The Intelligence Platform for Accountancy Firms

Firmology by The AIR Network tracks, ranks and analyses tens of thousands of accountancy firms. Explore firm rankings by fee income, years of historical financial data, leadership contacts, AI-powered growth forecasts and accounting software market share — all in one place. Choose your market to get started.

Choose your market

  • 67,695+ Firms tracked worldwide
  • £41bn+ + $165bn+ Market value by territory
  • 15 Years of data

What Firmology Is

Firmology is the definitive intelligence platform for accountancy-market data. We track 70,000+ accountancy firms across the United Kingdom and United States, combining official registry data from Companies House and SEC EDGAR with firm submitted data and dedicated research — 15 years of history, leadership contacts, and AI-powered growth forecasts in one place.

Core Functions — Everything You Need to Understand the Accountancy Market

From comprehensive rankings and an interactive map to AI growth forecasts, contacts, international networks, and pay-as-you-go lead enrichment.

Rankings & Firms Explorer

Comprehensive firm rankings by fee income, partners, and employees across 70,000+ accountancy firms. Search, filter, and drill into financials, office locations, group structures, and full company history.

  • Rankings by fee income, partners and employees
  • Filter by segment and track year-over-year movements
  • Full financial and company history per firm

Interactive Map

Visualise firm locations on an interactive map. Click markers for firm details, filter by segment, and identify geographic clusters of accounting expertise.

  • Clickable markers with firm information
  • Filter firms by market segment
  • Geographic clustering visualisation

Historical Tracking

15 years of historical data (2010–2025). Track year-over-year changes, compare performance across time periods, and identify long-term market trends.

  • 15 years of comprehensive data
  • Year-over-year comparisons
  • Historical ranking movements

Multi-Format Export

Generate professional reports in multiple formats. Export to Excel for analysis or create 100+ page PDF reports with charts, tables, and executive summaries.

  • Professional PDF reports
  • Excel data exports
  • Executive summary sections

AI Growth Forecasts

AI-powered predictions forecast future rankings and growth: 5-year projections with confidence scores, trend analysis, and scenario planning.

  • 5-year growth forecasts
  • Confidence scoring system
  • What-if scenario analysis

Pay-As-You-Go Lead Enrichment COMING SOON — learn more

Turn a raw list of leads into matched firm intelligence in minutes: upload a CSV of names or companies, preview exactly which rows we can match, then download enriched rows with firm matches, financials, and decision-makers. Pay only for the rows we enrich.

  • 1. Upload — a CSV of names, companies, websites, or emails
  • 2. Preview — see which rows match before you pay
  • 3. Download — enriched rows with firms, financials and contacts

Contacts Explorer

Find directors, company secretaries, and key personnel at tracked firms — 100,000+ contacts linked to accountancy firms with map and role filtering.

  • Directors and key personnel per firm
  • Role and job-title filtering
  • Map-based contact discovery

International Networks COMING SOON

Explore international accounting networks and associations, and see which tracked firms belong to each network's membership.

  • Network and association coverage
  • Member firms per network
  • Network footprint across markets

Cross-Region Comparison COMING SOON

Compare firms and markets across territories. Switch between the UK and US editions to benchmark markets side by side, in each market's native currency.

  • UK and US market coverage in one platform
  • Per-territory rankings and financials
  • Native-currency reporting per market

Explore Firmology UK or explore Firmology US to see these features in your market.

Who Firmology Is For — Firms, Vendors & Investors

For Accountants & Firm Leaders

  • Benchmark your firm against competitors
  • Explore the full market with Firms Explorer
  • Identify M&A targets and growth opportunities
  • Track ranking movements and positioning
  • Generate board-ready PDF reports

For Accounting Software Vendors

  • Identify high-growth firms for sales targeting
  • Find key decision-makers via Contacts Explorer
  • Enrich event lead lists on a pay-as-you-go basis
  • Understand market segmentation
  • Export data for CRM integration

For Investors & M&A Advisors

  • Comprehensive due diligence via Firms Explorer
  • Research firm leadership with Contacts Explorer
  • Historical growth patterns and CAGR
  • Acquisition activity tracking
  • Predictive analytics for timing

Built on Official Data Sources

Firmology aggregates and analyses data from authoritative sources in both markets, ensuring accuracy and reliability for critical business decisions.

  • Companies House — Official UK Registry
  • SEC EDGAR — Official US Registry
  • Accountancy Age — Industry Rankings
  • In-house Research — Dedicated Analysis
  • AI Research — Advanced Analytics
  • Firm Submitted Data — Direct Submissions

Frequently Asked Questions

What is Firmology?

Firmology by The AIR Network is the definitive intelligence platform for accountancy-market data. It tracks, ranks and analyses 70,000+ accountancy firms across the United Kingdom and United States, with firm rankings by fee income, 15 years of historical financial data, leadership contacts, AI-powered growth forecasts, and accounting software market share analysis.

Which markets does Firmology cover?

Firmology currently offers two editions: Firmology UK covering the United Kingdom accountancy market, and Firmology US covering the United States accounting market. Each edition provides rankings, financial data, contacts and forecasts for its market, and you can compare firms and markets across regions. See firmology.ai/uk and firmology.ai/us for market-specific detail.

What data sources does Firmology use?

Firmology aggregates data from official company registries — Companies House in the UK and the SEC's EDGAR database in the US — alongside in-house research by The AIR Network, AI-assisted analysis, and firm-submitted data provided directly by practices.

What is the difference between the UK and US editions?

Each edition is scoped to its own market: firm coverage, rankings, financial data and contacts are territory-specific, reported in the market's native currency (GBP for the UK, USD for the US) and sourced from that market's official registry. Your account can hold access to one or both regions, and the platform lets you switch between them.

How does pay-as-you-go lead enrichment pricing work?

Lead enrichment is priced per enriched row: upload a CSV of names or companies, preview exactly which rows Firmology can match to tracked firms, and pay only for the rows you choose to enrich. There is no subscription required — the live per-row rate is shown before you commit.

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