B2B SAAS Software - best prospecting methods?

Hi, B2B SAAS owner here (furniture manufacturing tool).

I've been trying different methods to prospect for new customers / user interviews. Tried mass emails using tools like Apollo but the reply rate was very low. Also tried cold calling and the response was better but it was very time consuming. LinkedIn for me was the sweet spot between the two.

Wondering how other B2B SAAS owners do prospecting and what worked best for you?