WhosOnLocation (MRI OnLocation) is a generic workplace visitor-management and presence tool that excels at touchless sign-in and campus-wide muster, but it is not construction-specific. The Site Book Site Control is built for UK sites: it generates RAMS/CPP/COSHH, gates inductions until acknowledged, tracks CSCS, runs RFIs and now triggers its own evacuation with a mark-safe roll-call PDF. Choose WhosOnLocation for offices and campuses; choose Site Control for CDM compliance on live construction sites.
WhosOnLocation is the lightest, most generic option here and leads on campus-wide muster across mixed buildings with mature presence tracking, while Site Control is the UK-CDM-first build for construction sites — document generation, induction gating, CSCS, RFIs and, now, its own triggered evacuation and roll-call PDF.
Pricing and feature claims are taken from MRI Software's public OnLocation product, pricing and help-centre pages, fetched 2026-06-06 with pricing re-checked 2026-07-28; figures may change — confirm on the vendor site.
From £675/site per month plus £5,000 one-off setup; volume tiers as sites scale
Published in GBP per location: Small £43/mo (~£454/yr), Medium £127/mo (~£1,335/yr), Large £228/mo (~£2,379/yr), tiered by yearly sign-in volume, with a custom POA tier above that.
Team size
Per active site with unlimited workers (~75+ typical), multiple contractor companies and assigned-site Site Supervisor logins inherited from Business
Single reception desk through to multi-site facilities teams managing many locations.
Best for
Principal contractors and builders running live sites with subcontractors who need UK CDM documents generated plus on-site contractor access, attendance, RFIs and audit-ready evidence in one per-site tool.
Workplaces, offices, campuses and multi-occupier buildings that need touchless visitor and contractor sign-in plus reliable emergency muster — not construction-specific CDM compliance.
Not ideal for
No biometric turnstiles or physical access control, so it cannot secure a Tier-1 perimeter the way hardware-led platforms like MSite can.
Generic workplace VMS, not construction-specific: no RAMS/CPP/COSHH generation, no CSCS card scheme, no block-until-complete CDM induction gating, and no RFIs.
RAMS / CPP / COSHH generation
Generates UK RAMS, CPP, COSHH and method statements from the project brief — unique in this category.
Generic VMS; does not generate UK RAMS/CPP/COSHH or any construction safety documentation — it stores and distributes, not authors.
RAMS
AI-generated, site-specific and editable in-browser on every The Site Book plan; inherited by Site Control.
—
CPP
Full Construction Phase Plans, not just RAMS.
—
COSHH
Standalone COSHH document, site-specific substance register and safety-data-sheet upload with extraction.
—
Method statements
Built-in trade task library plus your own reusable work types and method steps.
—
PCPP import
Upload an existing pre-construction plan and reuse its structure.
—
Document review
Review status and history, optional named-approver routing before issue, and client approve/request-changes via share links.
—
Document checking
—
Site diary
Editable daily entries; owner/admin deletion is permanent, while a Site Supervisor's deletion is retained for owner/admin restore. Live entries and photo counts appear in the Audit Pack.
—
Site files
Drawings, plans, H&S docs, procedures, RAMS, CPP and emergency information.
—
Site portal
Workers get their own link to the documents and information for the sites they are on.
—
Subcontractor tracking
—
Subcontractor evidence
Evidence record, review and archive workflow against the project.
—
Corrective actions
Owner, due date and completion state against each inspection finding.
—
Data export
Includes the Audit Pack: one merged PDF with documents, sign-offs, worker evidence, attendance, incidents, COSHH, permits and up to the latest 500 live Site Diary entries.
—
AI chat
In-app assistant answering from the published Help Centre articles.
—
Permits to work
No construction permit-to-work workflow; contractor access is gated by agreements/inductions, not formal hot-works/permit issuance.
Site inductions
Digital induction blocks check-in until acknowledged - readable in 9 worker languages.
Supports contractor agreements and trigger-based documents/messages at sign-in, but not a true block-until-acknowledged CDM induction gate.
Multilingual inductions (9 languages)
Workers read and acknowledge key H&S details in 9 languages at the entrance QR; the language used is recorded in the audit trail and translations are site-team reviewable.
