Except that AWS and Google have their own offerings (and the I think these aren't SSO companies as much as Auth as a Service providers)

Azure AD is the biggest in the game by far in terms of SSO, stretching every vertical from education to investment banking.

Azure AD B2C for customer IAM is lagging way behind Okta/Auth0 etc. Sure AAD is great enterprise users or B2B but millions of customer login, branding, app experience B2C sucks.

...only because of Office 365 though.

If Cognito is the AWS offering you're talking about then it doesn't even begin to compete. It's really a terrible product and AWS has misled us about the roadmap multiple times specifically in relation to multi-region support.

When AWS Cognito had it's outage in November, I was quite happy we went with Okta.

I'm unimpressed with it as well, but I suspect antitrust officials have a different definition of "competition" than we do.

In a way I think this is good for consumers as it positions them better to counterbalance Microsoft, the big bear in the field.

I'd think so, but in the US antitrust isn't really much of a thing. I wonder if they have grown large enough in Europe yet...

I'm curious why you think anti-trust isn't a thing in the US...

What do you think of the break-up of Bell Systems? https://en.wikipedia.org/wiki/Breakup_of_the_Bell_System

There are also active anti-trust investigations into Google and Facebook.

https://www.cnn.com/2020/12/17/tech/google-antitrust-lawsuit... https://www.forbes.com/advisor/investing/facebook-antitrust-...

I think tpmx means antitrust isn't currently much of a thing in the US, and I agree. Today's antitrust environment is a far cry from even the days of Bell.

Biggest but not a monopoly. There are numerous competitors from open-source to managed versions.

Every major cloud also has an auth/identity product and collectively probably have more total customers at this point.

A little, but I don't even think they're the biggest.

Disney bought Fox and Amazon both sells 1st party and 3rd party goods. So I’d say no.