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

ZeroFOX
Bolster
PhishEye
DoppelDown
AgentProxy.au
Red Points
Bustem
By pairing cutting-edge AI with expert analysis, we outpace threats like phishing, impersonation, and disinformation—delivering comprehensive coverage, speed, and precision.

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.
|
|
|
|
|---|---|---|
| Website | codepen.io | doppel.com |
| Platforms | — | |
| Company | — | Startup from the United States · 250 - 499 employees |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodePen yet.
Our AI-native platform unifies threat intelligence, automates takedowns, simulates attacks, and trains employees against today’s most sophisticated multi-channel deception campaigns.
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
Doppel: Outpacing What’s Next in Social Engineering
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CodePen and Doppel.com.
Doppel.com's answer:
AI-native platform unifies threat intelligence, automates takedowns, simulates attacks, and trains employees against today’s most sophisticated multi-channel deception campaigns.
Share your experience with using CodePen and Doppel.com. 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 Doppel.com 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 Doppel.com since Jan 2026.
When comparing CodePen and Doppel.com, you can also consider the following products.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
Compare JSFiddle to CodePen or Doppel.com:

ZeroFOX is a social risk management tool that enables organizations to identify, manage and mitigate social media based cyber threats.
Compare ZeroFOX to CodePen or Doppel.com:

Peer-to-peer texting at scale for campaigns + organizations
Compare Bolster to CodePen or Doppel.com:

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.
Compare GitHub to CodePen or Doppel.com:

AI phishing detection, typosquat & domain monitoring, and coordinated takedowns. PhishEye protects your brand across web, ads, social, and search — built for security, fraud, and brand protection teams.
Compare PhishEye to CodePen or Doppel.com: