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AI assistants tools used by Professional Services companies

Each line links its public proof and the date usedby last checked it.

18

Professional Services companies use AI assistants tools

9 confirmed 5 observed 4 signals

The most used: Claude (13), Gemini (5), and ChatGPT (3).Data as of Oct 25, 2026

Ranking

Tools ranked by the Professional Services companies that use them. Ties go to the stronger proof.

Largest and best-proven users

Two labelled views of the same companies. Neither is a score.

Largest companies

By employee range. Size known for 13 of 18.

Strongest proof

Confirmed or declared: 9 of 18. This view filters what you read, never what is counted.

  • HarveyConfirmed1,001–5,000 employeesChecked Oct 22, 2026
  • DocusignConfirmed5,001–10,000 employeesChecked Oct 19, 2026
  • FreshfieldsConfirmedChecked Oct 19, 2026

Who uses each tool

Strongest proof first. A job post is a signal, the weakest proof.

  1. 1Claude13 companies · Checked Oct 25, 202613
    5 confirmed 5 observed 3 signals

    Claude profile

    Show 3 more companies
  2. 2Gemini5 companies · Checked Oct 19, 20265
    5 confirmed 0 observed

    Gemini profile

  3. 3ChatGPT3 companies · Not dated3
    0 confirmed 3 observed

    ChatGPT profile

  4. 4Microsoft Copilot1 company · Checked Oct 21, 20261
    0 confirmed 0 observed 1 signal

    Microsoft Copilot profile

How usedby counts

9 confirmed 5 observed 4 signals

A company counts once per tool, at its strongest proof: confirmed (a case study, a named testimonial, a press release or the company's own account), declared (the company told usedby), observed (a vendor logo wall or customers page) or signal (a job post). Counts cover the companies on usedby, never the whole market.

No software vendor had to be left out.

Data as of October 25, 2026.

Questions

Which AI assistants tools do Professional Services companies use most?

Claude leads: 13 of the 18 Professional Services companies on usedby that use AI assistants tools use it. Next: Gemini (5), ChatGPT (3), and Microsoft Copilot (1). See Claude.

How many Professional Services companies use AI assistants tools?

18 Professional Services companies on usedby use at least one of 4 AI assistants tools. It counts the companies usedby tracks.

What proof backs these lines?

Of the 18 companies, each counted at its strongest proof: 9 confirmed, 0 declared, 5 observed and 4 known from a job post.

How does usedby build this ranking?

usedby counts each Professional Services company once per tool, from public proof: case studies, press releases, the company's own site or its declaration to usedby, vendor customer pages and job posts. Every line shows its proof and the date usedby last checked it.