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Calendar reviews by real, verified users. Find unbiased ratings on user satisfaction, features, and price based on the most reviews available anywhere.

Best Calendar Software

Calendar software is intended to organize a user’s tasks, appointments, and goals in a visually simplistic way, which helps streamline the internal activities of an entire business. Calendar software facilitates the creation of electronic agendas that can be accessed, edited, and shared with employees company-wide.

Calendar software can be sold as a standalone product but is oftentimes included as part of a larger office suite. Calendars are used to streamline the internal workings of a company, with features that can include: collaborative scheduling, email appointment reminders, calendar viewing default (one day, one week, one month, or one year, workweek or work hours display, etc.), and group calendars.

To qualify for inclusion in the Calendar category, a product must:

Allow scheduling from individual and/or collaborating users
Provide collaborative calendar views
Feature customizable viewing options (e.g., day, week, month, year)

Top 10 Calendar Software

  • Outlook
  • Google
  • iCal
  • Microsoft Exchange Online
  • Spike
  • Calendar
  • Chili Piper
  • CiraSync
  • Teamup Calendar
  • Square Appointments

Compare Calendar Software

G2 takes pride in showing unbiased reviews on user satisfaction in our ratings and reports. We do not allow paid placements in any of our ratings, rankings, or reports. Learn about our scoring methodologies.
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(1,099)4.3 out of 5

Work efficiently with email, calendar, contacts, tasks, and more—together in one place. Office integration lets you share attachments right from OneDrive, access contacts, and view LinkedIn profiles.

(1,314)4.6 out of 5
Entry Level Price:$5 user/month

Integrated online calendars designed for teams

(149)4.0 out of 5

Keep track of your busy schedule and share it with others using Calendar. See all your calendars in a single window. Works with iCloud, Yahoo!, and Google.

(88)4.2 out of 5

Microsoft Exchange Online provides hosted email, calendar and contacts on your PC, phone and web browser.

(58)4.8 out of 5

Spike brings notes, tasks, and real-time collaboration right inside of your email Inbox. Instead of switching apps to check off a task or create a meeting agenda, Spike's powerful Inbox gives you a single place and a single feed in which to work. Manage your Email, create tasks, personal Notes, Group Chats, and collaborate in real-time on documents all without leaving Spike. Everything you need to get your work done is in a single feed, so you can finally give the app-switching a rest. Spik

(30)4.8 out of 5

Calendar harnesses the power of machine learning to give smart suggestions for when, where and how your meetings can take place.

(53)4.6 out of 5
Entry Level Price:$0

Revenue teams at companies like Square, Salesloft, Twilio, Zoominfo, Snowflake, Spotify, and Forrester use Chili Meetings to convert more leads into meetings and revenue. Our Meeting Lifecycle Automation suite goes far beyond a simple booking link. Each tool is purpose-built to help you book every meeting faster and make life easier for your prospects and customers. Chili Piper is a suite of automated scheduling tools that help revenue teams convert more leads into qualified meetings and our

(83)4.6 out of 5
Entry Level Price:$1 per user/per month

Specifically for Office 365 business users, CiraSync automatically enables access to shared calendars, Global Address Lists, and Public Folder contacts and calendars on business smartphones. Native Salesforce connector available plus sync to 170+ CRMs via PieSync. CiraSync is a secure, Azure-based solution that is extremely flexible, easy to configure, and requires no user training. The solution scales to thousands of smartphones. More than 8,500 companies with 125,000+ users benefit from the

(21)4.8 out of 5

Teamup simplifies how groups share plans, schedule events, and communicate statuses. Color-code calendars for teams, jobs, projects, and bookable resources. Centrally managed with role-specific access permissions. No accounts are required.

(24)4.3 out of 5

With Square’s appointment scheduling software, customers can always access your availability and book their appointment online. Easily keep your schedule open and attract new business—even when you’re done for the day.

(29)4.3 out of 5

ONLYOFFICE is an online office suite, developed by Ascensio System SIA, a Latvian software development company. The solution features online document editors, a platform for document management, corporate communication, mail and project management tools.

(12)4.6 out of 5

CalendarAnything is the #1 calendar app for Salesforce with 100K+ users! Schedule, manage marketing campaigns, plan projects, and more with the most customizable calendar solution for Salesforce. ★Try it free for 15 days★

(8)2.8 out of 5

Tap into calendars (Google, Outlook, iOS, etc) as a marketing channel. Target your audience by geography, behavior, or your CRM data. Go beyond the default 15-minute "calendar reminder" with custom calendar notifications. Track all activity inside your customers' calendars, such as in-calendar impressions, link clicks, social shares and more. Join thousands of businesses already using Eventable to boost conversions, from webinar attendance to in-store purchases.

(7)4.9 out of 5

Sunsama is a cloud-based calendar which helps your organize daily work. It helps you prioritize your tasks and events throughout the day. Notes from meetings can be added and unfinished tasks will rollover to a new day.

(5)4.5 out of 5

Fantastical is a calendaring application for Mac.

(4)4.9 out of 5

Boomerang Calendar is a alendar and scheduling tool built into Gmail.

