Cielo, and What Happens to an IncumbentNarrow moat
StoneCo (STNE) — moat facet
Cielo still has the largest share in Brazil and a fraction of its former value: the volume stayed and the margin did not, which is the honest frame for StoneCo's own position.
Cielo remains, on the January 2026 numbers, the largest acquirer in Brazil at about 28 percent2. It is also the clearest illustration in this file of what the last decade did to the industry, because it used to have something close to all of it.
Cielo was built by Bradesco and Banco do Brasil in an era when acquiring was a duopoly, terminals were rented at high monthly fees, and merchants had nowhere to go. StoneCo's entire founding proposition was that this arrangement was indefensible. In 2017 it became the first non-banking entity authorised by Brazil's Central Bank to operate as an acquirer through a payments-institution licence1, and the pricing that followed took the industry's margins apart.
The relevant lesson is not that StoneCo won. It is what winning did to the economics. Cielo's share is still the largest in the country and its market value is a small fraction of its peak, because the volume stayed and the margin did not. An industry can be simultaneously large, growing and a poor place to own a business.
That is the honest frame for StoneCo's own position. It disrupted a fat incumbent, and the reward for doing so is a business with a 22 percent share earning a take rate that everyone is still trying to undercut.
Watch what happens to Cielo's take rate rather than its share. It is the closest thing available to a forward look at where a competitive acquiring market settles when nobody has pricing power.
Cielo's position has settled. It still holds the largest share in Brazil at about 28 percent and it long ago lost the margin that share used to carry. That combination is not deteriorating further so much as demonstrating where a competitive acquiring market comes to rest — which is the reason this page exists.
The incumbent kept the volume and lost the margin; StoneCo's own falling transaction revenue (-35.1% in Q2 2026) is the same path.
Source: NeoFeed / UBS BB acquirer tracking, January 2026 ↗- ReportedIn 2017 StoneCo became the first non-banking entity authorised by Brazil's Central Bank to operate as an acquirer, through a payments-institution licence.StoneCo Ltd. Form 20-F for FY2025 (CIK 1745431) — active payment clients of 4,803.5 thousand at 31 December 2025, against 4,172.7 thousand in 2024 and 3,522.1 thousand in 2023; TPV of R$560.9 billion, against R$516.2 billion and R$438.3 billion; revenue of R$14,153.8 million and adjusted net income from continuing operations of R$2,477.2 million; more than 3.6 million banking active clients, the majority of whom are also payment clients; retail deposits of R$11,091.0 million against R$8,704.8 million and R$6,119.5 million; a credit portfolio of R$2,836 million with expected credit losses of R$389.7 million, against R$1,207.6 million and R$144.5 million a year earlier; clients divided into MSMBs (micro-merchants and SMBs) and Key Accounts, 'comprised of platform services and sub-acquirers'; StoneCo became in 2017 the first non-banking entity authorised by the Central Bank to operate as an Acquirer through a payments-institution licence, and is among the six largest players by total card volume per ABECS; distribution through proprietary and franchised hubs sold on 'service differentiation as the main driver', digital channels, and more than 500 Strategic Partners at December 2025; per the Central Bank, Pix's share of the total number of transactions rose from 1% in Q4 2020 to 52% in H1 2025 and its share of monetary volume from 1% to more than 26%; the filing warns that 'the concentration of our clients by geography and economic sector may increase our risk' and that the company experiences churn from business closures and account transfers; interest rates directly affect both revenue generation and cost of funds, most third-party funding being linked to the Brazilian interbank rate; StoneCo's own analysis notes that US MSMB take rates have been stable over five years despite penetration around 120% of consumption, and finds no indication of saturation-driven price reductions in Brazilian cities with low cash usage — FY2025 · publ. 2026 · source ↗
- Third-party estimateCielo remained the largest Brazilian acquirer at about 28% share in January 2026.NeoFeed / UBS BB acquirer tracking, January 2026 — Cielo held first place with 28% market share, up 2 percentage points year on year; PagBank second with 26%, up 2 points; Itau's Rede third with 25%, the largest gain in the market at 5 points; StoneCo lost 2 points to 22%; Santander's Getnet fell to 9% by user count and 5% by transaction volume. Total Brazilian card transaction volume rose 10.1% in 2025 to R$4.5 trillion — January 2026 · publ. 2026 · source ↗