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Programming exercises for experienced engineers.

Pocket Universe
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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, CodeCrafters seems to be more popular. It has been mentioned 12 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codecrafters.io | onesavie.com |
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| Company | — | Startup from Taiwan · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodeCrafters 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.


No features have been listed yet.
An editorial look at what each product does well and who it suits.


No analysis of CodeCrafters yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Learn to Build Real Software With CodeCrafters
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CodeCrafters 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 CodeCrafters and Messiah. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


This whole thing started as a CodeCrafters challenge. What was supposed to be a quick weekend project turned into me staring at dup2() man pages at 2 AM, wondering why my pipes were freezing the whole terminal. Good times. - Source: dev.to / about 18 hours ago
Sometime ago, I decided to embark on a new endeavor, I was curious about how shell works, and came across the the codecrafters.io build your own shell challenge, and thought this is a good opportunity for me to learn shell, as well as... - Source: dev.to / 20 days ago
Submitting with git push also exists at CodeCrafters, for code you write from scratch. - Source: dev.to / 30 days ago
Tracking Messiah since Jul 2026.
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