List of the Top 25 Calendar Software for Mid Size Business in 2026

Proton Mail for Business offers a secure and professional email solution trusted by 50,000 organizations. Built with end-to-end encryption and protected by Swiss privacy laws, Proton Mail ensures your sensitive information is safe from unauthorized access and data leaks. Whether you're a small business or a large organization, you can ensure regulatory compliance, reinforce client trust, and keep your communications safe. Easily migrate your team from Google or Microsoft, use your own email domain for your communications, and manage your schedule with Proton Calendar — all in a user-friendly, privacy-focused platform.

Google Calendar is an effective tool designed to help you keep your life organized by enabling you to effortlessly plan and oversee events across multiple devices. You can easily create and share calendars, set up reminders, and send invites with just a few clicks. With its integration into Gmail, Calendar automatically populates events from your emails and connects with Google Meet for convenient meeting arrangements. Whether you’re working with teams or juggling personal commitments, Google Calendar simplifies the process of managing your time and enhances collaborative efforts.

Simplify the management of your event calendar and registration for both your customers and your team. Trumba presents a versatile and customizable event calendar solution that is favored by educational institutions, healthcare providers, government agencies, and various organizations around the globe. As a HIPAA-compliant option for hospitals and healthcare entities, Trumba is prepared to enter into a Business Associate Agreement (BAA) with covered organizations. You can easily embed Trumba calendars on your website or use fully-hosted pages that align with your brand's online identity, making it convenient for attendees to discover events, subscribe to calendars, register, make payments, and receive updates. Moreover, Trumba can seamlessly integrate with other calendar systems, creating a streamlined experience for your users while enhancing internal workflows. Customers of Trumba consistently praise the effectiveness of our implementation services and the quality of our ongoing customer support. Additionally, a 30-day free trial and/or online demo are readily available upon request (no credit card required), allowing potential users to experience the platform risk-free.

Bordio is a software solution tailored for project management, aimed at assisting teams in organizing their projects and tasks with greater efficiency. This task management platform enables users to layout their team's weekly agenda using an interactive project planning calendar, prioritize activities through a kanban board, and set meeting reminders—all within a single cohesive system. Envision the simplicity of dragging and dropping tasks into your digital calendar, color-coding them for enhanced clarity on current priorities and forthcoming obligations. Need to arrange a meeting? You can easily do so within Bordio’s work board, simplifying your workflow by reducing the reliance on multiple applications. Furthermore, the platform allows for real-time communication within a task, ensuring that all discussions and documents remain organized and within easy reach. Bordio’s integration with Google Calendar further amplifies its capabilities by providing a consolidated view of all your schedules. This project management tool not only presents an economical option for thorough work management but also functions as both a team management software and a project tracker, facilitating the management of workloads, monitoring of progress, and ensuring timely project completion. With features such as the task tracker and team task planner, Bordio empowers users to oversee the advancement of each task effectively. In addition, the collaborative aspects of the platform foster a more engaged and productive team environment.

An exceptional email client for either Windows or macOS can significantly enhance your productivity and streamline your email workflow. eM Client stands out as a comprehensive email solution that features an intuitive and organized layout. It encompasses a variety of tools including task management, calendars, online meeting scheduling, contact management, note-taking, and chat functionalities. You can effortlessly arrange online meetings with seamless integration into platforms such as Zoom, MS Teams, and Google Meet, while also utilizing cloud attachments for better file management through services like Dropbox and Google Drive. This email client supports all email providers that operate on IMAP, POP, or Exchange Web Services protocols. Furthermore, it is fully compatible with major platforms like Google Workspace, Microsoft 365 Outlook, and Exchange, among others. eM Client enhances email interactions for professionals, businesses, and personal users alike. It boasts advanced capabilities, including server-side searching, instant message translation, the ability to "Snooze" emails or "Watch for replies," synchronized tagging, and user-friendly email encryption options such as PGP/S/MIME. Additionally, it ensures user privacy by automatically blocking tracking pixels in emails. Customization is a key feature, allowing you to tailor the interface and functionalities to suit your individual preferences. You have the option to design your own themes or select from existing ones, as well as modify your toolbar, shortcuts, and message lists to create a personalized email experience that meets all your needs.

