All3 is a London-based construction technology company building an integrated stack to triple construction productivity. It combines an AI architecture platform that translates a brief or site address into a fully compliant building design, robotized off-site factories, and Mantis, an autonomous legged robot designed for on-site assembly. The company says its system can reduce project costs by up to 30%, shorten delivery timelines by up to 50%, and cut embodied carbon by up to 25%. Mantis is operational, customers are signed, and first commercial deployments are slated for active sites in Germany. Founded by the team behind rapid-grocery unicorn Samokat, All3 raised a $25M seed round in April 2026 led by RTP Global, with participation from SuperSeed, Begin Capital, s16vc, and VNV Global.
All3
ActiveAI architecture and construction robotics to triple building productivity
Total raised
$25M
1 round
Stage
Seed
Apr 2026
Team
11-50
since 2024
Pricing
Freemium
free plan
Founded
2024
London, United Kingdom
Agent-ready
—
AI architecture design platform
Brief-to-building automated design
Robotized off-site factories
Mantis autonomous legged assembly robot
Code-compliant building generation
Embodied carbon reduction
End-to-end design-to-build stack
On-site robotic assembly
10/100
Early
MCP server
Public API
Webhooks
OAuth 2.0
SDKs
No public agent surfaces detected yet.
Apr 2026 Seed $25M incl. Begin Capital +3
Capital network
$25M raised ·4 backers·7 network links
- Backers4
- Shared portfoliocompanies these backers also fund
- Extended networkfunds that co-invest alongside them
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- What does All3 do?
- All3 combines an AI architecture platform, robotized factories, and an autonomous assembly robot to automate construction end to end.
- What is Mantis?
- Mantis is All3's autonomous legged robot designed for on-site building assembly.
- How much has All3 raised?
- All3 raised a $25M seed round in April 2026 led by RTP Global.
- Where will All3 deploy first?
- Its first commercial deployments are planned for active construction sites in Germany.
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