I'm biased since I built this, but the things I'd look at: how memories are stored (flat text vs typed), what happens when info conflicts (does it detect contradictions or just store both), and whether it runs locally or cloud only.

My take is that pure memory is just one piece. What I'm really trying to build is a cognitive engine. Typed memories, contradiction detection, pain signals when you're about to repeat a mistake, decay and reinforcement. Less "store and retrieve" and more how memory actually works.

There's an interactive demo at https://demo.mentedb.com if you want to see it in action.