Proof sources
Bring proof from anywhere — honestly
Castio turns proof into curated website proof walls. Here's exactly what's automated today versus what you add manually. No fake integrations.
Available now — automated
Connect a feed and import recent items on demand. You approve every item before it appears on a wall.
RSS / Atom
Import recent items from any RSS or Atom feed automatically.
YouTube
Import recent public videos from a channel via its public feed — no OAuth.
Manual import supported now
Add, paste or organise proof from these sources today. Automated connectors for the social networks are on the roadmap — we won’t pretend they’re live until they are.
Testimonials
Add testimonials you collected by hand.
Customer emails
Paste praise straight from customer emails.
Screenshots
Add screenshot proof with an image URL.
UGC
Add user-generated content you have rights to show.
Founder updates
Turn launch and progress updates into proof.
Add an Instagram post manually.
Add a Facebook post manually.
X / Twitter
Add a post from X manually.
Add a LinkedIn post manually.
TikTok
Add a TikTok manually.
Add a Reddit comment or post manually.
Google Reviews
Add a Google review manually.
Slack
Add praise from a Slack message manually.
Tumblr
Add a Tumblr post manually.
Vimeo
Add a Vimeo video manually.
Behance
Add Behance feedback manually.
Yelp
Add a Yelp review manually.
Flickr
Add Flickr proof manually.
DeviantArt
Add DeviantArt feedback manually.
Automated social connectors — coming soon
Direct, automated syncing for Instagram, Facebook, X / Twitter, LinkedIn, TikTok and others is on the roadmap. Until each one is built and tested, those sources are clearly labelled “Manual import now” — you can still add that proof today, by hand.
Start free today
Turn your proof into a conversion asset
Build a curated proof wall and embed it anywhere. Free to start — no social logins, live in five minutes.
- No credit card
- No account connections required
- Live in 5 minutes
13
proof types
2
layouts live
1 line
to embed
5 min
to publish