I've seen that database but I don't know how often it's updated. I recently became aware of another (Chinese) esim carrier called RedteaGO. Their rates are shown,($10.99) but they are not current from what the iOS app shows for purchase info. For instance, 1Gb of data good for 30 days in Italy or Spain is $4.99 on the App for purchase. They currently have a promo listed that gives you your first purchase for $1 also. I believe the carrier was Vodaphone, but not positive where I saw that claim. I downloaded the app and it's fairly easy to navigate, listing 42 countries and the prices for their plans. They also have regional plans vs. single country only. In defense of the "esimdb.com" site, the prices shown on RedteaGO's official website are the same as esimdb has posted.

I kinda like the option for a low priced, low data plan that is more than a week or ten days long. It suits the requirement for IMS WiFi/voice calling feature. 1Gb of data will power several hundred minutes of WiFi calling spread out over a month while roaming. 36 Euro countries, 30 days is $6.99 for the 1Gb service, 3Gb=$15.99.

It appears the esim wars have begun!