Apart from Kagi are there anyone else using Crystal in production?

A "used in production" page but unsure when this was last updated. https://crystal-lang.org/used_in_prod/

Notes in this release also mention https://www.84codes.com as having contributed to multi-threading support project.

Using Crystal with Kemal extensively at our platform: Açık Türkiye https://acikturkiye.com/