Integration of google form with Salesforce

Zapier is lovely, but it is not the only fish in the sea. You can use Google Apps Script to push data directly into Salesforce through the API. It takes a little coding, but there is no additional platform cost. Another option is a simple Web to Lead form if you only need basic data capture. What I think will be best is testing the script in a sandbox first. The setup can be a little fiddly, but getting it working is quite rewarding.