Snag AI vs PlanRadar: Which Fits Your Snagging?

Snag.ai suits site engineers, clerks of works and independent snaggers who want to photograph a defect and get a tagged, described, client-ready report without typing or setting up software. PlanRadar suits larger contractors and developers who need defects pinned to drawings or BIM models alongside site diaries, inspections and handovers across multiple projects. If you are choosing a PlanRadar alternative because your snagging work is smaller in scale, Snag.ai is worth a look. If you are running a multi-trade site with hundreds of tickets, PlanRadar's broader toolkit may still be the better fit.

Snag.ai vs PlanRadar at a glance

	Snag.ai	PlanRadar
Best for	Site engineers, MEP engineers, PMs, clerks of works, QS and independent snaggers who want fast, described snags	Larger contractors, developers and facility managers running multi-trade projects with drawings or BIM models
How a snag is logged	Photograph the defect. The app logs it, writes a professional description and tags trade, location and severity, and can find other snags in the same photo	Raise a ticket and pin it to a location on a digital plan or BIM model, then fill in customisable form fields
Report output	Formatted, client-ready Word report generated automatically	Customisable PDF ticket reports, generated from a filtered list of open, in-progress or resolved defects
Offline use	Works offline on site; snags upload when signal returns	Mobile app works offline, with results syncing once you are back in signal
Set-up effort	Open the app and start snagging, no plans or templates to upload first	Plans or BIM models need uploading, and forms, user groups and subcontractor access are usually configured before site use

Snag.ai

Snag.ai is built around the photograph. Point your phone at a defect and the app logs it, writes a professional description, and tags the trade, location and severity automatically. It can also spot other snags in the same shot, which speeds up walking a flat or a block where several small issues sit close together.

Reports come out as formatted Word documents ready to send to a client or contractor, with no reformatting needed afterwards. The app works offline on site, a common need given how patchy signal is in basements, plant rooms and new-build shells, with snags uploading once you are back in range.

There is an iPhone app and a web app. It is free to start with unlimited manual snags, and Pro is £19.99 a month with a 14-day free trial.

Good for:

• Independent snaggers and site engineers who want to log defects in seconds without typing a description for each one
• Clerks of works and QS who need a client-ready report straight after a walkaround, without reformatting
• Smaller developers and snagging businesses who want to start free and scale to Pro only when the job needs more than manual snagging
• Anyone working in poor-signal areas who needs reliable offline capture

Less suited to:

• Large contractors who need defects pinned directly onto BIM models or multi-storey drawing sets
• Teams that also want site diaries, RFIs, health and safety audits and facility management in the same platform
• Projects with many subcontractor groups needing role-based ticket assignment across hundreds of users

PlanRadar

PlanRadar is a broader construction and real estate platform where snagging is one module among several, alongside inspections, checklists and safety audits, site diary, quality assurance, health and safety surveys, project management and fire safety compliance. For snagging specifically, PlanRadar gives you instant issue creation pinned directly on digital drawings or BIM models, so every snag has an exact location, an intuitive mobile app that works offline, with results syncing once you are back in signal, fully customisable forms and workflows, and reports generated and shared in seconds.

A typical PlanRadar defect workflow runs in four stages: the office sets up the defect form, trade lists, severity levels and subcontractor access; site staff record defects against the plan; subcontractors fix issues and submit proof; and the office checks, closes and issues the final lists. PlanRadar's own guidance for this uses a worked example of twelve apartments, six trades, one defect form and one plan per floor. For a general contractor managing that scale, the structure pays off. For a single engineer snagging one house, it is more setup than the job needs.

On pricing, PlanRadar's own UK pricing page lists a Basic plan at £23 a month for one user with unlimited subcontractors and watchers and 10 digital plans, a Starter plan at £80 a month, and a Pro plan at £119 a month with BIM model support, QR codes and NFC tags, and a custom template builder. It is a per-user model, so costs rise as more people on your team need licences.

Good for:

• General contractors and developers running several trades across one or more sites who need tickets pinned to drawings or BIM models
• Teams that want site diaries, handovers and compliance documentation in the same system as snagging
• Facility managers who need defect tracking to continue after handover, into ongoing maintenance
• Organisations with the admin time to set up plans, forms and subcontractor groups properly before going live

Less suited to:

• An independent snagger or single site engineer who wants to start logging the same day, without uploading plans first
• Small teams where per-user licence costs add up faster than the scale of the job justifies
• Anyone who wants an AI to write the defect description and tag the trade and severity automatically, rather than filling in a form

Which one should you pick?

If your main job is walking properties, photographing defects and handing over a clean report, Snag.ai does that with less setup and no per-plan licensing to think about. If you are coordinating six subcontractors across twelve apartments and need every ticket pinned to a specific point on a floor plan, with site diaries and handovers running alongside it, PlanRadar's structure is built for that scale.

For a wider look at how snagging apps compare generally, see our honest comparison of the best snagging apps in the UK in 2026. If you are still working from paper or a spreadsheet, our guide on what changes on site when you switch to a snagging app covers the basics. And if Fieldwire is also on your shortlist, we have compared it directly in Snag AI vs Fieldwire: best Fieldwire alternative UK sites.