The software that tracks, moves, and reconciles money between systems has become the defining infrastructure challenge for fintech companies — and an increasingly crowded category of startups is racing to own it. Companies like Modern Treasury and Formance have raised hundreds of millions collectively to replace the spreadsheets, custom-built ledgers, and manual bank portal logins that still power most payment operations. For fintech founders and product teams evaluating this space, understanding who does what — and which players get overlooked — is essential.

This category sits at the intersection of payment operations, programmable ledgers, and financial data infrastructure. Analysts at Flagship Advisory Partners formalized the term "Ledger-as-a-Service" (LaaS) in a landmark July 2025 report. VCs like a16z call it "financial infrastructure," Bain Capital Ventures prefers "money movement infrastructure," and Modern Treasury coined "payment operations" as a category unto itself. The truth is that no single label captures the full scope. What unites these companies is a shared conviction: tracking money accurately in real time is a problem too critical and too complex to keep solving in-house.

Why every fintech eventually hits the ledger wall

The origin story is remarkably consistent across the space. Modern Treasury's founders built a mortgage marketplace at LendingHome that scaled to $300M+ in sales — then watched their accounting team print bank statements and manually match transactions line by line. They visited Airbnb, Uber, Coinbase, and Gusto and found each had built 200-person payments engineering teams solving identical problems internally. Dimitri Dadiomov describes it as "rage founding."

Formance's CTO Clément Salaün frames the cost differently: "If you get three SaaS products to manage those, you're going to spend $150,000 on the three products and $150,000 on internal glue to link them together." Most fintechs start tracking money in Excel, graduate to repurposing their general ledger, then eventually face a reckoning when reconciliation breaks, auditors ask questions, or a regulatory filing deadline looms.

The Synapse collapse in 2024 made this viscerally real. Gaps in ledgering contributed to millions of dollars in unreconciled customer funds — a cautionary tale that accelerated demand for purpose-built ledger infrastructure. The shift from "build" to "buy" is now unmistakable. The strategic question has shifted from "can we build this?" to "what are we not doing while we build it?"

For a practical breakdown of what this looks like at the integration layer, see our complete guide to accounting API integrations for fintech.

The two anchors: Modern Treasury and Formance compared

Modern Treasury and Formance represent two fundamentally different philosophies for solving the same problem. Understanding their differences reveals the fault lines across the entire category.

Modern Treasury is the market leader — a proprietary, full-stack payment operations platform valued at $2B with $183M raised across its Series C. Founded in 2018 in San Francisco, it connects directly to 40+ banks and actually moves money across ACH, wire, RTP, FedNow, push-to-card, and (since acquiring Beam for $40M in October 2025) stablecoins. Its proprietary ledger has powered $400B+ in total payments. The platform serves both developers (via API) and finance teams (via dashboard), and includes built-in KYC, KYB, AML, and transaction monitoring. Customers include Gusto, Robinhood, ClassPass, GoFundMe, Navan, and Procore — a roster spanning marketplaces, payroll, lending, healthcare, and crypto.

Formance takes the opposite approach. It is an open-source programmable ledger — MIT-licensed, self-hostable on Kubernetes, and built around Numscript, a purpose-built domain-specific language for modeling money movements. Founded in 2021 in France, the company raised a $21M Series A in January 2025 co-led by PayPal Ventures and Portage Ventures, with Y Combinator participation. Formance does not process payments or hold money. Instead, it acts as vendor-agnostic middleware: a core ledger that connects to any payment rail (Stripe, Adyen, Banking Circle, Modulr) through connectors. Named customers include Doctolib, Liberis, and Booksy, with roughly 20 customers as of early 2025 and 10x revenue growth over the prior 12 months.

The philosophical divide is stark. Modern Treasury owns the full pipeline including compliance and bank connectivity. Formance gives away the core engine and lets customers deploy to their own infrastructure. Modern Treasury says "we'll move your money and keep the books." Formance says "we'll give you the tools to keep the books yourself — wherever and however you want."

