Every firm now faces the same question in some form: which of these AI companies do we actually use? The honest answer is that for most businesses it matters less than the marketing suggests, and the way you adopt matters more than the logo you pick. This page gives you the map; the linked guides go deep on each provider.
The household names, measured
The clearest picture of who the public actually uses comes from Pew Research Center’s February 2026 survey of US adults: 49% now use an AI chatbot of some kind. The ranking, alongside the scale the vendors themselves report:
| Provider | Pew: % of US adults using it | Scale, as reported by the vendor |
|---|---|---|
| ChatGPT (OpenAI) | 44% | 900M+ weekly users (OpenAI) |
| Gemini (Google) | 24% | 950M+ monthly app users (Alphabet, Q2 2026 earnings) |
| Copilot (Microsoft) | 17% | bundled across Microsoft 365 |
| Meta AI | 14% | 1B+ monthly users across Meta’s apps (Meta) |
| Grok (xAI) | 8% | integrated into X |
| Claude (Anthropic) | 6% | consumer share understates professional use |
Two useful conclusions follow. First, your staff already use these tools, whichever policy you have written. Second, consumer popularity is a weak guide to business fit: Claude’s 6% consumer share says nothing about the fact that it is unusually strong at exactly the long-document, careful-writing work professional firms do all day.
The Six Main AI Providers
Each links to its full business guide; the open-weight models guide covers the world beyond the household names.
OpenAI / ChatGPT
The default general tool: biggest user base, broadest features, strongest ecosystem.
Google / Gemini
The Workspace choice, and the engine behind AI answers in Google Search itself.
Microsoft / Copilot
AI inside Outlook, Word, Excel and Teams, where most UK service-firm work lives.
Anthropic / Claude
The specialist for judgement-heavy writing, long documents and dependable agents.
xAI / Grok
Live access to X and a looser voice: strong for monitoring, evaluate hardest for client work.
Meta / Llama
The assistant inside WhatsApp and Instagram, and the family anchoring open-weight models.
Beyond the six
Three more names have earned full guides. Perplexity is the research specialist, citations attached to every answer by design. DeepSeek is the price disruptor whose open-weight releases moved the whole market. Mistral is Europe’s champion, the answer when boards ask where the AI is built and where the data lives. And for evidence rather than positioning, the task-by-task table and our own drafting benchmark show how the field actually compares in use.
How to choose
Three questions settle most of it:
- Where does your work already live? If your firm runs on Microsoft 365, Copilot earns its place by proximity; the same logic points Google Workspace firms at Gemini. The best model you have to copy-paste into loses to a slightly lesser one that is already inside the document.
- What is the highest-stakes thing you want AI to touch? For drafting that goes in front of clients or regulators, quality and reliability differences are real. Trial the same five real tasks on each candidate and judge the output, not the demo; our own benchmark shows the method.
- What are the data terms? Is your data used for training (on business tiers it should not be), where is it processed, how long is it retained, and can you get a data processing agreement that satisfies UK GDPR. Vague answers mean that provider is not ready for that use.
Whatever you pick, keep the exit open: avoid building anything that only works with one vendor’s API. The capability gap between the big providers is the narrowest it has been since 2023, and pricing, models and terms all move quarterly. A firm that can switch pays less and risks less, permanently.
Then write the decision down as an approved-tools list with the one rule that prevents most incidents: client personal data goes only into approved tools on business terms, never into free consumer ones. The UK governance guide covers what sits around that rule.
Where I fit in
I run AI tooling across my own business and build with these providers daily, including fallback setups where one provider’s outage or price change cannot take a client system down. If you want the provider question answered for your firm specifically, against your actual processes rather than in the abstract, that is the first hour of an Automation Audit, and it usually settles the debate for good.