Hashlock

I am the COO of 4irelabs

4irelabs is a software engineering company that builds fintech and blockchain products, including digital banking platforms, DeFi protocols, and RWA tokenization systems.

Referral

2-5 Employees

We build blockchain products for clients in fintech and finance, and an independent security review is a fixed step in how we deliver. On this engagement, Hashlock audited the smart contracts behind a product our team developed. Their auditors went through the codebase covering access control, business logic, and overall code quality, then mapped each finding to a severity level with a recommended fix. Our engineers worked through the remediations, and Hashlock verified every one of them before signing off. The final audit report became part of the launch package we handed over to the client.

Every finding raised in the audit was fixed and verified before launch, and the product went live on schedule. The report gave our client the independent assurance they needed, which counts for a lot when the end users sit in finance and regulated markets.

Smooth from start to finish. We agreed on dates at kickoff and they met all of them, and whenever our engineers had a question about a finding, the answer came back quickly and in plain engineering terms. Communication ran over calls and a shared channel, which kept everything moving.

Virtual Meeting

The depth and the clarity of their work stood out. The audit went well past surface level checks into the business logic of the contracts, and the report was structured so well that we could hand it to our client and their stakeholders without reworking a thing. We ship for companies in finance and regulated markets, and a security partner whose work holds up at that level is a real asset.

Honestly, nothing worth flagging. If we had to name one thing, next time we would simply bring them in even earlier in the build.

I am the CEO of Clevit

Clevit is an external product engineering team that helps funded startups ship production-ready software across SaaS, AI, and Web3.

Referral

2-5 Employees

Hashlock acted as our security partner on the Web3 products we build for clients. We develop smart contracts, DeFi components, and dApps, and we brought Hashlock in to audit that code before it reached production. The scope included a full review of the contract codebase for security vulnerabilities, logic issues, code quality, and adherence to best practices.Hashlock delivered a detailed audit report with clear findings, severity levels, and remediation guidance written in a way our engineers could act on directly. After we addressed the issues, Hashlock reviewed the fixes and confirmed they were resolved, which let us hand off a secure, audited product with confidence.

Hashlock identified vulnerabilities and code quality issues in the contracts we audited, which our team fixed before deployment. The fixes were checked too and a final report issued. The audited products launched on schedule with an independent security review behind them, and our clients gained real confidence from knowing the code had been checked by a dedicated and well-known Web3 security team.

Hashlock was genuinely easy to work with. They were fast, responsive, and right on spot. They delivered the audit reports on time, kept us in the loop throughout, and fit cleanly into our sprint timelines, which matters a lot when we are shipping on our desired schedule.

What stood out most was how well Hashlock worked alongside our engineering team. They explained security findings in practical, code-level terms in their report so our developers could act on them immediately, and they moved fast, checking our fixes. It felt less like outsourcing an audit and more like adding a security team to our own.

Nothing significant comes to mind. The collaboration was smooth, the work was solid, and the process fit the way we build. Any refinements would be minor and did not affect the quality or the outcome.

I am the Developer Relation of Primus Labs

We build cryptographic infrastructure for users and builders to verify and further compute Internet data with zkTLS and zkFHE.

Referral

2-5 Employees

This work is about a CEX trading hook for DeFi swapping pools, enabling users to validate their 30-day spot trading volume across centralized exchanges (CEXs) to become eligible for a swap fee discount.

Overall, we’re very satisfied with Hashlock’s work on the project.The audit was conducted thoroughly and delivered on schedule. The team maintained clear communication throughout the process, quickly addressing our questions and providing actionable insights.The measurable outcomes include the identification of one critical and low-level issues, all of which were promptly resolved based on the common understandings. Their work definitely contributed to improving the overall security and robustness of our system.

They delivered the audit result and the report on time.

What impressed us most about Hashlock was their efficiency.They were highly responsive, completed the audit ahead of schedule, and provided clear, actionable feedback throughout the process. Their ability to move quickly without compromising quality made a big difference for us.

Generally, their communication and deliverables were excellent.

I am the Founder of a fintech blockchain company.

We are a fintech blochain advisory firm.

Used before

Used in the past

2-5 Employees

Smart contract audit - NDA

Hashlock to conduct a security audit of their smart contracts. Hashlock manually and proactively reviewed the code in order to ensure the project’s team and community that the deployed contracts are secure.

Yes delivered all on time. Even ahead of schedule.

I was impressed with their ease of communication and speed of delivery.

Please have better time zones - australian timezon meetings was semi difficult

I am the Co-Founder of Futurity Galaxies

A sci-fi trading card game ecosystem that combines physical and digital collectibles with true ownership, an online gameplay, and a unique reward system when holders receive revenue when their cards are pulled from a pack online.

Online Search

The company performed a security audit and application review for our online trading card game ecosystem, including payment systems, wallet connectivity, and reward distribution functionality. They identified vulnerabilities, provided remediation guidance, and verified fixes to help prepare the platform for public deployment

The audit identified vulnerabilities and areas for improvement within our platform, and the remediation process helped strengthen the security and stability of the application before launch. The final deliverables provided our team with clearer security standards, verified fixes, and greater confidence moving toward public deployment.

They were always prompt with their responses and had a very quick turn around time. I was very impressed with the effort they put forth, and I felt valued as a client.

Quick responses and great communication. Once we inquired about an audit, we were able to meet with Fletcher via a Google meet call the same day. We felt very confident during and after the meeting. The onboarding was great and the team was easy to work with.

Honestly I can't think of anything. It was a great experience