Vendor
Zealynx
Polish security firm offering smart contract audits, dApp pentesting and AI security reviews
About
Zealynx Security is a Web3, Web2 and AI security firm headquartered in Wroclaw, Poland, led by its founder, who is also its senior auditor. It audits smart contracts across EVM chains, Solana, Rust, Cairo and Sway, combining line-by-line manual review with Slither, hand-written Foundry invariants, mutation testing, Halmos and its own tool Krait. Beyond contract audits, it offers application security audits (white-box and black-box pentesting of dApps, wallets, APIs and backends against OWASP and Web3 business logic), full-stack engagements that run on-chain and off-chain reviews in parallel, a security audit subscription for protocols still in development, and AI and Model Context Protocol server reviews. Zealynx also builds Solidity and Solana (Anchor) smart contracts with invariant tests and an audit handoff package. Its process starts with a fixed-price scope and a named lead auditor, and includes a fix review at no extra cost. Audit reports are public by default and listed on its website, and its methodology is published. It maintains the open-source AI auditing tool Krait and runs Zealynx Academy, a free security education programme.
At a glance
- Headquartered in Wroclaw, Poland
- Audits EVM, Solana, Rust, Cairo and Sway code with Foundry invariants, mutation testing and Slither
- Pentests dApps, wallets, APIs and backends, and reviews AI agents and MCP servers
- Audit reports public by default, with a published methodology
- Maintains the open-source AI auditing tool Krait
- Services
- Audit
- Penetration testing
- Development
- Languages
- Solidity, Rust, Cairo
- Headquarters
- Poland
- Public audit reports
- zealynx.io(opens in a new tab)
Zealynx: frequently asked questions
- What services does Zealynx offer?
- According to its public information, Zealynx offers: Audit, Penetration testing, and Development.
- Which blockchains does Zealynx work with?
- Zealynx works with Ethereum, Arbitrum, Polygon, BNB Chain, Base, Optimism, Avalanche, Solana, and NEAR.
- Which smart contract languages does Zealynx use?
- Zealynx works with Solidity, Rust, and Cairo.
- Where is Zealynx based?
- Zealynx is headquartered in Poland.
- Is Zealynx verified on smart-contract.com?
- Not yet. This listing was compiled from public information and Zealynx has not claimed it or gone through the vetting process of smart-contract.com.
- How can I get a quote from Zealynx?
- Describe your project once on smart-contract.com: you receive comparable quotes from vendors that match it, in the same format. Development and audit are always entrusted to two independent companies.
Where this information comes from
This listing was compiled from the public pages below and last reviewed on September 24, 2026. The company has not claimed it yet, is not a partner of smart-contract.com and has not been vetted.
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