When you build a product in an established market, it's obvious that many potential customers will already use another similar product.
Make their life easier by offering a seamless migration process for their data.
In that way, you help them worry less about shifting to your product.
Also, you introduce a direct communication channel with your customer which builds trust for your business and leads to better customer service.

Leverage Social Proof
Social proof is your most powerful asset. You build credibility & encourage acceptance of your product. As humans, we tend to follow the

Upgrade The Login Screen
Leverage your login to showcase your product's core value.

Leverage Branding
Leverage your branding to spice up your common (boring) interactions like feature announcements.
