Flexprice, the open-source usage billing infrastructure built for AI-native and API-first enterprises, today announced a $1.5M seed funding round led by Shastra VC, co-led byAnupam Mittal, founder of People Group and one of India's most prominent entrepreneurs and TDV Partners, who doubled down on their initial investment in the company. Following Flexprice’s initial funding round in July 2025, which was focused on expanding the engineering team, accelerating integrations with leading payment gateways, and deepening its open-source ecosystem, the company has now entered its strongest growth phase to date. Flexprice grew 6X in revenue last quarter, while event processing volume scaled 20x over the past year to more than 20 billion events per month. Today, its infrastructure powers usage-based billing for some of the fastest-growing AI companies globally, processing real-time data across token consumption, API calls, GPU hours, and hybrid pricing models at enterprise scale. Building on this momentum, the new funding will support two priorities: accelerating global expansion across the US and Europe, building new product surfaces that extend Flexprice beyond billing into AI-native finance. Covering metering, revenue recognition, and financial reporting through AI workflows. The funding marks a significant step in the company's journey to redefine how software companies manage and automate their revenue infrastructure. AI companies today deliver value by the token, the API call, and the second, but the billing systems they rely on were built for flat-rate subscriptions from a different era. That mismatch is no longer just a technical inconvenience. Revenue infrastructure accounts for roughly 7-10% of COGS, one of the largest cost centres in software businesses. Yet it has seen the least innovation of any layer in the stack. The AI boom has made this acute. Companies launching AI-powered products face dramatically higher infrastructure costs, usage patterns that change week to week, and customers who expect pricing that reflects actual value, not a flat monthly fee. Most billing systems simply weren't built for this reality. Flexprice, founded in late 2024 and headquartered in New Delhi, with teams across San Francisco and Bengaluru, was designed from the ground up for this reality. The platform handles real-time usage ingestion, complex entitlement management, and continuously evolving pricing logic without forcing companies into rigid workflows or opaque systems. Built in Go with ClickHouse for high-throughput metering, Kafka for event-driven pipelines, and Temporal for workflow orchestration, it is infrastructure-grade by design, capable of handling the volume and precision that enterprise AI workloads demand. With 3 API integrations, companies can deploy a complete billing and metering system and go live without rebuilding their data pipelines. Flexprice is fully open-source and self-hostable. Companies get enterprise depth with zero vendor lock-i
