Robinhood

Dandy

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.

Dandy

Vertical SaaS plus manufacturing. Dandy provides dental practices with intraoral scanners (often subsidized or free to eliminate the switching cost), cloud-based software for managing cases, and its own network of digital dental labs that manufacture the final restorations.

Dentists pay per case — each crown, bridge, veneer, or implant restoration is priced individually. The margin comes from manufacturing efficiency: digital workflows are faster, more precise, and require less manual labor than traditional hand-sculpted methods.

As volume grows, Dandy's labs get more efficient and per-unit costs drop. It's the classic razor-and-blades model — give away the scanner, make money on every restoration.

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.

Dandy

Henry Stott was a repeat entrepreneur who had previously co-founded a tech company in the UK. When he looked at the dental industry, he saw a $15 billion lab market that was shockingly analog.

Here's how it worked: a dentist jams a tray of gooey putty into your mouth, waits for it to harden, mails the physical mold to a dental lab, where a technician hand-sculpts your crown out of ceramic. Turnaround: 2 to 3 weeks.

Error rate: high. Patient experience: miserable.

The technology to do this digitally had existed for years — 3D intraoral scanners, CAD/CAM software, CNC milling machines — but nobody had stitched it into a seamless end-to-end platform for the average dental practice. Stott started Dandy in 2020 to be that platform.

Provide the scanner, build the software, run the lab — and make it so easy that any dentist can switch from analog to digital without changing how they practice.

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.

Dandy

Land-and-expand with dental practices. Dandy gives practices the scanner for free or at heavy discount, which eliminates the biggest barrier to switching from analog.

Once a practice starts submitting digital scans, they become recurring revenue — every patient who needs a crown is a Dandy order. Sales team targets mid-size practices (3 to 10 dentists) that are high-volume but haven't invested in digital yet.

Referral programs where existing dentists recommend Dandy to colleagues. Geographic density strategy — build lab capacity in a region, then saturate practices nearby to optimize logistics and turnaround times.

Content marketing educating dentists on why digital is better, faster, and more profitable than analog workflows.

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 23% of staff in April 2022 and another 23% in August 2022.

Dandy

Dental practices are notoriously resistant to change — many dentists have used the same lab for 20 years and switching feels risky. The scanner hardware is expensive to subsidize at scale, creating a capital-intensive land grab.

Quality control across distributed manufacturing is hard — a crown that doesn't fit means a remake, an unhappy patient, and a dentist who might switch back to their old lab. Competition from established digital players like Align Technology and legacy lab companies investing in their own digital capabilities.

The dental industry is fragmented — 200,000+ practices in the US, mostly small businesses, which means enterprise-style sales don't work. Each practice is its own decision maker with its own habits.

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.

Dandy

Dandy Scanner — provided to dental practices, captures a full 3D digital impression of the patient's mouth in minutes. No more putty molds.

Cloud-based case management platform where dentists submit scans, approve designs, and track orders. AI-powered restoration design that generates crown and veneer designs automatically from 3D scans, reducing turnaround from weeks to days.

Digital dental lab network with automated CNC milling and 3D printing for manufacturing restorations. Shade matching technology using AI to color-match restorations to surrounding teeth.

Integration with practice management software so cases flow seamlessly from scan to delivery.

Robinhood

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

Dandy

Investors include Bessemer Venture Partners, IVP, DST Global, and IA Ventures. Series C in 2023 valued the company at approximately $1.8 billion.