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Amazon does this. Most other tech companies do not (eg pretty much any other FAANG).

Nor any other non-FAANG company I've ever worked for. In my experience, 401k matches are immediate.

EMC had a three year 401k match vest schedule in the 2010s. I think they’re on immediate like everyone else now, but don’t remember.

This article (citing a registration-wall report) says only 28% of employees offer immediate vesting on employer matches.