Based on our record, Yac seems to be more popular. It has been mentiond 2 times since March 2021. 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.
Take a look at Yac: https://yac.com/. Seems like what they were built for. In fact one of their YouTube videos even covers asynchronous meetings via audio. Source: almost 3 years ago
I’ll plug my own app and say I’d love for you to try out Yac! Source: about 3 years ago
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VocalBird - Record and share audio messages within Chrome
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Slack - A messaging app for teams who see through the Earth!
Talko - Live & asynchronous voice communications on mobile