Zaz OS YC Application

Summer 2021Active

Zaz OS went through Y Combinator in the Summer 2021 batch as a B2B company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.

YC batch: Summer 2021
Industry: B2B
Team size: 9
Status: Active
Launched: 2021

Founders

Murilo NarcisoFounder

What Zaz OS does

Zaz OS is a “Lovable for internal products”: an AI-native platform with an opinionated infrastructure that makes it easy to build and edit Apps and Agents through vibe-coding. Using spec-driven development, it ensures consistency and security for critical processes, solving challenges like user management, notifications, and multi-app integration within a single interface. With over eight years of experience in back-office and HR, Zaz OS was designed from the ground up with core structural issues already solved and the flexibility to adapt to each company’s unique needs. The result is the speed to build and iterate, combined with the robustness required for mission-critical processes - the ultimate solution to replace the Frankenstein stack of SaaS tools that currently dominates company management. As companies grow, the lack of customization of current software forces Heads of HR to buy multiple disconnected tools, allocate engineers to build and maintain people-related projects or use spreadsheets.

Zaz OS's YC application, reconstructed

Y Combinator application

Zaz OS, Summer 2021 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Zaz OS

Describe what your company does in 50 characters or less.

Lovable internal product platform

What is your company going to make? Please describe your product and what it does or will do.

We built an AI-native platform that lets companies build and manage internal apps and AI agents with speed and security. Our approach uses vibe-coding and spec-driven development to handle user management, notifications, and multi-app integration in one interface. This lets teams replace multiple disconnected SaaS tools and spreadsheets, especially in HR and back-office where customization is critical and existing products fall short.

Where do you live now, and where would the company be based after YC?

We live in São Paulo, Brazil, and the company is based here. After YC, we would remain based here.

Explain your decision regarding location.

São Paulo is where we have deep roots in HR and back-office domain experience, and it's where our early users and team are. We want to stay close to our base to iterate fast and lead from here.

21 more answers in the full application

Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.

See full application

Frequently Asked Questions

Is this the real Zaz OS YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Zaz OS's public data (launch notes, founder backgrounds, product description). It shows how a company like Zaz OS would present itself to YC, not the text they submitted.