You sent the deck on Tuesday. It's Thursday. Did the partner open it? Skim it? Forward it? Most founders are guessing. HTMLRadar replaces the guessing with a live dashboard: who opened your deck, which slides they read, how long they stayed on the ask.
Ways to see who read your deck
Give each investor their own link, and you get an e-mail at the first read and see the time on each slide. Here is what each way shows, and what it cannot.
| Way | What it shows, and what it cannot |
|---|---|
| E-mail open tracking | A tracking image tells you the e-mail was opened, never that the deck was. With Mail Privacy Protection switched on, Apple Mail stops senders seeing whether an e-mail was opened, and the protection does not extend to links or attachments. |
| Google Slides view history | The Activity dashboard lists signed-in people who viewed the deck, but only when the file is owned by a work or school account, and each viewer can switch their view history off. |
| A deck service built for PDFs, such as DocSend or Digify | DocSend lists document-level analytics from its Personal plan, and Digify lists page-by-page tracking, both for files you upload to them. Digify’s list of supported formats does not name HTML. |
| An HTMLRadar link for each investor | Upload the deck as HTML, or turn a PDF deck into a web page, then make one link per investor. You get an e-mail at the first read, then see the time on each slide, how far they scrolled and whether they came back. |
Read on 4 November 2026: Apple’s page on Mail Privacy Protection, Google’s page on the Activity dashboard, DocSend’s pricing page and Digify’s pricing page. HTMLRadar set against each: DocSend and Digify.
How do you know when an investor opens your deck?
HTMLRadar waits five seconds after the document loads before it creates a session, so a link preview or a two-second mis-click never counts as a read. That first real read is what e-mails you: one e-mail per reader per document, so a partner who opens the deck again on Sunday does not e-mail you again.
Which slides did they actually read?
An open tells you nothing about conviction; the time on each slide does. A partner who spent four minutes on Traction and none on The ask needs a different note from one whose longest read was The ask.
One link per investor
Each link can have an e-mail gate, a password, an expiry date, a list of allowed domains and a download lock, and a switch that turns it off the moment the round closes or the conversation goes cold.
When should you follow up?
When the data says so. A partner who opened your deck three times and re-read Traction is warm: follow up the same day, and lead with traction. A partner who hasn't opened it in a week needs a different note entirely. The dashboard tells you which email to write.