Vendo is an open-source customization layer in your product that lets every customer add the features and micro-apps they need, just by describing what they want. Until now software has been rigid, and every customer had to adapt to it. Vendo makes it dynamic, so your product shapes itself around each customer, built on your own API and inside the guardrails you set.
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Vendo is an open-source customization layer that embeds directly into your product, letting every customer build the features and micro-apps they need by simply describing what they want. Instead of forcing users to adapt to rigid software, Vendo makes your product dynamic—it shapes itself around each customer, built on your own API and confined to the guardrails you define. Backed by Y Combinator and available under the Apache-2.0 license, Vendo turns your application into a platform where the interface literally builds itself in real time.
Customers describe what they need, and Vendo assembles it live—not as throwaway generated UI, but as real micro-apps with actions, automations, and state that users keep. There's no ticket, no roadmap, no waiting. The interface builds itself around each user's workflow.
One command reads your repository and learns everything: your components, colors, API as callable tools, and permission rules. What Vendo builds wears your brand, runs sandboxed as the signed-in customer, and never steps outside the permissions they already have. It learns your product and never exceeds it.
Vendo delivers a single app that works everywhere your customer already is. Whether they're on desktop, mobile, or embedded in another tool, the customization layer follows them—no separate login, no context switching.
The single-player agent is complete and open source, with the LLM judge and metering included. Cloud is everything multiplayer. You can embed Vendo in an afternoon with two commands—it reads your app, learns your theme, and shows you every change before writing a line, then checks its own work.
"Ship the product that reshapes itself."
Vendo's edge is that it doesn't just generate UI—it creates persistent, stateful micro-apps that respect your existing permission model and brand identity. The agent learns your entire codebase, including your API and design system, and operates strictly within those boundaries. That combination of power and safety is rare: customers get real customization, while you retain full governance from the first render. The open-source core with a clear path to multiplayer cloud features makes it practical for both indie hackers and enterprise teams.
You're tired of building one-off features for individual customers and want to hand them the keys—safely. Vendo is worth exploring if you have a well-documented API, care about brand consistency, and want to offer deep personalization without sacrificing security. It's especially compelling if you're already on a modern stack and can embed it in an afternoon, or if you need air-gapped self-hosting for strict compliance environments. The free tier includes $5 of monthly usage, so you can test the full experience before committing.
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