The Best Quantstamp Alternatives in 2026

CertiK combines formal verification, security audits, and monitoring tools to assess smart contracts and blockchain protocols.

Sherlock offers Web3 security audits, contests, AI analysis, and bug bounties for smart contract projects.

BlockSec combines crypto compliance and security tools for screening illicit fund flows, auditing contracts, and monitoring DeFi protocols.

Hacken provides blockchain security and compliance services, including audits, penetration testing, threat monitoring, and proof-of-reserves work.

Blockaid provides real-time Web3 security tools for preventing scams, fraud, exploits, and compliance risks across on-chain finance.

Web3 Antivirus offers browser and wallet security tools, a security API, wallet risk analysis, and monitoring for phishing and poisoning attacks.

Nexus Mutual offers crypto cover for risks including hacks and describes itself as an alternative to insurance.

Elliptic provides crypto compliance software to screen, monitor, and investigate on-chain financial risk for banks, exchanges, and governments.

Hypernative monitors digital assets for threats and supports real-time detection, response, and fraud prevention.

OtterSec audits blockchain systems, including layer-one networks, wallets, DeFi protocols, bridges, and related infrastructure.

Sigma Prime audits smart contracts, zero-knowledge systems, blockchain infrastructure, and off-chain code, and publishes security research.

Three Sigma audits blockchain code and DeFi systems, reporting security findings and services for Web3 projects.

Hexens audits blockchain systems and offers continuous threat exposure monitoring, alongside research on smart contract platform vulnerabilities.

Hats Finance runs a decentralized marketplace for smart contract bug bounties and audit competitions.

Immunefi connects crypto projects with security researchers through smart contract and crypto bug bounty programs.

HAPI uses cross-chain smart contracts to add security functions to decentralized finance products.

Cyfrin provides blockchain security audits, developer courses, and security research for protocols, institutions, and engineers.

FailSafe builds continuous security testing systems that probe applications, APIs, infrastructure, and AI systems for exploitable issues.

RockawayX invests in Web3 ventures and provides blockchain infrastructure, liquidity, and engineering support for protocols and founders.

Each Ethernaut level requires hacking a smart contract in the Ethereum Virtual Machine through a Web3 and Solidity wargame.

Ensuro offers digital insurance for embedded protection; its site reports policies sold and premiums collected.

InstaDapp develops DeFi tools, including the Fluid protocol and Avocado wallet for account and smart contract transactions.

Tulipa Capital curates DeFi risk strategies and provides dashboards and partner information for its on-chain finance work.

Revoke.cash helps inspect and remove token approvals and wallet permissions across Ethereum and more than 100 networks.