Semble AI provides AI workflow automation for the construction back-office. The company builds AI agents that design building systems such as fire, HVAC, plumbing and security, and integrates them into existing tools, replacing weeks of manual design work with instant, code-compliant system layouts and bills of materials. Its agents are trained on business operations with the goal of becoming the industry standard for construction's back-office. Semble AI is based in San Francisco and is part of Y Combinator's Fall 2025 batch.
Semble AI
ActiveAI workflow automation for construction back-office
Total raised
$500K
1 round
Stage
Seed
Jan 2025
Team
1-10
since 2025
Pricing
—
Founded
2025
San Francisco, United States
Agent-ready
—
AI agents that design building systems including fire, HVAC, plumbing, and security
Code-compliant system layouts generated automatically
Automated bills of materials for designed systems
Replaces weeks of manual design with near-instant output
Integration into existing construction back-office tools
Agents trained on construction business operations and workflows
Workflow automation across the construction back office
Built to standardize repetitive engineering and design tasks
12/100
Early
MCP server
Public API
Webhooks
OAuth 2.0
SDKs
No public agent surfaces detected yet.
Jan 2025 Seed $500K ● Y Combinator
Capital network
$500K raised ·1 backer·10 network links
- Backers1
- Shared portfoliocompanies these backers also fund
- Extended networkfunds that co-invest alongside them
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- What does Semble AI do?
- Semble AI provides AI workflow automation for the construction back office, using agents that design building systems such as fire, HVAC, plumbing, and security and generate code-compliant layouts and bills of materials.
- How does it save time?
- It replaces weeks of manual design work with near-instant, code-compliant system layouts, and also produces the associated bills of materials.
- Does it integrate with existing tools?
- Yes. Semble AI integrates its agents into the tools construction teams already use in their back-office operations.
- Who is behind Semble AI?
- Semble AI is based in San Francisco and is part of Y Combinator's Fall 2025 batch.
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