Raised $23M Series A (Feb 2026) led by Lightspeed with General Catalyst and EQT Ventures. 30 enterprise clients including Pleo and Cleo. 100,000+ finance hours saved annually.
Stacks deploys deterministic ML agents to automate the month-end financial close process — reconciliations, journal entries, variance analysis, and financial flux analysis — targeting the accounting bottleneck that consumes days of finance team time every month at every company. The company raised $23 million in Series A financing in February 2026, led by Lightspeed Venture Partners with General Catalyst and EQT Ventures as co-investors. Enterprise clients include Pleo and Cleo, and the platform claims 100,000+ finance hours saved annually across its customer base.
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