—
RAMS sign-off (per worker)
Per-worker RAMS acknowledgement can block check-in until the current version is signed. Optional 4-digit PINs add evidence to shared-link document sign-off without changing attendance.
—
Worker cert tracking
CSCS upload, internal review and expiry notifications.
Can capture contractor compliance documents and expiries, but no CSCS-specific card scheme or UK competency model.
Right to work
Records Home Office share-code checks with outcome, expiry and an evidence file (manual verification, not a live API).
No UK Right to Work share-code or ID share-code verification; optional OnScan add-on scans ID for identity capture only.
Contractor self-onboarding
Contractor self-join via the entrance QR with CSCS upload and approval.
Contractors can pre-register and complete agreements ahead of arrival via the contractor portal.
QR / mobile sign-in
Permanent entrance QR for guest sign-in/out and contractor self-join.
Touchless QR/mobile sign-in supported without mandatory hardware; kiosk and OnScan scanner are optional add-ons.
GPS clock-in
Presence is sign-in/sign-out and proximity based; no geofenced GPS clock-in feature published.
Biometric access
No fingerprint or facial biometric capture; integrates with third-party access control rather than providing biometrics.
Physical access control
Does not provide turnstiles itself but integrates with access-control/door hardware to trigger entry on sign-in.
Site attendance
Check-in/out, history and a live people-on-site view.
Tracks on-site presence with sign-in/out timestamps and reporting, though framed as presence rather than payroll T&A hours.
CIS payroll
No UK CIS timesheet-to-pay or payroll export; this is a presence/VMS tool, not a payroll system.
Live people-on-site
Triggered evacuation + muster roll-call: snapshot who is on site, mark each person safe, export a roll-call PDF.
Live people-on-site dashboard plus dedicated emergency evacuation/muster roll-call is a core strength.
Multi-company isolation
Each contractor company sees only its own workforce — test-verified.
Supports multiple locations and contractor companies, but is built for a single managing organisation, not contractor-company self-service data isolation.
RFIs
Create, attach, comment, answer and close — unique in this category.
No request-for-information workflow; not a project-collaboration tool.
Document-review evidence
Version-specific read/acknowledge audit chain.
Captures acceptance of contractor agreements and policy documents at sign-in, but not version-specific document-review acknowledgement chains.
Handover sign-off
Per-plot, per-trade hand-over sign-off signed in person on one phone; certified PDF emailed to developer and contractor; per-plot progress board. Unique in this category.
Toolbox talks
No construction toolbox-talk broadcast-and-acknowledge workflow; can send trigger messages but not trade safety briefings.
Site inspections
No site inspection module.
Incident log
Has alerting and emergency tooling; no dedicated construction incident/accident log out of the box.
Plant / asset management
No plant or asset register; asset-style tracking is for people/visitors, not equipment.
Workforce scheduling
No dispatch, rostering or workforce scheduling.
Multi-site dashboard & exports
Attendance CSV, monthly H&S CSV/PDF and project audit-log exports.
Strong multi-location dashboards and presence/visitor reporting with exports across all sites.
Mobile app
No native app required; workers scan the entrance QR and use the browser on their own phone.
Mobile apps for employees, hosts and evacuation roll-call, plus mobile contractor sign-in.
Offline mode
Offline/evacuation continuity features exist for muster scenarios, but full offline operation is not the headline mode.
Single sign-on (SSO)
SAML single sign-on with Okta or Microsoft Entra; can be required across your company email domain.
—
Public API
Read-only REST API with scoped account keys, rate limiting and an OpenAPI 3.1 spec (projects, documents, workers, certifications, attendance).
—
Outbound webhooks
Signed real-time webhooks — documents generated/signed, certificates expiring, workers checking in — with retries and a delivery log.
—
Reading this table: a tick means supported, a dash means partly supported, and a cross means we checked and it is not supported. An em dash (—) means we have not verified that capability for that product either way — treat it as unknown, not as a missing feature, and check with the vendor.
Who each tool is for
At-a-glance fit per product - pulled from the same data that drives the snapshot table.
The Site Book Site Control
Best for
Principal contractors and builders running live sites with subcontractors who need UK CDM documents generated plus on-site contractor access, attendance, RFIs and audit-ready evidence in one per-site tool.
