Flexprice announced a $1.5M seed funding round led by Shastra VC, co-led by Anupam 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 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.
“If billing doesn't work, we don't make money. Flexprice lets us focus on the core business instead of building billing as a second product." — Shubhendu Shishir, Head of Engineering, Simplismart, an AI infrastructure SaaS platform.
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.
Founded for the AI Economy
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.
“In our conversations with AI companies, one theme came up repeatedly: traditional billing systems are breaking under new AI business models. Software pricing is rapidly shifting from seat-based subscriptions to usage-based and increasingly outcome-based pricing, creating a level of complexity most existing infrastructure wasn’t designed to handle. What stood out about Flexprice was the strength of the engineering vision - an open-source, real-time billing platform purpose-built for modern AI products, while integrating cleanly into existing systems. The early traction reinforced how urgent and universal this need is. We invested because we believe Flexprice is building foundational infrastructure for the next generation of AI-native software companies.” —Avijeet Alagathi, Managing Partner, Shastra VC
The platform currently offers:
• Open-source, self-hostable architecture built in Go, with ClickHouse for high-throughput metering, Kafka for event-driven pipelines, and Temporal for workflow orchestration
• Real-time ingestion pipeline handling 20B+ events/month at sub-second latency
• Support for any pricing model: pay-as-you-go, prepaid credits, volume tiers, seats, hybrid, and (coming soon) outcome-based pricing
• Developer-first APIs and SDKs for real-time usage tracking, event instrumentation, and quota gating
• Native integrations with Stripe, Adyen, and Razorpay
• Real-time analytics dashboards and invoice visibility for customers and internal teams
"Billing is the hardest layer to get right, and the most consequential when you get it wrong, so that's where we started. But billing is just the foundation of a much larger stack that every software company runs on. The bigger picture is full revenue automation: from the first usage event to the last dollar recognized, giving AI companies the infrastructure to experiment, iterate, and scale their monetization in real time without being held back by systems that were never built for them," said Manish Choudhary, CEO, Flexprice.
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-in, something no closed-source billing platform can offer.A $4B Market Ripe for Disruption
The market for modern AI billing infrastructure is estimated at $4 billion and growing at a 20% CAGR. The broader SaaS billing market is projected to reach $20.3 billion by 2033. Flexprice is positioned to serve both the growing base of 70,000+ AI-native startups globally and large enterprises evolving their monetization strategies for AI.
“We’re seeing a generational shift in how software is priced and delivered, driven by AI and usage-based models. Flexprice is building the foundational infrastructure required for this new paradigm. Their open-source approach, combined with deep technical execution and a clear product vision, positions them to become a category-defining company in the revenue stack.” — Ujwal Sutaria, General Partner, TDV Partners.
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