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he0001

What more db’s are based on Postgres?

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Greenplum

Hadapt

Netezza

PipelineDb

Postgres-XL

Redshift

AgensGraph

TimescaleDB

Fujitsu Enterprise Postgres

PolarDB

CrunchyBridge

A quick note on Crunchy Bridge, it is pure Postgres, not "based" on Postgres. We haven't forked or modified code at all. And some of the above (Timescale) are extensions which do not change Postgres, but hook into the extension APIs.

Yes this is an important distinction between and extension for Postgres vs a fork of.

The short-sightedness of forking boggles my mind every time. Oh, you don't want a team of hundreds of literally the best Postgres programmers in the world working for you full time all the time for free? Ok dude, have fun with your fork.

Forking also happens because of the license.

Yugabyte

It has an API compatible with the postgresql wire protocol, but I don't think it fits in with the list since it doesn't share any code.

Yugabyte lifts the complete top query layer from Postgres and swaps the back end for RAFT per table. It definitely qualifies.

I think "based on" is more like implemented on top of, similar to timescaledb

EdgeDB

Looks like EdgeDB hasn't done enough marketing. No one has mentioned EdgeDB except you. Well we're (I love EdgeDB) still in beta.

Greenplum, Postgres-XL and PipelineDB.

I'm still really upset that confluence bought and ruined pipeline db. It solved my problem perfectly and I haven't seen one yet that fits what I needed as well.

What about http://materialize.com/ ?

Looks to me like an acquihire of a team that would otherwise (probably) have ended up winding up the company, sadly.

TimescaleDB.

Yellowbrick

Cockroachdb

No, this one's built from scratch in Go and based off LevelDB/RocksDB. They support Postgres wire protocol, but not based off any Postgres code.

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