
JSFiddle
CodeSandbox
GitHub
replit
VS Code
Pastebin.com
JS Bin
A front end web development playground.

Ntfy
Pushover
Gotify
LogSnag
Real-Time Monitoring for Your Business, Live on Your Lock Screen

Which is more popular?
Based on our record, CodePen seems to be more popular. It has been mentioned 513 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codepen.io | activitysmith.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodePen yet.
Send Push Notifications to your devices for any business or operational event, from new signups and feature adoption to operational failures. Monitor live metrics and long-running processes like deployments and automations with Live Activities
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
What Is Codepen?
More videos
Meet ActivitySmith: Real-time Backend Progress and Events for You and Your Team
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CodePen and ActivitySmith.
ActivitySmith's answer:
Developers, DevOps, technical teams, CTOs
ActivitySmith's answer:
ActivitySmith is the stronger choice for internal engineering and operations teams that want more than just notifications. Live Activities, Rich Push Notifications, Lock Screen Widgets, channels, and official SDKs make it a better fit when backend workflows need to stay visible while they run.
ActivitySmith's answer:
ActivitySmith offers not only push notifications, but essentially full control over users' lock screen. Live Activities are powerful way to monitor long-running tasks in a real time.
Share your experience with using CodePen and ActivitySmith. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Codepen is a social network for developers to show off their work, ask and answer questions, and exchange ideas. It's like a Reddit for coding and design, with a large community of talented web developers.
Codepen is a social development environment that allows developers to showcase their work and experiment with HTML, CSS, and JavaScript in a collaborative space. Codepen’s focus on visual and interactive development...
Codepen is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn.
We have no reviews of ActivitySmith yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


> I vividly remember IE and many hacks to have css elements properly working in it… The common advice now is to only use CSS that is supported in the last two major versions of each major browser. You can check any css property's support... - Source: Hacker News / 2 months ago
Thank you, heartfelt... For sharing an artwork, a miracle! Just in case, have you considered publishing the work at platforms as CodePen, where genius Artists/People express their art, too, as you?: // https://codepen.io/. - Source: Hacker News / 3 months ago
Embed on DEV: If you prefer CodePen embed, create a Pen with that HTML and add to the post as: {% codepen https://codepen.io//pen/ %}. - Source: dev.to / 12 months ago
Tracking ActivitySmith since Jul 2026.
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Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
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a simple self-hosted server for sending and receiving messages
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