Hey {First Name},
As I browsed over your website, I saw that you were using a {competitor's product}. How have things gone thus far for you?
I am {Your Name} and I am a Product Manager at [Product 5X].
Our {product} is a lot similar to {your competitor’s product}. One of the key differences is {add key USP and differentiators}.
We feel these features might work better for {client company name} as {explain why}.
Let's have a little conversation to see if we can persuade you to use our services instead.
We promise to make it worth your while!
Regards,
{Your Name}