AlI3 raises $25M to Automate Construction With Legged Robots and Al Design Software

All3 raises $25m to automate construction with legged robots and AI design software. The London-founded startup wants to replace the entire construction value chain, from architect’s brief to move-in-ready building, using AI and a on-site robot called the Mantis. The round is led by RTP Global, the early-stage firm whose portfolio includes Datadog, Delivery Hero, and SumUp, with participation from SuperSeed and additional investment from Begin Capital, s16vc – Founders for Founders Fund, and VNV Global AB.

Founded by Rodion Shishkov, All3 operates across Europe with offices in Berlin and Zug and R&D facilities in London and Belgrade. It emerged from stealth in mid-2025, at which point it had already begun testing its robotic system in Belgrade.

The company’s system has three integrated components. First, an AI-powered design platform that translates a brief or site address into a fully compliant building design, optimising for space, local planning regulations, and robotic production constraints. Second, robotic factories, described by All3 as compact, modular production cells, that fabricate custom timber composite components with claimed 0.2mm precision, without the need for programmer intervention. Third, the All3 Mantis: an autonomous legged robot with a 100kg payload and 4-metre reach, built for on-site assembly, covering placement, fastening, finishing, and inspection.

The funding will go primarily towards advancing R&D in London and Belgrade and deploying the robot fleet across All3’s first commercial projects in Germany, the company’s initial launch market. A first building is due to break ground there later in 2026.

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