Incubators, Science Parks, Accelerators, Venture Builders, Business Angels, Venture Capital, Corporate Venture Capital, and to conclude (big) corporations.
Each of these actors can play an important role in the development of a Deep-Tech startups, but most of the time it is difficult for founders to understand whether these actors are offering you something really helpful for the stage navigating in that precise moment of time.
When you should engage with them
What you should be looking for to get the most out the engagement with that player
Pros and cons respect to engaging with other actors.
Each of these actors, in fact, can be distinghished by the activities that carries out.