Not ideal for
No biometric turnstiles or physical access control, so it cannot secure a Tier-1 perimeter the way hardware-led platforms like MSite can.
Team size
Per active site with unlimited workers (~75+ typical), multiple contractor companies and assigned-site Site Supervisor logins inherited from Business
WhosOnLocation (MRI OnLocation)
Best for
Workplaces, offices, campuses and multi-occupier buildings that need touchless visitor and contractor sign-in plus reliable emergency muster — not construction-specific CDM compliance.
Not ideal for
Generic workplace VMS, not construction-specific: no RAMS/CPP/COSHH generation, no CSCS card scheme, no block-until-complete CDM induction gating, and no RFIs.
Team size
Single reception desk through to multi-site facilities teams managing many locations.
The bottom line
Pick the option that matches how your team actually works.
Office, campus or multi-occupier building needing visitor management and evacuation
WhosOnLocation is the better fit — its presence tracking and campus-wide muster across mixed building types are mature and it deploys without hardware. Site Control's construction-specific compliance would be largely unused here.
Main contractor running live UK construction sites under CDM
Site Control wins: it generates RAMS/CPP/COSHH, gates inductions until acknowledged, tracks CSCS expiry, isolates contractor-company data and runs RFIs — none of which WhosOnLocation does. Be honest that Site Control has no biometrics, turnstiles, CIS payroll, GPS geofence or plant register.
Smaller builder wanting fast, unlimited-worker site sign-in with compliance
Site Control fits better — unlimited workers per site, a full CDM pack and its own construction evacuation roll-call beat per-location sign-in tiers; WhosOnLocation suits you only if you mainly need generic visitor logging across non-construction buildings.
Full breakdown per product
Strengths, weaknesses, fit, and the sources every claim came from.
From £675/site per month plus £5,000 one-off setup; volume tiers as sites scale
Best for
Principal contractors and builders running live sites with subcontractors who need UK CDM documents generated plus on-site contractor access, attendance, RFIs and audit-ready evidence in one per-site tool.
Team size
Per active site with unlimited workers (~75+ typical), multiple contractor companies and assigned-site Site Supervisor logins inherited from Business
Sweet spot
A principal contractor running one or more active sites who must generate the CDM pack, control who is inducted and on site, run RFIs, and produce audit-ready attendance and H&S exports without hardware.
Strengths
Generates the full UK CDM pack — RAMS, CPP, COSHH and method statements — and captures sign-off on site; no direct competitor in this category generates UK compliance documents.
Per-site pricing with unlimited workers (~75+) and test-verified multi-contractor-company data isolation, instead of per-seat or per-turnstile economics.
No hardware: a permanent entrance QR plus browser sign-in on the worker's phone means a new site goes live in days with no turnstile capex or install.
Combines RFIs, document-review evidence, CSCS and induction gating, attendance and audit-grade exports in one tool — plus SSO (Okta / Microsoft Entra), a scoped REST API and signed webhooks for enterprise IT.
Plot-by-plot hand-over sign-off: capture every trade signed off on every plot in person, with a certified PDF and a live progress board — no other tool in this category does per-plot trade sign-off.
Provable safety, not assumed: per-worker RAMS sign-off (which can block check-in until the current method statement is signed), right-to-work evidence records with expiry, and a triggered evacuation muster roll-call with a roll-call PDF — all rolled into one Audit Pack export.
Weaknesses
No biometric turnstiles or physical access control, so it cannot secure a Tier-1 perimeter the way hardware-led platforms like MSite can.
No CIS payroll or GPS-geofenced clock-in, so payroll-accuracy-led buyers may prefer Chime or Donseed.
No plant/asset management or workforce scheduling — adjacent operations tools cover those.
New plan on a recently launched product, with a shorter track record than established incumbents.
Check the product detail
These maintained Help Centre guides show exactly how the controls behind this comparison work.
Published in GBP per location: Small £43/mo (~£454/yr), Medium £127/mo (~£1,335/yr), Large £228/mo (~£2,379/yr), tiered by yearly sign-in volume, with a custom POA tier above that.
Best for
Workplaces, offices, campuses and multi-occupier buildings that need touchless visitor and contractor sign-in plus reliable emergency muster — not construction-specific CDM compliance.
Team size
Single reception desk through to multi-site facilities teams managing many locations.
