New eSIM provider I just came across - Saily

Prices look a little lower than Airalo at least for the few countries I checked, but what makes them interesting is that they are owned by Nord Security (of Nord VPN fame). I don't actually know if that's a good thing or not, but they are probably the first major eSIM company that's owned by a large company (outside of telcos themselves).

They seem to have a "single eSIM" model ("Add new destinations to your existing Saily eSIM — no new eSIMs needed.") - not sure if that's an indication that they are routing all traffic back to a single country, or if that eSIM supports multiple home providers. Downside seems to be that they don't seem to have any regional plans - if you're hitting up 3 countries in the EU, it appears you'll need to pay for each country individually rather than having roaming between them.

If anyone uses them please report back - I'd love to know what they are like!