Embedded Payments & Fintech for Vertical Software — renting the rail
Entry signal — what decides who wins here
Structure decidesThe binding constraint is not executional. Being better than the incumbent does not, by itself, get you in — this one is cleared with capital, an asset, or a permission.
Raise or borrow the entry ticket, or buy an operator who has already paid it. The barrier is money rather than permission, so it yields to a balance sheet — and an acquisition is usually cheaper than a start.
Measured, not forecast: the share of US establishments opening in one year that were still active later. It counts good operators and bad ones together, which is exactly why it is the honest answer to “what are the odds”. It is for the whole sector rather than this market, and the ten-year figure comes from an older cohort because no younger one has reached ten years.
This is not a probability of success, and it is not a verdict on you. No survival probability is published per market, and inventing one would be worse than saying so. What the bar reads is how much of the outcome sits inside an operator's control: green means the hurdles are ones a better operator clears, red means the binding constraint is capital, an asset or a permission rather than execution. Someone arriving with an advantage this screen did not assume can win a market shown in red.
Companies named in this market · 25
The binding constraint — entry cost + regulatory drag
The thesis behind this category is true, and the proof is on EDGAR — which is exactly why it is a bad place for a new entrant. Toast's FY2025 10-K (year ended 2025-12-31) reports financial technology solutions revenue of $5,037M against subscription services revenue of $936M, on $195.1B of gross payment volume [A]. Payments is 5.4x the software line by revenue and still bigger by gross profit — $1,146M from fintech against $672M from subscriptions, computed from the 10-K's own cost-of-revenue table — even though the fintech margin is about 23% against 72% for software. AppFolio shows the same shape in property management: Value Added Services (electronic payments, tenant screening, risk mitigation) $721.5M against subscription services $211.5M in FY2025 [A]. The atlas's own vertical records reach the same answer from the other side: payments and insurance attach decides self-storage (Storable), marina (DockMaster Payments, Storable Marine), salon (Fresha at zero subscription), medspa (Boulevard, Zenoti) and field-service (Jobber, Housecall Pro) — all of them treat the licence as the cheap part. But the value flows to the software company that owns the merchant, not to the rail it rents. The infrastructure layer underneath is held by two giants. Stripe says businesses on it generated $1.9 trillion of volume in 2025, up 34%, and priced a tender offer at $159B (newsroom, 2026-02-24) [B]. Adyen reported FY2025 net revenue of EUR 2,364.2M on EUR 1,394.3B processed, with issuing volumes up 8x as platforms embedded cards (H2 2025 results, 2026-02-12) [A]. Below them the processors bought their way in: FIS bought Payrix in 2022, and Global Payments completed its purchase of Worldpay on 2026-01-12, serving more than 6 million merchant locations on $3.7 trillion of volume with an 'Integrated & Platforms' channel [A, 8-K]. The venture-funded challengers are small next to that and are selling the same thing: Finix (over $208M raised, Series C led by Acrew), Rainforest ($57.5M, Series B led by Matrix and Infinity Ventures, 2025-09-08), Tilled (nearly $40M), Infinicept ($23M growth round, 2022), Moov ($77.5M). Each one positions itself as cheaper or more vertical-friendly than Stripe — Rainforest's model is a consumption-based cut of each transaction with no platform fee [B] — which means the wedge is price, paid for out of a thin interchange margin. The adjacent layers (BaaS: Unit $169.6M, Treasury Prime ~$73M; embedded lending: Parafin $194M; embedded payroll: Check, $75M Series C led by Stripe) last raised in 2021-24 and none has announced a larger round since in the coverage opened here. An entrant needs a sponsor bank, card-network registration, underwriting and risk reserves before earning its first basis point, then has to win platforms that can renegotiate or switch processors once their volume is large. Entry cost and regulatory drag decide it. The money in this theme is earned by building the vertical software and attaching one of these rails — the right move for a Research Upon vertical, not a market to enter as the rail.
Sectors joined: FinTech · Fintech · Web3 · Financial Technology · Financial Services · Fintech SaaS
[UNVERIFIED] Sector-to-NAICS mapping is analyst judgment — see data/angel-sector-map.json. Counts are a per-record cross-reference and are not additive across records.
The incumbent
Who owns this market and who is coming for it. Fields a screen never reached say so rather than guessing.
Financials & market size — sourced
Figures that came from a filing, a results release or reputable reporting, each carrying its evidence tier.
Market size, derived
Built from the competitor set upward rather than quoted from a forecast. Published TAMs in these categories are frequently reverse-engineered from each other, so any published figure is checked against the vendor arithmetic rather than trusted on its own.
Disclosed revenue from 2 of 14 named vendors. The market is at least this large.
No vendor has both a disclosed revenue and a published share.
