Proton Calendar is a good choice for users who value privacy. It’s end-to-end encrypted, free from ads, and doesn’t track data. It handles essentials like event scheduling, recurring meetings, and mobile access with ease.
However, its features can feel a bit limited if you’re looking for deeper integrations, task linking, or robust collaboration tools. If your workflow demands more flexibility and seamless coordination, Proton Calendar might not meet every need.
That’s where Proton Calendar alternatives come in. In this article, we’ll explore the top options that offer more dynamic features, stronger integrations, and better support for real-time collaboration so you can find the one that fits your productivity style best.
10 Best Proton Calendar Alternatives for Secure and Efficient Scheduling
- Best Proton Calendar Alternatives at a Glance
- What Should You Look for in Proton Calendar Alternatives?
- The 10 Best Proton Calendar Alternatives
- 1. ClickUp (Best all-in-one project management tool with calendar integration)
- 2. Google Calendar (Best for scheduling within the Google Workspace ecosystem)
- 3. Microsoft Outlook Calendar (Best for professionals using Microsoft 365)
- 4. Fantastical (Best Apple-focused calendar app with natural language input and smart design)
- 5. Apple Calendar (Best built-in calendar for native Apple integration)
- 6. Zoho Calendar (Best free calendar for Zoho app users)
- 7. Amie (Best minimalist calendar combining tasks, email, and scheduling)
- 8. Any.do (Best task-centric calendar with daily planning and cross-platform syncing)
- 9. Teamup Calendar (Best for managing shared team schedules and resources)
- 10. Business Calendar 2 (Best for deep Android calendar customization and task control)
- 🎯 Other Proton Calendar Alternatives:
- Choose Your Best Proton Calendar Alternative With ClickUp
Summarize this article for me pleaseBest Proton Calendar Alternatives at a Glance
| Tool | Best features | Best for | Pricing |
|---|---|---|---|
| ClickUp | Drag-and-drop task scheduling, recurring events, shared team views | All-in-one project management with calendar integration for teams of all sizes | Free forever plan; Customizations available for enterprises |
| Google Calendar | Google Meet integration, drive file attachments, shared calendars | Scheduling within the Google Workspace ecosystem for individuals and freelancers | Free Paid plans start at $8.40 per/month per user |
| Microsoft Outlook Calendar | Centralized event scheduling, shared team calendars, color-coded categories | Enterprises and professionals using Microsoft 365 | Free Paid plans start at $9.99/month/user |
| Fantastical | Natural language input, in-app weather forecasts, smart calendar sets | Apple-focused individuals who prefer natural language input and smart design | Free Paid plans start at $4.75/month/user billed annually |
| Apple Calendar | iCloud sync across Apple devices, shared calendars, location-based alerts | Built-in calendar with native Apple integration for individuals and solopreneurs | Free |
| Zoho Calendar | Public/private sharing, multiple calendar views, Zoom/Zoho Meeting integration | Managing events for Zoho app users at small and midsized companies | Free |
| Amie | Side-by-side calendar and tasks, recurring habits, AI task scheduling | Minimalist planning that combines tasks, email, and scheduling for small teams | Paid plans start at $20/month/user billed annually |
| Any.do | Drag-and-drop task planning, voice input, AI-powered schedule suggestions | Daily task planning and cross-platform syncing for individuals and small teams | Personal: Free Paid plans start at $7.99/month/user |
| Teamup Calendar | 11 calendar views, color-coded sub-calendars, 9 user permission levels, built-in resource booking | Managing shared team schedules and resources for small to mid-sized teams | Free Paid plans start at $12/month |
| Business Calendar 2 | Flexible month view, advanced recurring events, file/photo attachments | Deep calendar customization and task control for individuals and small teams | Free Paid plans start at $4.99 |
How we review software at ClickUp
Our editorial team follows a transparent, research-backed, and vendor-neutral process, so you can trust that our recommendations are based on real product value.
Here’s a detailed rundown of how we review software at ClickUp.
Summarize this article for me pleaseWhat Should You Look for in Proton Calendar Alternatives?