Microsoft Outlook is a modern communication and productivity platform that combines email, calendars, contacts, and task management into one powerful application. Available on desktop, mobile, and web, Outlook provides a seamless experience for individuals and teams looking to stay connected and efficient. Its integration with Microsoft 365 and third-party providers like Gmail, Yahoo, and iCloud ensures all your accounts are accessible in one unified inbox. The addition of Microsoft Copilot transforms Outlook into an AI-powered assistant—capable of summarizing long threads, organizing your inbox, suggesting replies, and helping you manage your schedule intelligently. Shared calendars, meeting insights, and scheduling suggestions enable better collaboration across time zones and teams. Outlook’s enterprise-grade security safeguards communications through advanced encryption, spam filtering, and ransomware protection powered by Microsoft Defender. Users can personalize their Outlook experience with custom layouts, color themes, and productivity integrations like Power BI dashboards and Adobe Acrobat tools. Cross-device synchronization ensures every update reflects instantly across PC, Mac, mobile, and web versions. Outlook also connects directly to OneDrive and Teams, enabling users to attach, share, and collaborate on files without leaving their inbox. Whether for personal productivity or enterprise operations, Outlook remains the trusted choice for managing communication, time, and collaboration in the AI era.

Calendly is a scheduling automation platform that helps individuals, teams, and businesses simplify the process of booking meetings. Instead of coordinating over email, users can set availability preferences and share a personalized link. Invitees choose a time that works, and Calendly handles the rest—from calendar syncing and time zone adjustments to confirmations and reminders. Designed to support a wide range of scheduling needs, Calendly offers options for one-on-one meetings, group events, collective scheduling with multiple team members, and round robin distribution for routing meetings to the right person. This flexibility makes it a fit for sales, marketing, recruiting, customer success, and service-based businesses. Calendly integrates with tools like Google Calendar, Outlook, Zoom, Microsoft Teams, HubSpot, Salesforce, Slack, Stripe, and others, allowing teams to embed scheduling directly into existing workflows. Admin controls, analytics, and enterprise-grade security features ensure Calendly works seamlessly at scale. Whether you're a solo professional or part of a global organization, Calendly makes it easy to book meetings, save time, and improve how you connect with others.

Google Calendar is a comprehensive AI-powered scheduling and calendar management platform designed to help individuals, businesses, and teams organize their time, meetings, and daily responsibilities more effectively. As part of the Google Workspace ecosystem, the platform integrates directly with Gmail, Google Meet, Google Tasks, and other Workspace applications to create a connected productivity experience across devices and workflows. Gemini AI enhances scheduling by helping users quickly identify the best meeting times, add events from emails automatically, and simplify appointment coordination without extensive manual effort. Built-in appointment booking pages allow customers, clients, and coworkers to schedule meetings instantly while supporting advanced features such as multiple booking pages, automatic reminders, and payment collection through Stripe integrations. Google Calendar also helps users stay organized by syncing tasks directly from Google Tasks, displaying travel reservations and event details from Gmail, and enabling seamless collaboration through shared calendars and event scheduling tools. Teams can attach agendas, documents, and meeting resources directly to events while integrating Google Meet video conferencing links for smooth remote collaboration. The platform supports customizable working hours, working locations, multiple calendar views, and focus time scheduling to help users improve time management and reduce interruptions during important work sessions. Time Insights analytics provide visibility into how users spend their time and who they collaborate with most frequently, helping organizations improve scheduling efficiency and workload balance. Google Calendar automatically syncs across desktops, smartphones, tablets, smartwatches, and web browsers, ensuring users always have access to updated schedules from virtually anywhere.

