Launch HN: Vendo (YC S26) – Let users build features on top of your product
Vendo is a new open-source tool designed for B2B SaaS teams to allow their users to build custom features and micro-apps directly on top of their existing products. The tool acts as an embedded agent that interacts with the product's API to render UI components without requiring changes to the host's source code.
Why it matters
This represents a shift toward 'composable' software, enabling end-users to customize enterprise tools to their specific needs without developer intervention.
An open-source customization layer. Your users build their own features and micro-apps, right on top of your product.
Vendo is for B2B SaaS teams whose customers keep asking for bespoke features. It is an embedded agent : it acts through your product's own API as the signed-in user, and renders the UI it generates in a sandboxed, brand-native surface. Your source code is never touched. Learn more at vendo.run , or read the docs at docs.vendo.run .
Every capture below is a real agent run in a demo host app, not a mockup.
Build views. Ask a question, get a live view composed from the host's own components and API.
Remix the UI. Hover a component, describe the change, apply it in place.
Automate across tools. Plain language in, standing automation out, every tool gated by approval.
npm install @vendoai/vendo npx vendo init Or install with your coding agent
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