Flexprice Raises $1.5M Seed Round Led by Shastra VC, with participation from TDV Partners and Anupam Mittal

After its first funding round in July 2025, Flexprice used the money to expand its engineering team, improve integrations with payment gateways and strengthen its open-source platform. Since then, the company has grown rapidly, with revenue increasing 6X last quarter and event processing volume growing 20X over the past year to more than 20 billion events every month.

Today, Flexprice helps fast-growing AI companies manage usage-based billing by processing real-time data such as token usage, API calls, GPU hours, and different 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 charge customers based on usage, such as the number of tokens used, API calls made, or time spent using a service. However, many billing systems were originally designed for simple monthly subscription plans and are not suitable for modern AI businesses.

This gap has become a major problem. Billing and revenue systems make up around 7–10% of software companies’ operating costs, but this area has seen very little innovation over the years. With the rapid growth of AI, companies now face higher infrastructure costs, constantly changing usage patterns, and customer demand for flexible pricing based on actual usage instead of fixed monthly fees. Most traditional billing systems are not built to handle these new requirements.

“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.

Flexprice is built using technologies like Go, ClickHouse, Kafka, and Temporal to handle large amounts of billing and usage data for AI companies. The platform is designed to support the high speed and accuracy needed for enterprise AI workloads.

With just three API integrations, companies can quickly set up a complete billing and metering system without rebuilding their existing data pipelines. Flexprice is also fully open-source and self-hostable, giving businesses more flexibility and avoiding dependence on a single vendor.

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.

Flexprice is an open-source billing and metering platform built for modern AI and agentic companies. It helps businesses create real-time and usage-based pricing systems with flexible tools, full transparency, and no vendor lock-in.

Founded in 2025 and based in Bengaluru, Flexprice aims to build an AI-native revenue platform for businesses. The company also supports integrations with popular payment providers such as Stripe, Adyen, and Razorpay, helping companies avoid dependence on a single payment provider.

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