My steps for rewriting the homepage's copy are:

1. Added 3 options for Slogans that clearly explain what ThunderClap does.

2. Added 2 CTAs to make it clear to tell the potential client to direct them to take action.

3. Above the fold is important, so we can add some authoritative clients' logos below the CTA section to establish us as a credible company.

4. Below the client logo, I've added numbers to give a glimpse of our work so far. I found these numbers on the About Us page.

5. Replaced "Things we can do for you" with "What You Can Expect From Us!". This way, I tried to sound caring by putting "you" before "we."

6. Maintained a friendly and communicative style throughout the page to maintain consistency and engage readers.

Note: I could do better if I had your close competitors' website URLs and a little bit of information about your preferred writing style and tone.

I hope you will like it.