sizeless

sizeless is an AI-powered workflow for civil engineering that delivers precise 3D digital twins of open trenches and house connections, directly for GIS and CAD. The company describes its core promise simply: it turns a smartphone video of an open trench into the documentation utilities and contractors are legally required to produce — a 3D model, CAD/BIM plans, and the quantities they bill from. The product is aimed at network operators, civil engineering teams, district heating projects, and pipeline construction work, and it replaces a process that today takes months and a surveyor with one that the company says is completed in hours, from a video the crew films themselves. Underground infrastructure work has a documentation problem that is both expensive and time-sensitive. Once a trench is backfilled, the evidence of what was actually installed — pipe routes, couplings, house entries, third-party utilities crossing the excavation — is gone. Historically, capturing that evidence required waiting for separate surveying appointments before the trench could be closed, which delayed backfill, delayed billing, and delayed cash flow. Where documentation was handled manually, teams relied on manual sketches and created data silos that were hard to audit. Basement areas and other below-grade spaces made matters worse because GPS is not available there, so conventional positioning-based capture methods struggle. sizeless targets exactly these pain points by making documentation a by-product of work the crew already performs on site. The capture side of the workflow centres on SiteScan, the sizeless iPhone app. Field teams use a guided iPhone Pro workflow to capture properties, trenches, and technical rooms in minutes. The company emphasises that this requires no special hardware and no specialist training: the existing project team carries out the capture as part of the job. Because capture happens directly at the excavation, technicians can document house connections independently via smartphone, and trenches are backfilled immediately after the video is taken rather than waiting for a separate surveying appointment. SiteScan is distributed through the App Store, where it is listed as the Sizeless iPhone app. A single smartphone scan produces every deliverable the team already works with, described on the site as "one capture, every output". Those outputs fall into three families: 3D point cloud, 2D CAD, and BIM/GIS. The centimeter-accurate point cloud is a high-resolution 3D reconstruction of the scanned space and serves as the objective basis for earthwork volumes, dimensions, and audit trails. From it, sizeless generates industry-standard 2D CAD as-built plans in DWG and DXF for revision documentation, with the company noting that couplings and pipes are quickly identified and that measurement extraction is simplified. On the 3D side, sizeless produces digital twins of the pipe route including house entries, with seamless integration into GIS systems for future-proof planning and maintenance. Beyond the deliverables themselves, sizeless positions three core benefits for network operators. Quality and audit-proof documentation is provided as continuous 3D evidence that includes third-party utilities and house entries, and that works without GPS in basement areas. This eliminates manual sketches and data silos, and means construction errors can be identified before backfilling rather than after. Process autonomy means technicians document house connections independently via smartphone, so existing internal or external teams can handle a higher project volume through efficient workflows. Accelerated construction and billing follows from immediate backfill after the video: complete documentation is available weeks earlier, described by the company as "72h docs", enabling faster billing and cash flow. The workflow is presented as four steps. Step 01, trench capture, is standardized capture via iPhone Pro directly at the excavation — no special hardware and no extra appointments, carried out by the existing project team. Step 02, 3D point cloud, uses algorithms developed at ETH Zurich to generate a high-resolution 3D point cloud of the open trench, which the company describes as centimeter-accurate. Step 03, 2D CAD as-built plan, produces industry-standard as-built plans in DWG/DXF for revision documentation. Step 04, 3D model and GIS, creates digital twins of the pipe route including house entries and integrates them into GIS systems. The differentiator is therefore spatial AI for underground infrastructure: reconstruction algorithms combined with a capture method that needs nothing more than a phone the crew already carries. For the people doing the work, the outcomes stated on the site are concrete. Trenches can be backfilled immediately because no separate surveying appointment is needed, and complete documentation is available weeks earlier than the traditional route, which supports faster billing and cash flow. Documentation becomes audit-proof and GIS-ready, with continuous 3D evidence replacing manual sketches and disconnected data silos. Errors surfaced in the record can be addressed before backfilling. Because no specialists are required, technicians can work independently and teams can take on higher project volume. The site summarises the outcome as 72h docs, DWG/DXF output, and instant backfill. Several concrete scenarios appear in the material. Trench documentation during civil engineering works: a crew films an open trench with an iPhone Pro and the trench is backfilled immediately afterwards. House connection documentation: technicians document house connections independently via smartphone, including house entries, and those entries are captured in the 3D twin. District heating projects: the workflow is explicitly named for civil engineering, district heating, and house connections. Pipeline construction: automated as-built documentation is described for pipeline construction, where pipes and couplings must be identified for revision documentation. Network operation and maintenance: the resulting digital twins integrate into GIS systems for future-proof planning and maintenance of the pipe network. Property and technical room scanning is also mentioned as something the SiteScan app captures. sizeless is built for network operators and for the civil engineering, district heating, and pipeline construction teams that build and maintain underground infrastructure. The company states that it was founded by engineers from ETH Zurich and UC Berkeley and that it is backed by Y Combinator, ETH Zurich, UC Berkeley, Cambridge, and MIT. Integration points named in the content are GIS systems, CAD and BIM workflows, and industry-standard DWG/DXF file formats, alongside the SiteScan iOS app. The site's primary calls to action are booking a demo, seeing it in action, and requesting an in-person demo with a full name, email address, company name, and preferred demo date. Taken together, sizeless reframes as-built documentation as something a construction crew produces as it works rather than something a surveyor delivers afterwards. The combination of a guided iPhone Pro capture workflow, ETH Zurich-developed reconstruction algorithms, and outputs that drop into existing CAD, BIM, and GIS tools means the trench can be closed immediately, the documentation arrives in hours instead of months, and the resulting record is a continuous, audit-proof 3D twin that supports both billing today and planning tomorrow.