Thunderbird is a free email client that offers an easy installation and customization process, filled with a range of remarkable features! It significantly improves your email experience by merging efficiency, security, and cutting-edge technologies. You can prioritize your important tasks without being overwhelmed by unnecessary distractions. Various functionalities, such as built-in Do Not Track options and the ability to block remote content, work together to safeguard your privacy and security, giving you peace of mind about your personal information. Additionally, with Add-ons (Extensions & Themes), you can effortlessly adjust Thunderbird's look and capabilities to match your preferences. You can also manage your schedule and important dates with a calendar that integrates smoothly with your Thunderbird email, allowing you to coordinate multiple calendars, craft daily to-do lists, invite friends to events, and subscribe to public calendars. Being an open-source project, Thunderbird encourages everyone to get involved by contributing ideas, designs, code, and volunteering to support fellow users in the community. This collaborative spirit not only improves the software but also creates a strong sense of camaraderie among its users, making Thunderbird not just a tool, but a community-driven platform. By joining in, users can help shape the future of Thunderbird, ensuring it continues to meet the evolving needs of its audience.

Vivaldi browser elevates your digital experience by protecting you from trackers, eliminating disruptive ads, and offering unique built-in features. Experience rapid browsing with Vivaldi. Designed with user preferences at its core, Vivaldi is a flexible web browser that presents an array of features and customization options, making it an essential asset for online navigation. One of Vivaldi’s most impressive features is its advanced tab management system, which makes it easier to organize and manage multiple tabs simultaneously. In addition, Vivaldi comes equipped with a variety of integrated tools, including a thorough notes and bookmarks manager, as well as the ability to easily capture and share screenshots. With a strong emphasis on speed and security, Vivaldi integrates vital features like ad-blocking and robust privacy protections. Ultimately, Vivaldi offers a unique and personalized browsing experience for those who desire more control and flexibility in their internet usage, ensuring that each user can tailor their online journey to their specific needs and preferences. Users will find that Vivaldi not only enhances their surfing efficiency but also ensures a more enjoyable and secure online presence.

Effortlessly manage your images, documents, notes, and other content across all devices while ensuring they are secure and up to date, giving you access no matter your location. If you happen to lose a device, you can use Find My iPhone through iCloud.com to locate it, activate Lost Mode, or erase its information remotely. Store your files safely in iCloud Drive, allowing easy sharing with friends and colleagues. You can also edit or upload photos and videos from any device, with the changes immediately visible on all your devices, which boosts both productivity and connectivity. This ensures that your essential content is always readily available, making it convenient to access whenever you require it. With these features, you can maintain peace of mind knowing your information is both secure and easily retrievable.

Boost your efficiency with a professional-grade email and calendar solution designed for businesses. Exchange allows for seamless collaboration on crucial documents while providing an organized inbox that prioritizes important messages and adapts to your personal work style, enabling you to handle tasks with greater effectiveness. Enjoy a tailored inbox equipped with valuable features, alongside a more organized approach to managing and responding to emails. The enhanced search capabilities yield faster and more thorough results, and the integration of Add-ins presents robust customization options that connect you to modern services and internal business tools. Moreover, improve your scheduling experience with an advanced calendar system that goes beyond basic appointment management by automatically extracting information from emails, such as flight confirmations and hotel reservations, while also suggesting venues based on your geographical position. Microsoft Exchange Online serves as a reliable and secure hosted email solution for businesses, prioritizing the safeguarding of your data with sophisticated security protocols. When these powerful tools are combined, they create a streamlined workflow that not only enhances productivity but also inspires your team to think more creatively and collaborate more effectively. This innovative approach to communication and scheduling can significantly transform how your organization operates.

Countless individuals depend on Any.do to maintain their organization and enhance productivity. This highly regarded to-do application is lauded for its effectiveness and simplicity, earning recognition from esteemed outlets such as Apple, Google, and Forbes, among others. Users appreciate its user-friendly interface, which streamlines task management and boosts efficiency.

Spike consolidates your entire workspace into a single Inbox that encompasses email, chat, calendars, calls, team collaboration, and tasks, effectively streamlining your workflow by eliminating the need to toggle between multiple applications. By combining conventional email with instant messaging, Spike's conversational email feature reduces the chaos of lengthy email threads. With real-time communication and live collaboration capabilities, users can enjoy enhanced interactions that foster a more personable communication atmosphere. Available on iOS, Android, Mac, and Windows, Spike ensures that you can stay connected and organized no matter what device you are using. This integration of features is designed to improve productivity and simplify the way you manage your professional communications.

