AT A GLANCE
FUNDING HISTORY
Gusto
SpaceX
BUSINESS MODEL
Gusto
Gusto charges a monthly base fee plus a per-employee fee. The Simple plan starts at $40/month plus $6 per employee per month.
Plus and Premium tiers add features like time tracking, PTO management, and dedicated support at higher price points.
The per-employee pricing creates natural revenue growth — as customers hire more people, Gusto makes more money without any additional sales effort. This aligns Gusto's success with their customers' growth, which is a beautiful incentive structure.
Additional revenue comes from embedded financial products. Gusto Wallet (employee banking), Gusto-run health benefits, 401(k) administration, and workers' comp insurance all generate fees.
The payroll platform becomes a distribution channel for financial services — once you process payroll for a company, you have a direct relationship with every employee and can offer them financial products.
SpaceX
SpaceX makes money three ways. First, launch services — companies and governments pay SpaceX to put their satellites into orbit.
A Falcon 9 launch costs about $67 million, which undercut the competition by 75% when it debuted. Second, Starlink — SpaceX's own satellite internet constellation, which is now generating over $6 billion in annual revenue from 4+ million subscribers.
Third, government contracts — NASA pays SpaceX to ferry astronauts to the International Space Station and the DoD pays for national security launches.
The secret sauce is reusability. Before SpaceX, every rocket was used once and thrown into the ocean.
SpaceX figured out how to land the first stage booster back on Earth and fly it again. A single Falcon 9 booster has flown over 20 times.
That's like the difference between throwing away an airplane after every flight versus keeping it for decades.
HOW THEY STARTED
Gusto
Josh Reeves, Edward Kim, and Tomer London were Stanford engineering graduates who noticed that every small business owner they talked to hated the same thing: payroll. Running payroll meant calculating federal, state, and local taxes, filing quarterly returns, issuing W-2s, managing direct deposits, and dealing with an alphabet soup of compliance requirements (FICA, FUTA, SUTA).
One mistake and the IRS sends a penalty notice.
The existing solutions were terrible for small businesses. ADP and Paychex dominated the market but were designed for mid-to-large companies.
Their interfaces looked like they were built in 1998 (because they were). Their pricing was opaque.
Their customer service required calling a 1-800 number and sitting on hold. Small businesses with 5-50 employees were dramatically underserved.
The trio founded ZenPayroll in 2011 (rebranded to Gusto in 2015) with the mission of making payroll dead simple. The first version was a clean web interface that let business owners run payroll in a few clicks — enter hours, review the numbers, hit submit.
Gusto calculated all taxes automatically, filed them with the government, and sent direct deposits. What used to take half a day took five minutes.
SpaceX
In 2001, Elon Musk had just sold PayPal to eBay for $1.5 billion and was sitting on roughly $180 million after taxes. Most people would buy an island.
Musk decided to buy rockets. His original idea was even weirder — he wanted to send a small greenhouse to Mars called "Mars Oasis" to reignite public interest in space exploration.
He flew to Russia three times to buy refurbished ICBMs. The Russians kept raising the price and at one point literally spat on him.
On the flight home from that last failed Russia trip, Musk opened a spreadsheet and started calculating the raw material costs of building a rocket from scratch. He realized the materials were only about 3% of the typical price of a rocket.
The rest was markup, inefficiency, and monopoly pricing by companies like Boeing and Lockheed Martin. He decided to build his own.
SpaceX was founded in June 2002 in a warehouse in El Segundo, California. Musk put in $100 million of his own money.
He hired Tom Mueller, a legendary rocket propulsion engineer who had been building rocket engines in his garage as a hobby. The first rocket, Falcon 1, was supposed to be the cheapest orbital rocket ever built.
It took six years and three spectacular explosions before it finally worked.
HOW THEY GREW
Gusto
Gusto grew by being the payroll platform that accountants recommended. Accountants manage payroll for thousands of small businesses, and Gusto built a dedicated Partner Program for accounting firms.
When a CPA recommends Gusto to all their small business clients, that's efficient distribution at scale.
The product-led growth motion is strong. Gusto's clean design and simple setup meant small business owners could sign up, enter their employee information, and run their first payroll without talking to a salesperson.
Free trials converted at high rates because the alternative was going back to manual calculations.
Expanding from payroll into HR, benefits, and financial services followed the natural workflow. Once Gusto ran payroll, adding benefits administration was a natural upsell — the same system that calculates pre-tax deductions can also manage the benefits that create those deductions.
SpaceX
SpaceX's growth strategy was simple: be cheaper than everyone, then be better than everyone, then be the only option.
