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Accounting · head to head

IRIS KashFlow vs Lago

IRIS KashFlow logo

IRIS KashFlow

Accounting

Online accounting software for UK sole traders and small businesses

From
£13.5/month
Rated
-
Full reviewWebsite
Lago logo

Lago

Accounting

Open-source billing infrastructure for usage-based models

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Lago has a free tier, so it costs nothing to try first.
  • 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; Lago free tier limited to 10,000 entities per month with 5M event cap
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where IRIS KashFlow and Lago differ
AttributeIRIS KashFlowLago
Starting price£13.5/monthFree
Pricing modelsubscriptionFreemium with optional paid tiers
Free tierNoYes
PlatformsWebWeb, Cloud, Self-hosted, On-premise, VPC

Identical on both: 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 Lago does not also cover.

Only in Lago

  • Real-time usage metering
  • Multiple pricing models
  • Automated invoicing
  • Prepaid credits
  • Entitlements
  • Multi-currency support
  • Payment orchestration
  • Revenue analytics

What people use each for

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

IRIS KashFlow

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

Lago

  • Building usage-based billing for high-volume APIs and infrastructurenot IRIS KashFlow
  • Implementing metered billing for AI and tokenized servicesnot IRIS KashFlow
  • Creating subscription and hybrid pricing modelsnot IRIS KashFlow
  • Managing multi-currency billing for global companiesnot IRIS KashFlow
  • Maintaining billing infrastructure without vendor lock-innot 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

Lago

  • Free tier limited to 10,000 entities per month with 5M event cap
  • No specific pricing published for Pro annual plan or Scale plan
  • Self-hosted and on-premise deployments require engineering resources
  • Community support only on free tier
  • Scale plan requires annual contracts and sales engagement

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

Lago

Free
  • Build (Free)Free
    • 10,000 managed entities per month
    • 5M usage events per month
    • 1K events per second rate limit
  • Pro$399/month
    • 10,000 entities included (graduated pricing to 100K)
    • 25M usage events included (to 500M with graduated rates)
    • 10K events per second (upgradeable to 100K)
  • Scale$null/custom
    • Custom entity and event volumes
    • 50K events per second (upgradeable to 100K)
    • RBAC and SSO (SAML)

Which should you pick?

Choose IRIS KashFlow if

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

IRIS KashFlow review

Choose Lago if

  • You need real-time usage metering.
  • You want to start without paying.
  • You work on Web, Cloud, Self-hosted, On-premise, VPC.
  • You also want multiple pricing models.
Lago review

Questions people ask

Is IRIS KashFlow or Lago better?
Neither clearly leads. IRIS KashFlow starts at £13.5/month and Lago at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IRIS KashFlow or Lago?
Lago has a free tier; the other does not. Paid plans start at £13.5/month for IRIS KashFlow and Free for Lago.
Does IRIS KashFlow or Lago run on more platforms?
IRIS KashFlow runs on Web. Lago runs on Web, Cloud, Self-hosted, On-premise, VPC.
Can I use Lago for free?
Yes. Lago has a free tier, so you can try it without paying. IRIS KashFlow starts at £13.5/month.
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 Lago is typically brought in for.
What can IRIS KashFlow do that Lago cannot?
Lago covers Real-time usage metering, Multiple pricing models, Automated invoicing, Prepaid credits.

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
Lago: Can I use Lago open-source for free?

Yes, Lago is open-source under the AGPLv3 license and can be self-hosted. The cloud-based Build plan is also free with limits of 10,000 entities and 5M events per month.

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
Lago: What payment providers does Lago integrate with?

Lago integrates with Stripe and Adyen for payment processing. It is not a payment processor itself but orchestrates payments through these providers.

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
Lago: Does Lago support multiple currencies?

Yes, Lago supports multi-currency billing with automatic currency conversion for global businesses.

Source
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