Top alternatives in detail
Independent users treat Cal.com as the free or cheap Calendly alternative: the free tier covers most of what solo users need, it syncs several Google and Outlook calendars without double booking, and several users prefer it to Calendly. The trade-offs are setup effort, since its flexibility takes more configuration than people expect, and costs for advanced needs such as OIDC or enterprise features, plus isolated reports of O365 busy-status sync failing and reminder emails not landing. About a quarter of the Reddit mentions are promotional, mostly self-promotion posts that carry the poster's own cal.com booking link or plug another product.
Independent users like Calendly for what it was built for: ending the back-and-forth of finding a meeting time, which several small business owners and freelancers say saves them hours a week, and some use paid bookings through Stripe to filter out time-wasters. The pushback comes from two directions. Salespeople argue that sending a booking link to a prospect hurts replies compared with sending a calendar invite, one team saw it in an A/B test, and one enterprise account owner running 50 hosts describes it as buggy, inflexible, poorly supported and expensive. Most of the 100 Reddit mentions only name it in passing, and about 15 were promotional, so this rests on about 25 real opinions.
Independent users treat Chili Piper as the tool for complex inbound routing: weighted round robin, territories and routing straight to the account owner, with form-to-meeting booking in one step. The trade-off is cost and complexity, as users call it pricey or overpriced and overkill for flat teams or simple booking, and a few report no-show, spam-booking and traffic-source tracking problems. About a third of the Reddit mentions read as promotional, including a run of near-identical comments plugging Pulse for Reddit and small clusters pushing meetergo, LeadAngel, Default and Knock, so this rests on roughly 14 independent opinions.