Someone on HN sent me a cold email recently asking me to help beta test their web app.  They&#x27;d found me via a comment where I&#x27;d mentioned using a competitor&#x27;s app, and wanted my opinion &#x2F; feedback on their own app.<p>What they did right is that the first email wasn&#x27;t a sales pitch, just asking for feedback &#x2F; opinions &#x2F; bug reports.  What didn&#x27;t go well is that they seemed rather defensive about my negative feedback.  If you do get negative feedback, remember it might be specific to that person&#x27;s situation - the same app might be perfect for someone else, and you can use the feedback to identify who is &amp; isn&#x27;t your target market.