Zealynx Academy vs Cyfrin Updraft: Honest Side-by-Side

TL;DR

• Cyfrin Updraft and Zealynx Academy are both free Web3 security education platforms. They have meaningfully different teaching philosophies and strengths.
• Cyfrin Updraft: explanation-first, video-based, broad Solidity curriculum led by Patrick Collins. Strong for learners who want a structured progression with clear lectures.
• Zealynx Academy: build-first, test-driven, no-video. Strong for learners who already know they want to build and want immediate feedback from a passing/failing test suite.
• The platforms overlap on Solidity fundamentals. They diverge sharply on advanced topics: Cyfrin specializes in security research and CTF-style audit training; Academy specializes in real-protocol reconstruction (Uniswap V2 with 217 tests, Compound V2 with 207), real audit targets (Shadow Arena, 6 forks with 63 documented bugs), AI auditor building (against a 118-Code4rena-finding benchmark), and Web3 founder business education (eMBA).
• Most serious learners use both. The platforms are complements, not substitutes.

Why this matters

The Web3 security education space has matured fast. In 2020, learning Solidity well meant reading the docs, joining a Discord, and hoping you'd run into someone who could explain things. By 2024, multiple high-quality free platforms had emerged. By 2026, the question shifted from "where can I learn?" to "which platform fits my learning style?".

This article is a charitable side-by-side from the team that built Zealynx Academy. The honest answer to "which is better" is: it depends on what you're trying to do. Cyfrin and Academy are aimed at overlapping but distinct slices of the learner population.

If you're considering Web3 security education, this article should help you decide. If you're an existing user of one platform, it might surface what the other has that yours doesn't.

What each platform offers

Cyfrin Updraft

Cyfrin Updraft is the educational arm of Cyfrin, an audit firm. The platform offers:

• Video-based courses led by Patrick Collins (formerly of FreeCodeCamp Solidity courses, now Cyfrin co-founder). Long-form, narrated, with code-along exercises.
• Structured curriculum from beginner Solidity to security research. Clear progression: blockchain basics → Solidity → advanced patterns → audit / security research.
• Free certification based on completed coursework. Some employers and audit firms recognize the certifications as a hiring signal.
• CodeHawks integration. Cyfrin operates CodeHawks, a competitive audit contest platform similar to Code4rena. Updraft's audit curriculum trains for participating in CodeHawks contests.

Strengths:

• Explanation-first pedagogy. The video format lets Patrick explain a concept, then show its application, then have the learner try. Good for learners who absorb concepts via spoken explanation.
• Comprehensive coverage. The curriculum spans more breadth than most alternatives. From "what is a blockchain" through "advanced security research", structured for sequential progression.
• Recognized certifications. Some hiring managers value Cyfrin certifications.
• Active community. Discord with Patrick and other Cyfrin team members engaging with learners.

Zealynx Academy

Zealynx Academy is the educational arm of Zealynx Security, an audit firm. The platform offers four distinct pillars:

• The Build: rebuild production protocols line by line. Currently Uniswap V2 (217 automated tests across 16 sections) and Compound V2 (207 tests across 18 sections). Each section provides starter code with TODO blocks; you write the function bodies until the test suite passes.
• Shadow Arena: audit real past contest forks. Six targets totaling 13,712 lines of Solidity with 63 documented bugs (14 High, 49 Medium). True positives earn points; false positives cost points. Compete on the leaderboard.
• AI Auditor Builder: 12-step interactive guide to building your own AI auditor. Submit it to the Arena, where it's benchmarked against 118 real Code4rena findings (41 High + 77 Medium across 10 contests, 19,200 LoC).
• eMBA: business curriculum for Web3 founders. Module 1 (Protocol Design), Module 2 (Building Team), Module 3 (Security from Day One) shipped; Module 4 (Tokenomics) shipped recently; further modules on roadmap.

Strengths:

• Build-first pedagogy. No videos. The content is text + interactive code with a test suite. The test suite is the teacher: it tells you when you're wrong and when you've got it right.
• Real protocols, real audits. The Build pillar uses actual production protocol code as the reconstruction target. Shadow Arena uses actual past contests. AI Auditor benchmarks against actual Code4rena findings. Nothing is toy.
• Founder-focused content. The eMBA pillar covers business topics most security platforms skip: tokenomics, team building, fundraising, security budgeting.
• No signup until you want it. You can browse and start without an account. Sign up only when you want progress on the public leaderboard.

Where they overlap

The Solidity fundamentals are roughly equivalent on both platforms:

• Variables, types, contracts, inheritance, interfaces.
• Storage vs memory, slot packing.
• External calls, gas costs, EVM mechanics.
• Standard contracts (ERC-20, ERC-721, ERC-1155).
• OpenZeppelin libraries.

If you're learning these for the first time, either platform works. The choice is about format preference (video vs text+test).