Examining features that improve personal and professional scheduling is critical when comparing alternatives to Proton Calendar. Key factors to focus on are:
- Integration capabilities: Search for a good Proton Calendar alternative that can link with other products and services, including email systems, task management, and conferencing apps
- Collaboration features: Select calendars that provide shared access, allowing teams to quickly plan upcoming events, view availability, and manage group schedules
- User interface and experience: Pick Proton Calendar alternatives that offer an intuitive, customizable interface that includes color-coded events and flexible views to improve usability and organization considerably
- Cross-platform accessibility: Make sure the Proton Calendar alternative allows for synchronization across multiple devices and operating systems, ensuring consistent access to your schedule
- Privacy and security: Look for a calendar tool that is exhaustive in terms of privacy and security. While Proton Calendar stresses end-to-end encryption, it is important to evaluate the security measures of other solutions for protecting sensitive data
📮 ClickUp Insight: Only 7% of professionals depend on AI primarily for task management and organization. This could be because the tools are restricted to calendars, to-do lists, or email apps.
With ClickUp, the same AI powers your email or other communication workflows, calendar, tasks, and documentation. Simply ask, “What are my priorities today?” ClickUp Brain will search across your workspace and tell you exactly what’s on your plate based on urgency and importance. Just like that, ClickUp consolidates 5+ apps for you within a single super app!
Summarize this article for me pleaseThe 10 Best Proton Calendar Alternatives
Although Proton Calendar has strong privacy features, users looking for improved efficiency and integration may want to consider alternatives. The best Proton Calendar alternatives fit various project management tools and scheduling needs.
1. ClickUp (Best all-in-one project management tool with calendar integration)
ClickUp, the everything app for work, is a complete project management platform with intuitive calendar integration. It is a perfect alternative for individuals and teams looking to optimize their work.
ClickUp Calendar is an AI-powered tool that simplifies scheduling and task management.
ClickUp’s AI-powered calendar is more than just a scheduling tool—it’s a smart, integrated workspace that combines advanced automation, meeting management, and productivity features to help you and your team stay organized and efficient.
It combines tasks and events into a single view and offers automatic time blocking and meeting reminders. The integrated ClickUp AI plans your perfect schedule based on your tasks, events, and goals.
From auto-scheduling tasks to setting new appointments, ClickUp Calendar powers prioritization. It also syncs with external calendars such as Google Calendar and Outlook.
Watch this video to know more about ClickUp Calendar:
The ClickUp Calendar View makes it easy to visualize your workload, seamlessly integrating tasks, reminders, and recurring meetings into one centralized hub.
Whether organizing your calendar or blocking time for deep work, it beautifully organizes everything with color-coded options and real-time collaboration, ensuring your entire calendar works for you, not against you.
ClickUp’s task management capabilities combine scheduling with action. Everything you need, from quick wins to long-term projects, is housed within a single app.
Unlike traditional calendar tools, ClickUp Tasks allows you to link events directly to tasks, assign owners, add subtasks, set dependencies, and track progress—all from the same page. That means no switching between apps or missing deadlines due to disjointed tools.
ClickUp’s pre-built scheduling templates help you get started quickly. These calendar and schedule templates have standardized formats that save time and minimize uncertainty. Plus, you can customize them according to your team’s specific processes, making recurring events much easier to manage.
For example, the ClickUp Calendar Planner Template helps individuals and teams manage and monitor events, activities, and tasks in a unified platform.
It allows you to customize the calendar’s statuses, fields, and views to meet your needs, improving organization and productivity.
ClickUp Brain adds sophisticated functionality to daily tasks. It produces task descriptions, summarizes meeting notes, automates reminders, and forecasts deadlines based on current workload and project complexity.
Its AI calendar functionalities are especially useful for fast-paced teams. You can search and ask questions about your schedule, send scheduling links, and join calls, all from within the Calendar.
You can also use ClickUp Brain to create weekly schedules based on your tasks. Here’s one example:
ClickUp best features
- Visually manage tasks by dragging and dropping them across days, weeks, or months
- Set flexible recurring rules to automate repetitive task scheduling
- Share calendars with your team to coordinate schedules
- Connect ClickUp with Google Calendar, Outlook, and more
- Use AI to automatically generate meeting agendas, summarize notes, draft follow-ups, or even help you plan your week based on workload and priorities
ClickUp limitations
- Because of its many features, new users may take time to understand the platform’s full possibilities
ClickUp pricing
free forever
Best for individual users
Free Free
Key Features:
60MB Storage
Unlimited Tasks
Unlimited Free Plan Members
unlimited
Best for small teams
$7 $10
Everything in Free +
Unlimited Storage
Unlimited Folders and Spaces
Unlimited Integrations
business
Best for mid-sized teams
$12 $19
Everything in Unlimited +
Google SSO
Unlimited Message History
Unlimited Mind Maps
enterprise
Best for many large teams
Get a custom demo and see how ClickUp aligns with your goals.
