Smart contracts
EVM and Solana protocols, vaults, governance.
Introducing Tessilon AI, directed by expert judgmentThe world’s leading
The world’s leading
defensive security research firm
Sujith picks the targets and sets the scope. Tessilon AI hunts them down across smart contracts, blockchains, hardware and chipsets.
Scope: anything that holds value
From smart contracts to silicon, with bounties earned across blockchains, hardware and chipsets.
Blockchains
Clients, consensus, L2 rollups and bridges.
Hardware
Devices, firmware and their trust boundaries.
Chipsets
Silicon-level interfaces and secure elements.
AI systems
Agent harnesses and context engineering.
Expert direction. Machine-scale hunting.
Every Tessilon engagement runs the same way.
Sujith sets the direction
Picks the targets and defines the scope: threat model, hypotheses and exactly where to hunt.
Tessilon AI hunts
Every function, state transition, protocol path and hardware interface along those lines, exhaustively.
Findings, proven
Issues ranked by exploitability, each with a reproduction and a concrete fix.
$0B+Total value secured
0+Audits completed
0Exploits post-audit
0%Client retention
Purely defensive. By design.
We find and fix weaknesses before anyone else can use them, and stand beside you when something goes wrong.
Defensive Security Research
Deep review of smart contracts, blockchains, hardware and chipsets. Tessilon AI hunts along expert direction; every issue comes with a reproduction and a fix.
Threat Modelling
Map assets, actors and trust boundaries before code ships, so design flaws are caught while they are still cheap to fix.
On call
Incident Response
Real-time detection and response for live systems. When something moves, we are already in the room.
The direction behind Tessilon AI
Sujith Somraaj
Co-Founder & CEO. Tessilon is his professional practice, an independent, adversarial perspective that reviews systems holistically, not code in isolation.
Lead Security ResearcherSpearbit
Independent Security ConsultantLI.FI
Information Security AdvisorSuperform
Bounties awarded
Phantom
Ripple
Uniswap
Morpho
Review history includes
Coinbase
Lido
Uniswap
Base
Optimism
Solana Foundation
LayerZero
Euler
Ondo
zkSync
Berachain
Centrifuge
LI.FI
+25 more
We don’t work with every project.
We work with the ones that matter.
A small number of engagements at a time, so every system gets senior attention from scoping to sign-off.
Shipping something that matters?
Engagements are scoped directly with Sujith.