Papers is a Swiss software engineering and consulting company. Some of their services include smart contract development and audits focused on security and usability, as well as mobile security and mobile, web and DApp development.

The PepperSec team is founded by white hat hackers. They are seasoned professionals with many years of experience and they have a deep understanding of the modern Internet technologies. They provide clients with comprehensive security analysis of web and mobile apps, as well as blockchain based applications and smart contracts. They are ready to battle for the security of your project.

Pickle Solutions team performs code review, as well as static and dynamic analysis of smart contracts, in order to find any unexpected behaviors.

Quantstamp is a smart contract security company that is developing the Quantstamp protocol and automated security tools, and conducts manual audits. The Quantstamp protocol aims to enhance smart contract security and the reputation of projects that create smart contracts by producing openly accessible scan reports.

QuillHash Technologies is a blockchain development company and QuillAudits is their secure smart-contract/dApp/protocol auditing platform committed to making the Blockchain ecosystem more secure.

Compliance with business logic, M&A analysis, Security review, Trustless trust review, Ownership and gas optimization

Security Innovation specializes in both security assessment and training. They are also the creators of the Security Innovation Blockchain Capture the Flag challenge.

Sigma Prime is an information security consultancy, specialised in Blockchain technology, with a strong focus on Ethereum. Sigma Prime team is composed of developers, researchers and security engineers who have come together with the purpose of building a secure and decentralised world. They have performed many smart contract security reviews for prominent Blockchain projects.

SlowMist focuses on security of the Blockchain ecosystem. They are headquartered in Xiamen and founded by the team with over ten years of front-line cybersecurity defensive experience, specializes in ecology security of blockchain industry.

Smartaudit24 is a company that provides smart contract security audits, smart contract development, as well as maintenance & support services.