Everything in Business +
White Labeling
Conditional Logic in Forms
Subtasks in Multiple Lists
* Prices when billed annually
The world's most complete work AI, starting at $9 per month
ClickUp Brain is a no Brainer. One AI to manage your work, at a fraction of the cost.
ClickUp ratings and reviews
- G2: 4.7/5 (10,600+ reviews)
- Capterra: 4.6/5 (4,500+ reviews)
What are real-life users saying about ClickUp? Heath Hayden says:
🌟 Bonus: Automate scheduling and calendar management with ClickUp’s AI Agents. These handy aides can automate routine updates, reminders, and reporting—freeing you from manual tracking and status checks.
Here’s how you can leverage both Prebuilt and Custom Agents:
- Automated Daily or Weekly Reports: Set up Prebuilt Agents to post daily or weekly summaries of tasks, deadlines, and progress in your chosen Space, Folder, or List. This keeps everyone updated on schedules without manual effort
- Reminders and Status Updates: Configure Custom Agents to trigger reminders or comments when due dates approach, tasks are overdue, or priorities change—ensuring nothing slips through the cracks
- Smart Scheduling Actions: Agents can be set to create, update, or move tasks based on changes in your calendar or workflow, helping you adapt to shifting priorities in real time
- Answering Scheduling Questions: Deploy an Answers Agent in a chat channel to instantly answer questions like “What’s due today?” or “Who is available for a meeting?” by searching your workspace data
Learn how to build your first agent today:
2. Google Calendar (Best for scheduling within the Google Workspace ecosystem)
Google Calendar is a widely adopted scheduling tool, renowned for its effortless synchronization with other Google products.
Users swiftly create new Google Calendar events, ensuring that all their calendars remain up-to-date across devices. The calendar view itself is highly flexible, allowing users to consolidate personal and professional events from multiple integrated calendars, including those from other platforms.
Beyond basic scheduling, Google Calendar offers features like automatically adding events from Gmail, such as flight bookings and hotel reservations, directly into your calendar. It’s a logical, no-friction solution for anyone using Google’s services.
Google Calendar best features
- Integrate with Google Meet for streamlined video conferencing and attach files from Google Drive to events
- Receive automatic event reminders via email or mobile notifications
- Offer distinct event types, including “Focus time” and “Out of office,” for better time boxing
- Share calendars with family members or colleagues, enabling coordination and keeping everyone on the same page
- Access your schedule across devices, including your Android phone
Google Calendar limitations
- It doesn’t offer advanced project management calendar features like task dependencies or workload tracking
- Customization is limited compared to tools focused on productivity workflows
Google Calendar pricing
- Free
- Business Starter: $8.40 per/month per user
- Business Standard: $16.80/month per user
- Business Plus: $26.40/month per user
- Enterprise: Custom pricing
Google Calendar ratings and reviews
- G2: Not enough reviews
- Capterra: 4.8/5 (3,800+ reviews)
What are real-life users saying about Google Calendar?
A Capterra review says:
📚 Also Read: How to Use Google Calendar for Time Blocking?
3. Microsoft Outlook Calendar (Best for professionals using Microsoft 365)
Microsoft Outlook Calendar is a reliable, enterprise-ready scheduling tool for Microsoft Outlook and Microsoft 365. It lets users schedule meetings, appointments, and activities systematically while syncing everything across devices.
Its close integration with Microsoft Teams, Word, Excel, and OneDrive makes it extremely valuable for Microsoft ecosystem professionals. You can send invites, check team availability, and start online meetings directly from your calendar view.
For task management, it integrates with Microsoft To Do, allowing users to create, manage, and even drag tasks directly onto their calendar to block out time for completion.