The full competitive landscape, mapped by layer

The space is far more crowded than most category maps suggest. Players cluster into distinct layers.

Direct ledger-as-a-service providers

Fragment ($10.8M raised, Seed stage) offers a GraphQL-based ledger API with a visual fund flow designer. Backed by Stripe, with angels from Plaid, Coinbase, and Uber, Fragment positions itself as a "database for money." Customers include Pleo, NALA, and TruckSmarter.

TigerBeetle ($30.5M raised, Series A at ~$100M valuation) operates at a lower layer — a purpose-built, open-source financial transactions database claiming 1,000x throughput versus general-purpose databases. Production customers process 100M+ transactions monthly.

Twisp (~$3M raised, Pre-Seed) is a cloud-native ledger database founded by the principal engineer behind Simple, the first neobank. Blnk Finance offers another open-source alternative with multicurrency support from day one.

Then there is Stripe's own Ledger product, deeply integrated with Stripe's payment infrastructure — perhaps the single largest competitive threat to standalone ledger companies for companies already in the Stripe ecosystem.

Full-stack money movement platforms

Moov ($109M raised, backed by a16z, Bain Capital Ventures, and Visa) is the closest full-stack competitor to Modern Treasury. Column may be the most disruptive force in the space — a nationally chartered bank built from scratch by Plaid co-founder William Hockey. Column IS the bank and the technology, eliminating the middleware layer entirely. It posted $55.1M in revenue in 2024 (up 126% YoY) and powers Mercury, Brex, Bilt, and Wise. Increase takes a "bare metal" approach with direct Federal Reserve connections, offering unfiltered access to FedACH, Fedwire, FedNow, and Visa networks.

Payment orchestration — the layer above

Spreedly ($83M raised, founded 2007) is the elder statesman with 1B+ secured payment methods in its vault. Primer ($74M raised, London) differentiates with a no-code workflow builder. Payrails ($53M raised, Berlin, backed by a16z and General Catalyst) targets high-volume global enterprises. Gr4vy ($27M raised) uniquely spins up dedicated cloud instances per merchant.

Payment facilitation as a service

Finix ($210M raised) became a full processor and expanded into no-code tools. Payabli ($60M raised, 7x YoY revenue growth) covers Pay In, Pay Out, and Pay Ops. Tilled ($11M raised) pioneered PayFac-as-a-Service with a 66% revenue share model. WePay (Chase) discontinued its services in 2024, creating openings across this sub-segment.

Treasury and cash management APIs

Kyriba (PE-backed at ~$1.3B, connected to 9,900+ banks) dominates large enterprises. Trovata ($80M raised, backed by J.P. Morgan and Wells Fargo) is the modern cloud-native challenger. Atlar (~€14M raised, founded by Tink alumni in Stockholm) is the European analog to Modern Treasury, targeting finance teams rather than engineers. Treasury Prime ($72M raised) provides the BaaS layer connecting fintechs to a network of 15+ banks.

For a deeper look at how banks are connecting treasury and cash management to accounting systems, see our analysis of accounting and ERP integration for banks.

Embedded accounting infrastructure — the often-missed adjacent layer

Teal ($8M Seed, founded by the ex-CEO of Bench Accounting) lets platforms go live with embedded bookkeeping and tax filing in four weeks. Tight and Open Ledger offer similar white-label accounting APIs — operating at a higher abstraction layer than LaaS, focused on P&L statements and tax compliance rather than raw transaction tracking.

