Based on our record, Simbi seems to be more popular. It has been mentiond 1 time 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.
Personally, I just hired some one on Simbi, which is in essence is a barter economy. So I didn't even spend USD on it. It was nice as someone on a shoe-string budget. Ref link Non ref. Source: almost 3 years ago
upcoach - The platform to scale your group, cohort, or 1-on-1 coaching
Gratify (Open Beta) - Hire experts on-demand via Slack.
Tribe of Mentors - Short life advice from the best in the world, by Tim Ferriss
Higherme - Platform for hiring hourly employees (YC W15)
MentSpot - Find a mentor or become one for free
BuyerBot Slack Bot - Amazon purchasing for Slack teams