Microsoft Outlook Calendar best features
- Schedule meetings, set reminders, and manage events from one centralized calendar
- Organize meetings with integrated room and resource booking functionalities
- Share calendars with colleagues or teams to coordinate availability and plan projects
- Use color-coded categories to organize and visually distinguish events
- Access your entire calendar offline, providing flexibility when an internet connection is unavailable
Microsoft Outlook Calendar limitations
- The web interface and mobile applications can sometimes be less intuitive for simple, personal-use scheduling compared to standalone calendar apps
- Advanced features like automation or in-depth analytics are locked behind paid plans
Microsoft Outlook Calendar pricing
- Free
- Microsoft 365 Personal: $9.99/month per user
- Microsoft 365 Family: $12.99/month per user
- Microsoft 365 Premium: $19.99/month per user
- Microsoft 365 Business Basic: $7.20/month per user
- Microsoft 365 Business Standard: $15/month per user
- Microsoft 365 Business Premium: $26.40/month per user
Microsoft Outlook Calendar ratings and reviews
- G2: 4.5/5 (3,200+ reviews)
- Capterra: 4.5/5 (2,300+ reviews)
🔎 Did You Know? The idea of adding a leap day every four years goes back to circa 300 B.C. This method synchronizes our calendar with Earth’s orbit around the Sun, which accounts for the additional 0.2422 days in each solar year.
📚 Also Read: Most Useful Outlook Integrations
4. Fantastical (Best Apple-focused calendar app with natural language input and smart design)
Integrated with the Apple ecosystem, Fantastical is known for its intuitive design and natural language processing, which allow users to create events effortlessly and provide a cohesive experience across devices.
It supports multiple calendar accounts, including iCloud, Google, and Microsoft Exchange, consolidating all your calendars in one place. Tools like “Openings” and “Meeting Proposals” facilitate finding mutually agreeable times with external contacts.
The application’s features include a detailed month calendar view, the ability to attach files to events, and integration with other apps like Todoist for task management.
The best part is that while it was initially only available for Apple, it now has a Windows desktop version too.
Fantastical best features
- Create new events using natural language input, simplifying the scheduling process
- Access weather forecasts within the app to plan your events accordingly
- Group calendars into sets that automatically switch based on location or activity
- Propose multiple meeting times to attendees for streamlined scheduling consensus
- View and manage tasks from Google Tasks, Microsoft 365, and more
Fantastical limitations
- There is no Android app, which limits usability for users outside the Apple and Windows ecosystems
- Premium features require a paid subscription, which may be pricey for casual users
Fantastical pricing
- Free
- For Individuals: 6.99/month
- For Families up to 5: $10.49/month
- For Teams: $6.99/month per user
Fantastical ratings and reviews
- G2: Not enough reviews
- Capterra: 4.8/5 (20+ reviews)
➡️ Read More: Best Daily Planner Apps (Features, Pricing)
5. Apple Calendar (Best built-in calendar for native Apple integration)
Apple Calendar offers a straightforward and efficient way to manage your schedule, tightly integrated with macOS and iOS devices. Its simplicity and seamless synchronization make it a reliable choice for Apple enthusiasts.
The application allows users to create separate calendars for work, personal, and other categories, enabling organized scheduling. Moreover, it integrates with other services like Siri for voice-controlled scheduling and provides notifications for upcoming events, ensuring you stay informed about important dates.
Apple Calendar best features
- Sync across all your Apple devices using iCloud, ensuring your calendar is always up-to-date
- Share calendars with others to coordinate family or team schedules
- Create separate calendars for work, personal, and other categories to organize your events effectively
- Integrate events and to-do deadlines from the native Reminders app
- Receive location-based alerts with built-in travel time estimates
Apple Calendar limitations
- It lacks advanced productivity features like task management or workflow automation
- It is only available on Apple devices
Apple Calendar pricing
- Free
Apple Calendar ratings and reviews
- G2: 4.1/5 (190+ reviews)
- Capterra: Not enough reviews
What are real-life users saying about Apple Calendar?
A G2 review says:
📚 Also Read: How to Sync Google Calendar with Apple Calendar
6. Zoho Calendar (Best free calendar for Zoho app users)
Zoho Calendar is a simple, business-friendly scheduling application that allows teams to arrange events, share calendars, and collaborate across departments. As part of the Zoho productivity ecosystem, it works especially effectively for businesses using tools like Zoho Mail, CRM, or Project.
