[misframer]

> It was the only NoSQL K/V store (at the time) that had transactions.

What about FoundationDB?

[lobster_johnson]

Not open source, though.

[misframer]

Warp wasn't open source either.

[lobster_johnson]

Good point, but at least you could try out Hyperdex and consider whether you wanted transactions. But this is pretty moot at this point, unless someone picks up Hyperdex development again.