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sizeless vs SubVysion

Two Y Combinator-backed underground utility data companies working at different moments: SubVysion (YC Summer 2026) maps buried utilities with ground-penetrating radar before you dig and shows them in a phone AR app; sizeless (YC Summer 2023) turns a smartphone video of an open trench into a point cloud and CAD as-built before backfill. Both are quote-only. Pages read Oct 18, 2026; desk research, not tested, no winner.

DESK RESEARCH, NOT TESTED. Compiled from vendors' public websites (accessed Oct 18, 2026). Vendor claims are not verified by Means & Methods Lab. No scores or rankings.

In short: sizeless (Smartphone-video as-built documentation of trenches and house connections; no public prices (quote / sales)) vs SubVysion (3D underground utility maps from GPR with a mobile AR viewer; no public prices (quote / sales)). Facts last checked Oct 18, 2026. No winner declared; not tested.

Side by side

sizeless vs SubVysion: vendor-published facts side by side
Sheet rowsizelessSubVysion
CategorySmartphone-video as-built documentation of trenches and house connections3D underground utility maps from GPR with a mobile AR viewer
AI role (our label)AI-firstAI-first
What it doesTurns a short smartphone video of an open trench or house connection into a 3D point cloud, a 2D CAD as-built plan (DWG, DXF, PDF) and BIM/GIS-ready exports (IFC, RVT), so crews can backfill without waiting for a separate survey. The site and FAQ (read Oct 18, 2026) say capture uses an iPhone Pro or iPad Pro with its SiteScan app (Android is on the roadmap) and list AI-based use cases including automatic detection of pipes and utilities, material detection and condition assessment. Data is processed and stored in Germany and Switzerland, customer data is not used to train AI models, and SOC 2 and ISO 27001 work is described as in progress (vendor statements). Accuracy (sub-centimeter in practice per the FAQ) and turnaround figures are vendor claims, not verified. Y Combinator batch: Summer 2023 (YC company profile).Maps underground utilities in 3D so contractors can see what is below before they dig. The site (read Oct 18, 2026) describes multi-sensor ground-penetrating radar (GPR) and 3D surface mapping, alignment of GPR data with 3D surface data, quality control and validation, and delivery as georeferenced maps that crews view on site through a mobile augmented-reality app; it calls itself a software company building AI-powered augmented-reality maps of underground infrastructure. Its YC profile describes autonomous rovers and centimeter-accurate 3D maps of underground utilities (vendor claim, not verified). Y Combinator batch: Summer 2026 (YC company profile).
Who it's forNetwork operators, civil engineering and pipeline contractors and utilities that document trenches and house connections (district heating, water, gas, fiber), plus energy planners on the building side.Utility contractors, general and site contractors, utility locators, civil engineers, design firms, utility companies and insurers (the site's list).
Pricing (as publicly stated)No public prices (checked Oct 18, 2026): the FAQ says pricing depends on project scope, data volume and deliverables, with an individual offer on request, and sizeless.co/en/pricing returns a not-found page. Confirm with sizeless.No public prices found (checked Oct 18, 2026): subvysion.com/pricing returns a not-found page and the call to action is "Book a demo". Confirm with SubVysion.
Test statusNot tested. No scores.Not tested. No scores.
Vendor links
Sources

Facts last checked: Oct 18, 2026. Prices change; check the vendor page before relying on them.

Where the vendor descriptions differ

  • When: SubVysion works before excavation, locating what is already buried. sizeless works while the trench or house connection is open, documenting what was installed or exposed so crews can backfill without waiting for a separate survey (vendor statement).
  • Capture: SubVysion describes multi-sensor ground-penetrating radar (GPR) aligned with 3D surface mapping; its YC profile mentions autonomous rovers. sizeless says capture uses an iPhone Pro or iPad Pro with its SiteScan app; Android is on its roadmap.
  • Output: SubVysion delivers georeferenced maps that crews view on site through a mobile augmented-reality app. sizeless delivers a 3D point cloud, a 2D CAD as-built plan (DWG, DXF, PDF) and BIM/GIS-ready exports (IFC, RVT).
  • AI: SubVysion calls itself a software company building AI-powered augmented-reality maps of underground infrastructure. sizeless lists AI-based use cases including automatic detection of pipes and utilities, material detection and condition assessment.
  • Data handling: sizeless says data is processed and stored in Germany and Switzerland and customer data is not used to train AI models (vendor statements). We did not record a data-handling statement for SubVysion.
  • Pricing: neither publishes prices; both /pricing pages returned not-found (Oct 18, 2026). SubVysion routes to a demo booking; sizeless's FAQ says pricing depends on project scope, data volume and deliverables.
  • Claims: SubVysion's YC profile describes centimeter-accurate maps and sizeless's FAQ cites sub-centimeter accuracy in practice; both are vendor claims, not verified. Neither has been tested by Means & Methods Lab.

Paraphrased from the sources listed above. Vendor claims are reported as claims.

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