Rexi, an AI-native financial operations startup building automation infrastructure for reconciliation across fintechs, banks, and payment companies, has raised $1.2 million in a pre-seed funding round as it looks to scale its platform and expand its presence across the United States and Latin America.

The round was led by Underscore VC, with participation from Flybridge Capital Partners, Pear VC, NFX, Textbook Ventures, and Carao Ventures. These investors are backing Rexi’s vision of transforming back-office financial operations through an AI-driven reconciliation layer designed to unify fragmented transaction data across modern financial systems.

Founded in 2025 by Ignacio Berardi (CEO), Sebastián García (CTO), and Teo Zavalia, Rexi is building what it describes as an “AI-first operational infrastructure” for companies that move money. The platform connects directly to systems such as payment processors, banks, and enterprise resource planning tools, then automates the reconciliation of transactions using AI agents that detect, explain, and resolve discrepancies in financial records.

The company operates in a space where finance teams traditionally rely on spreadsheets, manual workflows, and engineering-heavy data pipelines to ensure that payments, ledger entries, and bank records align. Rexi aims to replace these brittle systems with a self-serve, AI-native platform that continuously reconciles financial data in real time and provides a single source of truth across all connected systems.

Investors such as NFX and Pear VC have supported Rexi due to its focus on a critical but often overlooked layer of fintech infrastructure: reconciliation and financial data integrity. By targeting operational inefficiencies in back-office workflows, the company is addressing what it describes as one of the most persistent bottlenecks in scaling digital financial services.

Rexi’s platform integrates with major financial tools and systems, including payment processors, banking APIs, and accounting software. Once connected, it ingests raw transactional data, normalizes it, and applies AI-driven matching logic to detect inconsistencies such as missing entries, duplicate transactions, or settlement mismatches. These exceptions are then surfaced to finance teams with clear explanations and suggested resolutions.

The startup has positioned itself as a next-generation alternative to legacy reconciliation tools by emphasizing speed of integration and automation depth. Unlike traditional systems that require heavy configuration or engineering support, Rexi is designed to be deployed quickly and operated directly by finance and operations teams without extensive technical overhead.

According to publicly available product information, Rexi already serves companies operating in high-volume financial environments, including fintech platforms, neobanks, and payment processors. Its system is designed to handle complex transaction flows across multiple providers while maintaining auditability and compliance standards required by regulated financial institutions.

The funding will be used to expand Rexi’s engineering and product teams, accelerate development of its AI reconciliation engine, and scale commercial operations in key markets. A major focus will also be improving the platform’s ability to learn organization-specific reconciliation rules, allowing it to adapt dynamically to different financial systems and operational environments.

The company’s broader mission is to reduce operational risk in financial infrastructure by ensuring that every transaction can be traced, verified, and reconciled in real time. This is particularly relevant in an environment where fintech stacks are increasingly modular, with companies relying on multiple third-party providers for payments, banking, and ledger infrastructure.

By combining AI agents with deep financial system integrations, Rexi is positioning itself as an “operational layer” for modern finance teams, aiming to replace fragmented reconciliation processes with a unified system of financial truth.

With $1.2 million in pre-seed funding led by Underscore VC and supported by Flybridge, Pear VC, NFX, Textbook Ventures, and Carao Ventures, Rexi is now focused on scaling its platform and establishing itself as a foundational infrastructure provider in the evolving fintech ecosystem.

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