[Jetpack contact form] how to deal with spam?

I am using Jetpack Contact Form on my wordpress site. I am getting a lot of spam messages. I empty my spam queue last night and this morning I have 3000+ message on the queue. Akismet is able to catch most of them, but it misses 10-20 from time to time, and I had to go thru each message to ensure there is nothing legit there before deleting.

Is there a way to stop this? I don’t see an option install a catcha on the Jetpack contact form. What contact form plugin would you recommend instead?