I’ve used knowde a bunch and there are things I like about it. The search display is better than UL Prospector and the search process seems a bit more user friendly.
However, their algorithms are a bit dumb and give erroneous information. For example, I do a search for “preservatives” and it gives back examples like…
Neolipid™ SC Biobarrier - not a preservative
STEOL® CA-460 - (ammonium lauryl sulfate) - not a preservative
And these are on the first page. If you go to the next page you just find a bunch of surfactants that no one who is looking for a preservative would ever use as a preservative.
The same thing happens with other searches. It’s just a dumb search engine which needs to be smarter to make it useful.