Compare Callum vs. Let's Calendar

Streamline event calendar management and online registration with Trumba. It's perfect for virtual, in-person or hybrid events. Trumba offers an innovative and highly customizable event calendar platform preferred by colleges and universities, hospitals and health systems, local government, communities and other organizations worldwide. Trumba also offers a HIPAA-compliant solution for hospitals and healthcare organizations and will enter into a BAA with covered entities. Trumba calendars can be easily embedded into your website or published as fully-hosted pages that match your online branding. Attendees can easily find events, subscribe to calendars, register/pay and stay informed of changes. Trumba can integrate with other calendars to provide a one-stop experience for your users and optimize workflows internally. Trumba customers love the ease of implementation services and ongoing customer support. Online demos and free trials are available upon request (no credit card info required).

Secure your company’s communications with Proton Mail — the business email solution trusted by over 50,000 organizations. With end-to-end encryption built in, your internal and external communications stay confidential by default. Proton Mail helps your business meet GDPR, HIPAA, and other compliance standards, while giving you full control over your data under strong Swiss privacy laws. Empower your team with encrypted email and calendar, support for your custom email domains, professional branding, and simple migration from providers like Google Workspace or Microsoft 365 — no IT team required.

Google Workspace is an all-in-one cloud productivity platform developed by Google to help businesses manage communication, collaboration, document creation, and workflow automation from a centralized environment. The platform combines professional email, cloud storage, video conferencing, document editing, team messaging, scheduling, and AI-powered assistance into one subscription-based ecosystem optimized for modern work environments. Google Workspace includes applications such as Gmail, Google Drive, Google Meet, Docs, Sheets, Slides, Calendar, Chat, Keep, Forms, Sites, NotebookLM, and Gemini AI, enabling teams to work together seamlessly across devices and locations. One of the platform’s core strengths is its built-in AI functionality powered by Gemini, which helps users draft emails, summarize meetings, generate research insights, automate repetitive tasks, and improve productivity using contextual awareness from workplace data. Google Workspace also supports advanced collaboration features including real-time editing, appointment scheduling, eSignatures, document sharing, cloud storage management, and AI-assisted research tools. Businesses benefit from enterprise-grade security features such as AI-powered threat protection, data classification, endpoint management, Data Loss Prevention, secure access controls, and compliance support for enterprise environments. The platform offers scalable pricing plans suitable for startups, small businesses, enterprises, educational institutions, nonprofits, and government organizations. Google Workspace also simplifies data migration and onboarding with built-in migration tools and partner support for transferring emails, files, and business information securely into the cloud.

Fathom is an AI meeting assistant that helps users capture, summarize, search, and act on meetings with less manual work. The platform creates accurate transcripts, instant summaries, action items, and follow-up notes so users can focus on live conversations instead of taking notes. Fathom supports both traditional meeting capture and bot-free capture through its desktop app. Teams can use Fathom as a shared source of truth across customer calls, internal meetings, strategy sessions, and project conversations. Ask Fathom lets users search across meetings and ask questions about conversations, decisions, commitments, risks, and next steps. The platform also supports topic monitoring so important moments and signals are easier to find. Fathom syncs meeting notes, insights, and action items into tools such as Slack, Salesforce, HubSpot, Notion, Asana, Gmail, Zoom, Google Meet, Microsoft Teams, ChatGPT, Claude, Zapier, and API or MCP workflows. It supports security and compliance needs with SOC 2 Type II, GDPR, HIPAA compliance, SSO, and SCIM. By combining AI notetaking, bot-free capture, transcripts, summaries, integrations, search, and workflow automation, Fathom helps teams move from meetings to execution faster.

Work is broken because your tools are. Dozens of apps, zero shared context, your team stuck playing messenger between all of them. That's not collaboration. That's overhead. ClickUp eliminates the mess. One platform: tasks, docs, chat, goals, time tracking, whiteboards, and AI Agents that work autonomously while you sleep. Everything shares one connected brain. No silos. No duplicated effort. No lost threads. Manage any workflow with custom views, automations, and real-time collaboration baked into every layer. 15+ views including List, Board, Gantt, Timeline, and Calendar. Create rich documents with nested pages and embedded tasks. Set measurable goals with automatic rollups that connect daily output to company objectives. Track time natively with timers, estimates, and workload views that prevent burnout. Over 1,000 integrations plug into your existing stack without adding chaos. GitHub, Slack, Google Drive, Figma, Salesforce, Zoom, and hundreds more — all feeding into one system of record. Built-in AI writes, summarizes, and executes entire workflows on its own. Not a bolt-on — native intelligence woven through every feature. AI Agents handle complex multi-step work around the clock without waiting for humans. SOC 2 Type II certified. SSO/SAML. Custom roles. Audit logs. Scales from five people to fifty thousand. Stop patching a broken system. Start free today. No credit card, no commitment.