Where they diverge

Advanced topics

Cyfrin goes deeper into:

• Foundry-style testing methodology. Patrick Collins is a Foundry advocate; the curriculum teaches Foundry-native patterns extensively.
• Security research narrative. The Updraft curriculum frames security as "spot bugs in CTF-style code", which prepares well for CodeHawks participation.
• Solo learning paths. The video format scales to long sessions; you can binge-watch a course over a weekend.

Zealynx Academy goes deeper into:

• Real protocol reconstruction. Cyfrin doesn't have a Uniswap V2-from-scratch module with 217 tests; this is unique to Academy.
• Audit practice on real forks. Shadow Arena's 63 documented bugs across 6 real protocols (Basin, ElasticSwap, Velodrome, Flux Finance, Canto v2, Venus) is unique to Academy.
• AI auditor construction. Building your own AI auditor with the 118-finding benchmark is unique to Academy.
• Business education for protocol founders. The eMBA pillar is unique to Academy.

Pedagogy style

The most fundamental difference is the medium.

Cyfrin is video-led. You watch Patrick explain a concept, then code along. The pacing is set by the video; you can pause and rewind, but the structure assumes sequential watching.

Academy is text + test-suite-led. You read a short conceptual section, then write code. The test suite is the gating mechanism: you can't progress without passing the tests, and the tests are specific enough to surface what you missed.

Different learners prefer different formats. We've heard from users who tried Cyfrin and found videos too slow; we've heard from users who tried Academy and found text+test too sparse. Neither is wrong; they're aimed at different cognitive styles.

Certifications

Cyfrin issues recognized completion certificates. Some employers value them.

Academy issues ranks (Newcomer through Sovereign) and badges based on completed work. The ranks are public on a leaderboard. Some employers value them; the recognition is more recent and slightly less established than Cyfrin's certifications.

If certifications matter for your goals, Cyfrin has a slight edge (more recognized, longer track record). Both are improving rapidly.

Recommendations

Use Cyfrin if

• You learn best from video lectures.
• You want a recognized certification.
• You prefer a sequential curriculum with clear progression.
• You're interested in CodeHawks participation specifically.
• You want comprehensive Solidity coverage as a single learning thread.

Use Academy if

• You learn best from doing (test-suite feedback).
• You want to rebuild production protocols line by line.
• You want hands-on audit practice on real targets (Shadow Arena).
• You're building a Web3 protocol and want business education (eMBA).
• You're interested in AI auditing.

Use both if

• You're going deep into Web3 security as a career. The platforms cover different parts of the field; mastering both expands the surface area you've practiced.
• You want video for new concepts, then test-suite for solidifying.
• You're a beginner: Cyfrin for foundational explanation, Academy for hands-on application.

This is the most common path among the serious learners we've talked to. Cyfrin handles the "explain to me what this is" half. Academy handles the "now make me prove I can build it" half.

Related questions

Are there other free platforms? Yes. Speedrun Ethereum, Solidity by Example, OpenZeppelin's Ethernaut are all worth using. Cyfrin and Academy are the most comprehensive of the free platforms in 2026, but the field is wider than two.

What about paid platforms? Cyfrin offers paid certifications and CodeHawks contest fees. Academy is free across all four pillars. Some paid platforms exist (Secureum, etc.) but most learners get most of what they need from free platforms.

Is there overlap in the founders / instructors? Patrick Collins (Cyfrin) and Carlos Vendrell (Zealynx) are both well-known in the Web3 security education space. Neither has formally endorsed the other's platform; both are independently regarded.

How do I choose if I'm just starting out? Try the free intro of each (Cyfrin's Solidity-101 video; Academy's first Uniswap V2 module section). Pick whichever held your attention longer. You'll naturally drift toward the format that fits your cognitive style.

Does using one preclude using the other? No. They share enough fundamentals that switching is friction-light. Most serious learners end up using both at different stages.

Will Academy's Uniswap V2 reconstruction prepare me for CodeHawks? Indirectly. CodeHawks is a contest format where you find bugs in unfamiliar code under time pressure. Reconstruction trains the inverse: writing correct code that passes a known test suite. Both build pattern recognition for "what does correct code look like", but the contest format requires additional skills (time management, prioritization). The Shadow Arena pillar is a closer match to CodeHawks-style audit practice than the Build pillar is.

Is Zealynx affiliated with Cyfrin? No. Zealynx Security and Cyfrin are independent audit firms. Both have built education arms; both compete for the same audit clients in some markets; both publish openly about their methodologies.

Where to see this in Academy

Pick a pillar that interests you and try it free. The Uniswap V2 module is the most common entry point; the Shadow Arena's beginner targets (ElasticSwap, Flux Finance) are also accessible. The AI Auditor Builder pillar is for learners with more Solidity background.

If you've already used Cyfrin Updraft and want a contrast, start with the Build pillar. The reconstruction format is sharply different from Cyfrin's video format and gives a quick read on whether the test-driven style fits your learning preferences.