It is intended to be Middleman-friendly with no iframes, JavaScript embeds, or CSS overrides.
It just generates a URL to use as your form’s action endpoint.
It has a very simple webhook system,
which means it can automatically forward all submissions to a webhook of your choosing.
We’ve been using Zapier to handle the heavy lifting of
sending form data along from FormKeep to MailChimp, Trello, etc.
You can see FormKeep in action on our Middleman-generated blog,
which incidentally has over 1 million visitors/year
(thank you Middleman and Fastly for making the traffic super-easy to handle!).
We use FormKeep’s webhooks to send folks who subscribe to the form
(and who pass FormKeep’s spam-checking filter)
into a HubSpot email list, and then surprise them with an email confirmation that includes
a PDF, MOBI, and EPUB version of our playbook
(which is another static site that uses FormKeep).