To prevent valuable opportunities from slipping away, it’s crucial to align tasks with the right people. Utilizing automated tools—ranging from analyzing buyer signals to creating efficient sales rhythms—can greatly enhance your chances of closing deals. For an improved email experience, it might be wise to invest in essential features for platforms like Gmail or Outlook. Cirrus Insight provides an all-in-one solution that integrates effortlessly with Salesforce, delivering all the critical information you need straight to your inbox. By integrating automation into your sales processes, you can eliminate the monotonous chore of manually recording actions in Salesforce. The repetitive tasks of data entry, copying, pasting, and switching between different applications can significantly hinder your productivity. By streamlining your schedule, you can dedicate more time to high-impact activities rather than getting caught up in administrative duties. With Cirrus Insight, managing your CRM can transform from a burdensome task into a streamlined process, allowing you to enhance your sales strategies and reach a broader audience of potential clients. Constantly updating your Salesforce activities can be a time-consuming endeavor, especially when engaging with leads who may not be ready to buy right away, underscoring the importance of adopting a more effective method. In this way, you can not only improve efficiency but also maintain better relationships with potential customers who may eventually convert.

Tuta is an encrypted email platform that prioritizes your privacy, offering secure communication with post-quantum cryptography. The service includes features such as encrypted calendars and contacts, ensuring that all your personal and professional data is protected. Tuta supports mobile apps for iOS and Android, and provides an ad-free, user-friendly experience with customizable options for custom domains. The company focuses on environmental sustainability, using green energy to power all its services while maintaining a zero-knowledge, open-source architecture.

Introducing Canary, your new AI assistant for email management that not only sends your messages but also identifies important ones, filters out spam, and offers a variety of additional features. With Canary, you can enhance your email experience and keep your inbox organized like never before!

For more than ten years, Vialect has been assisting organizations in linking individuals, resources, and skills. Noodle, an all-encompassing platform, enables both in-office employees and remote teams to share ideas, produce content, coordinate schedules, and conduct video meetings, all on a single secure platform. Additionally, users can choose between on-premise and cloud hosting options to suit their needs. This flexibility ensures that teams can work together seamlessly, regardless of their location.

Tockify provides an attractive pinboard calendar, along with sleek and contemporary designs for month grid and list/agenda style calendars, all designed for optimal mobile viewing. By seamlessly integrating with your website, Tockify not only enhances the visual appeal of your site but also creates a memorable experience for visitors. No longer do you have to compromise with an unattractive calendar that undermines your site’s aesthetic. Thanks to Tockify's user-friendly customizer tool, you can easily modify every aspect of your calendar, such as colors, fonts, and layouts, without any need for programming expertise. Setting up events on a daily, weekly, or monthly basis is straightforward, and you have the freedom to modify or delete specific occurrences as required. For example, managing an event that happens on the second and last Tuesdays of each month is simple and efficient. Furthermore, the platform allows community members to submit events for your consideration, which you can review and approve prior to publication. To boost user engagement, you can incorporate a prominent promotion button for any event, guiding visitors directly to your ticketing or booking pages. This all-encompassing solution not only streamlines your event organization but also significantly enhances user interaction and participation. Ultimately, Tockify stands out as an indispensable tool for anyone looking to elevate their event management experience.

Breeze is an intuitive scheduling application designed to assist in coordinating meeting times through email or text. It seamlessly integrates with Google Calendar, enabling users to arrange appointments for guests directly from a web interface. You can create an unlimited number of Breeze Pages, allowing each event type to have its own distinct page. Each page comes with a unique URL that can be easily shared with attendees, making it perfect for both business and personal events. The platform is user-friendly and adaptable to various needs. Effortlessly configure your preferences and distribute your Breeze pages to your guests; once a guest confirms their slot, Breeze will automatically update your calendar and generate a Google Meet or Zoom link. Breeze proves to be a valuable tool for teams and entrepreneurs around the world, accommodating multiple time zones while offering automated detection and configuration features. This makes it an optimal choice for anyone looking to streamline their scheduling process.

