Late answer but still... Companies providing products for other tech companies, popular examples are places like Redhat, Canonical or many Telcos. Recently I've

Late answer but still... Companies providing products for other tech companies, popular examples are places like Redhat, Canonical or many Telcos. Recently I've also seen a number of companies in the recycling/upcycling space. Also there are tons of small companies that are not startups, it's possible to find them on websites of local technology hubs.