Who reviews your code

About Vari

A security review is only as good as the people behind it. Vari is founded and led by Varinder Singh, and the published reviews on this site are the credential.

Varinder Singh, founder and lead reviewer at VariVarinder SinghFounder & lead reviewer
Chain architectureStablecoinsDeFi smart contractsCross-chain

Seven-plus years in crypto, building novel products from scratch — blockchains, DeFi protocols and stablecoins, architected end-to-end. Across the contracts we've built, reviewed and managed, more than $1B has moved on-chain. Vari brings that same attacker's-eye view to your whole stack — reviewed by people who've shipped the systems that have to survive the attack.

That background is the reason the scope is what it is. Building a chain or a stablecoin end-to-end means you do not get to stop at the contracts: you write the deploy scripts, set the multisig thresholds, wire the bridge, ship the frontend that asks people to sign, and then carry the pager when one of those is wrong at 3am. The layers most audits leave out are the ones we spent years being responsible for.

It also sets the standard for what counts as a finding. Having been on the receiving end of reports padded with lint, every item here has to answer one question first — can this actually be used against you? — and arrive with a fix that a developer can apply the same day.

BuiltL1 chain architecture, DeFi protocols, multi-collateral stablecoins — from whitepaper to mainnet
ReviewedEVM (Solidity), Solana (Anchor/Rust), Stacks (Clarity), plus the config, cross-chain and app layers around them
PublishedSix client-anonymised reviews on this site — the full reports, not summaries
7+ yrsin crypto — chains, DeFi, stablecoins
$1B+transacted through contracts we've built, reviewed or managed
6layers reviewed in every Full engagement
6published reviews · 244 findings · 219 with an executed proof of concept
How we test

The method is easier to judge from the work than from a description of it.

Every published review shows the same thing this page could only assert: the protocol stood up locally, the attack attempted, the result quoted, and the attacks that failed listed beside the ones that landed.

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