Do logos matter as a startup?
An overview on early stage startup logos
No.
The branding and logos of most startups evolve and change as they figure out who their customers are and what image they want to present.
Instead of focusing on a logo, focus on validating your product and acquiring customers. You can allocate design resources into branding and UI once you have customers.
Do not block yourself by not having a logo.
A quick way around logo block is to start with an all text logo of your business name.