As Julia Lam mentioned, DocSend will give you the following info:
You can also update your deck after you send it out, and turn off access for individual people at any time. DocSend is primarily a sales tool, but it's a great fit for fundraising. You upload your document to DocSend, and then you email out a unique link to your deck each time you send it.
You can create free accounts here: https://docsend.com/