substack.com
Collect testimonials on Substack
Substack About pages convert free readers to paid subscribers. Native testimonials are limited to a static quote block. Trustfolio adds a dynamic, AI-scored testimonial wall — embedded via Substack's custom HTML.
Why Substack users pick Trustfolio
Paid Substack writers use About pages to pitch the paid tier. Trustfolio shows 5+ paying-subscriber quotes with conversion-score ranking.
Substack is optimized for email-first flows. Trustfolio adds minimal page weight on About pages.
Setup in under 2 minutes
- 1Note: Substack allows limited custom HTML — check plan eligibility.
- 2In your Substack About page, use an Embed block.
- 3Paste the Trustfolio widget URL (iframe embed).
- 4Publish.
<div data-trustfolio="YOUR_WIDGET_ID"></div>
<script src="https://trustfolio.dev/embed.js" async></script>Frequently asked
Can I put it in Substack posts themselves?
Posts have limited HTML support. Best used on About / Landing pages.
Will it survive Substack's email-to-post translation?
No — emails strip scripts. Web-only.
Does Substack's free plan allow custom embeds?
Limited. Paid plans give more flexibility.
Can I collect testimonials from existing subscribers?
Yes — send the Trustfolio collection link via a normal Substack email.
Does it work with Substack custom domains?
Yes.
Try Trustfolio on Substack
Free plan includes 15 testimonials, basic AI scoring, and the same sub-5KB widget. No credit card.
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