Appointment Scheduling Software Market Share & Usage Statistics (2026)
Calendly runs on 158,003 live websites, 62.6% of the 252,249 sites we detect using appointment scheduling software. Below, all 100 tools we detect in this category, ranked by live websites, with market share and 30-day adoption momentum.
Data updated Aug 19, 2026
- #1
Calendly
Calendly is a scheduling automation platform founded in 2013 that lets businesses and individuals share booking links for appointments, meetings, and events.
Live websites158,003Market Share62.56%Top CountryUnited States - #2
FareHarbor
FareHarbor is booking software for tour, activity and rental operators.
Live websites11,684Market Share4.63%Top CountryUnited States - #3
Acuity Scheduling
Acuity Scheduling is online appointment booking software that Squarespace has owned since 2019.
Live websites3,618Market Share1.43%Top CountryUnited States 
Housecall Pro
Housecall Pro is field service software for home service businesses such as HVAC, plumbing, electrical and cleaning companies.
Live websites2,657Market Share1.05%Top CountryUnited States
Mindbody
Mindbody is booking and business software for fitness studios, gyms, spas and wellness businesses, owned by Playlist alongside ClassPass and Booker.
Live websites2,534Market Share1%Top CountryUnited States
Appointment Scheduling Market Data
Adoption and 30-day momentum across 100 appointment scheduling technologies, measured from our live detection crawl.
Biggest Movers
Expert Insight: Appointment Scheduling Software Market Share & Momentum
Calendly is about 63% of the category, and the rest of the table is a different product.
Calendly runs on roughly 158,000 of the 252,000 live sites where we detect a scheduling tool, about 63%, and the top five hold around 76%. Below that the table stops being a ranking of competitors: 89 of the 100 tools we track sit under 1% each, and most of them are vertical booking systems that a business would never evaluate against Calendly.
One horizontal tool and a long vertical tail
Calendly holds about 63% of detected sites. The next four are Bookly at roughly 6%, FareHarbor at about 5%, and BookThatApp and Appointo at under 2% each. That gap is not a competitive one. Calendly books meetings for anyone; FareHarbor books tour operators, and Bookly and BookThatApp are store plugins. The category leader and its runners-up are solving different problems.
The biggest gainer is a detection onset
Cal.com shows the largest 90-day gain in the category at roughly 3,800 domains, which is essentially its entire footprint here, so read it as the tool entering our detection set rather than spreading. Vetstoria, Simple Booking and RevenueHero repeat the pattern. Once those are set aside the clearest genuine gain belongs to Calendly itself at about 3,400 domains, which is an unusual thing for a category leader at this share to still be doing.
A monthly dip that the quarter does not support
Calendly is down roughly 1,500 domains across the latest 30 days but up about 3,400 across 90, so the short window is turnover rather than direction. The consistent losers are the store plugins: Bookly, BookThatApp and Acuity Scheduling are each down a hundred or so domains on both windows. Dropped here means the booking widget stopped appearing in our crawl, which on a storefront plugin often means the store closed or changed theme.
Split the table before you size the market
Two businesses share this category. General-purpose meeting schedulers (Calendly, Cal.com, Acuity) sell a link that finds a free slot, usually per seat and often to an individual. Vertical booking systems (FareHarbor for tours, Zocdoc for clinics, Housecall Pro for home services, Mindbody for studios) sell an operations product with payments, staff rosters and inventory attached, priced per location. A ranking that puts them in one column overstates how contested the top of the table is.
Market Share
- Calendly62.56%
Bookly5.59%- FareHarbor4.63%
BookThatApp1.71%
Appointo1.67%
GetYourGuide1.67%- …Others22.2%
Appointment Scheduling
FAQ.
What is Appointment Scheduling software?
Appointment Scheduling covers the tools a site can load or configure to handle this part of its stack. We detect one of the 100 appointment scheduling tools in this category on 252,249 live sites. A detection means we found the technology on the site, which is not the same as a paid account.
What are the most popular appointment scheduling platforms?
Across 252,249 detected sites, the most widely found appointment scheduling tools are: Calendly (62.56% share, 158,003 sites), Bookly (5.59% share, 14,105 sites), FareHarbor (4.63% share, 11,684 sites). Others we see regularly include BookThatApp and Appointo.
Which appointment scheduling tool has the largest market share?
Calendly is the most widely detected appointment scheduling tool at 62.56% share, on 158,003 sites. The largest share of those sites belongs to Business Consulting and Services companies, and to businesses in the 1-10 employee band.
Which industries use appointment scheduling software the most?
The industries with the most detected sites in this category are Business Consulting and Services, Professional Training and Coaching, IT Services and IT Consulting, Software Development, Advertising Services. Industry mix follows where these tools get installed, so a category carried by website builders or agency templates will lean toward the verticals those platforms serve rather than the vendor's target buyer.
Which countries have the highest adoption of appointment scheduling tools?
We detect the most appointment scheduling sites in United States, United Kingdom, Germany, France, Canada. Country here is the company's registered location in our enriched data rather than where the site is served from, so read it as a ranking of markets rather than a measure of any single one.
How do I choose the right appointment scheduling platform?
Start from your own size, industry and primary use case rather than from share. Calendly, Bookly and FareHarbor are the three we detect most often in this category, which tells you what is common, not what fits you. Compare their integrations, pricing tiers and support commitments against the workflow you actually run, and check each vendor's own documentation for current capabilities.
How many companies use appointment scheduling software?
TechnologyChecker.io detects appointment scheduling tools on 252,249 live sites. That is a count of sites carrying the technology, not a count of paying customers, and a site running two tools in this category is counted under each. We crawl 2 billion+ URLs across 29.9M live business domains each sweep.
What is the source of this data?
TechnologyChecker.io's web crawling and technology detection platform. We've logged 2.12 billion total detections over 20+ years, covering 40,000+ technologies across the 29.9M live business domains we successfully crawl each sweep. Detection methods include JavaScript analysis, HTTP headers, HTML patterns, DNS records, and certificate transparency logs.