From managing team calendars to arranging meeting rooms, Zoho Calendar offers a professional scheduling experience free of clutter. It supports two-way syncing with external calendars and offers strong admin controls for managing user access and permissions.
Additionally, you can use a custom domain and attach files through Zoho WorkDrive—features that make it feel more like a full productivity suite than just a calendar.
Zoho Calendar best features
- Create and manage group calendars to manage meetings, deadlines, and team events
- Add buffer time between back-to-back events using the Rapid Events feature
- Share calendars privately or publicly and embed them on websites for easy access
- Choose from multiple views—day, week, month, agenda, and even multi-month layouts
- Schedule and join online meetings via Zoom, Zoho Meeting, or other integrations
Zoho Calendar limitations
- The mobile version lacks some features available on the desktop interface
- Syncing with non-Zoho platforms like Outlook or Apple Calendar requires manual setup
Zoho Calendar pricing
- Free
Zoho Calendar ratings and reviews
- G2: 4.4/5 (60+ reviews)
- Capterra: Not enough reviews
🧠 Fun Fact: A notable 70% of adults use digital calendars to manage their everyday lives, demonstrating how important these tools are in modern time management.
📚 Also Read: Best Calendar Management Tools to Stay Organized
7. Amie (Best minimalist calendar combining tasks, email, and scheduling)
Amie takes a different approach to productivity by blending calendars, tasks, music, and emails into a single app. Designed for folks who want more than just a calendar, its minimalist interface offers a clean canvas for handling your schedule without distraction.
Manage personal and work events in the same view, with support for both shared and private calendars. Amie also allows you to attach files, block time automatically, and even add Spotify playlists to events for a personal touch.
Amie’s time management is also supported by integrated tools like a Pomodoro timer and AI-assisted meeting note-taking, which immediately converts discussion points into scheduled to-dos
Amie best features
- Manage calendar and to-do lists side by side for easy time-blocking
- Create recurring habits or goals tied to your calendar
- Use AI-powered scheduling to auto-place tasks in optimal time slots
- Collaborate using calendar comments and mentions
- Provide scheduling links to easily share availability with external parties.
Amie limitations
- It lacks advanced project management tools like dependencies or timeline views
- There are limited customization options compared to more robust productivity suites
- The primary design and feature focus is on individual productivity, which may offer less depth for large-scale corporate scheduling and resource management
Amie pricing
- Pro: $25/month per user
- Business: $50/month per user
- Enterprise: Custom pricing
Amie ratings and reviews
- G2: Not enough reviews
- Capterra: Not enough reviews
💡 Pro Tip: Implementing strategic productivity hacks helps conquer procrastination, sharpens your focus, and optimizes project timelines. Incorporating these methods into your daily workflow allows for enhanced planning and a more efficient path to achieving your objectives.
8. Any.do (Best task-centric calendar with daily planning and cross-platform syncing)
Any.do is a versatile task management program that integrates to-do lists, calendar scheduling, and collaboration capabilities into a single, easy-to-use platform.
Made for both personal and business use, it assists people and teams in efficiently organizing activities, setting reminders, and managing projects. The “My Day” feature encourages a daily review of events and tasks, prompting users to prioritize and schedule their day proactively.
Any.do is compatible with various platforms, including iOS, Android, macOS, Windows, and web browsers, allowing seamless task and event synchronization. Built-in reminders and recurring tasks help turn your calendar into a powerful planning tool.
Any.do best features
- Organize tasks, subtasks, and reminders in a clean, drag-and-drop interface
- Use voice commands to add tasks or schedule events—ideal for busy professionals.
- Enable AI-driven suggestions to optimize your schedule
- Set one-time, recurring, and location-based reminders for both events and tasks
- Synchronize seamlessly with multiple external calendar platforms like Google and Outlook
Any.do limitations
- Many useful features, like recurring tasks and location-based reminders, are paywalled
- The tool has occasional sync delays with external calendars
Any.do pricing
- Personal: Free
- Premium: $7/month
- Family: $9.99/month for four users
- Teams: $7.99/month per user
Any.do ratings and reviews
- G2: 4.2/5 (190+ reviews)
- Capterra: 4.4 (180+ reviews)
What are real-life users saying about Any.do?