Wrike is a powerful work management platform that gives cross-functional teams full visibility into complex projects. Our cloud-based collaboration software software is trusted by 20,000+ leading companies around the world, including tech giants such as Fitbit and Siemens. Wrike boasts a wide range of award-winning features, including dynamic request forms, automated workflows, cross-tagging, custom item types, and 400+ app integrations. Work smarter with Work Intelligence™: our advanced communication software that offers voice commands, smart replies, and document processing. We also offer tailor-made templates to help teams kick-start Agile projects and tick every box for compliance. As well as 99.9% uptime, our enterprise-grade security offers single sign-on, role-based access control, and continuous data backup. For extra peace of mind, you can use the Wrike Lock add-on and gain full ownership of your master encryption key. Wrike has been proven to make organizational processes 40% more efficient, eliminating time-consuming admin work and reducing costs across the board. Discover how it can benefit your team — start your free two-week trial today.

NewOrg is a robust platform that allows non-profit organizations to integrate information from all areas of their operations. This allows them to better manage clients, volunteers, services, donors, donations and outcome. It also provides the ability to schedule activities, sign-ups, communications, surveys and fundraising activities. NewOrg is a powerful platform that can help you manage your committees, donors, events, and memberships to ensure that your organization runs smoothly.

Pensero is a cutting-edge platform that leverages AI to enhance observability and performance analytics, designed specifically for engineering teams and their leaders to gain a deeper understanding of software development processes. It automates the collection and integration of "work signals" from existing tools utilized by your team, including code repositories, issue trackers, and communication platforms, translating disjointed activities into granular insights. These insights are then converted into objective metrics, live dashboards, and comprehensive reports that not only reflect the volume of work completed but also factor in complexity and workflow dynamics. With Pensero, you gain immediate visibility into ongoing projects, contributions from team members, and the overall flow of work within the organization, as well as how team productivity aligns with strategic roadmaps and business objectives. Its seamless integration and scalability enable teams to swiftly transform raw data from various tools into actionable insights that drive performance improvements. Ultimately, Pensero empowers organizations to optimize their software development efforts more effectively than ever before.

Aesthetic Insight is a comprehensive, cloud-based software solution that adheres to HIPAA regulations, specifically designed for medical spas and aesthetic clinics, integrating various functionalities such as scheduling, online booking, point-of-sale, and membership management into a cohesive platform. It allows clinics to manage online appointments with resource-based availability, streamline their intake and consent processes digitally, and oversee bundled service memberships with automated billing features. Additionally, the platform facilitates online product sales through its integrated ecommerce capabilities and enhances client engagement with personalized marketing campaigns. By consolidating front-desk operations, treatment records, and inventory management within a single interface, it simplifies clinic operations significantly. Moreover, the system includes advanced features like calendar management, client segmentation, automated reminders, and tracking for package redemptions, ensuring a seamless experience for both staff and clients. This holistic approach not only improves efficiency but also fosters stronger relationships between clinics and their clientele.

DeskTime is a high-performance, 100% automated time tracking and productivity management solution designed for modern IT teams, software houses, and remote organizations. Unlike traditional trackers that rely on manual "Start/Stop" timers, DeskTime runs silently in the background, logging computer activity from the moment of boot-up to ensure zero data loss and absolute payroll accuracy. ⏱️ 🚀 Key Technical Features: ✅ Fully Automated Tracking: Eliminate manual timesheets. DeskTime captures arrival, departure, and total work hours automatically based on device activity. ⚡ ✅ Productivity Profiling: Categorize URLs, applications, and document titles as Productive, Unproductive, or Neutral. Calculate real-time efficiency scores for individuals and teams. 📈 ✅ Advanced Resource Management: Integrated Shift Scheduling and an Absence Calendar allow HR and team leads to manage leave, vacations, and staffing within a single interface. 📅 ✅ Project & Cost Analysis: Track billable hours at the project and task level. Monitor budget burn rates and export precise reports for client invoicing or CapEx/OpEx accounting. 💸 ✅ Offline Time Logging: Capture time spent in meetings or on-site visits via manual entries or the dedicated mobile app for Android and iOS. 📱 ✅ Enterprise-Grade Security: DeskTime is GDPR compliant and ISO 27001 certified. Features include two-factor authentication (2FA), data encryption at rest and in transit, and optional blurred screenshots to protect employee privacy. 🔒 🛠️ Built for Integration: Seamlessly sync your workflow with top-tier project management and communication tools, including: ⚙️Jira, GitLab, Trello, and Asana. ⚙️Google and Outlook Calendars. ⚙️Custom API for bespoke internal tool integration.