Discord and Pinterest use Elixir at a massive scale. Discord in particular has been writing a great technical blog about the process.

On a smaller scale Feedback Panda very successfully bootstrapped to a 55k MRR SaaS and was aquired in under 2 years: https://youtu.be/vaXp81OxxK0

Edit: Not to be too self-promotional, but AFIK I've created more free Elixir-learning screencasts than anyone on YouTube. I cover a pretty broad range of topics from total beginner to some fairly niche things: https://youtu.be/z1nKbzZiRtY

The Elixir video courses at https://pragmaticstudio.com/ are the best available, in my opinion. There are some free tutorials available and some other good paid courses, to be sure, but I think Mike and Nicole over at Pragmatic Studio offer the most complete and easy-to-follow courses available. The cost-to-value ratio of their courses is really good, I think.

I'm not affiliated with them in any way. I'm just a happy customer.

> What major sites are currently using Elixir?

Besides what was listed already, if you're looking for info on people running Elixir / Phoenix in production there's this podcast: https://runninginproduction.com/tags/phoenix

One guy was pumping over 7 billion log events a month through it.

Another one (remote.com episode) serves 100k+ daily requests.

Each podcast episode goes through how the app was built and how it's deployed at a high level, but still has enough details to apply those things back to your own projects.

With that said, if anyone is running Elixir or Phoenix in production and sees this and wants to be on the show, just head over to the above link and click "become a guest" on the top right. I'd love to have you on, both big and small sites are welcome.

> any good tutorials?

https://elixir-lang.org/learning.html - Start here. It starts off kind of abstract, and then works its way into the concrete (from my experience) -- but is very easy to pick up.

> What major sites?

Last I heard, Discord was serving ~5 million concurrent users, and that was well before compelled isolation.

Bleacher Report is also using Elixir, and serving something like 100k requests per minute just to mobile clients.

Bet365 handles as much as 100k monetary transactions during a big sporting event like a Champions League final.

I heard Divvy, Brex, Slab, and PagerDuty use elixir, so if you're a bay area startup, there's a good chance you're already using elixir as part of your business stack.