Congrats on the launch! Looks interesting.
I found some of your comments a bit strange though... are you suggesting that any of those other tools host your secrets in plain text? I never used EnvKey, but what's crazy about their desktop GUI?
I'm obviously biased, but for our own use, I created a small open-source wrapper called envwarden[0] that uses Bitwarden to manage our server secrets. I trust Bitwarden already with plenty sensitive stuff and I'm sure it's not stored in plaintext anywhere. The GUIs aren't crazy but rather simple. They have browser add-ons, mobile apps, desktop apps, plus CLI that envwarden interfaces with...
Not affiliated with Bitwarden in any way. Just happy customers and also happy to create a simple way to manage your server secrets with it.