Only a revenue floor is known — the true market is larger by whatever the undisclosed vendors earn.
Competitor set · 14 named · 2 disclose revenue
| Name | Revenue | Share | Note |
|---|---|---|---|
| Stripe (Connect)B | not disclosed | — | Private; publishes no revenue. 2025 annual letter (newsroom, 2026-02-24): $1.9T total volume, +34%, tender offer at $159B; 'more than 5 million businesses directly or via platforms'. Connect volume not broken out. Last primary round: Series I, more than $6.5B at $50B (2023-03-15), largely for employee liquidity — The default rail for vertical SaaS; also led Check's Series C |
| Adyen (Adyen for Platforms)Euronext Amsterdam: ADYENA | not disclosed | — | FY2025 net revenue EUR 2,364.2M, processed volume EUR 1,394.3B (H2 2025 results, 2026-02-12). Not entered as revenue here: the figure is EUR and the Platforms segment is not separated in the press release opened. A Platforms growth rate of ~45-55% appears only in search summaries and was NOT verified — Issuing volumes up 8x YoY 'as platforms embedded cards into core workflows' |
| Worldpay for Platforms (Payrix)A | not disclosed | — | Payrix (Atlanta, founded 2015) acquired by FIS 2022-02-14, price undisclosed and 'not expected to be material'; Worldpay then sold by FIS and GTCR to Global Payments, completed 2026-01-12. Combined Global Payments: $3.7T volume, 6M+ merchant locations, an 'Integrated & Platforms' channel; no Payrix line disclosed |
| FinixB | not disclosed | — | Private. $75M Series C (2024-10-24) led by Acrew Capital, co-led by Leap Global and Lightspeed; over $208M raised in total (Finovate) |
| Rainforest PayB | not disclosed | — | Private, Atlanta. $29M Series B (2025-09-08) led by Matrix and Infinity Ventures; $57.5M total (Crunchbase News). 'Billions' of live volume claimed [C] |
| TilledB | not disclosed | — | Private, Boulder. $12.5M round (2024-10-29) led by Canvas Ventures and UPC Capital Ventures; nearly $40M since 2019 (company release) |
| InfiniceptB | not disclosed | — | Private, Denver. $23M growth round (2022-05-11) led by SVB Financial Group and Piper Sandler Merchant Banking; earlier undisclosed investment from Mastercard and MissionOG (2020). Total not disclosed |
| MoovB | not disclosed | — | Private, Iowa. $45M Series B (2023-01-31) led by Commerce Ventures with a16z, Bain Capital Ventures, Visa; $77.5M total (Fortune) |
| UnitB | not disclosed | — | Private BaaS, New York/Tel Aviv. $100M Series C (2022-05-17) led by Insight Partners at $1.2B; $169.6M total (Insight Partners release). No later round found in coverage opened |
| Treasury PrimeB | not disclosed | — | Private BaaS, San Francisco. $40M Series C (2023-02-01) led by BAM Elevate; about $73M total (TechCrunch) |
| Parafin Inc.B | not disclosed | — | Private embedded lending. $100M Series C (2024-12-18) led by Notable Capital at $750M valuation; $194M total; funds 'nearly $1 billion annually' to small businesses [C for the volume] |
| CheckB | not disclosed | — | Private embedded payroll (Check Technologies). $35M Series B led by Stripe and Thrive ($44M total at launch, Jan 2021); later $75M Series C led by Stripe (Coverager). Running total not stated by a source opened |
| ToastNYSE: TOSTA | $6.2B | — | FY2025 10-K: fintech $5,037M, subscriptions $936M, hardware/services $180M. Listed as the proof of the pattern — a vertical software company whose payments line is 5.4x its software line — not as a rail vendor |
| AppFolioNASDAQ: APPFA | $951M | — | FY2025 10-K (filed 2026-02-05): Value Added Services $721.549M vs subscription $211.457M. Second tier-A proof of the pattern, in property management |
Startups & challengers
Newer and smaller vendors going at the incumbent — funded challengers first. Named, not researched to the depth of the field above; a company with a page here links to it.
