“Can a cloud-native, modular core banking platform become the default infrastructure layer for banks and BaaS providers across Europe?”
Tuum (operating as Modular Technologies OÜ) was built from inception as a cloud-native, API-first, microservices-based core banking platform — a direct competitor to legacy core banking vendors. Rather than building a fintech product itself, Tuum positioned as infrastructure: enabling banks, EMIs, and brands to rapidly launch accounts, payments, lending, and card programmes without replacing entire legacy stacks. Its marquee customer LHV Bank — which itself powers 200+ fintechs — validated Tuum's BaaS-infrastructure thesis. The company has expanded beyond a pure core banking play by pre-integrating with card issuers (Marqeta), open banking compliance (Salt Edge), and payment settlement rails (Currencycloud, Banking Circle, Centrolink, LHV).
Tuum's cards are issued through Marqeta.
Tuum uses Veriff for KYC and identity verification.
Tuum connects to bank accounts through Salt Edge.
Tuum uses Currencycloud and Banking Circle for FX and cross-border payouts.
The Embedded Finance Index 2026 maps 5 layers in Tuum's stack: Card issuing (Marqeta); Lending (Personal loans, BNPL / point-of-sale financing, SME working capital loans, Invoice financing and 4 others); Open banking (Salt Edge); KYC (Veriff); FX & payouts (Currencycloud and Banking Circle).
Tuum is headquartered in Tallinn, Estonia.
Get a read on where your own stack stands against Tuum 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.