Sweet spot
Facilities and security teams who want mature presence tracking and evacuation roll-call across offices, with optional ID-scan and desk-booking add-ons.
Strengths
Mature, well-proven presence management with a best-in-class emergency evacuation and muster roll-call — arguably the strongest in this comparison set.
Touchless QR/mobile sign-in with no mandatory hardware; optional kiosk and OnScan ID-scanning add-ons keep deployment light.
Transparent published pricing from £43/location/month with clear sign-in-volume tiers — rare in this market.
Strong multi-location dashboards and visitor/contractor reporting, backed by MRI Software's enterprise resources.
Weaknesses
Generic workplace VMS, not construction-specific: no RAMS/CPP/COSHH generation, no CSCS card scheme, no block-until-complete CDM induction gating, and no RFIs.
Per-location pricing scales by sign-in volume, so a busy ~75-worker construction site can outgrow tiers fast while still lacking trade-specific compliance features.
Right to Work, toolbox talks, site inspections and a proper incident log are not provided as construction-grade modules.
Short, straight answers - the same questions real builders ask.
Is WhosOnLocation built for construction sites?
No. WhosOnLocation, now MRI OnLocation, is a generic workplace visitor and presence management system used across offices, campuses and multi-occupier buildings. It handles touchless sign-in, contractor agreements and emergency muster very well, but it does not generate UK RAMS, CPP or COSHH documents, track CSCS cards, or gate site inductions. Site Control is purpose-built for UK construction and CDM compliance instead.
How much does WhosOnLocation cost compared with Site Control?
WhosOnLocation publishes per-location pricing in pounds, from about £43 a month for the Small tier, rising through volume tiers to roughly £228 a month for Large before a custom quote tier. Site Control is £5,000 one-off setup plus £675 per active site each month, with volume discounts. The per-location floor buys sign-in and muster; Site Control's price buys a full UK compliance platform including document generation, induction gating and RFIs.
Does WhosOnLocation track CSCS cards and competency?
Not specifically. WhosOnLocation can capture contractor compliance documents and expiry dates and can scan ID through its optional OnScan add-on, but it has no CSCS card scheme or UK competency model. Site Control treats CSCS and credential tracking with expiry alerts as a core feature, and blocks check-in until the worker has completed the required induction, which a generic visitor-management tool is not designed to enforce.
What does WhosOnLocation do better than Site Control?
Campus-wide muster across mixed building types is WhosOnLocation's standout strength, alongside very mature, widely deployed presence tracking and strong multi-location reporting. It is also the lightest, most generic tool to roll out across non-construction sites, with transparent published pricing. Site Control deliberately focuses on construction: it now runs its own triggered evacuation and roll-call PDF for a site, but does not try to match a dedicated VMS on generic office visitor flows or campus-wide muster across mixed building types.
Does Site Control replace a dedicated visitor management system?
For a construction site, yes: Site Control provides a permanent entrance QR, guest sign-in and out, contractor self-join, live people-on-site, a triggered evacuation with a mark-safe roll-call PDF, and audit-grade exports. For a corporate office estate with reception desks, mixed visitor types and campus-wide evacuation across buildings, a dedicated VMS like WhosOnLocation may suit better. Site Control is honest about its scope — a CDM compliance and site-access platform, not a general office VMS.
Can either tool isolate data between contractor companies?
Site Control provides multi-contractor-company data isolation, verified by tests, so each contractor company sees only its own workers, documents and records. WhosOnLocation supports multiple locations and contractor companies but is designed around a single managing organisation rather than contractor-company self-service isolation. If you run a site with many subcontractors who each need their own private view, Site Control's isolation model is the closer match to that requirement.
How we built this comparison
Pricing and feature claims are taken from MRI Software's public OnLocation product, pricing and help-centre pages, fetched 2026-06-06 with pricing re-checked 2026-07-28; figures may change — confirm on the vendor site.
Every pricing, feature, and fit claim in this comparison is checked against public vendor documentation and, where relevant, independent sources. The “source basis” footer on each product card lists the exact URLs and the date we fetched them. The internal freshness dashboard flags source evidence after 45 days; priority pricing is scheduled for monthly review and feature or ownership claims for quarterly review. Last reviewed on .
