Organization Name – Kerberus
Category – 
Security & Identity
Kerberus Cyber Security, Inc. describes itself as a start‑up on a mission to make scam‑free browsing the default setting for anyone who connects a crypto wallet to the internet. Incorporated… in Delaware in 2022 and now run from a distributed team headquartered in Phuket and Tel Aviv, the company is best known for Sentinel3, a browser extension that, they claim, blocks malicious Web3 sites in real time with a 99.9 percent detection rate and “zero user losses since January 2023.” The Chrome Web Store lists more than 100 000 active users, a 4.8‑star rating across almost 300 reviews, and language that promises “bullet‑proof protection for your crypto and NFTs.”
Kerberus was co‑founded by former Salesforce offensive‑security lead Danor Cohen and growth‑hacking veteran Alex Katz, who now serves as chief executive. Company documentation portrays Cohen as the architect of the detection engine—he spent years on bug‑bounty leaderboards for PayPal and Dropbox—while Katz, a marketing specialist who entered crypto in 2014, leads go‑to‑market strategy.
Kerberus Sentinel3
Both founders insist that conventional blacklists cannot keep pace with wallet‑draining schemes that mutate every few minutes, so Sentinel3 analyses each website on‑the‑fly: a lightweight scan at the first wallet connection, followed by a deeper inspection before any transaction or signature request reaches the user.
If a site fails either check, the plug‑in throws a red warning and blocks the page; if it passes, the window turns green. Behind the scenes, Kerberus says it trains machine‑learning models on thousands of scam payloads and refreshes signatures every thirty seconds, a cadence the team claims is fast enough to stop “drainers” that cloak themselves behind freshly registered domains.
Feature development has moved quickly. Early versions covered the main EVM chains; by February 2025 the extension added beta protection for Solana via the Phantom wallet, making Sentinel3 one of the first retail tools to tackle
The product also bundles a coverage guarantee underwritten by Fairside Insurance: users of the paid “Pro” tier can claim up to 30 000 USDC (and, they say, soon up to 100 ETH) if they lose funds after Sentinel3 displays no warning pop‑up. “This partnership lets us raise effective protection from 99.9 to 100 percent,” Katz told Decrypt when the
The fine print enumerates scenarios that void a claim—disabled extension, unsupported chain, ignored alerts—but the very existence of an indemnity scheme is rare in a market where most security plug‑ins are “best effort” only. Competitor ScamSniffer, for example, protects more than 150 000 users yet imposes a 0.25 percent fee on certain swaps and offers no loss reimbursement at all.
Independent validation arrived on 21 February 2025 when VaaSBlock awarded Kerberus its RMA™ badge after a review of governance, revenue transparency, technology controls, and team proficiency. VaaSBlock’s write‑up highlighted Sentinel3’s open documentation, public uptime logs, and “standard exceeded” score for results delivered.
Katz called the certification “critical for winning the confidence of institutional counterparties,” suggesting the company is courting wallet vendors and exchanges that require external audits before bundling third‑party code. Indeed, Kerberus pitches Sentinel3 as a white‑label component that custodians can embed directly into signing flows; the team says talks are under way with at least two centralized exchanges that want to offer built‑in scam filtering for retail customers.
The extension’s core appeal is speed and simplicity. Installation requires one click from the Chrome, Brave, or Edge store, after which Sentinel3 operates autonomously. Documentation claims the software scans every EVM chain “out of the box,” meaning new Layer 2 networks are protected from day zero, while Solana support remains in public beta.
Users see colour‑coded pop‑ups that summarise risk in plain English; advanced settings allow professional traders to customise heuristics and disable blocking for specific domains. Developers can tap the Sentinel3 API—documented in the company’s GitHub repository—to pull verdicts into their own dashboards, and a Rust library is under construction for latency‑sensitive apps.
Kerberus’s business model marries a freemium approach with insurance‑backed upsells. The free tier covers unlimited browsing and signature checks but lacks the Fairside indemnity and certain on‑chain simulation features. Pro subscribers pay a modest monthly fee (the exact amount varies by region) for the coverage guarantee, higher‑frequency rule updates, and priority support. Katz argues the structure keeps the barrier to entry low while aligning the firm’s incentives with user safety: “If we ever miss a scam and you lose funds, we pay.”
Critics note that claim approval depends on server‑side logs the company alone controls, although Kerberus states logs are hashed to prevent tampering and can be produced for arbitration.
Growth so far appears healthy for a two‑year‑old security tool. LinkedIn lists a core team of fewer than ten employees, yet the Chrome store reports six‑figure installations, and Sentinel3 consistently ranks in “best crypto browser extension” round‑ups published by AltWow and Milk Road.
A Startup Nation Finder profile also lists Kerberus among Israel’s rising cyber‑security ventures, citing zero user losses as a distinguishing metric.
Startup Nation Finder
Analysts attribute part of the traction to the wave of wallet drainers that stole almost half‑a‑billion dollars in 2024, events that pushed many retail users to look for preventative tools rather than post‑hack on‑chain detectives. Kerberus’s marketing leans into that narrative, warning that “75 percent of Web3 users have their assets stolen at least once” and positioning Sentinel3 as an essential seatbelt.
The company’s road map extends beyond a single extension. Public documentation outlines plans for Sentinel3 Mobile, a Safari‑compatible iOS build that would scan decentralised‑app links opened via mobile wallets, and Sentinel Cloud, an enterprise API that exchanges and payment gateways could hit for real‑time domain reputation.
Katz told CoinDesk’s Consensus Hong Kong livestream that Kerberus wants to become “the crowd‑sourced Cloudflare of Web3,” eventually serving risk scores via DNS and smart‑contract oracles.
To fuel those ambitions the founders raised an undisclosed seed round in late 2024 led by private angels from the Israel cyber‑defence community; no venture capital names have been disclosed. A future Series A is planned once Sentinel Cloud gains paying pilots.
Challenges remain. Browser extensions are at the mercy of browser policies—Google could impose new rules on content scripts, or Apple could restrict sideloading on iOS despite EU pressure. Sentinel3 also competes in a noisy space where ScamSniffer, Pocket Universe, and WalletGuard vie for user attention; the top rival already claims a larger user count, though Kerberus counters that its zero‑loss statistic and indemnity plan give it a differentiated edge.
And while the RMA badge impresses early adopters, institutions might demand heavier certifications like SOC 2 or ISO‑27001 before bundling Sentinel3 into custodial stacks. The founders concede these audits are on the horizon but warn they require six‑figure budgets—a steep bill for a lean start‑up.
Even so, Kerberus’s progress illustrates a broader shift in Web3 security from reactive post‑mortems to proactive user‑side defence. By combining machine‑learning heuristics, constant rule updates, and an insurance overlay, the company has forged a product that resonates with both novice crypto holders and professional traders hunting for basis spreads. If Kerberus can maintain its perfect safety record while scaling beyond the browser—into wallets, exchanges, and perhaps chain‑level oracles—it could emerge as one of the few security start‑ups to translate community goodwill into sustainable revenue. For now, Sentinel3 remains a compelling line of defence in a market where a single mis‑click can evaporate life savings, and every extra millisecond of scam‑site detection counts. Read More
Security & Identity
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