Enter the vertical everyone avoids by owning the core operational device, then attach payments as the real revenue engine and layer on every adjacent service that operation needs.
Toast
Toast is the restaurant operating system: cloud point-of-sale software, kitchen-grade Android hardware, and, critically, embedded card processing. Founded in December 2011 by three Endeca engineers (Steve Fredette, Aman Narang, and Jonathan Grimm), it is the definitive case of vertical SaaS that monetizes through fintech, where software is the wedge and payments are the engine. Each story below is one facet of the same machine: pick a hard vertical, own the terminal, attach payments, then sell everything else the restaurant needs.
Beachhead: full-service restaurants nobody else would build for
The problem. Restaurants are a brutal software market: thin margins, high failure rates, hardware that has to survive grease and volume, and workflows (coursing, modifiers, split tabs, tipping) that generalist POS systems handle badly. Legacy incumbents like Micros and Aloha were on-premise, expensive, and closed; Square was built for general retail, not full-service dining. Toast's founders learned this the hard way when their first product, a consumer payments and loyalty app, could not integrate with those closed legacy systems.
The approach. Rather than chase horizontal retail, Toast pivoted to build a purpose-built, Android-based cloud POS for full-service restaurants, hardware included, piloting it in Boston (its first live deployment was Firebrand Saints in Cambridge, Massachusetts, around 2012 to 2013). Owning restaurant-grade handhelds and kitchen display screens created a physical, sticky foothold that pure-software rivals could not match.
How it solved it. The operationally weird beachhead became a literal install base. By its S-1 (as of June 30, 2021), roughly 48,000 restaurant locations across about 29,000 customers ran on Toast, a foothold generalists never contested because the workflows were too specific to serve.
Business Model: revenue that grows with the restaurant's sales, not its seat count
The problem. Even if you win the restaurant vertical, a pure-SaaS POS is capped: you can only charge so much per terminal per month before churn spikes in a low-margin industry. Seat-based software pricing leaves most of the value on the table when the underlying business processes tens of thousands of dollars a day.
The approach. Toast chose to monetize primarily through payments, operating as a payment facilitator and taking a thin slice (roughly 55 basis points) of every dollar of gross payment volume flowing across its terminals. Revenue therefore scales with the customer's transaction volume, not the number of software seats.
How it solved it. The model produced far higher revenue-per-location than software alone ever could: in 2021, about 82% of Toast's revenue came from fintech/payments versus roughly 10% from subscription software and 7% from hardware. Gross payment volume reached $57.0 billion in 2021, up 124% year over year, turning each location into a volume-linked revenue stream rather than a flat monthly fee.
Land and Expand: from the terminal into the entire back office
The problem. A POS terminal alone is a single-product relationship, vulnerable to a cheaper competitor and limited in wallet share. To build durable, expanding accounts, Toast needed to become indispensable across more of the restaurant's operations, not just its front counter.
The approach. Once embedded at the point of sale, Toast cross-sold a widening suite: online ordering, delivery, marketing, loyalty, Toast Payroll, and financing through Toast Capital. Each module attached to the same account Toast already owned, deepening the relationship into the back office and the payroll office.
How it solved it. Expansion within existing restaurants became a growth engine on its own. SaaS ARPU reached roughly $20,000 per location per year, net revenue retention ran above 110% (meaning existing customers grew their spend even before new logos landed), and the lending arm alone, Toast Capital, originated over $1 billion in loans during 2024.
Recurring Revenue: 10% of revenue that earns the right to the other 82%
The problem. If payments are the money-maker, why build software at all, and why keep the subscription business if it is a small share of revenue? The risk is treating software as a loss leader and letting it wither, which would erode the very reason restaurants stay.
The approach. Toast kept software as both the wedge and the moat: a genuine restaurant operating system (ordering, kitchen display, online ordering, loyalty, payroll) that owns daily operations and makes ripping out Toast painful. The recurring subscription layer is what justifies and defends the payments attach.
How it solved it. Software was only about 10% of 2021 revenue but the recurring foundation everything else rides on, and its expansion is measurable: annual recurring revenue crossed roughly $568 million at the end of 2021 and grew to about $1.7 billion by March 31, 2025, across roughly 140,000 locations. The software moat is what earns Toast the right to process every transaction.
Pricing & Packaging: cheap software up front, basis points in the background
The problem. Restaurants are price-sensitive and wary of large upfront software bills, so a high sticker price for the POS would slow adoption in exactly the market Toast targeted. But Toast still needed to monetize richly to justify building restaurant-grade hardware and a full software suite.
The approach. Toast packaged the offer so the software lands the account cheaply while payment processing does the monetizing: a low, sometimes near-zero, entry point on subscription combined with a per-transaction take rate (roughly 55 basis points, reported around 58 bps by Q4 2025) on gross payment volume. The visible price is small; the real charge is embedded in every swipe.
How it solved it. The packaging is why about 82% of 2021 revenue came from fintech/payments while subscription stayed around 10%: the restaurant experiences an affordable system, and Toast captures value proportional to the restaurant's own sales. Low friction to adopt, high monetization at scale, the two goals that usually trade off against each other, held together in one price structure.