Last May, when Solidus Labs rolled out what it called "agentic-based compliance," the company made a familiar entrepreneur's promise: Cut investigation times by a factor of twenty. Save your analysts five hours a day. The usual arithmetic of disruption.
What actually deserves attention isn't the math—it's the clientele. Over the course of roughly a year, the firm that built its reputation hunting down crypto pump-and-dump schemes started landing contracts with Webull, Kalshi, and a handful of other financial players who exist somewhere in the fuzzy territory between blockchain casinos and proper Wall Street. Three Goldman Sachs alums founded Solidus in 2017, with the goal of building what they like to call a "crypto-native" surveillance engine. These days, they're pitching it as the skeleton key for modern markets—full stop.
Three Ex-Goldmanites and a Hunch About Regulation
Asaf Meir, Chen Arad, and Praveen Kumar left Goldman with a straightforward bet: crypto was a cesspool of wash trades, spoofing, layering schemes, and sooner or later the authorities would start demanding the kind of scrutiny applied to equity markets. In February 2019, they raised a $3 million seed round, led by Hanaco Ventures.
By May 2021, demand had apparently quadrupled year-over-year, and the trio closed a $20 million Series A led by Evolution Equity Partners. The cap table told its own story—a cross-section of crypto money and compliance credentials. FTX wrote a check. So did Avon Ventures, the fund connected to Fidelity. The angel roster included Christopher Giancarlo, a former CFTC chair; Troy Paredes, ex-SEC commissioner; and Naval Ravikant of AngelList fame.
Five months on, in November 2021, Solidus tacked on a $15 million strategic round, this time led by Liberty City Ventures, pushing total capital near $40 million. Then in May 2022, the firm closed what would be its last publicly disclosed raise to date: a $45 million Series B, again led by Liberty City, with Evolution Equity, Declaration Partners, and others returning. All in, roughly $83 million through mid-2022.
Since then? Radio silence on the fundraising front. Which makes the recent flurry of enterprise partnerships—more on those shortly—worth noting. Growth, apparently, has come the old-fashioned way.
Beyond Bomb-Sniffing Dogs
Early Solidus sold itself as the crypto industry's "bomb-sniffing dogs," Meir's phrase, specialized in catching bad actors on exchanges that operated well outside regulatory sight lines. The product was straightforward trade surveillance: algorithms trained to recognize spoofing patterns, layering tactics, coordinated pumps.
What evolved was the architecture—and the ambition. By 2025, the company had rebranded its flagship product as HALO and draped it in the language of "agentic-based compliance," a term that started cropping up in fintech coverage that spring. According to Solidus, HALO doesn't just monitor order books. It correlates them with on-chain transaction flows, off-chain data, social media chatter, open-source intelligence, and behavioral patterns. The platform plays nicely with Chainalysis, TRM Labs, Elliptic—whatever blockchain forensics vendor a client already uses.
The value proposition, in theory, is cutting through the noise. Legacy surveillance systems drown compliance teams in false positives—thousands of alerts that turn out to be nothing. HALO, Solidus claims, monitors "over a trillion events per day" for clients around the world. That figure is unverified marketing speak, but the partnership announcements suggest there's substance beneath the spin.
When Traditional Finance Started Shopping Around
Around February of this year, Kalshi—a CFTC-regulated prediction market—announced it had selected Solidus for trade surveillance. The press release emphasized HALO's ability to stitch together user behavior, social sentiment, and open-source intelligence across both on-chain and off-chain data streams. A month later, Webull, the retail brokerage platform, signed on for digital-asset surveillance across U.S. and Canadian operations.
In May, B2C2, a significant crypto liquidity provider, deployed HALO globally—spanning operations in the UK, U.S., France, Luxembourg, Singapore, and the Cayman Islands. Later that same month, Hong Kong's EXIO Group, a licensed virtual asset trading platform, joined the client list, positioning the deal as a "bridge between TradFi and digital assets."
These weren't crypto-native upstarts trying to get ahead of regulators. They were firms with genuine exposure to traditional finance, choosing a vendor that had cut its teeth in the regulatory badlands. Perhaps—and this is the subtext nobody quite says out loud—tools forged in crypto's unregulated chaos adapt better than systems designed for 1990s-era equities markets.
Other deals filled out the mosaic. FalconX, a CFTC-registered swap dealer, came aboard in June 2024. EDX Markets—a consortium-backed exchange with backing from Fidelity, Charles Schwab, and Citadel Securities—partnered with Solidus for transaction monitoring in August 2023. Paxos expanded its existing arrangement in October 2025.
Building the Bilingual Surveillance Platform
Solidus now employs somewhere between 51 and 200 people, according to LinkedIn tallies—not the most precise headcount, but indicative of a firm scaling without fanfare. It maintains offices in New York, Singapore, Hong Kong, Cyprus, Tel Aviv, and London. The marketing line for HALO has settled into a neat duality: "born in crypto, built for Wall Street."
It's a framing that mirrors a larger convergence underway. Tokenized securities, stablecoins, prediction markets—the boundaries separating digital from traditional assets are getting harder to draw with confidence. Compliance infrastructure that speaks both dialects suddenly looks less like a hedge and more like a necessity.
The timing lines up with a wider push into what the industry is calling "agentic" compliance. A startup named Hadrius reportedly announced $27 million in combined seed and Series A funding last summer, marketing itself as agentic compliance infrastructure. Solidus, having surfaced the concept publicly in mid-2025 and armed with a roster of institutional clients, appears to have gotten there first.
The Unanswered Question
Whether the agentic AI model delivers on its productivity promises is still an open matter. Compliance officers, as a rule, are professionally skeptical of vendor claims—they've heard the pitch for transformative technology before. But the client roster suggests something is resonating. In a regulatory environment where crypto and traditional finance are colliding in real time, a platform that understands both worlds—that can trace a transaction from a blockchain address through a brokerage account and correlate it with a Reddit thread—may simply have structural advantages.
What's striking is that Solidus didn't need fresh capital to execute this pivot. The firm raised its last round in mid-2022 and has been operating on those proceeds ever since. It didn't manufacture a new market. It followed the one already forming, quietly building the connective tissue between two financial ecosystems that increasingly refuse to stay separate.
Sometimes the smartest move is just being fluent in the language the market is starting to speak.
