End Close

End Close

AI powered reconciliation for high-volume payments companies

Winter 2026ActiveB2BFinance and AccountingFintechSaaSPaymentsB2BAISan Francisco, CA, USA
Company
https://endclose.com
End Close builds automatic reconciliation for payments companies like fintechs, marketplaces, banks and payroll companies. Reconciliation helps companies track every dollar and resolve every exception, ensuring they have no money loss, can report audit ready financials, and stay compliant. Sean (CEO) spent the last 6 years building the reconciliation org at Modern Treasury (S18), processing a trillion dollars in payments across 40 banks with 99.995% automation. Fast growing companies like Modern Treasury are forced to build a solution in-house or buy a legacy solution. End Close provides a modern reconciliation system that works with a company's existing stack and is managed by AI agents. Exception handling is where 99% of the manual work happens today, payment ops teams spend hours gathering context across various data sources to investigate each ticket. End Close provides an AI ops agent that connects to a company's data warehouse, invoicing platform and payment processors to triage and resolve issues without human intervention. Legacy providers only provide reconciliation for month end close applications. End Close continuously reconciles with developer friendly APIs, allowing teams to integrate real time payments data within their products to create product experiences for customers like faster balance top-ups, instant trading etc. New payment rails and agent-to-agent payments are increasing online transaction volumes, making reconciliation a growing challenge for companies. David (CTO and 2nd time YC founder) most recently built these kinds of high-scale ingestion pipelines when starting and leading error tracking at PostHog (W20), the fastest growing product in the company's history.

Verdict

High Signal
Market Opportunity
Target ICP is high-volume payments companies: fintechs, marketplaces, banks, payroll companies — large B2B enterprise buyers with clear pain. Reconciliation is a mandatory compliance and operational function, not discretionary spend. Growing transaction volumes from new payment rails and agentic AI payments make this a structurally expanding market. Legacy players (Oracle, SAP, Adra) are entrenched but poorly suited for modern stack companies.
High Signal
Founder Signal
Sean Bolton spent 6 years at Modern Treasury (S18) as engineering manager and software engineer, scaling reconciliation to $350B annual payments volume and $1T reconciliation volume — this is direct domain expertise at the exact problem being solved. David Newell is a 2nd-time YC founder (Unflow S19), previously product engineer at PostHog (W20) where he led error tracking to become PostHog's fastest-growing product, and earlier at Intercom and Basecamp. Both are University of Galway BEng grads with strong engineering fundamentals. Exceptional founder-market fit.
Medium Signal
Competition
No competitor data was returned in research, but the space has legacy players like Adra (Trintech), BlackLine, and ReconArt, plus niche fintech tools like Numeric. End Close differentiates via continuous (vs. month-end) reconciliation, developer-first APIs, and AI-driven exception handling — positioning against both legacy enterprise software and in-house builds. The risk is that well-funded incumbents modernize or that Modern Treasury (Sean's former employer) expands their reconciliation product.
Medium Signal
Product
Product has a live website with docs, detailed feature descriptions, API examples, a rules engine UI mockup, and AI agent workflow illustrations. Claims 99.9% automation with a deterministic rules engine and continuous reconciliation. However, no named customer logos, no revenue/usage metrics, and no live demo — just 'Book a demo' CTAs. Product appears functional but unproven publicly.
OverallA Tier

End Close has one of the strongest founder-market fit combinations in the batch: Sean Bolton spent 6 years building exactly this product at Modern Treasury at trillion-dollar scale, and David Newell brings a prior YC company, PostHog experience, and real engineering depth. The problem is real, compliance-driven, and non-discretionary for payments companies. The main risks are that no public customers or revenue are visible yet, Modern Treasury itself could compete, and the sales cycle into fintech ops/engineering teams can be slow. If they can land 2-3 logos fast, this could be a strong A or S.

Active Founders

Sean Bolton
Sean Bolton
Founder

Sean is the co-founder and CEO of End Close. Sean was the third hire at Modern Treasury (S18) where he spent 6 years as the tech lead of payments engineering before building and running the reconciliation org. While there he scaled the product to $350B in annual payments volume and $1T in annual reconciliation volume with 99.995% automation.

David Newell
David Newell
Founder

David is the co-founder and CTO of End Close. Before End Close, David was the team lead at PostHog (W20) for the error tracking product which became the fastest growing in the companies history. David previously founded Unflow (S19) and has worked as a product engineer at Intercom and Basecamp.

End Close
End Close
TierA Tier
BatchWinter 2026
Team Size2
StatusActive
LocationSan Francisco, CA, USA