CarSignal YC Application

Summer 2026Active

San Francisco

CarSignal went through Y Combinator in the Summer 2026 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 2026
Industry: B2B
Location: San Francisco
Team size: 2
Status: Active
Launched: 2026

Founders

Michael MuzzinFounder/CEO
Junaid PopalzaiFounder/CTO

What CarSignal does

CarSignal is the AI-native operating system for independent auto repair shops. Most shops still run each repair across disconnected management software, scan tools, parts catalogs, service information, texts, spreadsheets, and knowledge kept in technicians’ heads. That fragmentation slows diagnosis, creates duplicate processes, and leaves customers waiting. CarSignal connects the full repair process in one system. AI agents research vehicle-specific failure patterns and surface the tests that confirm or rule out each cause. The same system carries each job from booking and intake through inspections, estimates, parts, approvals, payment, and follow-up, so technicians spend less time searching and updating systems and more time fixing cars.

CarSignal's YC application, reconstructed

Y Combinator application

CarSignal, Summer 2026 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

CarSignal

Describe what your company does in 50 characters or less.

The AI Operating System for Auto Shops.

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

We're building CarSignal, the AI-native OS for independent auto repair shops. CarSignal connects every part of the repair process in one platform: booking, intake, diagnostics, parts, estimates, approvals, payment, and follow-up all live together. The core is our AI that researches vehicle problems and surfaces the right tests for each case, so techs diagnose issues faster and don't jump between tools, spreadsheets, and memory.

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

We live in San Francisco, CA. The company would be based here after YC.

Explain your decision regarding location.

San Francisco is the best place to build a deeply technical B2B SaaS company - access to talent, AI community, and early-adopter customers.

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 CarSignal YC application?

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