A Capterra review says:
📚 Also Read: Any.do Alternatives and Competitors
9. Teamup Calendar (Best for managing shared team schedules and resources)
The Teamup Calendar has been developed to organize team and group schedules without requiring user logins for every participant. It offers customizable access links so only you—or your entire team—can view or edit specific calendars.
The tool is an excellent fit for clubs, volunteer groups, or project-based teams needing multiple calendars under one umbrella. Embed Teamup calendars into websites, set color-coded sub-calendars, and even automate email digests to keep stakeholders informed.
Teamup Calendar best features
- View schedules in 11 different formats, including timeline, table, and multi-day views
- Create color-coded sub-calendars for different teams, resources, or events
- Set 9 different access permission levels for secure calendar sharing
- Book resources like meeting rooms or equipment directly within the calendar
- Share calendars securely using unique, configurable links without requiring a user account
- Support sophisticated time zone handling for geographically dispersed teams
Teamup Calendar limitations
- Limited mobile app functionality compared to the desktop app
- Lacks built-in integration with cloud storage services
Teamup Calendar pricing
- Free
- Plus: $12/month, billed annually
- Pro: $30/month, billed annually
- Business: $70/month, billed annually
- Enterprise: $120/month, billed annually
Teamup Calendar ratings and reviews
- G2: 4.5/5 (30+ reviews)
- Capterra: 4.7/5 (40+ reviews)
What are real-life users saying about Teamup Calendar?
A G2 review says:
📚 Also Read: Shared Calendar Apps to Streamline Your Schedule
10. Business Calendar 2 (Best for deep Android calendar customization and task control)
Business Calendar 2 is a calendar and task management app for Android users. It provides extensive customization, intelligent scheduling features, and smooth integration with Google Calendar, Outlook, and Exchange.
Its core strength in scheduling lies in its wide range of views (month, week, day, year, agenda, tasks) and its flexible widget options, which provide quick, glanceable access to a user’s schedule. For time management, the application offers a “heat map” in the year view to quickly identify busy and free days, aiding in long-term planning.
Whether managing your agenda or juggling professional meetings, Business Calendar 2 gives you the flexibility and control to plan your day precisely.
Business Calendar 2 best features
- Utilize a month calendar view to get a comprehensive overview of your schedule
- Set recurring events with flexible rules, accommodating complex scheduling needs
- Move and copy appointments efficiently using drag-and-drop functionality
- Attach files and photos to calendar events, keeping all relevant information in one place
- Input new events using a powerful voice input feature, reducing manual entry time
- Choose from multiple home screen widgets and 14 UI themes for personalized access
Business Calendar 2 limitations
- It is available only on Android, with no iOS or desktop version
- Many users find the ads included in the free version to be quite distracting
Business Calendar 2 pricing
- Free
- Pro: One-time payment of $4.99
Business Calendar 2 ratings and reviews
- G2: Not enough reviews
- Capterra: Not enough reviews
➡️ Read More: Best Task Scheduling Software for Task Managers
Summarize this article for me please🎯 Other Proton Calendar Alternatives:
- Cal.com (Best for privacy-focused scheduling with open source flexibility)
- Morgen (Best for integrating tasks and calendars in a sleek desktop app)
- TimeHero (Best for automatic scheduling based on workload and priorities)
- SkedPal (Best for time-blocking and dynamic rescheduling)
- Tweek Calendar (Best for minimalist weekly planning and distraction-free focus)
Juggling several calendars? This video shows you how to do it efficiently.
Summarize this article for me pleaseChoose Your Best Proton Calendar Alternative With ClickUp
Finding a great Proton Calendar alternative depends on your workflow, preferences, and platform requirements. If privacy is your priority, tools like Fantastical and Apple Calendar make things safe and straightforward, but you may want to explore options with more features. Google Calendar, Outlook, and Zoho Calendar have robust scheduling tools that allow greater flexibility, collaboration, and cross-platform access.
However, if you’re searching for an all-in-one solution that combines calendar management, task tracking, and team collaboration, ClickUp is the clear pick. With its sophisticated AI-powered calendar, integrations, and task management, ClickUp allows you to manage your time more effectively without switching between tools.
Sign up for free today to transform your calendar into a productivity powerhouse!
Everything you need to stay organized and get work done.
