Find videos from conferences with technologies you are interested in. Watch any / all talks from that conference. Take note of company behind each interesting t

Find videos from conferences with technologies you are interested in. Watch any / all talks from that conference. Take note of company behind each interesting talk. If you follow some of these companies on sites like linkedin, keep an eye on other companies you haven't heard of in their 'people also followed' section. (companies that everyone has followed you likely already know about)