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Site Samurai
What Site Samurai is
Site Samurai is construction management software for UK contractors. Its platform brings together tenders, applications for payment, RAMS, fleet, subcontractors, and CIS workflows. Commercial tools cover tender management, applications for payment, valuations and variations tracking, early warning notices, final accounts, and budget-versus-actual reporting. Health and safety tools include RAMS templates, AI-generated risk assessments, toolbox talks with sign-off, incident reporting, policy management, and audit trails. Site Samurai AI can also create toolbox talks, parse BOQs, find leads through Contracts Finder, analyse safety trends, and identify hazards. Xero and Sage Business Cloud connect through OAuth for two-way invoice, payment, and contact synchronisation; Sage 50 desktop and Sage 200 are not supported. CIS checks are performed on the HMRC portal, with the result and deduction rate recorded in Site Samurai. The companion app works offline on iOS 16+ and Android 10+, then syncs when it reconnects. It is included with all plans. Plans are billed monthly and start at £99 a month. There is no free plan, but a 14-day trial is available. The company says customer data is held in UK data centres.
Who it suits
Site Samurai is aimed at UK contractors that want commercial, safety, subcontractor, and CIS workflows in one platform. Its mobile app and integrations may suit teams working offline or using Xero or Sage Business Cloud.
What it does well
- Combines tender, payment application, RAMS, fleet, subcontractor, and CIS workflows.
- Tracks valuations, variations, early warnings, final accounts, and budgets.
- AI can generate RAMS and toolbox talks, parse BOQs, and identify hazards.
- Xero and Sage Business Cloud sync invoices, payments, and contacts both ways.
- The companion app works offline and is included with every plan.
What to know first
- There is no free plan; the 14-day trial is the free access period.
- Sage 50 desktop and Sage 200 are not supported.
- CIS verification is done manually on the HMRC portal.
Limits
There is no free plan. Starter costs £99 a month and includes applications for payment and CIS compliance, with 25GB document storage; tender management, Xero and Sage integration, and API access are listed on Professional at £199 a month.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Professional | Monthly billing only · Unlimited users · Tender management · Purchase orders and GRN · RAMS and incidents · Xero and Sage integration · API access · 100GB document storage | £199 a month |
| Enterprise | Monthly billing only · Unlimited users · 16 enterprise-only capabilities · Unlimited AI generations · Unlimited document storage · SSO/SAML · Advanced audit logs · Dedicated account manager · SLA-backed support | £699 a month |
| Starter | Monthly billing only · Unlimited users · Unlimited projects · 25GB document storage · Applications for payment · CIS compliance | £99 a month |
As sitesamurai.co.uk lists them, read 30 Sept 2026. The maker's own page has the final word.
Getting started
- Open the Site Samurai website.
- Start the 14-day trial or choose a monthly plan.
- Select a plan: Starter, Professional, or Enterprise.
- Install the companion app on iOS 16+ or Android 10+ if needed.
- Connect Xero or Sage Business Cloud on Professional, if applicable.
Verdict
Site Samurai suits UK contractors who want commercial and safety workflows alongside subcontractor and CIS management, with an offline mobile app included across plans. Starter costs £99 a month and includes applications for payment and CIS compliance. Look elsewhere if you need Sage 50 desktop or Sage 200 integration, or automated CIS verification through an HMRC API.
Questions
How much does Site Samurai cost?
Starter is £99 a month, Professional is £199 a month, and Enterprise is £699 a month. All plans are billed monthly.
Is there a free plan or trial?
There is no free plan. Site Samurai offers a 14-day trial.
Which platforms does it support?
Site Samurai lists web, Android, and iOS. Its companion app supports iOS 16+ and Android 10+.
Which accounting integrations are available?
Xero and Sage Business Cloud connect through OAuth for two-way invoice, payment, and contact synchronisation. Sage 50 desktop and Sage 200 are not supported.
How does CIS verification work?
Users verify subcontractors on the HMRC portal. Site Samurai stores the result and applies the deduction rate.
Where is customer data stored?
The pricing FAQ says customer data is stored in UK data centres and that the service is UK GDPR compliant.
Facts from Site Samurai's own pages
- Accounting integrations
- Xero and Sage Business Cloud connect through OAuth for two-way invoice, payment and contact synchronisation; Sage 50 desktop and Sage 200 are not supported. · sitesamurai.co.uk, 30 Sept 2026
- AI capabilities
- Site Samurai AI can generate RAMS, create toolbox talks, parse BOQs, discover leads from Contracts Finder, analyse safety trends and identify hazards. · sitesamurai.co.uk, 30 Sept 2026
- CIS workflow
- CIS handling is in-product rather than through an HMRC API; users verify subcontractors on the HMRC portal and Site Samurai stores the result and applies the deduction rate. · sitesamurai.co.uk, 30 Sept 2026
- Commercial management
- Commercial features include tender management, applications for payment, valuations and variations tracking, early warning notices, final accounts and budget-versus-actual reporting. · sitesamurai.co.uk, 30 Sept 2026
- Data location
- The pricing FAQ states that customer data is stored in UK data centres and that the service is UK GDPR compliant. · sitesamurai.co.uk, 30 Sept 2026
- Founded
- 2024 · sitesamurai.co.uk, 28 Sept 2026
- Mobile app
- The companion app supports iOS 16+ and Android 10+, works offline, synchronises when back online and is free with all plans. · sitesamurai.co.uk, 30 Sept 2026
- Product purpose
- Site Samurai is construction management software for UK contractors covering tenders, applications for payment, RAMS, fleet, subcontractors and CIS in one platform. · sitesamurai.co.uk, 30 Sept 2026
- Safety management
- Health and safety tools include RAMS templates, AI-generated risk assessments, toolbox talks with sign-off, incident reporting, policy management and audit trails. · sitesamurai.co.uk, 30 Sept 2026
- Security
- The privacy policy states that data is encrypted in transit and at rest and that the company uses access controls, authentication measures, regular security assessments, penetration testing, staff training and incident response procedures. · sitesamurai.co.uk, 30 Sept 2026
- Support
- Starter includes email support with 24-hour response times, Professional includes priority email and phone support, and Enterprise includes a dedicated account manager with SLA-backed support. · sitesamurai.co.uk, 30 Sept 2026
- Target customers
- The company says it is working with its first 10 UK construction companies and describes the product as built by people with civils and contracting experience. · sitesamurai.co.uk, 30 Sept 2026
- Uptime
- The features page advertises 99.9% uptime. · sitesamurai.co.uk, 30 Sept 2026
Where Site Samurai stands on Freedom251
- Purchase Order Software#13 of 26