Concrete is the world's second most consumed substance after water, and its skeleton is steel rebar. For all the digital blueprints and 3D printed forms, the process of bending, tying, and assembling those steel cages remains a stubbornly manual, labor-intensive, and often hazardous job. MESH AG, a Swiss robotics startup spun out of ETH Zurich, thinks the answer is not a better blueprint, but a robot that can read one.
Founded in 2022 by researchers Ammar Mirjan and Mattis Koh, MESH is building a software and robotics system designed to automate rebar fabrication. The company closed a $3.8 million seed round in 2024, led by ABB Robotics Ventures and construction chemicals giant Sika [StartupTicker.ch, 2024]. Their bet is that by bridging the digital model directly to a robotic workcell, they can address chronic labor shortages, improve worksite safety, and cut down on the material waste endemic to traditional rebar work.
From academic lab to industrial tunnel
The company's roots are deep in the digital fabrication research led by Gramazio Kohler Research at ETH Zurich. CEO Ammar Mirjan completed a PhD on drone fabrication of tensile structures in 2016 and spent years as a postdoc exploring robotic construction [dfab.ch, 2026]. This isn't a theoretical exercise. The technology has been in development with industry partners PERI and Sika since 2019, and MESH reports its first robots are already in use by reinforcement manufacturers in Switzerland, where the technology is rented out [ethz.ch, 2026]. More notably, the system has been deployed on major infrastructure projects, including the Gotthard Road Tunnel [sika.com, 2026]. For a seed-stage hardware company, that's a significant signal of industrial validation.
The software wedge into a physical world
MESH's approach is a classic hardware-enabled software wedge. Their production planning software is meant to be the intuitive layer that takes a digital design and translates it into commands for industrial robots. The physical applications they list are specific and repetitive: robotic machine tending for stirrup bending machines, multi-robot assembly of rebar cages, and automated tying [mesh.ch, 2024]. The promise is a scalable fabrication process that moves the complex, precision work off the chaotic construction site and into a controlled, factory-like environment. This isn't about replacing every ironworker, but about automating the production of standardized, complex cage geometries that are slow, error-prone, and expensive to build by hand.
The backing from ABB Robotics Ventures and Sika is as much a product validation as a financial one. These are not generalist venture funds but strategic players with deep channels into global construction and manufacturing.
- ABB's stake. ABB, a global leader in industrial robotics, provides not just capital but presumably a preferred path to its robotic arms and control systems.
- Sika's channel. Sika's products are used on construction sites worldwide, giving MESH a potential route to market through an established sales and technical service network [Sika, 2026].
- PERI's formwork. Partner PERI is a leader in concrete formwork, creating a natural synergy where digital designs for formwork and reinforcement can be aligned [PERI, 2026].
The unit economics of manual labor
The counter-bet here is that the construction industry, famously resistant to change, will not adopt a complex, capital-intensive robotic system quickly enough. The sales motion is long, the margins in construction are often thin, and the upfront cost of robotic cells is high. MESH's rental model for manufacturers is a clever attempt to lower that adoption barrier, but it still requires a customer to rethink their entire workflow.
The most compelling case for MESH may lie in the math of manual labor and material waste. A back-of-the-envelope calculation: if a robotic cell can produce the rebar cage for a complex bridge pier in half the time with two-thirds of the material, the savings on skilled labor wages and steel, a major carbon emitter, start to cover the capex. The real climate impact isn't from the robot's electricity use, but from the tons of steel not wasted in over-engineering and cutting errors.
MESH's success hinges on beating the incumbent, which isn't another robot company, but the entrenched practice of manual rebar fabrication. It must prove that its total cost of ownership, factoring in labor savings, safety, precision, and material yield, outcompetes a foreman, a crew, and a pile of steel. If they can, they won't just be selling robots. They'll be selling a more predictable, less wasteful, and ultimately cheaper way to build the bones of our world.
Sources
- [StartupTicker.ch, 2024] MESH secures US$3.8 million seed round | https://www.startupticker.ch/en/news/mesh-secures-us-3-8-million-seed-round-to-automate-rebar-construction-globally
- [dfab.ch, 2026] MESH AG: 3D Geometries for All | https://dfab.ch/news/3d-geometries-for-all
- [ethz.ch, 2026] Source referenced in raw research | Not directly linked in snippets
- [sika.com, 2026] Sika advances digitalization in construction sector with a strategic stake in MESH | https://www.sika.com/en/media/media-releases/2026/sika-advances-digitalization-with-strategic-stake-in-mesh.html
- [mesh.ch, 2024] MESH AG Technology Page | https://www.mesh.ch/technology
- [PERI, 2026] New technology for demanding concrete structures | https://www.peri.com/en/company/press-releases/mesh-mould-new-technology-for-demanding-concrete-structures.html