“Can a developer-first API bank become the default financial rails for Brazil's high-growth companies?”
Founded 2018 as Brazil's first banking API, Stark Bank positioned itself from day one as a developer-first challenger bank for high-growth startups and enterprises. Rather than a consumer neobank, it built REST APIs for Pix, boleto, TED, cards, and payables — becoming banking infrastructure for companies like QuintoAndar, Loft, and Bitso. The 2026 launch of ARC signals a shift toward agentic AI as the interface layer for corporate banking.
Stark Bank discloses Stark Bank S.A. (in-house) as its banking provider, according to the Embedded Finance Index 2026.
Stark Bank does not disclose a bank charter of its own; its banking services are provided through Stark Bank S.A. (in-house).
Stark Bank processes payments through Stark Bank (self-operated). Disclosed money-movement rails: Pix.
Stark Bank's cards are issued through Stark Bank S.A. (in-house).
Stark Bank's lending and capital products are provided by Stark Bank (in-house).
Stark Bank's crypto products run on Stark Bank (in-house).
Stark Bank's investing and wealth products are powered by Stark Bank (in-house).
The Embedded Finance Index 2026 maps 8 layers in Stark Bank's stack: Payments / PSP (Stark Bank (self-operated)); Money movement (Pix); Banking / BaaS (Stark Bank S.A. (in-house)); Card issuing (Stark Bank S.A. (in-house)); Lending (Stark Bank (in-house)); Crypto (Stark Bank (in-house)); Investing (Stark Bank (in-house)); Spend / AP (Stark Bank Corporate Card (in-house)).
Stark Bank was founded by Rafael Stark and is founded in 2018, headquartered in São Paulo, Brazil.
Stark Bank has raised $60.1M in total (latest round: Series A, 2021).
Get a read on where your own stack stands against Stark Bank and the rest of its category — what they built versus bought, which providers they use, and where the gaps in your own strategy and competitive set actually are.