7 Best Open Source Stream Alternatives
A curated collection of the 7 best open source and self-hosted alternatives to Stream in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for Stream in 2026? The top open-source alternative is Parlant — A conversational AI server that manages agent behavior through context-aware guidelines, keeping responses consistent, auditable, and aligned at scale..
Other highly rated open-source Stream alternatives include Ethora, Tiledesk and SAMA.
A conversational AI server that manages agent behavior through context-aware guidelines, keeping responses consistent, auditable, and aligned at scale.
A conversational AI server that manages agent behavior through context-aware guidelines, keeping responses consistent, auditable, and aligned at scale.
Unified chat & AI SDK for web, iOS & Android
Ethora provides a unified SDK to integrate real-time chat, AI agents, and interactive workflows into web, iOS, and Android applications. Designed for developers and businesses, it supports self-hosting for full data ownership and compliance with standards like HIPAA, SOC 2, and GDPR. - Cross-Platform SDK: Compatible with web, iOS, Android, React.js, React Native, and legacy systems. - AI Agent Builder: No-code tool to create AI agents with RAG capabilities by crawling websites and indexing documents. - Self-Hosting: Deploy on AWS, your own cloud, or on-premises for complete data control. - Vertical-Specific Solutions: Pre-configured SDKs for finance, healthcare, gaming, education, and more. - Voice & Video Chat: Real-time voice and audio rooms for enhanced user engagement. - Embeddable Widgets: Drop-in chat and AI agent widgets for any website or portal. - Compliance Ready: HIPAA, SOC 2, and GDPR compliant for sensitive industries. - Document Indexing: Turn unstructured documents into AI knowledge bases for RAG applications. Ethora is open-source and can be self-hosted on AWS, private clouds, or on-premises. The platform supports integration with existing infrastructure and provides tools for data privacy and security compliance. Documentation and support are available for developers to customize and extend functionality.
Open-source no-code AI chatbot platform
Tiledesk is an open-source, no-code platform designed to build AI-powered chatbots and connect them with live agents. It enables businesses to automate conversations, boost customer support, and deploy AI agents across web, WhatsApp, voice, and more. - No-Code Design Studio: Visually design conversation flows without coding. - Knowledge Base Integration: Connect documents, knowledge bases, or external data sources for accurate AI responses. - Multi-Channel Support: Deploy AI agents on web, WhatsApp, voice, and other channels. - Multi-Agent Systems: Create scalable workflows with multiple AI agents and human-in-the-loop support. - MCP & API Integrations: Connect AI agents to business tools and APIs for enhanced functionality. - Real-World Use Cases: Ideal for customer support, lead qualification, internal support, and semantic search. - 14-Day Free Trial: No credit card required, cancel anytime. Tiledesk is open-source and can be self-hosted. The platform is built for enterprise-grade AI solutions, offering scalability and flexibility for real-world applications.
Open source chat server for mobile and web apps
SAMA is a next-generation open source chat server designed for mobile and web applications. It provides a secure, scalable, and easy-to-use messaging solution with built-in end-to-end encryption and clustering capabilities. - Messaging: Rich media messages, status indicators, private/group chats, file attachments, and message history API - User Management: Authorization, profile editing, user search, and block list functionality - Multi-Device Support: Seamless connectivity across multiple devices with online/offline message delivery - Last Activity Tracking: Server-side tracking of online/offline status with subscription API - Push Notifications: APNS, FCM, and web push notifications for offline message delivery - Clustering: Built-in support for large-scale deployments and high user loads SAMA is open source and can be self-hosted. The server is built with modern technologies and supports clustering out of the box. Documentation and API references are available for developers looking to integrate or customize the solution. The project provides both backend (sama-server) and frontend (sama-client) components.
Full-stack Python app platform with AI
Reflex is a full-stack Python framework for building web applications and internal tools with AI integration. Develop, test, and deploy applications entirely in Python, leveraging built-in AI capabilities and seamless cloud deployment. - Full-Stack Python Development: Build complete web apps and internal tools using pure Python without needing separate frontend/backend code. - AI Integration: Embed AI agents, MCP tools, and AI-powered components directly into your applications. - Rapid Prototyping: Iterate quickly with live reloading and a component-based architecture. - Cloud & On-Premises Deployment: Deploy to any cloud provider or host on-premises/VPC for full control. - Pre-Built Integrations: Connect with databases, authentication providers, and third-party services via extensive integration libraries. - Security & Access Control: Built-in authentication, role-based access control, and enterprise-grade security features. - Open Source Core: Core framework is open source with a growing ecosystem of extensions and templates. Reflex is open source (MIT licensed) and can be self-hosted. The platform supports deployment to any cloud provider or on-premises infrastructure. Enterprise features include on-prem/VPC deployment options, advanced security, and dedicated support.