(4)4.5 out of 5

WizCal is an AI-powered meeting scheduling assistant for Google and Exchange/Office 365 calendars. WizCal is integrated with Google web client and Outlook, and has apps for leading mobile platforms. Key product highlights: 1. Works seamlessly for your internal and external meetings. 2. Automatically learns and uses your meeting preferences. 3. Automatically finds a meeting room. 4.Finds time slots with minimum schedule disruptions for your group. 5.Schedules across multiple time zones.

(3)3.2 out of 5

Customizable calendar with must-have features to share activities, events and schedules. Improve communications with desktop and mobile access, website calendar plugins, invites & reminders, room booking and more.

(3)4.3 out of 5

OfficeCalendar is an easy-to-use, low-cost, server-based alternative to Microsoft Exchange Server that enables the sharing of Microsoft Outlook calendar, email, contact and task information on practically any Windows-based network, and does not require a dedicated server. OfficeCalendar Online gives users Outlook web access to their calendar, contact and task folders from anywhere and at anytime.

(2)5.0 out of 5
Entry Level Price:Free 1 user/month

- Tens of thousands of companies rely on Cronofy to power their scheduling, using enterprise-ready scheduling tools, embeddable components and APIs. - Our Scheduler is an off-the-shelf online application that allows you to wave goodbye to email-back-and forth. You can share your real-time availability with your contacts when booking meetings, and schedule from wherever you are on the web, in your favourite applications and email. - With the Scheduler, generate a one-time use meeting request li

(3)5.0 out of 5
Entry Level Price:Free (for individual)

Sync your Calendar events, Contacts or tasks with different cloud platforms. SyncGene automatically updates all connected devices. Do you use iPhone or Android phone? Have a tablet at home? Use Microsoft Exchange at work? - SyncGene syncs it all. Main features: Sync Calendar Have all your calendars Google/Outlook/Exchange/iCloud in one place. Keep them all up-to-date & never miss a meeting or event. Backup and restore your calendar events. Secure backup, because all the information is store

(1)4.0 out of 5

Acollab is a collaborative platform, with all the collaborative tools for your team, gathered in the same webspace : - file sharing (EDM) - project management - shared calendar - collaborative messaging - time tracking - polls - chat - etc Free trial up to 30 days, without commitment and without credit card. Cloud solution on servers that comply with European Community regulations. SSL protocol guaranteeing the confidentiality of your data.

(1)5.0 out of 5

A JavaScript event calendar. Customizable and open source.

SharePoint Exchange Calendar helps import events from multiple Office 365 and SharePoint 2019, 2016, 2013, or 2010 lists and Microsoft Exchange calendars, Google Calendar, and SalesForce Calendar into one SharePoint calendar. The Virto Exchange Calendar allows you to overlay Office 365 or SharePoint calendar, Exchange calendar, Google Calendar, SalesForce Calendar, SharePoint Lists, SQL Tables, or XML in a single calendar. If you use both Exchange calendar and SharePoint calendar for your busin

(1)5.0 out of 5

Trumba Connect is web-based event calendar software for publishing online, interactive, calendars of events.

(1)5.0 out of 5

UniCal is a customizable calendar web app that makes it easy for organization to promote events across multiple websites, it is an Angular.js-based tool using the headless/decoupled Drupal approach and COPE principle.

(3)4.3 out of 5
Entry Level Price:$19 per month (annual)

AddEvent is the number #1 "Add to calendar" service on the Internet. We handle millions of events every year for businesses around the world. EMBEDDABLE ADD-TO-CALENDAR BUTTON Use our beautiful "Add to calendar" button on your website or landing page to give your users a quick and effortless way to add your events to their calendars. When your users click the button, our service quickly adds your event to their calendar of choice. ADD-TO-CALENDAR LINKS FOR EMAILS Sharing your event has never b

0 ratings

Allcal is a community-driven calendar app that helps people get together for events. Allcal is about making it easier to connect with community through a calendar. Real-time updates notify and allow users to share calendars.

(1)4.5 out of 5

Keep organized with BlackBerry® Hub+ Inbox. Inbox consolidates all your email, calendar events and social notifications from apps like Facebook, WeChat, Twitter, LinkedIn and WhatsApp in one unified app. You can also sync your BlackBerry Hub+ Inbox with Wear OS by Google devices to receive notifications and respond directly from your watch.

0 ratings

BusyCal is a calendar app for macOS.

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Check out the G2 Grid® for the top Calendar Software products. G2 scores products and sellers based on reviews gathered from our user community, as well as data aggregated from online sources and social networks. Together, these scores are mapped on our proprietary G2 Grid®, which you can use to compare products, streamline the buying process, and quickly identify the best products based on the experiences of your peers.
High Performers
Microsoft Exchange Online
Square Appointments
Chili Piper
Teamup Calendar
Market Presence

Learn More About Calendar Software

What is Calendar Software?

Calendar software is ultimately defined by its user interface and ease of accessibility. Overall, it is meant to seamlessly transition from a traditional physical agenda, as well as provide additional collaborative benefits. Customizable viewing options allow users to observe a daily, weekly, monthly, or yearly view of upcoming tasks and events. Ease of collaboration is a common benefit that is integral for events and tasks involving large groups. Other customization options include ongoing calendar event scheduling and adjustable event notifications.

