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Accounting · head to head

IRIS KashFlow vs Rydoo

IRIS KashFlow logo

IRIS KashFlow

Accounting

Online accounting software for UK sole traders and small businesses

From
£13.5/month
Rated
-
Full reviewWebsite
Rydoo logo

Rydoo

Accounting

Expense management with per-user pricing and a five-user minimum, built for European multi-entity teams

From
$10/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: IRIS KashFlow advertised monthly prices of £1.35 (Starter) and £2.75 (Business) are a 90% promotional discount off the standard £13.50 and £27.50 rates, and the promotion is described as lasting 6 months before reverting; Rydoo a five-user minimum means very small teams pay for seats they do not have, which removes Rydoo from consideration for firms of two or three.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which IRIS KashFlow and Rydoo actually diverge.

Attributes where IRIS KashFlow and Rydoo differ
AttributeIRIS KashFlowRydoo
Starting price£13.5/month$10/month
Pricing modelsubscriptionPer user per month
PlatformsWebWeb, iOS, Android

Identical on both: free tier (No), user rating (Not yet rated), category (Accounting).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in IRIS KashFlow

Nothing recorded that Rydoo does not also cover.

Only in Rydoo

  • Receipt OCR
  • Per diem engine
  • Mileage
  • VAT fields
  • Multi-entity
  • ERP export

What people use each for

The jobs each tool is most often brought in to do.

IRIS KashFlow

  • business accountingnot Rydoo
  • invoicing and billingnot Rydoo
  • VAT managementnot Rydoo

Rydoo

  • A Belgian or German employer that must apply statutory per diem rates correctly across staff travelling in several countriesnot IRIS KashFlow
  • A group with five legal entities wanting one expense tool but separate approval chains and ledgersnot IRIS KashFlow
  • A company that already has a corporate card programme and refuses to change banks to get expense softwarenot IRIS KashFlow
  • A finance team recovering VAT on foreign travel and needing the fields captured at claim timenot IRIS KashFlow

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

IRIS KashFlow

  • Advertised monthly prices of £1.35 (Starter) and £2.75 (Business) are a 90% promotional discount off the standard £13.50 and £27.50 rates, and the promotion is described as lasting 6 months before reverting
  • Listed prices are in GBP plus VAT, and the platform's plans are built around UK VAT filing rather than other tax regimes
  • Annual pricing is quoted at RRP £162/year (Starter) and £291.50/year (Business) before the same promotional reduction

Rydoo

  • A five-user minimum means very small teams pay for seats they do not have, which removes Rydoo from consideration for firms of two or three.
  • Pricing is per user rather than per active user, so organisations where most staff claim expenses twice a year still pay a full seat every month for them.
  • There is no card issuing, so real-time spend control and pre-authorisation are outside the product and remain with your bank.
  • Per diem and multi-entity handling sit on the higher tier, so the countries that most need Rydoo generally cannot buy the cheap plan.
  • Receipt extraction quality varies by language and receipt format, and finance teams still review a meaningful share of claims by hand.

Pricing, plan by plan

IRIS KashFlow

£13.5/month
  • Starter Monthly$13.5/month
    • 10 invoices
    • up to 25 bank transactions
    • single user access
  • Business Monthly$27.5/month
    • unlimited invoices
    • unlimited bank transactions
    • multi-user access
  • Starter Annual$162/year
    • 10 invoices
    • up to 25 bank transactions
    • single user access
  • Business Annual$291.5/year
    • unlimited invoices
    • unlimited bank transactions
    • multi-user access

Rydoo

$10/month
  • Essentials$10/month
    • Around 9 per user per month billed annually
    • Five-user minimum
    • Receipt capture, approvals and accounting export
  • Pro$12/month
    • Around 11 per user per month billed annually
    • Per diem engine and advanced policy controls
    • Multi-entity and multi-currency handling
  • Enterprise$undefined/month
    • Quoted pricing
    • Custom ERP and single sign-on work
    • Dedicated support and onboarding

Which should you pick?

Choose IRIS KashFlow if

Nothing in the data separates IRIS KashFlow from Rydoo on the points above - pick on price and on how each one feels to use.

IRIS KashFlow review

Choose Rydoo if

  • You need receipt ocr.
  • You work on Web, iOS, Android.
  • You also want per diem engine.
Rydoo review

Questions people ask

Is IRIS KashFlow or Rydoo better?
Neither clearly leads. IRIS KashFlow starts at £13.5/month and Rydoo at $10/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IRIS KashFlow or Rydoo?
IRIS KashFlow starts at £13.5/month and Rydoo at $10/month.
Does IRIS KashFlow or Rydoo run on more platforms?
IRIS KashFlow runs on Web. Rydoo runs on Web, iOS, Android.
What is IRIS KashFlow best used for?
IRIS KashFlow is most often used for business accounting, invoicing and billing, vat management. Of those, business accounting and invoicing and billing are not what Rydoo is typically brought in for.
What can IRIS KashFlow do that Rydoo cannot?
Rydoo covers Receipt OCR, Per diem engine, Mileage, VAT fields.

Answered from the vendors’ own pages

IRIS KashFlow: What are IRIS KashFlow's core features across all plans?

All IRIS KashFlow plans include unlimited quotes, online VAT submission, mobile app access, 50+ reports, bank feeds, receipt capture, multi-currency support, and payroll for up to 5 employees.

Source
Rydoo: Does Rydoo issue cards?

No. It is expense software only; you keep your existing corporate card or bank programme.

IRIS KashFlow: Are there promotional discounts for new IRIS KashFlow customers?

Yes, new customers receive a 90% discount for 6 months on both Starter and Business monthly plans.

Source
Rydoo: Is there a minimum?

Yes, pricing carries a five-user minimum, so the smallest bill is five seats regardless of headcount.

IRIS KashFlow: Can multiple users access IRIS KashFlow on the Starter plan?

No, the Starter plan is limited to single-user access only. Multi-user access requires the Business plan.

Source
Rydoo: Do I need the Pro plan?

If you operate per diems, multiple legal entities or multi-currency claims, yes. Essentials is for single-entity receipt and approval workflows.

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