I just built a system that sends login request codes and I've never heard of them either.

Honest question: is this an example of "fake it til you make it"?

Nope, 600M in ARR, message bird is huge

As a former Twilio employee, this is what we used to say, especially back when I started in 2011 when there really weren't many other options, and most of the few other options were not easy to get started on as a solo developer.

I think it's reasonable to say that if you do all of those quoted things, probably some of the texts you've gotten have gone through MessageBird, but certainly not all of them.

Then again, the wording of that is ambiguous enough.. that's what it could have meant, even though it's worded to sound more expansive.

It's not the only ambiguous wording in the post; the math doesn't add up here. It's probably a peak of 254 million/hr.

"during Black Friday processed a whopping 254 million emails every hour and 3.3 billion during the day"

Bigger in the EU

They own Pusher which you might have heard of.

They purchased Spark Post / Message Systems last year, which at one point handled mail for Facebook and a bunch of other big companies.

I mean, if you've ever bought anything in a shop with a credit or debit card, your interactions have probably been powered by EMVCo's stuff, but you've probably never heard of EMVCo and there's no particularly good reason that most people should have. In general, there's not much point in B2B infrastructure providers doing consumer marketing.