Build your own financial workspace
OpenBB is the workspace where investment teams bring their data, workflows, and AI together under their control. It solves the infrastructure problem of gated data, fragmented tools, and manual workarounds by connecting to any vendor, database, or internal model. - Unified Data Integration: Connect to any vendor, database, internal models, or files without rebuilding integrations. - Customizable Dashboards: Turn analyses into interactive dashboards for teams, analysts, PMs, and AI agents. - AI Agent Collaboration: AI agents work alongside humans using the same governed data, context, and tools. - Open Data Platform (ODP): Open-source foundation for building financial applications. - Workspace Lite: Free tier for small investment teams with core functionality. - App Marketplace: Discover and integrate third-party apps and MCP servers. - Snowflake Native App: Deploy OpenBB directly within Snowflake environments. - Security & Governance: Enterprise-grade controls for data access and workflow distribution. OpenBB is available as a commercial product (OpenBB Workspace) with a free tier (Workspace Lite) and an open-source foundation (Open Data Platform). The platform supports self-hosting for full data control and can be deployed in cloud or on-premises environments. It integrates with existing financial data sources and AI models while maintaining strict data governance.
Generative UI from Markdown for LLMs
MDMA is an open-source generative UI framework that extends Markdown with interactive components in fenced mdma blocks. It enables LLMs to return structured, validated, and renderable UI (forms, tables, approval gates) instead of free-form text or brittle JSON. The framework supports rendering in React, Vue, and React Native, and is designed to work efficiently with small, cost-effective models. - Markdown Extension: Define interactive components using fenced mdma blocks in Markdown. - Structured UI Output: LLMs generate validated, renderable UI components instead of unstructured text. - Multi-Framework Support: Render the same MDMA document in React, Vue 3, or React Native. - Ten Component Types: Includes forms, buttons, tasklists, tables, callouts, approval gates, webhooks, charts, thinking blocks, and custom components. - Validation & Linting: Static analysis with 17 lint rules and auto-fix capabilities. - State Management: Built-in state, bindings, audit logs, and policy enforcement. - Theming: Customizable themes for light, dark, or auto modes, with CSS variable overrides. - Streaming Support: Real-time rendering as the LLM streams responses, with skeleton loading for partial content. - Agent Integration: Stream MDMA documents over AG-UI protocol and route actions back into the agent run. - CLI & MCP Server: Tools for prompt building, validation, and serving specs to LLMs. MDMA is open-source and self-hostable. It consists of multiple small packages for parsing, validation, runtime, and rendering. The framework is designed to run on small, cost-effective models and supports self-hosting for full data control and privacy. The core packages include: - Parser: @mobile-reality/mdma-parser – Remark plugin for Markdown to MDMA AST conversion. - Validator: @mobile-reality/mdma-validator – Static analysis and linting. - Runtime: @mobile-reality/mdma-runtime – State management, bindings, and audit logs. - Renderers: React, Vue 3, and React Native renderers for cross-platform compatibility. - CLI: Tools for prompt building and validation. - MCP Server: Serves specs, prompts, and documentation to LLMs. The framework is built by Mobile Reality and is available under open-source licensing.
About Stream
Stream provides scalable APIs and SDKs for building social networks, apps, and real-time experiences. Powered by a global edge network, it offers chat messaging, video & audio calling, activity feeds, AI moderation, and vision agents for low-latency AI applications.
Key Features of Stream
- Chat Messaging: Real-time in-app chat with features like typing indicators, read receipts, and file sharing.
- Video & Audio: Reliable in-app video calling, livestreaming, and audio solutions.
- Activity Feeds: Enterprise-ready feeds to grow user engagement and retention.
- AI Moderation: Automated content moderation to detect and resolve harmful content.
- Vision Agents: Build real-time, low-latency voice and video AI applications.
- Global Edge Network: Sub-9ms latency with offline support across 6 edge locations.
- Scalability: Built to handle millions of concurrent users with 99.999% uptime SLA.
- Developer Experience: 10+ SDKs, typed APIs, and clear documentation for rapid integration.
- Security & Compliance: SOC 2, GDPR, HIPAA, and ISO 27001 compliant.
Tech / Self-Hosting
Stream is a fully managed cloud service with no self-hosting option. It provides APIs and SDKs for integration into applications, with infrastructure hosted globally for optimal performance. Developers can deploy real-time features without managing backend infrastructure.