| Company | Stage | What it does | Raised |
|---|---|---|---|
| Baselane | Funded challenger | Banking, rent collection and bookkeeping built for small landlords | — |
| Cloudtrucks | Funded challenger | Load booking plus pay, cards and cash-flow tools for owner-operator truckers | — |
| Coast ↗ | Funded challenger | Fuel and fleet charge cards with spend controls for trucking and field-service fleets | — |
| Flywire | Funded challenger | Payments and receivables for universities, hospitals and travel firms. | $100m |
| Hearth | Funded challenger | Consumer financing, payments and estimates for home improvement contractors | — |
| Roadsync | Funded challenger | Payments for freight fees (lumper, gate, repairs) between carriers, warehouses and shops | — |
| TruckSmarter | Funded challenger | Load board plus fast pay and banking for owner-operator truckers | — |
| WeTravel | Funded challenger | Booking and payments for multi-day tour and group travel operators. | — |
| AirPay | Startup | Patient payment collection and billing automation built for dental offices | — |
| BuyChain | Startup | Trade and payment network connecting lumber and building-material dealers with suppliers | — |
| Nickel | Startup | Free B2B payments and receivables for construction suppliers and contractors | — |
| Pearly | Startup | Patient billing, payment plans and collections for dental practices | — |
Vendor landscape
Market leaders, the full paid field, and every open-source alternative. Where a free tier exists it is what sets the price floor, so it is analysis rather than an appendix.
$1.9T total volume 2025; $159B tender valuation [B]
EUR 2,364.2M FY2025 net revenue; EUR 1,394.3B processed [A]
$3.7T volume, 6M+ merchant locations after 2026-01-12 close [A]
Paid field · 8 vendors
Default rail
Listed; issuing growing fastest
Now inside Global Payments
Venture-funded; sell on revenue share and price
Holds its own acquiring and issuing connections
BaaS; dependent on sponsor banks
Lends through the platform
Stripe-backed
Open source · none — there is no price floor
No open-source substitute exists at the money-moving layer: acceptance requires a sponsor bank, card-network registration and PCI compliance, none of which code can supply. Open-source payment orchestration layers route between processors but still need one — none was checked for this record.
Three layers, one buyer. The buyer is the vertical software company, which embeds (1) card and ACH acceptance as a PayFac or on a PayFac-as-a-service rail, (2) accounts, cards and payouts through a BaaS provider and sponsor bank, and (3) capital and payroll as add-ons. Stripe and Adyen sell all three layers; the challengers each sell one. The vertical records in this atlas (restaurant, self-storage, marina, salon, medspa, cleaning) show the vertical software company keeps the margin, the rail does not.
Evidence
Evidence. Tier A, opened: Toast FY2025 10-K (EDGAR, downloaded 2026-10-08) revenue and cost-of-revenue tables and the GPV key metric; AppFolio FY2025 10-K (filed 2026-02-05) revenue table and the Value Added Services description; Adyen H2 2025 results release (2026-02-12); Global Payments 8-K exhibit 99.1 announcing completion of the Worldpay acquisition (2026-01-12); FIS's Payrix acquisition release (2022-02-14). Tier B, opened: Stripe newsroom 2025 annual update (2026-02-24) and Series I release (2023-03-15); Crunchbase News on Rainforest (2025-09-08); Finovate on Finix (2024-10-24); Tilled's own release (2024-10-29); Insight Partners on Unit (2022-05-17); TechCrunch on Treasury Prime (2023-02-01); Finance Director Europe on Parafin (2024-12-18); Fortune on Moov (2023-01-31); Digital Transactions on Infinicept (2022-05-11 and 2020-11-17); Coverager on Check's Series C. Pattern evidence from this atlas's own records: 722511 restaurant operations, 531130 self-storage, 713930 marina, 812115 salon, 812190 medspa, 561722 cleaning. NOT sourced: any market size for embedded payments — no dollar figure for the category is asserted; Stripe Connect and Adyen Platforms volumes; any revenue for Finix, Rainforest, Tilled, Infinicept, Moov, Unit, Treasury Prime, Parafin or Check — all UNVERIFIED and none published; Adyen's Platforms growth rate (search summaries only); Check's Series C date and running total; whether any BaaS player has raised since 2023 (none found, but absence was not proven). Toast's homepage and Payrix's site blocked automated retrieval, so neither appears in the companies file. Verify before acting.
Where the industry talks
The associations, forums and events where people in this trade actually talk shop — where to listen before entering, and where the first customers are found. Each link was opened on the date shown.
The payments industry's trade association (US-based, international members); policy, education, events including TRANSACT. States its members process over $56.75 trillion a year; no member count stated.
The largest fintech and payments trade show; October 18-21, 2026, Las Vegas, per its own site. Embedded finance and PayFac vendors exhibit here.
Operates Canada's clearing and settlement systems for its member financial institutions; $103 trillion processed a year per its site. Relevant to any rail expanding into Canada (Rainforest's stated next market).
Industry Dive's payments news site; covers processors, PayFacs and acquisitions. No readership figure stated.
Substack newsletter on fintech and banking-as-a-service, including sponsor-bank and BaaS regulatory issues. No subscriber count verified.
verticalsoftware.fyi, the newsletter behind this theme, serves a Notion page that could not be read automatically, so it is not listed. Nacha (ACH rules body) was reachable but is a rules operator rather than a community for this buyer, so it is left out.