Apple offers a Calendar application that comes pre-installed on its iPhone, iPad, and Mac devices. Beyond functioning as a standard calendar, this app integrates smoothly with Apple Mail, enabling users to efficiently organize and oversee their appointments and commitments. Additionally, the Calendar app provides features that enhance productivity, making it easier for users to keep track of important dates and events.

Our goal is to support salons, spas, and beauty professionals by offering a streamlined appointment booking system that enables you to focus on delivering excellent client care. We provide the tools necessary to stay organized, boost productivity, and accelerate your business's success. With our contemporary and user-friendly online booking platform, clients can easily arrange their appointments at their convenience. You will have the flexibility to manage your business calendar while on the go, supervise your staff, and reduce no-shows with automated text reminders. Enhance your business outreach with automated text marketing and features tailored for client interaction. This system simplifies scheduling, manages marketing communications, nurtures client relationships, and seamlessly coordinates staff schedules. Begin confidently managing your appointments by taking advantage of our free trial, which can help you bring in more clients. Foster strong connections with your clients and your services, encourage more reviews, and improve communication through our two-way text messaging option. Equip your team with easy-to-use tools that significantly boost their productivity and effectiveness. Additionally, by optimizing these processes, you can redirect more of your energy toward the creative elements of your profession, allowing for greater innovation and growth. Ultimately, our platform is designed to elevate your business to new heights while ensuring a positive experience for both you and your clients.

A team-oriented collaborative calendar that simplifies the organization and scheduling of events. It offers a comprehensive view of participants, event details, locations, and timelines, making it easier for teams to stay informed. By minimizing the reliance on excessive communication channels like emails and spreadsheets, it enhances overall team communication. Team members can enjoy tailored access to the calendar, providing both individual and group autonomy while ensuring data security. This tool aids in effective resource management, helps to avoid scheduling overlaps, and allows for efficient task assignments while keeping track of the team's larger goals. Additionally, it centralizes all pertinent information—including images, documents, links, notes, and event-related comments with timestamps—into a single platform. This not only elevates productivity levels but also cultivates stronger collaboration within the team, helping to create a more cohesive work environment. Ultimately, a well-structured calendar can significantly transform the way teams operate and interact with one another.

Skiff offers a fully private encrypted workspace that seamlessly integrates with Mail, Calendar, and Pages, ensuring a secure platform for communication and teamwork. The products are meticulously crafted with a strong emphasis on user privacy and security, employing end-to-end encryption (E2EE) so that sensitive data and private keys remain exclusively under your control, granting you uninterrupted access to your email content. Users can benefit from generous free tiers that provide 10 GB of complimentary storage for emails, documents, attachments, and notes, along with the option to create up to four free email aliases to safeguard your identity. Moreover, Skiff Mail stands out as an open-source initiative that utilizes transparent cryptographic techniques and is subject to frequent external security assessments, with its whitepaper and source code available on skiff.com for public review. The platform is free from trackers and advertisements, allowing users to upgrade their services using cryptocurrency payments across various currencies, while ensuring that your personal information is never sold, shared, or collected. In this way, Skiff not only prioritizes security and privacy but also fosters a community-driven approach to its development and user experience.

FullCalendar effectively generates React virtual DOM elements, enabling you to leverage Fiber, which is known for its efficient rendering capabilities. To reduce the size of your project's bundle, you can take advantage of the modular plugins that FullCalendar provides. If you run into a complex problem, it's advisable to first refer to the documentation for assistance. If that doesn't resolve your issue, searching online for further information can be helpful. Should your search yield no results, consider asking your question on StackOverflow using the fullcalendar tag, ensuring that your inquiry is appropriately labeled as such. Additionally, if you have a desire to contribute to the FullCalendar project, your support would be greatly appreciated, especially given its growing popularity and the many enhancement opportunities it presents. By collaborating, we can work to improve the capabilities and accessibility of FullCalendar for all users involved, fostering a thriving community and resource for developers everywhere.