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

Open Startups
Open Startup List
Starter Story
Startup Stash
Indie Hackers
Oye Startups
Startup Tracker
A collection of open startups

Which is more popular?
Based on our record, CodePen seems to be a lot more popular than OpenStartup.dev. While we know about 513 links to CodePen, we've tracked only 3 mentions of OpenStartup.dev.
Website, pricing, platforms and company facts side by side.
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| Website | codepen.io | openstartup.tm |
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What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
No analysis of OpenStartup.dev yet.
Walkthroughs and reviews on video.
What Is Codepen?
More videos
No OpenStartup.dev videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using CodePen and OpenStartup.dev. 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 OpenStartup.dev 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
This is called open startup.. you can see a list at https://openstartup.tm. - Source: Hacker News / about 3 years ago
I don't know about _fully open_, but I think Buffer is an example of a company that shares unusually much. https://buffer.com/resources/revenue-dashboard/ There's some sort of list at https://openstartup.tm/ but I think a lot of... - Source: Hacker News / about 4 years ago
- https://openstartup.tm/ pros: if you're an early adopter, it's nice to know how the service you're investing time in is doing financially. One of the biggest risks of choosing a new/unknown service, as a consumer, is that it will... - Source: Hacker News / over 4 years ago
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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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Learn how others are building successful e-commerce businesses.
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