Dockless share bike companies oBike and Reddy Go have agreed to meet with a Sydney council that's threatened to fine operators whose machines are left "strewn" across the city but insist they won't be locking up their bikes as requested.

Bikes have been found up trees, left on the beach, covered in mud and pulled out of water since the companies started operating this year.

An illegally dumped Obike in Sydney's Darling Harbour precinct. Credit:Les Hewitt

oBike marketing head Chethan Rangaswamy says it's counterproductive for a dockless bike company to secure their bikes at docks in a bid to stop them being abandoned or vandalised.

But he says oBike will consider designated parking places for their bikes to be left unlocked.