Software Alternatives, Accelerators & Startups

Cal.com VS NextUI

Compare Cal.com VS NextUI and see what are their differences

Cal.com logo Cal.com

Cal.com (formerly Calendso) is the open source Calendly alternative.

NextUI logo NextUI

NextUI is the next-gen UI React library that allows you to make beautiful websites regardless of your design experience, comes with awesome features like Auto Dark Mode recognition, Themes support, easy customization, Best-in-class DX and much more.
  • Cal.com Landing page
    Landing page //
    2023-10-08
  • NextUI Landing page
    Landing page //
    2023-08-03

Cal.com features and specs

  • Customizable
    Cal.com allows extensive customization to fit various branding and scheduling needs, which makes it adaptable for different types of users including businesses and individuals.
  • Open-source
    Being an open-source platform, Cal.com provides the flexibility for developers to modify and extend the software as per their specific needs, fostering a collaborative development environment.
  • Integrations
    Cal.com offers a wide range of integrations with other software tools like Google Calendar, Microsoft Outlook, and Zoom, enhancing its functionality and making it easier to fit into existing workflows.
  • User-friendly Interface
    Cal.com has an intuitive and clean interface that makes it easy for users of all technical skill levels to set up and manage their scheduling.
  • Privacy-focused
    Cal.com emphasizes data privacy, ensuring user information is handled securely, which is crucial for users who need to comply with regulations like GDPR.

Possible disadvantages of Cal.com

  • Learning Curve
    Although it is highly customizable, the plethora of options and features may result in a steeper learning curve for new users who are not familiar with such scheduling tools.
  • Limited Free Version
    The free version of Cal.com comes with limitations that may not be sufficient for growing businesses or advanced users who require more comprehensive features.
  • Dependency on Integrations
    Cal.com's effectiveness heavily depends on its integrations. Without these integrations, some users might find the tool less useful or incomplete, especially if their primary tools are not supported.
  • Support
    While open-source has many benefits, it may also mean that immediate, personalized support could be limited compared to fully commercial solutions. This might pose a challenge for users needing quick resolutions.
  • Performance
    As an open-source platform, the performance might vary depending on how it is hosted and managed. Suboptimal configurations could lead to slower performance or downtimes.

NextUI features and specs

  • Modern Design System
    NextUI offers a modern design system that helps developers create aesthetically pleasing and highly functional user interfaces effortlessly.
  • Customizability
    Its components are highly customizable, allowing developers to tailor the UI to match their specific design requirements.
  • Easy Integration
    NextUI integrates well with popular frontend frameworks like React, making it easy to incorporate into existing projects.
  • Responsive Design
    The components in NextUI are designed to be responsive, ensuring that applications look good on all screen sizes.
  • Extensive Documentation
    NextUI provides comprehensive documentation, which helps developers understand and implement its components effectively.

Possible disadvantages of NextUI

  • Learning Curve
    Despite its documentation, some developers might face a learning curve when adapting to NextUI's design patterns and customization options.
  • Community Size
    Being a relatively newer tool, NextUI might not have as large a community as some other UI frameworks, potentially limiting community-driven support and resources.
  • Limited Third-Party Extensions
    Compared to more established UI frameworks, NextUI might have limited third-party extensions or plugins for extending its functionality.
  • Potential for Overhead
    Using a full-fledged UI framework like NextUI might introduce higher overhead compared to smaller, more lightweight component libraries.
  • Version Stability
    As with many newer technologies, there might be concerns regarding the stability and frequency of major version updates.

Analysis of Cal.com

Overall verdict

  • Cal.com is generally considered a good option for scheduling and calendar management.

Why this product is good

  • Cal.com is praised for its open-source nature, allowing for greater customization and integration flexibility. It offers a user-friendly interface and supports various calendar integrations, making it a versatile tool for individuals and businesses alike.

Recommended for

  • Freelancers who need a simple yet effective scheduling tool.
  • Small businesses looking for a customizable scheduling solution.
  • Developers who appreciate open-source software and need a tool they can modify.
  • Businesses seeking a platform that can integrate with existing tools and workflows.

Analysis of NextUI

Overall verdict

  • Overall, NextUI is a solid choice for developers seeking a contemporary and efficient component library for their React projects. Its emphasis on customization, performance, and ease of use makes it a valuable tool for enhancing user interfaces.

Why this product is good

  • NextUI is considered good because it offers a modern, customizable, and lightweight component library tailored for React applications. It provides developers with a variety of pre-designed components, enhancing development speed and consistency while maintaining a high level of performance. Additionally, NextUI's responsive design capabilities and focus on accessibility make it a desirable choice for building visually appealing and user-friendly web interfaces.

Recommended for

    NextUI is recommended for React developers who value flexibility and performance in UI design, especially those working on projects that require scalability and a professional appearance. It is particularly well-suited for teams looking to streamline their UI development process with a comprehensive set of pre-designed components.

