The archive · Money & Fintech · Technical decision · 2024–2026
Lerian bets an open-source ledger can replace proprietary bank cores; R$30M seed
Brazil's Lerian builds Midaz, an open-source banking ledger; R$30M (~US$5.7M) seed led by MAYA Capital in January 2026.
Lerian
What the business is
Open-source financial infrastructure: Midaz ledger plus modular compliance, risk, reconciliation and regulatory-reporting tools for fintechs and banks.
Starting capital：R$30M (~US$5.7M) seed led by MAYA Capital (Jan 2026); R$18M first round (Nov 2024)
How it started
Fred Amaral, who co-founded Brazilian payments company Dock, founded Lerian in 2024 with two ex-Dock colleagues. His bet: banking software should be open like infrastructure, not locked into vendors — the core ledger is a commodity, and value sits in the compliance, risk and reporting layers around it.
What happened
Lerian built Midaz as an open-source, cloud-native ledger and added Flowker (onboarding and compliance orchestration), Tracer (real-time transaction risk), Reporter (regulatory reporting) and Matcher (reconciliation). In January 2026 it raised R$30M (~US$5.7M) in an oversubscribed seed led by MAYA Capital, with Norte Ventures, Supera Capital, Crivo Ventures, Blustone and Accel partner Kevin Efrusy — an early backer of Pismo, a competitor Visa later acquired. The company served 14 clients and aimed to double that in 2026.
How it ended up
Still running: scaling in Brazil with 14 clients, preparing expansion into Latin America and the US.
Background
Lerian is a Brazilian startup building open-source financial infrastructure, founded in 2024 by Fred Amaral — who previously co-founded payments company Dock — with two ex-Dock colleagues. The bet is architectural: the transaction ledger at the center of banking should be open source, letting any fintech run, audit and customize it, instead of being locked into a proprietary core vendor.
The anchor product is Midaz, an open-source, cloud-native ledger, surrounded by modular tools: Flowker for onboarding and compliance orchestration, Tracer for real-time transaction risk, Reporter for regulatory reporting and Matcher for reconciliation. Lerian's model gives the basic infrastructure away free and charges for premium plugins and services — the Red Hat play aimed at Brazil's dense fintech and digital-banking market.
In January 2026 Lerian raised R$30M (~US$5.7M) in an oversubscribed seed round led by MAYA Capital, with Norte Ventures, Supera Capital, Crivo Ventures, Blustone and Accel partner Kevin Efrusy — an early backer of Pismo, a competitor later acquired by Visa. The company said it served 14 clients and planned to double that number in 2026, with funds earmarked for AI features, commercial and customer-success teams, and the start of international expansion.
What has to be true
- Proprietary banking cores lock clients into vendors and slow fintech launches; an auditable open ledger removes that dependency.
- Brazil has one of the world's densest fintech ecosystems and an active open-banking regime, so infrastructure demand is structural.
- Charging for premium modules means the core can be free — lowering buyer risk and accelerating adoption.
- Founders with Dock pedigree plus Accel partner Kevin Efrusy, an early Pismo backer, gave the round instant credibility.
What can be applied
Open-source as a wedge: Lerian gives away the ledger to break vendor lock-in, then sells the compliance and risk modules banks actually pay for — the Red Hat play applied to banking cores.
Aftermath
As of January 2026 Lerian was live with 14 clients in Brazil and aimed to double that during the year, using the R$30M seed for AI integration across its platform, commercial and customer-success teams, and marketing. Over the medium term (24–36 months) it planned to enter other Latin American markets and the United States. Revenue and profitability were not disclosed, and the open-source-ledger thesis remains unproven against incumbents like Pismo — but the funding from MAYA Capital and Accel's Kevin Efrusy signaled institutional belief in open-source core banking.
Sources
- Lerian raises $5.7M seed round
- Brazilian Fintech Lerian Raises $5.6 Million Seed Round
- Lerian capta R$ 30 mi com Maya Capital
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