They started by undercutting the launch market. The United Launch Alliance (Boeing + Lockheed Martin joint venture) was charging $300-400 million per launch.
SpaceX offered $67 million. Government agencies and commercial satellite companies started lining up.
Reusability was the real game-changer. Landing a rocket booster looked like science fiction when SpaceX first attempted it in 2013.
They failed over and over — spectacular ocean landings, explosions on drone ships, near-misses. But in December 2015, a Falcon 9 first stage landed back at Cape Canaveral.
It was the first time an orbital-class rocket had ever landed after a mission. Now they do it routinely — it's almost boring.
Starlink created a completely new revenue stream. Instead of just launching other people's satellites, SpaceX launched thousands of its own.
By 2024, Starlink had over 4 million subscribers and was generating billions in revenue. It turned SpaceX from a launch company into a telecom company.
THE HARD PART
Gusto
ADP and Paychex aren't going to cede the small business market quietly. ADP Run is their small business product, and they've been modernizing it aggressively.
ADP has 70+ years of trust, massive sales teams, and relationships with every accountant in America. Gusto has a better product experience, but ADP has distribution that's hard to match.
Rippling is the most dangerous competitor. Parker Conrad (Rippling's CEO) is building an "all-in-one" HR/IT/Finance platform that includes payroll alongside device management, app provisioning, and expense management.
Rippling argues that payroll should be one feature in a broader system, not a standalone product. If companies buy Rippling for IT management and get payroll included, Gusto loses the deal.
Moving upmarket is hard. Gusto's sweet spot is companies with 1-100 employees.
Larger companies have more complex needs — multiple pay schedules, union rules, multi-state compliance, custom integrations — that Gusto's platform historically hasn't handled as well as incumbents.
SpaceX
The early days nearly killed the company. SpaceX's first three Falcon 1 launches all failed.
The first one in 2006 crashed 25 seconds after liftoff due to a corroded fuel line nut. The second in 2007 reached space but the second stage shut down early.
The third in 2008 failed because the first and second stages collided during separation. Musk had enough money for one more attempt.
If flight four failed, SpaceX was dead.
Flight four worked. On September 28, 2008, Falcon 1 became the first privately developed liquid-fuel rocket to reach orbit.
Musk has said he was so stressed during that period he was throwing up regularly.
The financial pressure was existential. Musk was simultaneously funding Tesla, which was also on the brink of bankruptcy in 2008.
He had to split his last $40 million between the two companies. He borrowed money for rent.
But right at the end of 2008, NASA awarded SpaceX a $1.6 billion contract to resupply the International Space Station. That contract saved the company.
Starship development has been its own saga. The rocket has exploded multiple times during testing.
Each failure costs hundreds of millions. But SpaceX treats failures as data — they move faster by blowing things up and iterating than competitors do by being cautious.
THE PRODUCTS
Gusto
Gusto Payroll — automated full-service payroll processing with tax calculations, filings, and direct deposits across all 50 states. Gusto Benefits — health insurance, dental, vision, 401(k), HSA, FSA, commuter benefits, and workers' compensation administered through the platform.
Gusto HR — hiring and onboarding tools, employee self-service portal, org charts, and document management. Gusto Time & Attendance — built-in time tracking with PTO management, holiday calendars, and overtime calculations.
Gusto Wallet — a free employee financial wellness app offering early wage access, savings accounts, and financial planning tools.
SpaceX
Falcon 9 is the workhorse — the most-launched rocket in the world. It carries satellites to orbit and astronauts to the ISS, and the first stage lands itself for reuse.
Falcon Heavy is three Falcon 9 boosters strapped together — the most powerful operational rocket in the world until Starship came along. Dragon is the spacecraft that carries astronauts and cargo to the ISS.
It's the only American vehicle currently flying humans to space. Starlink is the satellite internet service — over 6,000 satellites in orbit delivering broadband to 100+ countries.
Starship is the big one — the tallest and most powerful rocket ever built, designed to carry 100+ people to Mars. It's still in testing but has already completed a full flight.
WHO BACKED THEM
Gusto
Google Capital (now CapitalG) led the Series C. General Catalyst invested early and has been in multiple rounds.
Dragoneer, T. Rowe Price, and Fidelity participated in later growth rounds.
Y Combinator was the starting point (Winter 2012 batch). The company was valued at $9.5 billion in its latest funding round in 2022.
SpaceX
Founders Fund, Draper Fisher Jurvetson, Google, Fidelity Investments, Valor Equity Partners, Baillie Gifford, a]6z (Andreessen Horowitz), NASA (as customer/partner)