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Est. 2005 - showing its age

KashFlow Was Great.
In 2005.

KashFlow pioneered UK cloud accounting nearly 20 years ago. But the world has moved on. If you're starting fresh today, you deserve software built for 2024, with AI that actually helps.

Try AccountsOS FreeSee Full Comparison

KashFlow is a reliable UK accounting platform with MTD compliance and solid invoicing, starting from £8/month, with a loyal user base built over nearly two decades. AccountsOS costs £20/month with a 14-day free trial, and is built AI-native from the start: Finn answers accounting questions in plain English, auto-categorises transactions, and provides proactive tax guidance, making it the better starting point for directors choosing software today.

The Problem with Legacy Software

KashFlow has loyal users - and there's nothing wrong with sticking with what works. But if you're choosing software today, here's what you should know:

Nearly 20 Years Old

Built when MySpace was popular. The architecture and interface reflect 2005 web standards, functional but dated.

Corporate Ownership

Acquired by IRIS in 2013. Now part of an enterprise software portfolio, your needs aren't their priority.

No AI Innovation

Traditional software approach. Manual categorization, report generation, menu navigation. No AI assistance.

KashFlow

A veteran of UK cloud accounting. Works, but built for a different era.

  • Interface designed in 2005
  • Owned by IRIS (enterprise focus)
  • No AI - everything is manual
  • Loyal users, but aging fast

AccountsOS

AI-native accounting built specifically for UK Ltd company directors. Just ask what you need to know.

  • "What's my corporation tax estimate?" - instant answer
  • Voice input while driving - log expenses hands-free
  • AI categorizes receipts - dump and forget
  • Built in 2024 with modern tech

Legacy vs Modern Accounting

Software from 2005 and software from 2024 work very differently. Here's what that means for you:

Reports and menus
Just ask
Stop navigating - type your question and get an answer
Manual categorization
AI auto-categorization
Drop receipts in, AI figures out the rest
Desktop-first design
Mobile-first AI
Use voice commands while driving, walking, or anywhere
Static dashboards
Conversational insights
Ask follow-up questions, drill down naturally
Periodic updates
Continuous AI improvement
AI gets smarter with every interaction
Enterprise owner roadmap
Solo founder focus
Features built for directors, not finance teams

Pricing Comparison

KashFlow offers competitive pricing, but you get 2005-era software. AccountsOS gives you AI-native accounting at a similar price point.

KashFlow Starter

£8/month

  • Basic invoicing only
  • No bank feeds
  • Limited features

KashFlow Business

£18/month

  • Bank feeds included
  • Still limited reporting
  • Dated interface

KashFlow Business + Payroll

£27/month

  • Payroll included
  • No AI features
  • Legacy software experience

AccountsOS

£20/month

  • Everything included
  • AI features standard
  • Modern 2024 interface

Similar price. Very different experience.
KashFlow's Business tier is £18/month. AccountsOS is free for 14 days (then £20/month) with AI features and a modern interface built for today.

Feature Comparison

What you get from legacy vs modern accounting software.

FeatureAccountsOSKashFlow
Ask questions in plain English
"How much did I spend on software this quarter?" vs running reports
Voice input while driving
Log expenses hands-free: "£45 client lunch at The Ivy"
AI auto-categorization
Drop receipts and forget - AI handles the rest
Proactive tax optimization
Get alerts about claimable expenses and optimal salary/dividend splits
Modern interface
AccountsOS built in 2024 vs KashFlow's 2005-era design
Setup time
KashFlow requires more manual configuration
5 minutes30-60 minutes
UK Ltd director-specific
AccountsOS built specifically for your exact situation
Partial
Director salary/dividend optimization
Know exactly how to pay yourself tax-efficiently
Bank reconciliation
Both connect to UK banks
Invoice creation
Both handle invoicing
MTD for VAT
Both support Making Tax Digital for VAT
On HMRC's list of MTD VAT software (opens gov.uk in a new tab)
Independent development
AccountsOS is founder-led. KashFlow is owned by IRIS (enterprise focus)

Respect for KashFlow Users

KashFlow pioneered UK cloud accounting and has served thousands of businesses well for nearly two decades. If you're a happy KashFlow user with established workflows, there's no shame in sticking with what works.

But if you're choosing accounting software for the first time, or ready for something built for how you work today, with AI assistance, voice input, and a modern interface, AccountsOS is worth a look.

Frequently Asked Questions

Is KashFlow still being actively developed?

KashFlow was acquired by IRIS (a large enterprise software company) in 2013. While it still receives updates for compliance, the core product and interface haven't evolved significantly. IRIS's focus is increasingly on enterprise solutions. AccountsOS is actively developed with new AI features shipping regularly.

Why does KashFlow's interface feel dated?

KashFlow launched in 2005, making it nearly 20 years old. While functional, the interface reflects the web design standards of that era - lots of menus, separate screens for everything, and a desktop-first approach. AccountsOS was built in 2024 with AI-native design, voice input, and mobile-first thinking.

Does KashFlow have any AI features?

No. KashFlow is traditional accounting software - you manually categorize transactions, generate reports, and navigate menus. AccountsOS was built AI-native from day one. You chat with your books in plain English, use voice commands, and get proactive tax optimization suggestions automatically.

Can I switch from KashFlow to AccountsOS?

Yes. Export your transactions from KashFlow as CSV, upload to AccountsOS, and you're running in minutes. Our AI helps categorize everything and learns your patterns. Most directors find the transition surprisingly easy.

What happened when IRIS bought KashFlow?

IRIS acquired KashFlow in 2013 to add a cloud offering to their enterprise software portfolio. While existing users have been supported, development focus has shifted toward IRIS's enterprise priorities. Solo founders are no longer the primary audience. AccountsOS is built specifically for UK Ltd directors.

When would KashFlow make sense?

KashFlow can work well if you're already familiar with it and have established workflows. Long-time users who don't need AI features may prefer to stick with what they know. But for new users starting fresh, a modern AI-native solution like AccountsOS will serve you better from day one.
Trustpilot5 out of 5 stars

I love the innovative approach to accounting

I love the innovative approach to accounting, which can often be quite dull. I particularly appreciate how interactive it is, including the emails, reminders, and the ability to anticipate the next step.

Ksenija · SI

Trustpilot5 out of 5 stars

Great UI, fast response

Great UI, very quick at fixing any errors/bugs.

Mitch Edwards · GB

Ready for Modern Accounting?

Software has evolved. Your accounting should too. Stop navigating menus, just ask what you need to know.

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AI-native accounting built for UK Ltd directors.

Free for 14 days. £20/month.