From reading the linked article it seems fairly easy to use. Do you have some concrete examples why your solution would be "lighter"? I'd actually say it's heavier since you have to pay and end up in a "custom pricing scheme" (whatever that means) for 10k+ users as it says on your website. And it's also only available as a cloud service, with all the vendor lock in shenanigans everyone hates.

By the way people usually disclaim upfront on HN (see FusionAuth folks here) when they are involved in a project. Seems like you are the "CTO at Clerk". Frankly it's dishonest to talk bad about open source without claims to back it up while also being in a competitive space and plugging your solution in their "Show HN" moment.

tl;dr no thanks I'll look somewhere else...