Which companies have regular hackathons scheduled multiple times per year?

How sustainable is it?

Building openrouter.ai, prev: co-founder of OpenSea. alexatallah.com

I know coda does. it's brilliant how they do it

The only problem is externality pricing.

Building https://negationgame.com

they have quarterly hackathons judged by members of the community (users, investors, etc)

employees are strongly encouraged to participate but it's not required

it's a week long build and then a demo day

it's been the primary source of their major innovations and creative ideas