I've been evaluating both (kysely, drizzle), and I'm leaning towards Kysely. Drizzle is the latest, but both are moving fast if you look at the git insights. I find Kysely more enjoyable and straightforward -- intellisense autocompletions work better (for me at least), and the expression builder combined w/ helper methods like jsonArrayFrom offer a lot of flexibility over how to shape the output, so you're in full control, which is one of the reasons I wanted to explore alternatives to primsa in the first place. I had actually decided on kysely, but am taking another look at drizzle because of recent support for relations added. The added support is a nice addition, but there's boilerplate one needs to write to take advantage of and, frankly, I just find it easier to get same results w/ kysely, again, w/ added flexibility (it is not trying be be an orm). Some things I really like about drizzle are not needing to generate schema and lets you map column names (e.g., created_at db col maps to createAt object name). Drizzle can also infer types from schema, but, I haven''t found this to be a bit pro relative to kysely because 1) it takes very little effort to build a zod schema that "satisifies" the kysely's type definitions and 2) I'm typically overriding the drizzle infered types anyway to get the finally runtime checks implemented (e.g., is a cuid2 of 16 len, not just is a string). I've also been using prisma-kysely, which gives me ubiquitously supported prisma tooling for handling migrations, etc.