Vendo: open-source layer lets users build features on top of your product

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

Vendo, an open-source customization layer from YC-backed startup runvendo, lets B2B SaaS customers build their own features and micro-apps on top of a product. It embeds an agent that acts through the product's own API as the signed-in user, generating UI in a sandboxed, brand-native surface without touching the source code. Installable in 60 seconds via npm, it supports views, UI remixing, and cross-tool automations.