Woobox might be a bit more popular than Proof. We know about 1 link to it since March 2021 and only 1 link to Proof. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I've used https://useproof.com/ before, and it worked really well, and increased conversions about 8%. Source: over 2 years ago
I've used woobox among others to run sweepstakes on social and you can absolutely track comments, shares, likes, follows etc. Source: over 1 year ago
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