[hamilt0nian]

I like that it catches bots with no need for challenges but, how does it stack up against other Proof of Work solutions?

[juros]

Truesign doesn't use PoW. The bot detection works by collecting network and browser signals.

The PoW solutions I've seen out there just add 1-2 seconds of delay before granting access to the whole site. It could work against random unsophisticaed crawlers but I don't see how that can stop determined bots.