Make the header's height larger. It's very, unusually small, compared to the vast majority of the internet. At least add some top/bottom padding.
Please work on the contrast of the "Start Free Trial" buttons, they are hard to read.
Use or configure your header/menu font better. On chrome, windows 10 it's ugly: https://i.imgur.com/FpsHTkX.png
Add some effect to the screenshot, so people it's a screenshot of the app and not some random image.
Add some color to the references slider's arrows. No contrast there.
The pricing buttons being different is weird: https://i.imgur.com/qJI9cPw.png
Fix the legends being blurry in this screenshot: https://cloudforecast.io/images/CloudForecast-email---as-of-...
Change the "Contact Us" links to an actual page, showing the email, and a mailto handler there. I really dislike how it is right now (link with mailto handler), as I may not be interested to email right away. Maybe I'm looking for where you guys are HQ'd?
--- on app.cloudforecast.io
2005 called, they want their button borders back: https://i.imgur.com/eSitJwC.png
A text with "I accept the Terms" is not consent.
There is no Data Usage/GDPR info linked on the signup screen. How is my data used?
Maybe use some different typeface for these progress labels? They look bland, boring, and I only saw them at the third look. https://i.imgur.com/qcoAuHs.png