Software Alternatives, Accelerators & Startups

replit VS CustomTkinter

Compare replit VS CustomTkinter and see what are their differences

replit logo replit

Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages โ€” without spending a second on setup.

CustomTkinter logo CustomTkinter

CustomTkinter is a python desktop UI-library based on Tkinter, which provides modern looking and fully customizable widgets.
  • replit Landing page
    Landing page //
    2023-07-30
  • CustomTkinter Landing page
    Landing page //
    2026-07-16

replit features and specs

  • Ease of Use
    Replit offers an intuitive interface that makes it easy to start coding without needing to set up development environments. This can significantly lower the barrier to entry for beginners.
  • Collaborative Coding
    Replit facilitates real-time collaboration, allowing multiple users to work on the same codebase simultaneously, similar to tools like Google Docs.
  • Supports Multiple Languages
    Replit supports a wide range of programming languages including Python, JavaScript, C++, and many more. This makes it flexible for users with different needs.
  • Cloud-Based
    Being a cloud-based platform, Replit enables users to access their code from any device with an internet connection, eliminating the need for local storage.
  • Built-in Package Manager
    Replit comes with built-in package managers for various languages, making it easier to include third-party libraries and dependencies.
  • Educational Tools
    The platform offers various resources for educators, such as interactive coding environments and classroom management tools, making it ideal for academic settings.

Possible disadvantages of replit

  • Performance Limitations
    Being a cloud-based IDE, Replit may encounter performance issues for larger projects or those requiring intensive computational resources.
  • Limited Customization
    The environment may lack some customization options and advanced settings available in traditional, locally-installed IDEs.
  • Dependency on Internet
    Since it's cloud-based, an active internet connection is mandatory for coding, which can be a drawback in situations with unreliable internet access.
  • Privacy Concerns
    Hosting code on a third-party platform may raise privacy and security issues, especially for proprietary or sensitive projects.
  • Subscription Costs
    While Replit offers a free tier, advanced features, higher resource limits, and premium support come at a subscription cost, which may be a barrier for some users.
  • Limited Debugging Tools
    The platform's debugging tools may not be as robust as those available in more established, dedicated IDEs.

CustomTkinter features and specs

  • Modern UI Appearance
    CustomTkinter provides a modern, flat, and visually appealing look for Tkinter applications, with rounded corners, better color schemes, and improved widget styling compared to standard Tkinter.
  • Easy Transition from Tkinter
    Since it's built on top of Tkinter and uses similar syntax and widget names, developers familiar with Tkinter can easily transition to CustomTkinter without a steep learning curve.
  • Built-in Dark and Light Mode
    CustomTkinter supports automatic and manual switching between dark and light appearance modes, making it easy to create apps that adapt to system themes or user preferences.
  • Customizable Themes
    The library allows for extensive customization through theme files (JSON), enabling developers to create and apply custom color schemes and styles across their entire application.
  • Cross-Platform Compatibility
    CustomTkinter works across Windows, macOS, and Linux, providing a consistent look and feel across different operating systems, which is an improvement over native Tkinter's platform-dependent appearance.

Possible disadvantages of CustomTkinter

  • Limited Widget Set
    Compared to more mature GUI frameworks like PyQt or Kivy, CustomTkinter offers a smaller set of widgets, which may require additional custom development for complex applications.
  • Performance Overhead
    The additional styling and rendering logic on top of Tkinter can introduce slight performance overhead, especially in applications with many widgets or frequent UI updates.
  • Dependency on Tkinter Limitations
    Since it's built on Tkinter, CustomTkinter inherits some of Tkinter's inherent limitations, such as less flexible layout management and fewer built-in animations compared to modern frameworks.
  • Smaller Community and Ecosystem
    As a relatively newer library, CustomTkinter has a smaller community, fewer third-party extensions, and less extensive documentation compared to more established GUI frameworks.
  • Occasional Bugs and Inconsistencies
    Being under active development, users may encounter occasional bugs, inconsistent behavior across platforms, or breaking changes between version updates that require code adjustments.

Analysis of CustomTkinter

Overall verdict

  • CustomTkinter is a solid choice for Python developers who want to build modern-looking desktop GUIs without leaving the familiar Tkinter ecosystem. It provides a good balance between ease of use and visual polish, making it especially attractive for smaller to medium-sized projects.

