ChatGPT Enterprise and Custodos compared
ChatGPT Enterprise brings OpenAI's models into a corporate environment. Custodos brings the models of several providers into one platform, operated in the EU or Switzerland. The difference lies in model lock-in, the entry point and the legal jurisdiction.
In short
- ChatGPT Enterprise runs OpenAI models only. Custodos bundles GPT, Claude, Gemini and Mistral behind one login.
- OpenAI offers data residency for the region “Europe (EEA and Switzerland)” as a whole. With Custodos you decide between the EU and Switzerland.
- ChatGPT Enterprise pricing is not published; market reports consistently cite a three-digit seat minimum and annual contracts. Custodos starts at €15 per seat per month, from the first team onwards.
- Neither platform trains models on your business data.
Custodos and ChatGPT Enterprise side by side
Figures for ChatGPT Enterprise come from OpenAI's own documentation. Where OpenAI publishes no numbers, this is stated explicitly.
| Criterion | Custodos | ChatGPT Enterprise |
|---|---|---|
| Model choice | GPT, Claude, Gemini and Mistral – freely selectable per task | OpenAI models only. |
| Hosting region | EU or Switzerland – you choose the region | Data residency in ten regions, among them “Europe (EEA and Switzerland)” as one combined region. |
| Switzerland as its own region | Yes, selectable separately from the EU | No. Switzerland is part of the combined Europe region, not a separate choice. |
| Training on your data | No | No. OpenAI states that it does not train on business data from enterprise workspaces. |
| Entry price | €15 to €90 per seat per month, published | Not published. Pricing is negotiated individually through sales. |
| Seat minimum | None – from the first team onwards | OpenAI publishes no figure; market and procurement reports consistently cite around 150 seats and an annual contract. |
| Free trial | 7 days | No self-service access at enterprise level. The entry point for small teams is ChatGPT Business. |
| Professional secrecy in DACH | Designed for § 203 of the German Criminal Code, § 121 of the Austrian Criminal Code and Art. 321 of the Swiss Criminal Code | No product-level statement on these provisions. |
| Financial supervision in DACH | Supports outsourcing requirements from BaFin and MaRisk, the EBA, the FMA and FINMA | A general enterprise compliance programme with no reference to DACH supervisors. |
| Provider | Custodos, St. Gallen (Switzerland) | OpenAI, San Francisco (USA). |
As of August 2026. Figures for the other provider come from that provider's own sources, linked below. Prices and features change – check both before you decide.
Where the difference shows in daily work
Four points that separate a platform from a single model provider.
Four providers instead of one
Buying ChatGPT Enterprise means buying OpenAI. Custodos keeps GPT, Claude, Gemini and Mistral available in parallel – so you stay able to act when one provider changes prices, availability or terms.
The EU and Switzerland are two answers
OpenAI treats “Europe (EEA and Switzerland)” as one region. For organisations that must fix the processing location as Switzerland or as the EU, that is not a decision but a blanket assurance.
No seat-minimum conversation
Custodos starts with one team at €15 per seat per month. The enterprise entry point at OpenAI runs through sales, at a volume many SMEs cannot fill.
Built around the DACH legal framework
Professional secrecy, the revFADP, supervisory requirements for outsourcing: Custodos is built for organisations where these questions come at the start of a selection process, not at the end.
When Custodos is the right choice
Security in detail- When you do not want to commit to one model provider: The model market moves fast. One route to every leading model turns switching into a setting rather than a project.
- When the organisation is smaller than an enterprise contract: Law firms, fiduciary offices and mid-sized companies need the same governance features as corporations, but not their seat counts. Custodos starts with the first team.
- When the processing location has to be documented: You choose the EU or Switzerland; we provide the data processing agreement and the documentation for your review.
Custodos supplies the technical preconditions for handling your data confidentially. The legal assessment in each individual case remains with your organisation.
What speaks for ChatGPT Enterprise
OpenAI builds the models that set the pace of this market and ships new capabilities in its own product first. If you want the newest tier immediately and work with GPT only anyway, going to the source is faster than any platform in front of it.
OpenAI has also come a long way on the plumbing – that belongs in an honest comparison:
- Data residency in ten regions at no extra cost, with in-region inference for supported locations.
- A mature administration package with SSO and SAML, SCIM provisioning, role-based permissions, audit logs, a compliance API and enterprise key management.
- Audited evidence such as SOC 2, which Custodos does not currently provide in that form.
- The largest user base on the market: many employees already know the interface from private use, which lowers training effort.
Sources
- Data residency and inference residency for ChatGPT · OpenAI Help Center
- Enterprise privacy at OpenAI · OpenAI
- Expanding data residency access to business customers worldwide · OpenAI
All product and company names mentioned are trademarks of their respective owners. Custodos has no business relationship with the providers compared here; this comparison is based solely on publicly available information.
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