Robinhood

Liquid AI

Robinhood

Robinhood makes money in ways that don't involve charging users directly. The biggest revenue source is payment for order flow (PFOF) — when users place a trade, Robinhood routes it to market makers like Citadel Securities, who pay Robinhood for the right to execute the trade.

This generates hundreds of millions annually. Robinhood also earns interest on uninvested cash sitting in user accounts, margin lending (charging interest when users borrow money to trade), and Robinhood Gold — a $5/month subscription for larger instant deposits, professional research, and higher interest on cash.

Liquid AI

Liquid AI builds foundation models, the big general-purpose brains that power chatbots and other AI tools. The difference is efficiency.

Their models, called Liquid Foundation Models, are designed to do more with far less memory and computing power. Companies pay to use them, either through a cloud API or by running the models on their own machines.

That second option matters. A bank or a hospital often cannot send private data to someone else's server.

Liquid AI lets them keep the model in-house. The pitch to a customer is basically this.

You get strong AI without renting a mountain of expensive chips.

Robinhood

Vlad Tenev and Baiju Bhatt met as physics and math students at Stanford. After graduating, they moved to New York and started two fintech companies that sold trading software to hedge funds.

While building tools for Wall Street, they noticed something absurd: it cost brokerages essentially nothing to execute a trade electronically, but they were charging retail investors $7-10 per trade.

The math was simple. Electronic trading had driven costs to near zero, but brokerages kept the old pricing because customers didn't know better.

Tenev and Bhatt thought: what if we just charged zero? In 2013, they founded Robinhood with the explicit mission of democratizing finance — giving everyone access to the stock market with no commissions, no minimums, and a beautiful mobile app.

The app launched in 2014 with a waitlist that hit 1 million people before the product was even available. The pink-and-green design, the confetti animation when you made a trade, and the simplicity of the interface made investing feel approachable.

For millions of young Americans who had never bought a stock, Robinhood was the entry point.

Liquid AI

Liquid AI is a spinout from MIT's Computer Science and Artificial Intelligence Laboratory, better known as CSAIL. The core science came from Ramin Hasani, who spent his PhD studying the nervous system of a tiny worm called C.

elegans. That worm has just 302 neurons and still manages to move, hunt, and react to its world.

Hasani and his collaborators asked a simple question. What if you built an AI that worked more like those neurons and less like a giant static network?

The answer was the liquid neural network, a model whose internal wiring keeps adjusting even after training is done. The team incorporated the company in 2023.

Daniela Rus, who runs CSAIL and is one of the most respected robotics researchers alive, came on as a co-founder. So did Mathias Lechner and Alexander Amini, both longtime research partners of Hasani.

Robinhood

Robinhood grew by making investing feel like a game. The app was designed to be addictive — swipe to trade, confetti for your first purchase, notifications about stock movements.

It was investing designed for the smartphone generation. Critics called it "gamification of finance." Users called it the first trading app that didn't feel like it was designed in 1997.

The referral program was massive. Both the referer and the new user got a free stock when someone signed up.

People were getting free shares of Apple or Ford just for downloading the app. It spread through college campuses like wildfire.

By 2020, the average Robinhood user was 31 years old — decades younger than the average brokerage customer.

Zero commissions forced the entire industry to follow. In October 2019, Charles Schwab, TD Ameritrade, E-Trade, and Fidelity all dropped their trading commissions to zero within days of each other.

Robinhood had single-handedly destroyed the commission-based brokerage model that had existed for decades.

Liquid AI

The growth angle is size, or the lack of it. Most frontier models are so heavy they only run in data centers.

Liquid AI aims for models light enough to run on a phone, a car, or a factory robot. That opens doors the giants cannot easily reach.

The AMD partnership pushes the same idea. AMD makes chips, and it wants efficient models that show off its hardware.

So AMD led the Series A and became both an investor and a distribution partner. Liquid AI also releases open models to researchers, which builds a following before the sales team ever makes a call.

Robinhood

GameStop was the worst week in Robinhood's history. In January 2021, Reddit's r/WallStreetBets community drove GameStop stock from $20 to $483.

Millions of Robinhood users were buying. Then on January 28, Robinhood restricted buying of GameStop and several other meme stocks.

Users could only sell, not buy. The stock crashed.

The backlash was nuclear. Users accused Robinhood of siding with hedge funds against retail investors.

Vlad Tenev was dragged before Congress. The real reason was less sinister but equally damaging — Robinhood's clearinghouse (DTCC) demanded $3 billion in additional collateral due to the extreme volatility, and Robinhood didn't have it.

They had to raise $3.4 billion in emergency funding over a weekend. The company that built its brand on democratizing finance had restricted the most democratic stock trade in history.

The payment for order flow controversy never goes away. Critics argue that PFOF creates a conflict of interest — Robinhood profits by routing user trades to market makers rather than getting users the best possible price.

The SEC has considered banning PFOF entirely. If that happens, Robinhood loses its largest revenue source.

Post-IPO performance was brutal. Robinhood went public in July 2021 at $38 per share.

The stock briefly hit $70 on meme stock momentum, then cratered to under $8 by mid-2022 — a 90% decline. The company laid off 9% of staff in April 2022 and another 23% that August.

Liquid AI

The honest problem is Goliath. OpenAI, Google, Anthropic, and Meta have raised tens of billions of dollars between them.

Liquid AI has raised under $300 million. The transformer architecture those giants use is battle-tested and improving fast.

Liquid AI has to prove its different approach not only works but keeps working as models get bigger. Betting against the most successful design in AI history is bold.

It is also the kind of bet that ends in either a great acquisition or a quiet shutdown, with not much room in between.

Robinhood

Robinhood is a stock, options, and crypto trading app. The core product lets you buy and sell stocks, ETFs, and options with zero commissions.

Robinhood Crypto adds trading for Bitcoin, Ethereum, and other cryptocurrencies. Robinhood Gold is the premium tier — higher interest on cash, larger instant deposits, and Morningstar research reports.

Robinhood Cash Card is a debit card that earns cashback and rounds up purchases to invest spare change. Robinhood Retirement offers IRA accounts with a 1% match on contributions.

Robinhood Legend is their new desktop trading platform aimed at active traders.

Liquid AI

The main products are the Liquid Foundation Models, a family that ships in several sizes so a customer can pick the smallest one that does the job. The second generation, LFM2, arrived in 2025, including LFM2-VL vision-language models built for phones, laptops, wearables and embedded chips.

The company has leaned hard into on-device AI rather than the cloud. The focus is always the same.

Match the quality of a much larger model while using a fraction of the memory and power.

Robinhood

Sequoia Capital, Ribbit Capital, NEA, Index Ventures, Andreessen Horowitz, DST Global, D1 Capital

Liquid AI

It started with a $37.5 million two-stage seed in December 2023 at a $303 million valuation, from OSS Capital, PagsGroup, Automattic (the company behind WordPress), Samsung Next and others. Angels included GitHub co-founder Tom Preston-Werner, Shopify's Tobi Lütke and Red Hat co-founder Bob Young.

Then AMD Ventures led the $250 million Series A in December 2024, which is unusual because AMD is a chipmaker, not a typical venture fund. That backing gave Liquid AI both money and a hardware ally.

When a major chip company writes the lead check on an efficiency-focused model maker, it signals a bet that the future of AI is not just bigger, it is leaner.