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VariationFlow vs Site Samurai

Construction management software for UK contractors: applications for payment, CIS, purchase orders, RAMS, invoices and site records on one platform, on three monthly plans with unlimited users.

Checked 14 October 2026 against Site Samurai’s own public pages

Choose Site Samurai if

You want applications for payment, CIS, purchase orders, RAMS and invoices in one system with a Xero or Sage connection, and a 14-day trial before you commit.

Choose VariationFlow if

Variations start on site and you want each one captured there with its evidence, the NEC4 subcontract and JCT deadlines worked out for you, a CVR on every job, and a free plan for your first job.

Side by side

VariationFlowSite Samurai
Who it is built forVariationFlowUK specialist subcontractors working under main contractors: fit-out, dry lining, flooring, electrical, mechanical, fire protection, roofing and groundworks among them. Domestic builders have a plan of their own.Site SamuraiUK contractors. Its comparison pages describe a UK SME subcontractor paying CIS labour and running applications, purchase orders and RAMS across several live schemes.Sources12
PricingVariationFlowPublished. VariationFlow is £200 a month + VAT with unlimited users; VariationFlow + QA Flow £400; Builder £49 for domestic builders. 6-month minimum term, 20% off annually.Site SamuraiPublished: Starter £99, Professional £199 and Enterprise £699 a month, each with unlimited users; its comparison pages mention 17% off annually. VAT is not mentioned beside the plan prices.Sources12
Variations from siteVariationFlowCaptured on site on a phone in about a minute: photos, a voice note, the location and the requester’s signature. Each gets a project reference and goes to the main contractor with a review link that needs no account.Site SamuraiValuations and variations tracking, with variations tracked against the contract value and carried into the valuation, and daywork variations tracked and claimed. Its app takes photos tagged with project and location. Capturing a variation on site from a phone is not stated as such.Sources123
UK contract and payment deadlinesVariationFlowNEC4 subcontract compensation event clocks (61.3 notification, 62.3 and 62.6 quotation), JCT confirmation of verbal instructions, and Construction Act payment dates: due date, payment notice, pay less notice and final date.Site SamuraiConstruction Act section 111 pay less notice tracking, with payment, pay less and payee notices generated as PDFs, and applications for payment with deadline reminders. Early warning notices are described as NEC compliant. NEC4 compensation event periods and JCT notices are not named as features on the pages read.Sources12
Cost value reconciliationVariationFlowA CVR per project and period: value from your valuations, cost by head with accruals and provisions, and your QS’s forecast, with a portfolio view across jobs.Site SamuraiBudget versus actual cost reporting. A cost value reconciliation report is not stated.Source
Accounts, ERP and CISVariationFlowNot an ERP. It holds no ledger, runs no payroll, files no CIS returns and raises no purchase orders. It sends certified valuations and homeowner invoices to Xero, Sage Accounting or QuickBooks Online as sales invoices, with the retention and the VAT treatment set, and marks them paid when the package does, on every paid plan. Costs come in from an export of your accounts package.Site SamuraiPurchase orders with multi-level approval and invoices, with a Xero and Sage integration on the Professional and Enterprise plans. CIS verification and compliance on every plan, with a CIS Resource add-on at £9.99 a month.Sources12
Mobile app and no signalVariationFlowiPhone and Android app that captures with or without signal and sends when the phone is back online, in the crew’s own language.Site SamuraiiOS and Android apps, free with all plans, which its app page says work offline and sync when back online, with daily diaries and RAMS sign-off on site. Its pricing page lists offline-capable site capture under the Enterprise plan.Sources12
Free plan or trialVariationFlowFree for your first job: 1 project and 2 users, no card.Site SamuraiA 14-day free trial on every plan, cancel anytime, with Enterprise trials through its sales team. A free plan is not stated.Sources12

Questions

How much does Site Samurai cost?
Site Samurai publishes three plans: Starter at £99, Professional at £199 and Enterprise at £699 a month, each with unlimited users and a 14-day free trial. VAT is not mentioned beside the prices on its pricing page.
What is the difference between Site Samurai and VariationFlow?
Site Samurai is a broad operations platform covering applications for payment, CIS, purchase orders, RAMS, invoices and site records. VariationFlow concentrates on the commercial side of a specialist subcontractor’s job: variations captured on site with their evidence, the NEC4 subcontract and JCT deadlines, Construction Act payment dates and a CVR per job, with a free plan for your first job.
Does Site Samurai track pay less notices?
Its comparison pages describe Construction Act section 111 pay less notice tracking, with payment, pay less and payee notices generated as PDFs. VariationFlow works out the same payment dates and adds the NEC4 subcontract compensation event periods and JCT notices.

Sources

What this page says about Site Samurai comes from the sources above, read on 14 October 2026. “Not stated on their public pages” means we could not find it said there, not that the product lacks it. Site Samurai is a trade mark of its owner, who has not reviewed this page. Something wrong or out of date? Tell us and we will correct it.

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