You do not need a developer or a heavy platform to add social proof to your website. You need a curated wall and a simple embed.
Castio gives you both: build a proof wall in the dashboard, publish it, and paste one iframe snippet wherever you want it to appear.
A real Castio wall
Maya Patel
Head of Ops · Northwind Labs
We replaced three tools with this in a week. Onboarding was the smoothest I've seen in years.
Internal dashboard
Activation up 34%
New-user activation jumped 34% in the first month after switching.
Dev Okonkwo
@devbuilds
Okay this just became my favorite launch of the quarter. Clean, fast, does exactly what it says.
Tara Lindqvist
Founder · Cadence
★★★★★Worth every minute saved
Set up our first proof wall in under five minutes and embedded it on our pricing page same day.
Powered by Castio
Works with the tools you already use
Because the embed is a standard iframe, it works almost everywhere — custom sites, popular CMSs and no-code builders that accept embed code.
- ✓Paste into any HTML or embed block
- ✓Responsive width by default
- ✓Only approved cards from published walls render
- ✓Update the wall and the embed updates with it
Keep it on-brand
Set a light or dark theme, accent color, spacing and radius so the widget feels native to the page rather than bolted on.
Three steps to live
Create a wall, approve your proof cards, then copy the embed from the wall's Embed tab. That is it — your social proof widget is live.
Frequently asked questions
How do I add a social proof widget to my website?+
Build a proof wall in Castio, publish it, and paste the generated iframe snippet into your site's HTML or an embed block.
Will it slow my site down?+
The embed loads lazily and renders a lightweight wall, so impact on your page is minimal.
Can I update the widget after embedding?+
Yes. Edit the wall in Castio and the embed reflects your changes automatically.
Does it work on no-code builders?+
Yes, anywhere that accepts an iframe or embed code.