Calendly
Calendly launched in 2013 and pioneered modern meeting scheduling for B2B operators. The product philosophy centers on universal scheduling: every user has a booking link, round-robin distributes meetings, routing forms qualify and route, and integrations sync to CRMs. Calendly serves anyone with meetings to schedule — sales, customer success, recruiting, executives, support — not specifically optimized for any single use case.
In 2026 Calendly serves approximately 20 million users including substantial enterprise penetration. The strengths are the broadest team scheduling capabilities, mature CRM integrations (Salesforce, HubSpot, Pipedrive, Outreach, Salesloft), polished UX that's become the de facto B2B scheduling standard, and a free tier that drives massive adoption. The weakness is high-velocity inbound conversion — Calendly's scheduling flow is designed for "schedule a meeting later," not "instantly convert a demo request to a booked meeting before the lead loses interest."