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

Pocket Universe
Revoke.cash
Web3Antivirus.io
phishield
Signed Pages
Wallet Guard App
Protect your Web3 assets before you sign. Messiah scans sites, intercepts wallet signing requests, and checks addresses — detecting phishing and drainers in real time.

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 | onesavie.com |
| Pricing | — | |
| Company | — | Startup from Taiwan · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodePen yet.
Messiah is a browser extension that protects your Web3 assets by detecting threats in real time — before you sign anything. Site Scan — Run a scan before connecting your wallet. Messiah extracts the page structure, visible text, and external resources, then runs an AI analysis to detect: Phishing...
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
No Messiah 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.


As answered by people managing CodePen and Messiah.
Messiah's answer:
Messiah protects the exact moment a user gets deceived. Beyond domain blocklists, it:
Messiah's answer:
Most tools rely on blocklists or transaction simulation alone. Messiah combines both with AI content analysis:
We benchmarked it against 100 live scam sites (90% detection) and published the gaps we found — so you know exactly what it catches and what it doesn't.
Messiah's answer:
Messiah's answer:
Messiah was born from the $1.5B Bybit hack — the largest crypto theft in history, executed through a compromised front-end that made signers approve something they couldn't see.
At ETHGlobal Taipei 2025, our team built a proof-of-concept recreating that exact attack: a simulated wallet front-end with injected malicious logic, and an AI pipeline that analysed the front-end JavaScript to catch it. The project won the HashKey Chain Award (On-Chain Infrastructure Compliance Innovation) and the Celo L2 Pool Prize.
We then joined Cyberport's Web3 Pilot Scheme and spent months turning the PoC into a real product — benchmarking it against 100 live scam sites and publishing what it caught and what it missed — before launching on the Chrome Web Store.
Messiah's answer:
Messiah's answer:
Share your experience with using CodePen and Messiah. 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 Messiah 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 Messiah since Jul 2026.
When comparing CodePen and Messiah, you can also consider the following products.

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



To use Ethereum tokens in DeFi you have to grant an allowance to spend tokens on your behalf.
Compare Revoke.cash to CodePen or Messiah:

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 Messiah:

Navigate Web3 safely with our AI- and human-powered extension that audits smart contracts and domain names on the go, detects if they carry suspicious logic or are associated with malicious activity, and sends you corresponding alerts.
Compare Web3Antivirus.io to CodePen or Messiah: