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Accounting · head to head

IRIS KashFlow vs Stigg

IRIS KashFlow logo

IRIS KashFlow

Accounting

Online accounting software for UK sole traders and small businesses

From
£13.5/month
Rated
-
Full reviewWebsite
Stigg logo

Stigg

Accounting

Usage runtime platform for credits and entitlements

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Stigg 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; Stigg free tier limited to 10,000 entities and 5M events per month
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where IRIS KashFlow and Stigg differ
AttributeIRIS KashFlowStigg
Starting price£13.5/monthFree
Pricing modelsubscriptionFreemium with usage-based and custom tiers
Free tierNoYes
PlatformsWebWeb, Cloud, BYOC, BYODB, API

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 Stigg does not also cover.

Only in Stigg

  • Real-time credit enforcement
  • Financial-grade credits
  • High-scale metering
  • Budget governance
  • Flexible deployment
  • Billing platform integration
  • Data warehouse integration
  • CRM integration

What people use each for

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

IRIS KashFlow

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

Stigg

  • Managing token and credit usage for AI productsnot IRIS KashFlow
  • Enforcing spending caps and budget controlsnot IRIS KashFlow
  • Implementing prepaid credit systems with expirynot IRIS KashFlow
  • Real-time entitlement verification for feature accessnot IRIS KashFlow
  • Scaling billing infrastructure for high-volume eventsnot 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

Stigg

  • Free tier limited to 10,000 entities and 5M events per month
  • Pro plan pricing ($399/month) may be high for early-stage companies
  • Scale and BYOC plans require custom contracts and sales engagement
  • Primarily targets AI and high-scale use cases, not all business models
  • Requires integration with separate billing platform (Stripe, Zuora, etc.)

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

Stigg

Free
  • Build (Free Forever)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)
  • BYOC$40000/year
    • Deploy in customer VPC
    • Unlimited entities and events
    • No event billing

Which should you pick?

Choose IRIS KashFlow if

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

IRIS KashFlow review

Choose Stigg if

  • You need real-time credit enforcement.
  • You want to start without paying.
  • You work on Web, Cloud, BYOC, BYODB, API.
  • You also want financial-grade credits.
Stigg review

Questions people ask

Is IRIS KashFlow or Stigg better?
Neither clearly leads. IRIS KashFlow starts at £13.5/month and Stigg at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IRIS KashFlow or Stigg?
Stigg has a free tier; the other does not. Paid plans start at £13.5/month for IRIS KashFlow and Free for Stigg.
Does IRIS KashFlow or Stigg run on more platforms?
IRIS KashFlow runs on Web. Stigg runs on Web, Cloud, BYOC, BYODB, API.
Can I use Stigg for free?
Yes. Stigg 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 Stigg is typically brought in for.
What can IRIS KashFlow do that Stigg cannot?
Stigg covers Real-time credit enforcement, Financial-grade credits, High-scale metering, Budget governance.

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
Stigg: How quickly does Stigg check entitlements?

Stigg makes entitlement checks in under 10 milliseconds, enabling real-time enforcement of spending decisions before token consumption.

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
Stigg: Can I use Stigg with my existing billing platform?

Yes, Stigg integrates with major billing platforms including Stripe, Zuora, Chargebee, Metronome, and Orb to manage entitlements and credits.

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
Stigg: What deployment options does Stigg offer?

Stigg offers cloud API, BYOC (Bring Your Own Cloud) for VPC deployment, and BYODB options for customers who want to manage their own database.

Source
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