How do I do research on which companies to help in europe as growth hacker?

There are two ways to look at this. (1) Find amazing startups that have some funding behind them and are growing quickly or (2) find startups that are struggling with growth and often as a result are not funded.

Their are pros and cons to both. If you are extremely confident in your skill set then working with a struggling startup can really give you an environment to prove your skills. However, make sure you find a startup that has an incredible founding team and product. You will not have much impact growing a sub-par product. If your not as confident and are just beginning to get your feet wet you may want to join a startup that is growing like crazing and has an insane mastermind fueling the companies growth. This environment will allow you to learn from the master and become great.

**How to find these startups: **

Use tools like Mattermark, Crunchbase, and AngelList. Search for companies and find the ones that are just beginning to break out. Mattermark has a trial where you can develop your targeted list. Use filters to limit your search for startups within Europe or whatever metro city area are in. Continue to refine your search with filters for funding, industry, and stage. Then sort by Mattermark growth score. Due to the filtering Mattermark will be the one of the best methods for finding these startups.

For AngelList just start searching and see what startups are getting featured. The jobs search feature will help a lot. Many startups are using AngelList as a primary place to source talent.

Best of luck I hope this helps.