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Accounting · head to head

IRIS KashFlow vs Maxio

IRIS KashFlow logo

IRIS KashFlow

Accounting

Online accounting software for UK sole traders and small businesses

From
£13.5/month
Rated
-
Full reviewWebsite
Maxio logo

Maxio

Accounting

Billing and financial reporting platform for B2B SaaS companies

From
$599/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; Maxio entry-level Grow plan starts at $599/month, making it costly for very early-stage startups.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where IRIS KashFlow and Maxio differ
AttributeIRIS KashFlowMaxio
Starting price£13.5/month$599/month
PlatformsWebweb, api

Identical on both: pricing model (subscription), 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 Maxio does not also cover.

Only in Maxio

  • Usage-based billing
  • Subscription management
  • Revenue recognition
  • SaaS metrics dashboards
  • Dunning and collections
  • Accounting and CRM integrations

What people use each for

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

IRIS KashFlow

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

Maxio

  • Billing for B2B SaaS companies with complex contractsnot IRIS KashFlow
  • Usage-based and hybrid pricing meteringnot IRIS KashFlow
  • GAAP/IFRS revenue recognition for finance teamsnot IRIS KashFlow
  • SaaS metrics reporting for investors and boardsnot 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

Maxio

  • Entry-level Grow plan starts at $599/month, making it costly for very early-stage startups.
  • Pricing above the Grow tier requires a custom quote rather than transparent self-serve pricing.
  • Focused specifically on B2B SaaS billing, so it lacks general e-commerce checkout or consumer payment features found in platforms like FastSpring.
  • Advanced features like multi-entity support and expense amortization are gated behind paid add-ons.

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

Maxio

$599/month
  • Grow$599/month
    • For businesses up to $100k in monthly billings
    • Usage-based and recurring billing
    • Automated invoicing and dunning
  • Scale$undefined/month
    • For businesses over $100k in monthly billings
    • Advanced revenue management add-ons
    • Multi-entity support

Which should you pick?

Choose IRIS KashFlow if

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

IRIS KashFlow review

Choose Maxio if

  • You need usage-based billing.
  • You work on web, api.
  • You also want subscription management.
Maxio review

Questions people ask

Is IRIS KashFlow or Maxio better?
Neither clearly leads. IRIS KashFlow starts at £13.5/month and Maxio at $599/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IRIS KashFlow or Maxio?
IRIS KashFlow starts at £13.5/month and Maxio at $599/month.
Does IRIS KashFlow or Maxio run on more platforms?
IRIS KashFlow runs on Web. Maxio runs on web, api.
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 Maxio is typically brought in for.
What can IRIS KashFlow do that Maxio cannot?
Maxio covers Usage-based billing, Subscription management, Revenue recognition, SaaS metrics dashboards.

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
Maxio: What does Maxio cost?

Maxio's Grow plan costs $599/month for businesses with up to $100k in monthly billings. Businesses above that threshold need the Scale plan, which requires a custom quote from Maxio's sales team.

Source
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
Maxio: Is there a free plan?

No, Maxio does not offer a free plan. The Grow plan at $599/month is the entry point, with unlimited users included at no extra cost.

Source
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
Maxio: What does Maxio integrate with?

Maxio integrates with accounting systems like QuickBooks, Xero, and NetSuite, CRMs including Salesforce, HubSpot, and Pipedrive, and 20+ payment gateways alongside its own Maxio Payments.

Source
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