Why Use Calendar Software?

Since operating efficiently relies heavily on organization and productive collaboration, businesses will primarily benefit from a calendar’s scheduling feature. It’s common for plans to change, considerably more often within a large team. With calendar software, miniscule appointment changes can be adjusted very simply. Many calendars offer alerting functionality, so guests are notified when appointments change. In addition, the availability and capacity sharing features within calendar software facilitate transparency and allow team members to work around everyone’s personal schedule.

Task management is also a key benefit to calendar software. Along with a visually simple interface, a calendar can double as a reminder tool for short-term and long-term professional responsibilities. With clear due dates and reminders, assigned tasks don’t go unnoticed.

An appealing aspect of calendar software is its affordability. In most cases, basic versions are free to use. Free options allow businesses to choose a calendar software that fits perfectly with their team without the risk of immediate cost. Once a business identifies the perfect fit, it can consider premium editions for added benefits. Premium benefits are typically part of a larger software suite and can include features such as additional storage, increased user capacity, and user activity tracking.

Additionally, utilizing calendar software is an example of working smarter, not harder. Being aware of your availability leaves room for free time, which in turn can be an opportunity to organize other aspects of your work or just take a breather. Employees have the freedom to decline invitations, a time-saving feature that prevents unneeded back and forth between manager and employee. Plus, calendar software is easy and intuitive enough to introduce to a team without formalized training.

Key Benefits of Calendar Software

  • Cloud-based scheduling
  • Third-party application integration
  • Availability and capacity sharing
  • Appointment reminders
  • Address book
  • Cross-device capability
  • Customizable calendar views

Who Uses Calendar Software?

Calendar software is built to serve the masses, and everyone has the option to use digital calendars to enhance their daily lifestyle. For business users, the benefits are invaluable. These are the main groups that benefit from calendar software:

Businesses – Calendar software is ideal for businesses of all sizes and especially useful for companies with employees who are often remote or out of the office. Internal planning of all types is easily scheduled with minimal effort.

Individuals – An individual user is likely to use a basic calendar app for mobile devices to plan their day-to-day tasks assigned at work and in their personal life. A calendar is more approachable than a normal to-do list, but also gives a sense of a deadline.

Kinds of Calendar Software

Calendar software will typically appeal to either a casual user or business user depending on its key capabilities and interface. While both users are looking for basic scheduling, a casual user will gravitate toward free, aesthetically pleasing, and easy-to-use software that works well on a mobile device. A business user will get more use out of calendar software that facilitates easy collaboration and includes customization options.

Suite Calendars – Collaborative teams benefit greatly from calendars that are a part of a larger suite of applications. With internal integrations, general sharing is straightforward and simple. Common suite integrations include email software and business content management software.

Standalone Calendars – Appealing to casual users, standalone calendar applications are a great choice for people who just want a basic calendar for personal scheduling. The interface is typically straightforward and will not have many added features or enhancements beyond its basic format. Standalone calendars are clean and ideal for those who don’t have numerous appointments or tasks to keep track of.

Client Scheduling Calendars – Calendar software used specifically for client bookings ensures organized appointment scheduling and will oftentimes allow clients to take the reins and schedule their own appointments. Real-time availability shows the open timeslots a business has, making it simple for a client to schedule around unavailable times. For health care providers, medical scheduling software facilitates easy scheduling for patient examinations.

Calendar Software Features

Scheduling – Scheduling is the primary benefit of calendar software. Users have plenty of customizable options to choose from when creating an appointment invitation, whether its for a large event or for a quick one-on-one meeting.

Collaboration – Calendars allow you to see other team calendars within your own calendar to get a better idea of team availability. Users can toggle their view based on the calendar(s) of interest.

Organization – A calendar’s interface allows a user to visualize their own availability and customize their view to their personal needs. Users can also choose to download third-party calendar templates or task templates for further customization.

Tasks – Both personal and collaborative tasks can be in the spotlight on calendars. Set up personal reminders for tasks, organize your own tasks, or view collaborator tasks.

Integration – A notable feature is the option to interact with other software in an effort to enhance the key features of the basic calendar. Common integrations include enhanced to-do lists, video conferencing software, and internal communications software. Calendars that are part of a suite feature their own internal integrations.

Potential Issues with Calendar Software

While calendar software has proven to be an essential tool for any business, it still has its potential issues:

Sharing Setbacks – With a large variety of calendar software available, it’s common for employees to favor one calendar software over another. If employees choose to stray from the company’s choice of calendar software, sharing calendar data between multiple calendar applications can prove to be a challenge. Many calendars do not allow sharing with competitor applications. To prevent any mishaps, ensure the entire company sticks to one platform.

Appointment Time Restrictions – Calendars will typically only offer 15–30-minute time spans for invitations, making it difficult to plan meetings that are fewer than 15 minutes long. This can muddy up calendars for people that have packed schedules and prefer to schedule meetings or appointments with intricate time spans.