You can see a break-down of the core team and major contributors here, as well as their current company affiliation: https://www.postgresql.org/community/contri

You can see a break-down of the core team and major contributors here, as well as their current company affiliation: https://www.postgresql.org/community/contributors/ https://www.postgresql.org/community/contributors/ (and as noted in the other comment, whilst EDB certainly makes important contributions, they are one of many)