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Practical tips on invoice automation, bookkeeping, and making the most of your accounting software.

A Real WebSocket Hijack Hit an AI Agent Framework. Here's What We Learned About Defense-in-Depth.

A critical WebSocket brute-force vulnerability was disclosed in OpenClaw, one of the leading open-source AI agent frameworks. The fix was straightforward — but the incident exposed a deeper problem: most AI agent deployments have zero defense-in-depth.

Drakon Systems·4 March 2026·6 min read

taxsmall-businessaccounting

Tax Year End Checklist for UK Small Businesses (2025/26)

The 2025/26 tax year ends on 5 April. Here's a practical checklist for sole traders, contractors, and small business owners — covering VAT, expenses, mileage, CIS, invoicing, and Making Tax Digital deadlines.

Drakon Systems·4 March 2026·6 min read

xerosagecomparison

Xero vs Sage 2026: Why We're Migrating Every Client

A practical comparison of Xero and Sage in 2026 based on real migration experience — covering cost, API capabilities, bank feeds, reporting, and why we now recommend Xero to every small business client.

Drakon Systems·3 March 2026·8 min read

vatsmall-businessaccounting

VAT Flat Rate Scheme Explained: Is It Right for Your Small Business?

A plain-English guide to the VAT Flat Rate Scheme for UK small businesses. How it works, who qualifies, the flat rate percentages by sector, and when it actually saves you money — with worked examples.

Drakon Systems·25 February 2026·7 min read

aiclaudegpt

Claude AI vs GPT for Business Automation: A Developer's Honest Take

We run Claude in production for invoice processing and an AI assistant. Here's what we've learned about Claude vs GPT for real business automation — the good, the bad, and the trade-offs nobody talks about.

Drakon Systems·24 February 2026·7 min read

CISconstructionaccounting

CIS Deductions Explained: A Complete Guide for UK Contractors & Subcontractors (2025/26)

A plain-English guide to the Construction Industry Scheme (CIS). Covers deduction rates, how to calculate what you owe, monthly returns, and how to reclaim overpaid tax.

Drakon Systems·18 February 2026·6 min read

xerosagemigration

How We Migrated a Business from Sage to Xero in One Day (And Saved £4,000/Year)

A real case study of migrating an e-commerce business from Sage Desktop to Xero — including 2+ years of data, 300K+ journal entries, and building a custom Shopify integration to replace a £150/month connector.

Drakon Systems·17 February 2026·7 min read

late paymentinvoicingsmall business

Late Payment Interest UK: How to Calculate What You're Owed (2025/26)

A complete guide to late payment interest and debt recovery costs under the Late Payment of Commercial Debts Act 1998. Includes a free calculator.

Drakon Systems·11 February 2026·4 min read

aisecurityautomation

Introducing ShieldCortex: The Security Layer Your AI Agent is Missing

AI agents have persistent memory now — Claude Code, OpenClaw, Moltbot, LangChain, and more. That memory is completely unprotected. We built ShieldCortex — universal middleware that scans, classifies, and protects everything any AI agent remembers.

Drakon Systems·1 February 2026·5 min read

invoicingautomationaccounting

How Much Does Manual Invoice Processing Really Cost Your Business?

The average invoice costs £12–£30 to process manually. Use our free calculator to find your actual invoice processing cost and see how much automation could save.

Drakon Systems·31 January 2026·4 min read

hmrcmileagetax

HMRC Mileage Rates 2025/26: Complete Guide + Free Calculator

Complete guide to HMRC approved mileage rates for 2025/26. Cars and vans: 45p/25p per mile. Plus a free mileage calculator for instant claims.

Drakon Systems·31 January 2026·5 min read

aiautomationproductivity

How We Gave Our AI Assistant Persistent Memory with Claude Cortex

AI assistants forget everything between sessions. Here's how we solved that with Claude Cortex — an open-source memory system inspired by how the human brain works.

Drakon Systems·29 January 2026·5 min read

invoice-automationxerobookkeeping

How to Automate Invoice Processing in Xero: A Complete Guide for Bookkeepers

Learn 4 practical methods to automate invoice processing in Xero. Save hours weekly with AI-powered extraction and smart workflows.

Drakon Systems·24 January 2025·5 min read

zippylangaieducation

Introducing Zippylang: AI-Powered Language Learning for Primary Schools

Meet Zippy, the friendly AI robot tutor helping UK primary school children learn Spanish, French, German, Italian, and Mandarin.

Drakon Systems·14 January 2025·4 min read

invoice-automationaicomparison

Why AI Beats Templates for Invoice Processing

Template-based invoice tools struggle with new suppliers. Here's why AI extraction works better for real-world invoice processing.

Drakon Systems·21 December 2024·3 min read

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