100% covered100%
Core Grant
up to $24,000
Free full audit for selected builders. Aimed at solo founders and small teams.
Zealynx Security
Smart contracts. dApps. AI agents.
One security partner for the whole stack.
Manual review, dApp pentesting, and AI red-teaming. Senior auditors on every audit. Across EVM, Solana, Rust, Cairo, and Sway.
Fixed-price scope, same-day reply, no sales call required.
Track record
Audits
51
audits completed
TVL secured
$5B+
peak protocol value audited
Findings
572
vulnerabilities identified
Chains
5
EVM · Solana · Rust · Cairo · Sway
Protocols we have audited
Also Trusted by Security Firms
Carlos (Bloqarl), founder of Zealynx, has acted as an auditor contractor for Pashov Audit Group, Cyfrin, and Sherlock.
Differentiation
Why teams choose Zealynx.
01
Same auditor. Without the agency markup.
Hire any of the bigger names and the lead auditor on your engagement may well be Carlos anyway. He has contracted on audits for Cyfrin, Immunefi, Pashov Audit Group, and Sherlock. Hire Zealynx and you get him directly, working alongside the same senior team, with no agency layer between you and the person reading your code.
02
The full stack, audited in parallel.
Smart contracts, dApps, and AI systems reviewed at the same time, not in sequence. Auditing every layer simultaneously is faster to deliver, and every layer informs the others. The more context we have on how the system fits together, the deeper the findings get.
03
Recognized work. Public reports.
ETHSecurity Badge of Trust from TheDAO. Wrote 8 guides in the official Uniswap v4 docs. Founder of Zealynx Academy, a public security learning platform. Plus 51 public audit reports, read them before you sign.
What we audit
What needs reviewing?
Smart contracts
Solidity/EVM, Solana/Anchor, Rust/NEAR, Cairo/Starknet
AI red teaming
LLM apps and agents
MCP security
Servers, clients and tool permissions
Application security
dApps, APIs, backends and TypeScript
Need on-chain and off-chain review together? Explore a full-stack audit. Compare all services.
How would you like to start?
For smart contract and protocol teams
Start small. See how we work.
Krait
Free Solidity checks with your IDE's AI.
FreeZealynx Insiders
Protocol-builder feedback from Carlos.
$50 / monthFounder Security Sprint
A focused three-day audit of your agreed highest-risk contracts.
$1,500 onceSprint includes an audit report, one fix re-check round and 12 months of Insiders. Its $1,500 is credited toward a full Zealynx audit booked within 12 months.
Still building every week?Ongoing contract and protocol code review · from $1,500/month, 3-month minimumReady for the full scope?Go straight to a full audit · scoped quote
No required steps. Tools, advice and focused reviews do not replace a full audit. Offer details checked 30 October 2026.
For AI, MCP or application security, discuss a scoped review.
How an audit worksFrom scope to fix review,
From scope to fix review,
every layer is published.
STEP 01Fixed price
Scope.
Share your repo and architecture notes. We return a fixed-price scope, timeline, and named lead auditor.
STEP 026 layers
Review.
Line-by-line manual review, plus Slither, Krait, hand-written Foundry invariants, and mutation testing on your test suite. Each layer is calibrated against a seeded bug before its result counts.
STEP 03Public
Report.
Every finding ships with severity, impact, reproduction steps, and a concrete fix. Severity is set by the published Impact × Likelihood matrix.
STEP 04Included
Fix review.
We re-review your patches at no extra cost and update the report to reflect the resolved state.
Testimonials
What our clients say.
The Zealynx audit was extremely high value. Carlos identified a serious Critical issue almost immediately, which was very impressive, and found several other substantive problems that materially improved the security of the protocol. The review directly influenced the final architecture, and the protocol would not have been suitable for deployment without it. Thank you so much, Zealynx!
Contract Level
Krait · open source AI auditor
Krait. Open source AI auditor.
Generates tailored security prompts for every check, backed by real Solodit exploits. Latest benchmark: 0 false positives and 15% recall on 5 blind Code4rena contests. Works with Claude Code, Cursor, Windsurf, and Codex.
▍
GRANTS · BY ZEALYNX
$100k+ in funded audits
for Web3 builders.
Applications for Season 2 are closed. See the program and its updates, or request a paid audit scope if you need a review sooner.
Half covered50%
Growth Grant
$12,000
Half-price audit for protocols with traction but limited security budget.
Discounted25%
Builder Grant
$6,000
Discounted audit for early-stage builders who do not yet qualify for Core.
Zealynx Academy · free
Zealynx Academy. Free.
Build real DeFi protocols line by line. Audit real forks from past contests. Learn what it takes to launch your own.
When your fork or module is ready for a real security pass, run Krait before you ask for the full audit. It is the cleanest bridge from learning mode into launch readiness.
› Tap a milestone to read the detail
PROTOCOL TEAM PATH
Practicing on Shadow Arena before launch?
If the exercise maps to a protocol you are shipping, move from practice to a real readiness pass. Request a Zealynx audit quote, run Krait first, or ping Carlos on Telegram as the secondary path.
Security research
Browse all research Security research.
Public write-ups on the bugs and patterns we find in production audits.
Agent Payment Security: 20 Checks Before You Ship
20 checks for AI agent payment flows: who sets the payout, what each payment is bound to, which signatures the key can make, and how Binance 14 was drained.
Read the write-up
FAQ
Frequently asked questions.
A typical Zealynx smart contract audit runs 2 to 6 weeks from kickoff to delivery. Scope, codebase size measured in nSLOC, complexity, and number of integrations drive the timeline. We share the lead auditor's calendar and a fixed delivery date before you sign the engagement.
Zealynx audits smart contracts on EVM (Solidity), Solana (Rust and Anchor), Starknet (Cairo), and Fuel (Sway). Beyond smart contracts, we audit Web2 backends, dApp frontends, TypeScript codebases, APIs, wallet integrations, AI systems, and Model Context Protocol (MCP) servers, all with the same senior review depth.
Yes. Fix review is included in every Zealynx engagement at no additional cost. We re-review your patches, verify each finding is resolved, and update the audit report to reflect the resolved state before publication.
A senior auditor leads and signs off on every file. There are no junior handoffs, no ticket queues, and no agency layer between you and the person finding the bugs. Founder Carlos Vendrell (Bloqarl), who has audited as a contractor for Cyfrin, Immunefi, Pashov Audit Group, and Sherlock, leads or co-leads every engagement.
Krait is Zealynx's open source AI auditor, one of six independent verification layers in our methodology. It runs alongside manual review, Slither static analysis, custom Foundry invariants, and mutation testing. Krait is calibrated against deliberately seeded bugs before its results are trusted, and findings always go through human verification before they reach the audit report.
Every Zealynx audit ships with a public report (private on request) containing each finding's severity, impact, reproduction steps, and a concrete fix. Severity is set by the published Impact × Likelihood matrix. You also get the full Krait scan output, the Foundry invariant test suite, the mutation testing report, and a free fix review after remediation.
Send your repository and a one-paragraph brief through zealynx.io/quote. Carlos replies personally the same day with a fixed-price scope, timeline, and named lead auditor. There is no sales call gate and no agency intermediary. Applications for Audit Grants Season 2 are closed. See program details and updates at grants.zealynx.io.
Get a quote
Send your code. I'll reply personally.
Carlos here. Drop a repo or a one-paragraph brief and I'll get back to you the same day with a scope, timeline, and quote. No sales call gate, no agency layer. Just the auditor who'll be reading your code.