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Semble AI

Autonomous building-system design for construction companies.

Semble AI builds AI agents that design building-systems (fire, HVAC, plumbing, security). Construction companies use Semble to cut down weeks on commercial and residential projects. The $600B building-system integration industry still runs on spreadsheets and manual drawings, even as building codes rapidly evolve and become more localized. It’s a massive blind spot for the tech world. Jonathan and Ethan met studying computer science at Stanford. Jonathan worked at Convergint, one of the world's largest building system integrators, specifically for the purpose of learning how this industry works. Ethan is obsessed for a different reason: His house burned down in 2017 due to a faulty fire system. They are determined to make Semble the industry standard for construction design.
Active Founders
Jonathan Tyshler
Jonathan Tyshler
Founder
Co-founder and CEO of Semble AI; previously economics and computer science at Stanford.
Ethan Boyers
Ethan Boyers
Founder
Co-founder and CTO at Semble AI; previously, math and computer science at Stanford.
Company Launches
Semble AI: Automate Building-System Design
See original launch post

Semble AI automates building-system design for construction companies.

https://www.youtube.com/watch?v=F-0XdMA9azY

It used to take billions of dollars and thousands of hours of manual drafting, building code lookups, and back-and-forth with permitting authorities. With Semble AI, it takes 5 minutes.

Instantly generate code-compliant device layouts, bills of materials, project cost estimates, and proposals. No spreadsheets, no painstaking pdf editing, no hidden costs. Just ready-to-submit design specs.

🔥 Semble AI is the new standard for building-system design. 🔥

Our Story:

Jonathan worked at Convergint - one of the nation’s largest fire and security-system designers - where he experienced how slow this process is firsthand.

Ethan’s house burned down in 2017. Since then he’s been obsessed with this industry, working at numerous fire-tech companies.

Before Semble AI, they both studied computer science at Stanford.

Asks:

1. If you know anyone in the construction or system integrator space, we would love a warm intro. Email us: founders@sembleai.com.

2. Follow our Semble AI (YC F25) LinkedIn page (https://www.linkedin.com/company/sembleai).

Jobs at Semble AI
San Francisco, CA, US
$150K - $250K
0.80% - 1.40%
1+ years
Semble AI
Founded:2025
Batch:Fall 2025
Team Size:2
Status:
Active
Location:San Francisco
Primary Partner:Harj Taggar