ChatGPT Enterprise vs Claude Enterprise vs Microsoft Copilot: Which Should Your Company Buy?
Three enterprise AI platforms, three pricing models: Microsoft 365 Copilot at $30 a user, Claude Enterprise from $20 a seat plus usage, ChatGPT Enterprise quote-only. A procurement comparison for UK buyers, June 2026.
By Ivan Pylypchuk, CEO of SoftBlues. Has led Claude and Gemini implementations for finance, legal and healthcare teams across the UK and Ireland.
The three enterprise AI platforms price on three different models, which is why comparing them on headline number alone is misleading. Microsoft 365 Copilot has a published list price of $30 per user per month as an annual add-on (Microsoft, 2026). Claude Enterprise starts at $20 per seat per month billed annually, with model usage billed separately at API rates (Claude Help Centre, 2026). ChatGPT Enterprise publishes no list price at all and is quoted by sales (OpenAI, 2026).
At SoftBlues, an AI consulting firm working with regulated mid-market companies across the UK and Ireland, we deploy all three for clients and choose by fit rather than brand. We are a registered Anthropic Partner Network member, so judge our preference for Claude accordingly; the comparison below is built on each vendor's own published documentation.
Key facts
Who this is for, and who it isn't
This is for an IT, operations or finance lead at a 50-to-500-person UK or Ireland company choosing one enterprise AI platform to standardise on, who needs a procurement-grade view of seats, security, connectors and admin rather than a feature blog. If you are a single team wanting a few Pro seats to experiment, you do not need any of the enterprise tiers yet; start on the team plans and revisit this when you roll out company-wide.
Why can't you compare these three on price alone?
Because they bill on different units. Microsoft prices a flat per-seat add-on on top of a Microsoft 365 licence you may already pay for. Anthropic prices a low seat fee and then charges for what your people actually consume. OpenAI does not publish a number, so the only real figure is the quote you negotiate. A "cheapest" headline can become the most expensive option once you add base licences or heavy usage.
The honest way to choose is to start from where your work already happens. If your company runs on Microsoft 365, Copilot has a structural advantage because it sits inside the tools people already use. If you want the strongest general reasoning and a clean way to connect your own systems and documents, Claude is usually the stronger fit. ChatGPT Enterprise sits between the two, with the widest consumer familiarity.
How do the three enterprise plans compare on the things procurement cares about?
The table below is built from each vendor's published documentation, as of June 2026. Always confirm current terms with the vendor before you sign.
| Dimension | Microsoft 365 Copilot | Claude Enterprise | ChatGPT Enterprise |
|---|---|---|---|
| Headline price | $30/user/month, annual add-on (market: list) | From $20/seat/month annual + usage (vendor) | No public price; quote-only (vendor) |
| Base-licence dependency | Requires qualifying M365 licence | None | None |
| SSO / SCIM | Via Entra ID | SSO, SCIM, domain capture | SAML SSO, domain verification |
| Admin / audit | M365 admin centre, audit logs | Role-based permissions, audit logs, Compliance API | Admin console, analytics dashboard |
| Data used for training | No (enterprise terms) | No (enterprise terms) | No, by default (enterprise terms) |
| Connectors / where it lives | Inside Word, Excel, Outlook, Teams | Connectors plus API; build-your-own integrations | Connectors, GPTs, API |
| Best for | Microsoft 365-native companies | Regulated firms wanting strong reasoning and custom integration | Teams already standardised on ChatGPT |
| Avoid if | You are not on Microsoft 365 | You need a fixed, usage-free seat price | You need a published price for procurement up front |
Figures and features as published by each vendor, June 2026. Microsoft list price is a market reference; usage and negotiated terms vary.
What does each one actually cost once you add everything up?
Microsoft 365 Copilot. The $30 add-on is genuine, but it sits on top of a base licence. Microsoft 365 E5 plus Copilot is reported at around $87 per user per month combined, and Microsoft has announced an E7 "Frontier" suite at $99/user/month bundling E5, Copilot and its agent product (market reports, 2026). If you already run E3 or E5, the marginal cost is just the add-on; if you do not, factor in the base licence.
