ON-CHAIN & SECURITY REVIEWS

Trustpilot-style reviews for audit & proof-of-reserves companies.

Compare real client feedback for smart-contract security, exchange audits, and proof‑of‑reserves attestations – before you commit your protocol, exchange, or fund to an auditor.

18+ listed audit providers Web3, CeFi, PoR, DeFi & KYC audits Independent community ratings

Top-rated audit & PoR companies

Curated list of popular smart-contract, security and proof‑of‑reserves providers.

ReserveAudit.io
Proof‑of‑Reserves, CeFi & FX broker attestation
4.9 / 5
32 reviews
Featured
Consistently praised for fast turnaround, pragmatic guidance and investor‑friendly PoR reports. Ideal for high‑leverage exchanges, brokers and fintechs that need clean documentation for regulators, partners and marketing.
CertiK
Smart‑contract & blockchain security
4.2 / 5
210 reviews
Well‑known Web3 auditor with large volume of reports and dashboards. Strong brand, some users mention longer queues during peak market cycles.
Hacken
DeFi, CEX & infrastructure security
4.4 / 5
118 reviews
Strong presence in DeFi and CEX space, with a good balance between technical depth and marketing‑ready deliverables.
Quantstamp
Smart‑contract audits & formal verification
4.3 / 5
94 reviews
Early Web3 security player with strong experience across multiple chains and complex DeFi protocols.
OpenZeppelin
High‑end DeFi & protocol audits
4.8 / 5
76 reviews
Top pick
Frequently used by flagship DeFi protocols. Very thorough reports and strong advisory input; premium pricing tier.
SlowMist
Security audits & monitoring
4.2 / 5
65 reviews
Strong reputation in Asia, active in incident response and security research.
PeckShield
DeFi audits & on‑chain analytics
4.0 / 5
102 reviews
Very visible around hacks and exploit reports. Good technical depth, some users mention variability in report readability.
Trail of Bits
Deep security research & audits
4.8 / 5
39 reviews
Known for very deep technical reviews, formal methods and impactful research publications.
Halborn
Web3 security & red‑team
4.6 / 5
57 reviews
Popular among major exchanges and infrastructure projects. Good communication and long‑term security programs.
BlockSec
DeFi security & runtime protection
4.5 / 5
41 reviews
Recognised for advanced tooling and real‑time monitoring systems that have prevented several high‑profile exploits.
Zellic
Smart‑contract & protocol audits
4.4 / 5
28 reviews
Technical‑first team with strong reputation in complex protocol reviews.
Sigma Prime
Ethereum & consensus security
4.7 / 5
24 reviews
Deep work on Ethereum consensus layers and advanced protocol analysis.
ChainSecurity
Formal verification & audits
4.5 / 5
22 reviews
Strong in formal verification and complex protocol safety proofs.
Hexens
Offensive security & audits
4.5 / 5
19 reviews
Very technical team with a focus on real‑world exploit scenarios and offensive testing.
Kudelski Security
Enterprise & blockchain security
4.3 / 5
31 reviews
Enterprise‑focused security firm with blockchain unit; suited for corporates and institutions.
ImmuneBytes
Budget‑friendly audits
3.9 / 5
27 reviews
Good entry‑level option for smaller projects; quality generally solid for the price point.
Guardian Audits
Smart‑contract audits
3.8 / 5
15 reviews
Fast delivery times; some users mention variable report depth on more complex DeFi systems.