There’s so many reasons. First off, I cannot just download and install arbitrary software on my work machine. It would also never get approved due to governance and compliance reasons, data protection and the fact that I would be using a personal license for work projects. I believe this would violate not only my employment contract but also Claude ToS.

Not much other than corporate policy and Anthropic's policy that you are not allowed to do that unless your company is very small.

Anecdotally, I know that quite a number of people at my company (mid-sized, ~5000 employees) have personal ChatGPT or Anthropic subscriptions they are using. Despite the fact that we have Microsoft Copilot (the web version) for everyone, and Github Copilot (the CLI thing) with low limits (500-1900 credits/month) for people who can justify it. But Copilot isn't all that great compared to Claude Code, so a lot of people continue to use their personal account.

It violates a number of policies and is probably a firing offense, but I haven't heard of anyone getting nailed for it yet. And I know that line managers are aware of it happening.

I do wish they'd just let us buy Claude Code API access. Copilot w/Opus 5.5 is noticably worse than CC using the same model. But oh well, I'm not getting fired over it.

If you have 150 people with Claude acess you probably have enough of a need for compliance and audit trails to put the kibosh on that.

Data protection guarantees. This is especially true if you need zero data retention, which isn't available on individual subscriptions.

This is ok when you're a startup and don't give a shit, Goldman Sachs, McKinsey, Accenture, won't do that, 12 people in their legal, support, security and billing departments died of an heart attack reading your comment

Basic security and governance?

IP and trade secret protection?

Because the enterprise plan provides necessary features, contract terms and vendor assurances to comply with local law, industry regulations, customer contracts, and company AI and security policies?

Besides all the other reasons, I have a strong feeling that Anthropic went to the Oracle School of License Enforcement and they seem like the type of company that would be willing to sue their customers into oblivion. Maybe not now, before the IPO, but afterwards, for sure.

Anthropic figuring that out? People not wanting to incur business expenses on their personal accounts? In what world is that a realistic scenario for a large organization??