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Calendar Software with API (2026) - Page 3

Last updated: April 2026

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234 software options

Sage HR logo

Manage and engage your workforce wherever they are

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Who’s off and when? Who’s available? Productivity soars and confusion bids good-bye with the flexible Sage HR calendar.

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RazorSync logo

Cloud and mobile-based field service management software

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Easily schedule technicians by dragging and dropping jobs into time slots. Automate recurring job schedules and integrate your system with Google Calendars.

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Kickserv logo

Field service management software for service professionals

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Kickserv has 4x Unique Calendars. Our powerful calendars and scheduling features can help teams plan for even the most complex schedules.

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ONLYOFFICE Workspace logo

Secure collaborative online office

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ONLYOFFICE Workspace is a secure web office integrated with CRM, document and project management, email, calendar, chat and internal social network, all to organize your teamwork in one place.

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Bookwhen logo

Flexible online booking system for SMBs

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Bookwhen is a flexible online booking system which enables SMBs to organize & process payments for classes, courses, workshops & events quickly & easily

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SuperSaaS logo

Online appointment scheduling software for SMBs

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Flexible & affordable online appointment booking calendar with automated reminders, online payments, customized branding, Google calendar sync and more.

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Commusoft logo

Cloud-based job management software for field service

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Commusoft is a field service management software that streamlines operations for apartments, hotels, and offices. The tool helps manage admin work and provides automation, lead conversion, and profitability insights to drive growth.

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AgendaPro logo

Appointment management software for handling agendas

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AgendaPro is an appointment management software designed to help medical, aesthetic and sports centers, salons, spas, barbershops, clinics, and other businesses handle patient records, commissions, expenses, inventory, email marketing campaigns, and more.

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TimeTap logo

HIPAA-compliant scheduling for complex booking needs

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TimeTap is a HIPAA- and GDPR-compliant appointment scheduling platform built for organizations with complex booking requirements. It automates scheduling, reminders, and availability while securely capturing client information across staff, locations, and time zones.

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vcita logo

Appointment scheduling and reminder solution

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Manage your business schedule, appointments and events, all in-sync with your existing calendar.

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BigChange logo

BigChange is the complete Job Management Platform.

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BigChange is the complete Job Management Platform, helping building maintenance, construction, environmental and other field service companies to streamline operations, grow revenue and deliver winning customer experiences.

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Podio logo

Cloud-based tool for collaborating on and managing projects

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Podio is a business software that helps teams work together more effectively. It provides a centralized platform for managing projects, tasks, and communication. Podio caters to a range of industries, including accounting, real estate, and marketing agencies, enabling teams to streamline their workflows and boost productivity.
A tool that your team will love to use, that's entirely customizable to suit how you run projects most efficiently.

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ServiceTitan logo

Management software for service contractors

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ServiceTitan is the leading business software solution for both residential and commercial field service businesses. Our powerful platform optimizes and eliminates tasks both out in the field and in the office with cloud-based responsiveness, real-time sync, and unbeatable uptimes.

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Square Appointments logo

Online booking and scheduling management platform

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Square Appointments provides online booking software for managing appointments, staff schedules, and services on a centralized platform. It syncs in real time, enabling clients to book 24/7 via a customizable site. Features include resource management, automated reminders, waitlists, and integrated payment processing for various methods. Businesses can reduce no-shows with customizable policies and prepayment options.

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Humanity Schedule logo

Employee shift scheduling

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Humanity is the leading cloud-based employee scheduling platform that accelerates schedule creation by up to 80 percent. Integrated with leading HCM platforms, Humanity enables your organization to easily and accurately create error-free schedules—with real-time availability conflict checking.

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Tradify logo

Powerful job management platform & app for small businesses

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Tradify's powerful toolset including calendaring is trusted by thousands of tradespeople and contractors.

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Statii logo

MRP Software Re-Invented for Small Manufacturers.

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Affordable, easy-to-use MRP software tailored for small to medium-sized manufacturers.

Includes unlimited telephone support, rapid setup, simple 30-day contracts, and integrated modules for quoting, scheduling, inventory control, and real-time shop floor visibility.

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ScheduleFlex logo

Smarter workforce scheduling

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Shiftboard is the leading provider of workforce scheduling software. Thousands of customers choose Shiftboard to help lower labor costs, increase worker productivity, and decrease employee turnover.

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Service Fusion logo

Field service management for contractors

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Smart, simple field service software. Scheduling, jobs, invoicing, payments—no per-user fees, no clutter, just what your business needs.

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Calendbook logo
Category Leaders

More bookings & sales sharing free calendar slots via links

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Calendbook is a calendar & appointment scheduling solution that includes reminders, rescheduling, availability management, and more.

Calendbook allows even free users to get paid for their precious time via stripe

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Bookafy logo

Free online appointment booking software

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Free Online Appointment Booking with Customizable Booking Page to Match Your Brand.

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OpsGenie logo

Modern IT incident management and response solution

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Opsgenie centralizes alerts from your monitoring, ticketing and ITSM tooling then dispatches them based on source, content and time to the folks who are on-call and ready to take action.

Opsgenie provides teams with all the information needed to collaborate and troubleshoot during an incident.

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TimeClock Plus logo

Workforce management, time tracking and scheduling solution

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TimeClock Plus is a cloud-based workforce management solution that enables public and private organizations to manage time and attendance, employee leave, scheduling and labor compliance. It integrates with all major payroll providers as well as PeopleSoft, Oracle HCM, SAP and Workday.

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Reservio logo

Online booking & appointment scheduling software

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Reservio is an online booking & appointment scheduling platform for client-serving businesses of all sizes - with features for performance tracking & promotion

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Vectera logo

Meeting room scheduling and video conferencing platform

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Vectera is a cloud-based online conferencing platform designed to assist sales, customer success, and financial advisory teams with meeting room scheduling and video conferencing. Key features include screen sharing, file transfer, custom branding, calendars, and data encryption.

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