News & insights

All3 unveils next generation All3 Mantis - the heavy-duty quadrupedal robot setting new benchmarks for construction automation

07 Oct 2026, by All3

All3 has unveiled the second generation of All3 Mantis, its four-legged, electrically driven robot designed for construction work.

The updated All3 Mantis sets new benchmarks for autonomous robotics: it is designed to carry payloads of up to 100kg while walking; it climbs stairs with its 45kg working arm attached; it locates and drives structural screws into building components with no operator in the loop.

At 135kg, All3 Mantis is the heaviest electric-drive quadruped documented climbing stairs. Quadrupedal robots in its weight class have until now relied on hydraulics or combustion engines: Boston Dynamics' BigDog and LS3, both since retired, and IIT's hydraulic HyQReal. All3 Mantis is the first to return to that 100-150kg class on electric drive.

All3 Mantis was designed from the requirements of a real building site rather than adapted from an existing robot. Its width is set by a standard doorway and its mass by the 100kg it must carry up a staircase. That mass also lets it absorb the reaction of every tool it pushes into the building.

"Every newton you push into a building comes straight back into the robot. Light robots balance against it. All3 Mantis absorbs it," said Napo Montano, Head of Mobile Robotics at All3. "We did not add weight to All3 Mantis. We calculated how much the job needs and built to that."

All3 Mantis: built for the site as it is

Building sites were never designed around machines, or even around the human body. Every dimension of All3 Mantis answers one of their constraints:

Heavy-duty performance: All3 Mantis is designed to carry up to 100kg while walking. It is able to perform active structural tasks, applying around 900 newtons of thrust when driving an 80-120mm screw.
Stairs and interiors: A rotating yaw hip gives All3 Mantis two stances, wide for working and narrow to pass through a standard 900mm doorway. It climbs staircases of up to 35° autonomously, using onboard sensing only.
One platform, interchangeable payloads and tools: Two mechanical interfaces carry power, data and safety signals to payload modules and tools. A six-axis arm with a reach of around 1.8m currently carries a screw tool or a vacuum gripper.
Autonomous precision: In repeated runs, All3 Mantis found, aligned to and drove screws into eight of eight pilot holes, closing to 0.5mm at the tool tip. It is designed against a catalogue of 68 construction operations, which will expand over time, from placing columns to laying underfloor heating.
Continuous operation: Two hot-swappable battery packs remove any limit on operating time. The motors draw 210W standing with 162kg on board, and 400W when walking - about an eighth of the power used by a kettle.
Site logistics: All3 Mantis fits a Europallet and ships crated, like building material.

Safety by design

All3 controls Mantis on a physics-first basis. Machine learning is used where it measurably improves performance, in walking, planning and perception. Learned components are architecturally separated from the motors. Below that line, a deterministic loop running 1,000 times a second governs force, damping and emergency stops.

That approach was tested for real during development. All3 Mantis lost battery power at the top of a flight of stairs and lowered itself to the ground under control. All3 Mantis is built to a safety standard ahead of the EU Machinery Regulation, which applies from 20-01-2027. Its safety assessment is in progress.

Part of an integrated approach

All3 Mantis has been designed to work within All3's integrated construction process. RTA (Real Time Architecture), All3's AI-powered design platform, produces building models ready for robotic assembly. The Cellular Factory manufactures components designed for All3 Mantis to install. On site, All3 Mantis completes the process.

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"Fifty years ago, a car cost around six months' household income and a home around three years'. The car still costs six months. A home now costs five or six years," said Rodion Shishkov, co-founder and CEO of All3. "The difference is productivity. Car-making became an industrial process and house-building never did. Changing that means owning every step, from design to finished building, and All3 Mantis is the step that happens on site."

What comes next

The next milestone is deployment of Mantis on All3's first live construction project in early 2027. A funded twelve-month fleet programme is developing multi-robot cooperation, autonomous battery swapping and verification of completed work against the building model. A telescopic arm designed to reach 4m is in development.

All3's robotics team in Wembley, London, is hiring engineers to work on physics-first control of heavy legged machines, navigation in semi-structured environments and tools for construction.

Watch the video to see it in action.

Notes to editors:

About All3

All3 is a technology company developing a heavy-duty robotic platform for one of the largest and least-digitised sectors in the world - construction.

All3 has built a single end-to-end process from three integrated technologies. Its AI-powered design platform generates a fully coordinated building model in days rather than months. That model drives fabrication: robotic production in an All3 factory turns each building's unique design into custom timber components, made without the usual custom-build premium and to the precision the assembly stage requires. All3 Mantis robots will soon assemble those components on site, faster than manual construction allows.

The integrated model is engineered to deliver cost savings of up to 10%, timeline reductions of up to 50%, and up to 25% less embodied carbon compared with traditional construction methods - without limits on form, function or appearance.

About the next generation All3 Mantis

Platform mass: 135kg, excluding arm
Payload: designed to carry up to 100kg while walking
Locomotion: four legs, 13 joints, electric drive, two stances
Standing width: 750mm in narrow stance
Arm: six-axis, around 1.8m reach
Tools: screw tool, vacuum gripper, magazine screw tool; interchangeable via a single connector
Power: two hot-swappable battery packs; motors draw under 210W standing
Control: physics-first, with learned components separated from the motors
Development: three generations in 28 months

On the figures: All figures come from All3's own testing and are stated with their conditions. The fastening result is a repeated demonstration outcome, not a reliability statistic. The 68-operation figure describes the operations All3 Mantis is designed to perform, and will expand over time.

For more information contact: press@all3.com

Next generation All3 Mantis up close

07 Oct 2026, by All3

Video: The next-generation All3 Mantis up close, a 135kg fully electric robot that climbs stairs and drives structural screws autonomously.

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