Chime

OpenAI

Chime

Chime makes money almost entirely from interchange fees. Every time a Chime member uses their debit card, the merchant pays a swipe fee (typically 1-2% of the transaction).

Chime keeps a portion of that interchange. The model only works at scale — Chime needs millions of members making thousands of transactions to generate meaningful revenue.

But with 22 million members, the math works. Chime also earns interest on member deposits and fees from optional instant transfer services.

OpenAI

OpenAI makes money primarily through API access and subscriptions. The API charges developers per token (roughly per word) for using GPT models in their applications.

ChatGPT Plus costs $20/month for individual users, ChatGPT Team is $25-30/user/month, and ChatGPT Enterprise is custom-priced. Microsoft pays OpenAI licensing fees and also resells OpenAI models through Azure OpenAI Service.

OpenAI's annualised revenue ran past $13 billion during 2025 and kept climbing from there, which is the kind of growth curve that normally only exists in a pitch deck.

Chime

Chris Britt spent years working in financial services — at Visa, Green Dot, and other companies — and kept seeing the same thing: banks made a disproportionate amount of their revenue from fees charged to their least wealthy customers. Overdraft fees alone generated $35 billion annually for US banks.

The average overdraft was $36 for a $24 transaction — that's a 150% fee. Poor people were subsidizing free checking for rich people.

In 2012, Britt co-founded Chime with Ryan King (CTO) to build a bank account designed for people living paycheck to paycheck. The core promise was radical: no monthly fees, no minimum balance, no overdraft fees, ever.

You'd get your direct deposit up to two days early (because Chime could release funds as soon as they were notified of a pending deposit, while banks sat on the money for two extra days), and you could overdraft up to $200 without any penalty through a feature called SpotMe.

The product launched in 2014 and grew slowly at first. But the target market — working-class Americans frustrated with bank fees — was enormous.

Once people tried Chime and realized they'd never see another $35 overdraft fee, they told everyone they knew.

OpenAI

OpenAI was founded in December 2015 as a nonprofit AI research lab. The founding donors — including Elon Musk, Sam Altman, Peter Thiel, Reid Hoffman, and Jessica Livingston — pledged $1 billion with a mission to build artificial general intelligence (AGI) that would benefit all of humanity.

The idea was that AI was too important and too dangerous to leave in the hands of Google alone.

Sam Altman became chairman while Greg Brockman (former CTO of Stripe) became president. Ilya Sutskever, one of the most respected AI researchers alive, left Google Brain to become chief scientist.

The early team was stacked with world-class researchers who published their work openly — hence "Open" AI.

But AI research turned out to be staggeringly expensive. Training large models required millions of dollars in compute.

In 2019, OpenAI created a "capped-profit" subsidiary — investors could earn up to 100x their money, but profits beyond that would flow to the nonprofit. Microsoft invested $1 billion.

The mission was still to save humanity. The method now involved making a lot of money first.

Chime

Chime grew through massive direct-to-consumer advertising. TV commercials, YouTube ads, podcast sponsorships, Instagram campaigns — all hammering the same message: no fees, get paid early, no overdraft penalties.

The message resonated with a demographic that traditional banks ignored or exploited: working-class Americans earning $30,000-$75,000 per year.

The "get paid early" feature was the killer hook. Chime releases direct deposits up to two days before payday.

For someone living paycheck to paycheck, getting paid on Wednesday instead of Friday is life-changing. It reduced the need for payday loans and covered emergency expenses.

The feature spread through word of mouth faster than any ad campaign.

Simplicity was a deliberate choice. Chime doesn't offer investing, crypto, or dozens of products.

They do one thing — be a great bank account for everyday Americans — and do it well. While competitors like Cash App and Revolut chased feature bloat, Chime stayed focused on the core banking experience.

OpenAI

ChatGPT's launch in November 2022 was the growth strategy — it just wasn't planned that way. The team expected a modest research preview.

Instead, ChatGPT hit 1 million users in 5 days and 100 million monthly active users in 2 months, making it the fastest-growing consumer application in history. The product went viral because it felt like magic — for the first time, anyone could have a natural conversation with a machine that seemed to understand them.