Claude Enterprise. The $20 seat fee is low because usage is separate, billed at API rates that scale with the models your people use and how heavily they use them. For light users the all-in cost stays low; for heavy users it rises. Reported negotiated enterprise deals sit higher, around $60 a seat with seat and term minimums (market reports, 2026), so model your expected usage rather than trusting the $20 headline.
ChatGPT Enterprise. With no list price, the only honest answer is "get a quote". Third-party reports put negotiated deals in the region of $50–$60 per user per month, but these are estimates, not published terms (market reports, 2026). Treat any specific figure as unconfirmed until OpenAI sends you one.
Which should a regulated UK company buy?
For finance, legal and healthcare teams the deciding factors are usually data handling and auditability, and here the gap is narrower than the marketing suggests. All three offer enterprise terms that exclude your data from training, plus SSO and audit logging. Where they differ is in the depth of controls: Claude Enterprise publishes a Compliance API and customer-managed encryption keys; Microsoft gives you the Purview and Entra stack you may already govern; OpenAI offers enterprise controls but fewer published specifics.
Your compliance team will map this to the usual frameworks: the FCA and SM&CR in financial services, the SRA in legal, the CQC and clinical-safety standards in healthcare, and UK GDPR with the ICO across all of them. None of that is legal advice, but it sets the questions to ask each vendor about data residency, retention and a Business Associate Agreement if you handle health data.
We put our own company on Claude to run operations end to end, which is the closest thing we have to a worked reference; you can read how in our Claude operating-system case study. For a wider view of choosing any AI partner, our guide on how to choose an AI consulting firm in the UK covers the procurement angle, and our breakdown of AI consulting costs in the UK covers the services budget that sits alongside the licence.
What are the red flags when buying an enterprise AI platform?
What questions should you ask each vendor, and what does a good answer sound like?
1. What is the all-in per-seat cost for our actual usage? A good answer models base licence plus add-on, or seat plus expected usage, not just the headline.
2. Where is our data stored and for how long? A good answer names the region and the retention controls you can set.
3. Is our data ever used for training? A good answer is a clear contractual no, with the relevant clause.
4. How do SSO, SCIM and audit logging work with our identity provider? A good answer references your actual stack, Entra or otherwise.
5. What does switching away look like? A good answer explains data export without friction.
Frequently asked questions
Is Claude Enterprise cheaper than Microsoft Copilot?
On the seat fee, yes: Claude Enterprise starts at $20/seat/month versus Copilot's $30/user/month add-on. But Claude bills usage separately and Copilot needs a base Microsoft 365 licence, so the all-in comparison depends entirely on your licences and how heavily your team uses the models (figures as of June 2026).
Why doesn't ChatGPT Enterprise publish a price?
OpenAI sells ChatGPT Enterprise through sales with custom terms, so there is no list price. Third-party reports estimate negotiated deals around $50–$60 per user per month, but those are estimates, not published figures. The only reliable number is the quote OpenAI gives you.
Do any of them train on our company data?
On their business or enterprise tiers, no. Microsoft 365 Copilot, Claude Enterprise and ChatGPT Enterprise all exclude customer data from model training under their enterprise terms. Confirm the specific clause, retention period and sub-processor list in your contract.
Which is best for a Microsoft 365 company?
Usually Microsoft 365 Copilot, because it works inside Word, Excel, Outlook and Teams where the work already happens, which drives adoption. If you are not on Microsoft 365, that advantage disappears and Claude or ChatGPT may be the better fit.
Can we use more than one?
Yes, and many companies do, for example Copilot for everyday Office tasks and Claude for reasoning-heavy or custom-integrated workflows. The cost is running two contracts and two sets of governance, so most settle on one primary platform after a pilot.
How often does enterprise AI pricing change?
Frequently. All three vendors have adjusted plans and prices within the last year. Treat any figure, including the ones here, as "as of June 2026" and reconfirm with the vendor before a procurement decision.
SoftBlues is a registered Anthropic Partner Network member and a Google Cloud Partner, and we deploy Claude, Copilot and ChatGPT for UK and Ireland clients based on fit, not loyalty. If you are choosing between enterprise AI platforms and want a vendor-neutral scoping conversation grounded in your existing stack, book a discovery call, or see how a Claude rollout looks in practice via business automation.