Newer and lesser-known players worth watching

• Navro ($41M Series B, London) — Cross-border "payments curation" covering payouts in 200+ countries
• Rainforest ($28.5M raised) — Payments-as-a-service for SaaS companies, with 17x payment volume acceleration
• JustiFi ($10M raised) — Embedded fintech unifying card-present, card-not-present, insurance, and BNPL for vertical SaaS
• Numeral (€13M raised, acquired by Mambu in December 2024) — European payment automation for SEPA, Bacs, and FPS
• Yuno — Latin America-focused payment orchestration with AI-powered routing
• Juspay — India-origin open-source payment orchestration expanding globally
• MoneyHash — Payment orchestration focused on the MENA region

Five use cases reshaping the category

Embedded finance at scale. The embedded finance market reached an estimated $104–148 billion in 2024–2025 and is projected to hit $588B–$1.7T by the early 2030s. Every vertical SaaS platform considering embedded payments faces the same build-vs-buy decision that created this category. For a searchable directory of 100+ embedded finance platforms and providers by category, see the Embedded Finance Directory on Open Banking Tracker. Our fintech API guide for startups covers the key integration trade-offs at each layer.

Real-time payments going mainstream. FedNow now reaches 1,600+ financial institutions. It processed $245 billion in Q2 2025 alone, up 49,000% year-over-year. RTP processed $1.3 trillion in 2025. Real-time settlement creates real-time reconciliation problems. Fintechs pushing live bank transaction data into accounting systems in real time are moving to bank feeds APIs to close this gap.

Stablecoin rails entering traditional finance. Modern Treasury's $40M acquisition of Beam in October 2025 and its Paxos partnership signal that stablecoin settlement is becoming a legitimate payment rail. Companies need ledger infrastructure that handles both fiat and digital assets natively.

Marketplace complexity compounding. Multi-sided platforms splitting payments across sellers, service providers, tax jurisdictions, and escrow accounts generate reconciliation complexity that grows exponentially with scale.

AI transforming financial operations. Modern Treasury launched an AI-powered payment operations platform in May 2025. The AI in fintech market is projected to grow from $30B in 2025 to $83.1B by 2030, with agentic AI emerging as the next frontier.

Where the category goes from here

The convergence of ledger, payments, and banking infrastructure is accelerating. Modern Treasury started as payment operations and added ledgers, then stablecoins. Formance started as a ledger and added connectivity and orchestration. Column eliminated the middleware layer entirely. The winners will span enough of the stack to eliminate integration overhead without trying to do everything poorly.

The open-source vs. proprietary debate mirrors the broader infrastructure software playbook. Formance, TigerBeetle, Blnk, and Moov all bet that open-source community building drives adoption faster. Modern Treasury and Fragment counter that proprietary systems proven at $400B+ in payments volume carry less risk for regulated operations.

Consolidation is already underway. ProcessOut was acquired by Checkout.com. Numeral was acquired by Mambu. Modern Treasury acquired Beam. WePay shut down. Expect standalone LaaS providers to either grow into full platforms or get absorbed into larger payment infrastructure plays.

Global fintech investment rebounded to $116 billion across 4,719 deals in 2025, with PE/VC fintech investment up 43.7% year-over-year. The capital is flowing specifically toward B2B infrastructure and away from consumer-facing apps.

Conclusion

The ledger and payment operations infrastructure category is no longer a niche concern for payments engineers — it is becoming the foundational layer that determines how fast fintech companies can ship, how accurately they can reconcile, and how confidently they can face regulators. The competitive landscape spans at least five distinct sub-layers, from low-level transaction databases (TigerBeetle) through programmable ledgers (Formance, Fragment) to full-stack payment operations (Modern Treasury, Moov) and vertically integrated bank-tech platforms (Column). The companies most often overlooked — Atlar in European treasury automation, Navro in cross-border payments curation, Teal in embedded accounting, and Blnk in open-source ledgers — represent the long tail of specialization that makes this market far deeper than any single category label suggests.

For fintech founders, the core strategic question is no longer whether to buy ledger infrastructure, but which layer of the stack to own versus outsource — and how quickly the platform they choose today will converge with the adjacent layers they will need tomorrow.