Heroes Wear Masks
Jovo is an open source framework for building voice and chat apps for Alexa, Google Assistant, and the web.
About Heroes Wear Masks
Jovo is an open-source framework for building voice and chat apps for Amazon Alexa, Google Assistant, Messenger, Samsung Bixby, and web/mobile interfaces from a single TypeScript codebase; JavaScript can also be used. It uses a component-based handler API, a CLI for scaffolding and local runs, pluggable NLU and CMS integrations, and a local debugger for simulating requests and inspecting sessions.
Source code, issue tracking, and documentation are hosted on GitHub, with community help via Slack and a forum. The site also publishes developer-written reviews and guides about voice AI frameworks, NLU APIs, and conversational AI concepts.
Key features
- Build Alexa, Google Assistant, Messenger and web apps from one codebase
- Component-based handlers with platform-specific payload translation
- CLI scaffolds projects and runs local dev server on port 3000
- Pluggable NLU options including Dialogflow, Rasa, Lex and Snips
- CMS integrations for Sanity, Storyblok and Google Sheets
- Local debugger to simulate requests and inspect session flow states
Best for: Developers who want to build and maintain cross-platform voice and chat apps in code.
Good for
- Core framework licensed under Apache 2.0 for personal and commercial projects
- Single codebase covers Alexa, Google Assistant, Messenger, Bixby, and web
- Extensible with plugins and middleware and supports external NLU and CMS tools
Heroes Wear Masks at a glance
- Website
- jovo.tech
- Category
- Development › Developer Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Developer Tools
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Heroes Wear Masks FAQ
Is the Jovo Framework really free?
Yes, the core framework is open source under the Apache 2.0 license and can be used for personal and commercial projects.
Do I need to know TypeScript to use Jovo?
No. Version 4 is written in TypeScript, but apps can be written in JavaScript, though TypeScript is recommended for production.
How does Jovo compare to Voiceflow?
Voiceflow is a visual design tool, while Jovo is a code-first framework for backend logic and integrations.
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