Tutorials

How To Design AI Voices in Minutes Using Qwen3-TTS

Before You Start To begin, ensure that you meet these requirements and have the following credentials. Python 3.13 or a later version. An Apple Silicon Mac (recommended) or any modern laptop. Stream API credentials (for realtime audio and video communication). A HuggingFace Account and access token (HF_TOKEN). A Deepgram API key (for speech-to-text). A Google
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11 min read

HIPAA-Compliant Chat: How to Build Secure Messaging for Telemedicine Apps

Every message in a healthcare chat contains protected health information the moment a clinician pairs a patient name with a diagnosis, lab result, or appointment. That makes your chat infrastructure a HIPAA compliance surface, whether you designed it to be one or not. This guide covers what HIPAA actually requires of a messaging system, how
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15 min read

The 6 Best On-Device TTS Models for Voice AI

When building voice AI applications, you have industry-leading cloud options for text-to-speech, such as Cartesia Sonic 3 and Grok TTS. For privacy and to avoid sharing your business’s data with these commercial text-to-speech (TTS) providers, your team may want to use free, open-source solutions that run locally on mobile and desktop devices. Continue reading to
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21 min read

Build a Restaurant Reservation AI Agent With Turbopuffer and Twilio

Let’s build a restaurant reservation system to speak with a voice agent via a real-time phone call. The service will have three main features: Agent Outbound Call: The agent can act as both a customer helper and a restaurant assistant. For example, it can be configured as an AI restaurant employee that calls customers back
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12 min read

Grok TTS + Vision: Build a Healthcare Appointment Agent

This step-by-step guide will help you build an AI front-desk receptionist that interacts with patients through conversations, assesses their conditions, and advises whether to visit a doctor or seek online medical advice. When an agent can see the patient’s condition in real time, it can make a smarter recommendation, saving patients an unnecessary trip to
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12 min read

How to Build an App Like TikTok Shop (+ Turn Livestreams into Revenue)

Livestream shopping is changing how people discover and buy products online by combining real-time video with instant purchasing. Platforms like TikTok have popularised this model, enabling creators and brands to showcase products live while viewers shop without leaving the stream. In this tutorial, you’ll learn how to build a TikTok-style livestream shopping application using Next.js.
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19 min read

How to Build a Slack Clone with React Native

In this three-part tutorial series, you'll build a fully functional Slack clone for iOS and Android using Stream's React Native SDK. By the end, you'll have a working app that closely mirrors Slack's UI and functionality, complete with dark mode support, emoji reactions, GIF previews, and a message action sheet. What You'll Build Over the
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2 min read

Slack Clone Part 1: Project Setup & Messaging UI

In this tutorial, you will create a clone of Slack, a workplace messaging platform in React Native. The Slack application consists of three parts and includes several features. This first part covers the following UI/UX features: Channel List: Contacts in popular messaging apps like WhatsApp. Input Box: For composing messages. Message Row: For displaying incoming
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11 min read