Growth channels to explore:

- Do people use Google to find the kind of product you're offering?
Try Content Marketing + SEO.

- Do existing users already share your product via word of mouth?
Optimize Virality and Referrals (for example offer rewards for inviting new users).

- Can you make a list of all your potential customers?
Do sales (like calling the companies in your niche).

- Do users have high LTV?
Use paid acquisition (like Facebook ads).