Cal.com videos

What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages

More videos:

  • Review - Cal.com Version 1.0 Launch Event

NextUI videos

No NextUI videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Cal.com and NextUI)
Appointments and Scheduling
Design Tools
0 0%
100% 100
Calendar And Scheduling
100 100%
0% 0
Developer Tools
0 0%
100% 100

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Cal.com and NextUI

Cal.com Reviews

Acuity Scheduling alternatives for businesses outgrowing it
The honest read: if you're leaving Acuity because your business outgrew simple scheduling โ€” you need deposits, add-ons, multiple staff and locations, and ideally a booking site you own โ€” Opencals is built for exactly that transition, and pay-as-you-go means it costs nothing until you're earning. If you're leaving for a narrower reason, match it precisely: SimplyBook.me for...
Source: opencals.com
I've poked around a while ago at some Calendly alternatives (specifically was lo... | Hacker News
I tried using https://cal.com for a bit but ended up just switching over to https://zcal.co and it has been great so far. All these other scheduling tools end up trying to do too much and always seem to end up a bit clunky and charge absurd amounts for it

NextUI Reviews

10 Best Free React UI Libraries in 2023
NextUI is a React and Next.js UI library that gives you amazing components to build beautiful and modern websites. If you are someone who is obsessed with building great designs, NextUI is one of the best options. The whole library is built keeping the design factor in mind.
React UI Components Libraries: Our Top Picks for 2023
Customization: Since NextUI is developed on top of CSS-in-JS library Stitches, itโ€™s easy to customize the components either through the CSS prop, native CSS selectors, or styled function. In addition, you will get a set of Stitches utilities out of the box to accelerate your workflow by grouping CSS properties together, shortening CSS properties, or simplifying a complex...
Source: kinsta.com

Social recommendations and mentions

Based on our record, Cal.com should be more popular than NextUI. It has been mentiond 60 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Cal.com mentions (60)

  • "You Wouldnโ€™t Steal a DIV": How I Built My Portfolio
    Then for the component library, I was really into coss ui. I stumbled upon it randomly one day and loved it so much. My Nathan's AI project already had a UI heavily inspired by cal.com: send button, message suggestions... So when I saw they had a shadcn/ui library with that kind of style, it was perfect for what I needed. - Source: dev.to / 4 months ago
  • AI Almost Sold Me a Subscription I Didn't Need
    I keep coming back to what would have happened if I didn't have a strong technical understanding of how calendar technology works โ€” the difference between local and cloud calendars, what an ICS feed is, why enterprise auth blocks third-party integrations. If this was many years ago before I gained all this experience, I would have stopped at the first confident answer from my search tool, installed one of those... - Source: dev.to / 5 months ago
  • Introducing Quackback: Open-Source Feedback Platform with a Built-in MCP Server
    Plausible brought open source to web analytics. Cal.com did it for scheduling. Formbricks did it for surveys. PostHog did it for product analytics. Quackback does it for feedback collection. - Source: dev.to / 5 months ago
  • ๐Ÿค Learn Front-End by Doing: Contribute to Cal.com's Open Source...๐Ÿš€
    In this tutorial, we'll be focusing on Cal.com:. - Source: dev.to / 12 months ago
  • 5 Side Project Ideas for Developers to Monetize as Micro-SaaS in 2025
    Take Cal.com (https://cal.com/), formerly known as Calendso. It started as an open source alternative to Calendly which offers a free, self-hostable version for users. - Source: dev.to / over 1 year ago
View more

NextUI mentions (24)

  • React UI Component Libraries in 2025
    Optimized for use with Next.js, Next UI has become a popular choice for developers building React applications with server-side rendering and static site generation. - Source: dev.to / over 1 year ago
  • Building Micro Frontends with Vite, React, and TypeScript: A Step-by-Step Guide
    Next, we install the dependencies, but this time weโ€™ll add @nextui and framer-motion:. - Source: dev.to / almost 2 years ago
  • ๐Ÿš€ Introducing NextSolution V2: ASP.NET API + Next.js + Expo Starter Template
    Use NextUI Components Since we're using NextUI, you can refer to the following documentation to get started with its components and features: Getting started with NextUI. - Source: dev.to / almost 2 years ago
  • NextUI Theme Generator
    I've been using NextUI for quite some time, but I missed having a theme generator like other component libraries have. - Source: dev.to / about 2 years ago
  • Frontend resources! ๐Ÿš€
    NextUI: Craft beautiful interfaces effortlessly with NextUI. - Source: dev.to / about 2 years ago
View more

What are some alternatives?

When comparing Cal.com and NextUI, you can also consider the following products

Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.

Chakra UI - Simple, modular and accessible UI components for your React applications.

TidyCal - Optimize your schedule with custom booking pages and calendar integrations

Mantine - React library, 60+ hooks and components with dark theme support and focus on accessibility

Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.

Ant Design - An enterprise-class UI design language and React implementation with a set of high-quality React components, one of best React UI library for enterprises