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Launch HN: Vendo (YC S26) – Let users build features on top of your product

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Why This Matters

Vendo introduces an open-source customization layer that enables users to build and embed their own features directly on top of existing SaaS products without altering source code. This approach empowers B2B SaaS providers to offer highly tailored experiences, fostering greater customer satisfaction and flexibility. Its easy installation and integration streamline the process, making customization accessible and scalable for tech teams and consumers alike.

Key Takeaways

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.

See it in action

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.

Install in 60 seconds

npm install @vendoai/vendo npx vendo init

Or install with your coding agent

Paste this inside your app's repo:

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