GlossGenius

Short answer: if you just want a safe pick, choose Calendly for business meetings/sales calls, Acuity Scheduling for service appointments with forms/payments/packages, or Square Appointments if you already use Square POS/payments. Those are the names I’d start with because they’re widely recognized and show up repeatedly in current review/comparison sources. Calendly also had the highest scheduling-app share in the 2026 T3/Inside Information advisor software survey, with 26.88% market share in that niche survey. (t3technologyhub.com)

My practical recommendations

• Best overall for most people: Calendly.
• Best for paid service appointments: Acuity Scheduling.
• Best for salons/local businesses using POS: Square Appointments.
• Best if your company is Microsoft-heavy: Microsoft Bookings.
• Best free/low-cost small-business option: Setmore or Google Calendar Appointment Schedules.
• Best for lots of booking-site features: SimplyBook.me.
• Best for sales teams in a CRM: HubSpot Meetings.
• Best developer/open-source option: Cal.com.

For salons, spas, fitness, and wellness, also look at Vagaro, Fresha, Mindbody, Boulevard, Mangomint, Booksy, and GlossGenius—these are more vertical-specific than generic schedulers and often include POS, client records, memberships, marketing, inventory, or marketplace discovery. Capterra’s 2026 spa-software page highlights Vagaro and Fresha, while industry comparisons commonly group Fresha, Vagaro, Square, Mindbody, Booksy, and similar tools together. (capterra.com)

Bottom line: don’t over-optimize. If you book meetings, use Calendly. If customers book services and pay you, use Acuity or Square Appointments. If you’re in a salon/spa/wellness niche, compare Square, Vagaro, Fresha, Mindbody, and GlossGenius before committing.

Calendly, Acuity Scheduling, Setmore, Square Appointments, and SimplyBook.me stand out as the most popular and widely used appointment scheduling tools, based on market share data, review volume, expert roundups, and user adoption across sources.

These tools help eliminate email back-and-forth by letting clients book directly from your calendar availability, with features like automated reminders, payments, team scheduling, and integrations (e.g., Google Calendar, Outlook, Zoom, CRMs). Popularity varies by use case—general meetings vs. service businesses (salons, clinics, consultants) with payments or custom workflows.

Top Recommendations

Here are the leading options that people actually use, drawn from consistent mentions in 2025–2026 reviews and analyses:

• Calendly — Best overall for most professionals, sales teams, consultants, and recruiters. It excels at simple 1:1 or group meeting scheduling with booking links, round-robin/team options, payments (on higher plans), and strong integrations. It leads in market share (~33% in one analysis) and has thousands of reviews. Free plan available; paid starts around $10/user/month. Widely praised for ease and automation.

• Acuity Scheduling (by Squarespace) — Top choice for service-based businesses needing client intake forms, packages/subscriptions, classes, reminders, and branding. Strong for ease of use and customization like hiding availability. Frequently ranked highly in Zapier, Capterra, and other lists. Starts around $16–20/month. Good for salons, consultants, and healthcare-adjacent services.

• Setmore — Excellent for small teams and service businesses on a budget, with a generous free plan (up to 4 users/200 bookings/month) supporting staff calendars, classes, payments, and a mobile app/POS. Highly customizable with good reviews for value. Paid plans from ~$5/user/month. Often highlighted for solopreneurs and small service ops.

• Square Appointments — Ideal for businesses that need integrated payments and POS (especially retail/service with in-person elements). Free for single-location basic use; paid from ~$49/location/month. Praised for mobile booking and seamless Square ecosystem integration. Strong for small businesses handling both appointments and transactions.

• SimplyBook.me — Strong for international or highly customizable needs, with support for many languages/payment gateways, waiting lists, and modular add-ons. Free tier for low volume; paid from ~$9–12/month. Frequently recommended for businesses wanting branded booking pages and advanced workflows.

Other Notable Options

• YouCanBookMe: Simple and affordable free/paid options for basic calendar-based booking.
• Zoho Bookings: Good if you're already in the Zoho ecosystem (CRM integration).
• Cal.com: Open-source alternative with a generous free tier, appealing for developers or privacy-focused users.
• Doodle or Google Calendar: For group polling or basic built-in scheduling (widely used but less feature-rich for complex bookings).

Industry-specific tools like MINDBODY (wellness/fitness), Jobber (home services), or GlossGenius/SimplePractice (salons/health practices) also see heavy use in their niches.

Quick Tips for Choosing

Consider your needs: general meetings (Calendly), service bookings with forms/payments (Acuity/Setmore/Square), or heavy customization (SimplyBook.me). Check free trials, as most offer them. Look at calendar sync, no-show reduction (reminders), team features, and mobile access. Reviews on Capterra, TrustRadius, and G2 often highlight real-user experiences with reliability and support.

Pricing and features evolve, so verify current details on vendor sites. Calendly and Acuity appear most frequently as go-to solutions across broad user bases.