The Microsoft partnership provided distribution at massive scale. Microsoft integrated OpenAI models into Bing, Office 365 (Copilot), GitHub (Copilot), and Azure.

Overnight, hundreds of millions of Microsoft users had access to OpenAI technology. Microsoft's $13 billion investment was the largest AI bet in history and gave OpenAI nearly unlimited compute.

The API created an ecosystem. Thousands of startups built products on top of OpenAI's models — from customer service bots to coding assistants to content generators.

Each API customer locked themselves into OpenAI's ecosystem, creating switching costs and recurring revenue.

Chime

Chime is not actually a bank. They're a fintech company that partners with Bancorp Bank and Stride Bank to hold deposits and issue cards.

This distinction matters because Chime doesn't have the regulatory protections and permissions that come with a bank charter. In 2021, the state of California ordered Chime to stop calling itself a bank in advertising.

The regulatory status limits what products Chime can offer and adds counterparty risk.

Unit economics have been questioned. Chime spends heavily on customer acquisition — hundreds of dollars per member through advertising.

If members don't use their Chime card frequently enough, the interchange revenue doesn't cover the acquisition cost. Chime needs high engagement to make the model work, and some members treat Chime as a secondary account rather than their primary bank.

The path to IPO has been repeatedly delayed. Chime was expected to IPO in 2022 but the fintech market crash made that impossible.

The company listed on Nasdaq in June 2025 at $11.6 billion, well below its 2021 peak of $25 billion. Public markets now price it in the open, which is a harsher judge than a private round.

OpenAI

The board crisis of November 2023 nearly destroyed the company. The nonprofit board fired Sam Altman as CEO on a Friday, citing a loss of confidence.

Within 48 hours, 95% of employees threatened to quit and follow Altman to Microsoft. By Tuesday, Altman was reinstated and the board was restructured.

The incident exposed the fundamental tension between OpenAI's nonprofit governance and its for-profit ambitions — a tension it finally addressed in late 2025 by restructuring the business as a public benefit corporation sitting under the original nonprofit.

The cost of training frontier models is eye-watering. Each new GPT generation costs hundreds of millions to train.

OpenAI is reportedly spending over $7 billion annually on compute. The company is burning through cash faster than almost any startup in history, which is why it keeps raising at higher and higher valuations.

If revenue growth slows before costs stabilize, the math gets ugly.

Safety concerns are not going away. Multiple prominent researchers have left OpenAI over disagreements about the pace of development versus safety research.

Ilya Sutskever, the chief scientist who was central to the board's decision to fire Altman, left in 2024 to start a safety-focused AI lab. The public debate about whether OpenAI is moving too fast — and whether its safety commitments are genuine — grows louder with every capability improvement.

Chime

Chime Spending Account is the core — a fee-free checking account with a Visa debit card. Chime Savings Account offers automatic round-ups and a competitive APY.

SpotMe lets members overdraft up to $200 with no fees — Chime covers the difference and deducts it from the next deposit. MyPay gives members access to earned wages before payday.

The Chime Credit Builder card helps members build credit by reporting on-time payments to all three bureaus — no credit check required, no interest, secured by your own money. Instant Transfers move money between Chime members instantly.

OpenAI

ChatGPT is the consumer chatbot — the product that made AI mainstream overnight. The flagship GPT models are multimodal, handling text, images, and audio in one system.

The OpenAI API lets developers integrate GPT into any application. DALL-E generates images from text descriptions.

Whisper transcribes and translates audio. Sora generates videos from text prompts.

GPT Store lets users create and share custom GPT agents. ChatGPT Enterprise gives businesses a private, secure version of ChatGPT with admin controls and no data training.

Chime

DST Global, General Atlantic, Tiger Global, Sequoia Capital, SoftBank, Coatue Management, Dragoneer

OpenAI

Microsoft ($13B), Thrive Capital, Khosla Ventures, Sequoia Capital, Founders Fund, Tiger Global, SoftBank, a16z