Manual code review
Engineers read every line, the way an attacker would.
- Business-logic & access-control review
- Reentrancy, overflow, and external-call risks
- Upgrade, pause, and admin-key analysis
Web3 · audit-first practice
Smart contract audits, run before mainnet. Not after.
Shazra Labs is a smart contract audit company that reviews your contracts the way attackers do: static analysis, fuzzing and invariants, then line-by-line manual review, all before a single dollar of TVL is at risk. You get a severity-ranked report, a concrete fix for every finding, and a re-audit once you've patched.
What it is
What a smart contract audit actually is
A smart contract audit is a security review of your on-chain code before it goes live. The goal is simple: find the bugs that drain funds, brick the protocol, or hand an attacker control, and fix them while it's still cheap. A real audit is more than running a scanner. It pairs automated tooling with engineers reading every line, then hands you a report that ranks each issue by severity with a concrete remediation.
Our smart contract audit services
Six layers, one review.
Every audit runs the full stack below. We don't sell a scanner report and call it an audit.
Static analysis
Slither and custom detectors across the whole tree.
- Slither on every contract
- Known-vulnerability pattern matching
- Dependency & library risk surface
Fuzzing & invariants
Echidna and Foundry hammer the edge cases.
- Property-based fuzzing (Echidna)
- Invariant tests in Foundry
- Failure cases your unit tests miss
Economic review
Tokenomics and incentive attacks, not just code.
- Oracle manipulation & price-feed risk
- MEV, sandwiching, and flash-loan paths
- Vesting, emissions, and fee-split logic
Gas optimization
Cheaper to use, without weakening safety.
- Storage & calldata layout review
- Hot-path gas profiling
- Safe, documented optimizations only
Re-audit on fixes
We verify your patches before you ship.
- Each remediation re-checked
- No new issues introduced
- Included, not billed again
What we audit
Tokens, DeFi, NFTs, RWA, bridges, DAOs
If it holds value or controls it, we'll review it.
ERC-20 / SPL tokensVesting & airdropsDEX / AMMLending & stakingPerpsNFT 721 / 1155 · MetaplexRWA & tokenizationBridges & oraclesDAO governanceEthereumBasePolygonArbitrumOptimismAvalancheSolanaSolidityVyperRust · AnchorMoveCairo
The process
How an audit runs.
Scoped up front, fixed quote, clear timeline. No open-ended meters.
Scope & quote
Automated pass
Manual review
Fuzz & invariants
Report
Re-audit fixes
What you get
A report you can act on
Severity-ranked findings
Every issue classified Critical to Informational, with impact and likelihood.
A fix for each one
Not just "this is unsafe". The exact change, with code.
Re-audit sign-off
We confirm your patches land cleanly before mainnet.
Smart contract audit FAQ
People also ask
What is a smart contract audit?
A security review of your on-chain code before it goes live. It combines automated tooling (static analysis with Slither, fuzzing and invariant testing with Echidna and Foundry) with line-by-line manual review by engineers, then delivers a report that ranks each finding by severity with a concrete fix.
How much does a smart contract audit cost?
It depends on contract size, complexity, language, and external integrations. A single ERC-20 with vesting is far cheaper than a multi-contract lending protocol with oracles. We give a fixed quote up front. For a full breakdown, see Smart Contract Audit Cost in 2026.
How long does an audit take?
Most audits run one to three weeks depending on scope. We scope the engagement up front and give you a timeline with the quote, including a window for re-auditing your fixes.
Which audit firms do you coordinate with?
For high-value launches we coordinate an external audit matched to your budget and risk profile: from Trail of Bits, OpenZeppelin and Spearbit at the top end to boutique reviewers like Pashov, yAudit and Cyfrin Codehawks contests. We run Slither, Echidna and an internal manual review before anything reaches an external firm.
Do you re-audit after we fix the issues?
Yes, a re-audit of your fixes is included. We verify each remediation and confirm no new issues were introduced before you ship to mainnet.
Which chains and languages do you audit?
Solidity and Vyper across EVM chains (Ethereum, Base, Polygon, Arbitrum, Optimism, Avalanche), Rust and Anchor on Solana, plus Move and Cairo. We audit tokens, DeFi protocols, NFT contracts, RWA systems, bridges, oracles, and DAO governance.
Ready when you are
Ready to get audited?
Real reply within a day, from someone who'll be writing the code. No sales desk in between.
NDA-friendly · Fixed quotes · Reply within 24 hours
Tell us what you're building
Thank you, your brief is in.
We have emailed you a confirmation. A real engineer replies within one business day. Prefer chat? WhatsApp us.