Why this product is good

  • Built on top of standard Tkinter, so it's easy to learn if you already know Tkinter
  • Provides modern, flat-styled widgets with rounded corners and better default aesthetics than vanilla Tkinter
  • Supports light and dark mode theming out of the box, including system theme detection
  • Cross-platform support for Windows, macOS, and Linux
  • Actively maintained with regular updates and a growing community
  • Free and open-source with a permissive license
  • Good documentation and examples to help beginners get started quickly
  • Customizable color themes and widget appearance without needing CSS-like styling

Recommended for

  • Python developers who want a quick way to modernize Tkinter-based UIs
  • Hobbyists and students building desktop apps for personal or academic projects
  • Small business or indie developers creating internal tools or utilities
  • Developers who prefer lightweight GUI frameworks over heavier alternatives like PyQt or Kivy
  • Projects that need dark mode support without complex theming systems
  • Anyone already familiar with Tkinter looking for an easy upgrade path

replit videos

Repl.it SciTech Talk | MIT Arab SciTech 2019

More videos:

  • Review - KaBooM! by Swag Bags
  • Review - First Step Coding intro to Repl.it
  • Review - Kaboom Mold And Mildew With Bleach Review
  • Review - Kaboom Review with the Game Boy Geek

CustomTkinter videos

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Category Popularity

0-100% (relative to replit and CustomTkinter)
Programming
100 100%
0% 0
Rapid Application Development
Developer Tools
100 100%
0% 0
IDE
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 replit and CustomTkinter

replit Reviews

  1. Monkeyman666
    ยท sysadmin at dagul ยท
    Nice web hosting for small website [non production]

    easy setup.

    ๐Ÿ Competitors: Heroku
  2. very good for my kids

11 Best AI Coding Assistants: Top Tools Every Developer Needs in 2025ย 
Replitโ€™s Ghostwriter is used in browser-based coding environments where simplicity and instant collaboration matter most. Itโ€™s a natural fit for education, prototyping, or remote work where installation isnโ€™t practical but fast feedback is still essential.
Source: blog.devart.com
8 Best Replit Alternatives & Competitors in 2022 (Free & Paid) - Software Discover
Replit is a simple yet powerful online ide, editor, compiler, interpreter, and repl. Code, compile, run, and host in 50+ programming languages. The collaborative browser based ide โ€“ replit.
12 Best Online IDE and Code Editors to Develop Web Applications
Moreover, the moment you are ready with the code, it instantly goes live to the world. If you also want to learn about code, Replit has more than three million technologists, creatives, passionate programmers, and more. With real-time collaboration with your teams, your team will be more productive. Additionally, you can create applications, bots, etc., with the help of...
Source: geekflare.com
Best Online Code Editors For Web Developers
Replit allows users to write code and build apps and websites using a browser. The site also has various collaborative features, including capability for real-time, multiuser editing with a live chat feed.
Source: techarge.in

CustomTkinter Reviews

We have no reviews of CustomTkinter yet.
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Social recommendations and mentions

Based on our record, replit seems to be more popular. It has been mentiond 650 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.

replit mentions (650)

  • Pizza delivery driver built triple OS where folders SOLIDIFY at 5% capacity
    โ€ข Memory leak? Folder hits 5% โ†’ SOLIDIFIES โ†’ delete clean Code: https://replit.com/@clydetosspon/tripleos [after you make Replit] Neuromorphic chip makers: this matches your spike physics perfectly (0W idle) Full story in comments. AMA! - Source: Hacker News / 4 months ago
  • Show HN: One provider starts lying at request 50. The quorum catches it
    Two regions. Six hubs. Six providers. One of them starts lying after request 50. The quorum catches it. Authority never moves. NUVL fronts compute bindings and forward only. Hubs relay and fan out โ€” no authority, no policy. Providers are the only execution authorities. When Provider_B starts flipping reported outcomes, the 2-of-3 quorum audit detects the drift without promoting hubs into decision-makers. The drift... - Source: Hacker News / 5 months ago
  • Introduction to Linux for Data Engineers
    Replit is an example of an online code editor, where you can write your code and access the Linux shell at the same time. - Source: dev.to / 6 months ago
  • Guide to AI Coding Agents & Assistants: How to Choose the Right AI Tool
    Replit offers a cloud IDE with an AI assistant for code explanations and incremental edits, plus the Agent that can generate full-stack applications from natural language. The agent performs extended reasoning and uses self-testing to refine its work. Developers can build other agents and automation workflows inside Replit. - Source: dev.to / 7 months ago
  • ๐Ÿš€ Vibe Coding Mistakes (When Using AI Tools) and How to Avoid Them
    Replit (2024) Replit AI Tools [Software]. Available at: https://replit.com (Accessed: 12 January 2025). - Source: dev.to / 8 months ago
View more

CustomTkinter mentions (0)

We have not tracked any mentions of CustomTkinter yet. Tracking of CustomTkinter recommendations started around Jul 2026.

What are some alternatives?

When comparing replit and CustomTkinter, you can also consider the following products

Lovable - The world's first AI Fullstack Engineer

PyQt - Riverbank | Software | PyQt | What is PyQt?

VS Code - Build and debug modern web and cloud applications, by Microsoft

Kivy - Open source Python framework for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps. Installation on WindowsInstallation on Windows. Installation; What are wheels .

Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.

Qt - Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.