Flexprice raises $500,000 in funding to power open-source billing for the AI-first economy

Flexprice, the open-source billing and metering platform built for AI and Agentic companies, has raised $500,000 in a pre-seed funding round led by early-stage VC firm TDV Partners. 

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The round also saw participation from seasoned operators and angel investors from Brij Bhushan (Co-founder of magicpin), Gunjan Patidar, Ram Singla and Pradyot Ghate (Zomato), Sandeep Gupta (Co-founder of Innovaccer), Akash Singh (ex-Co-founder of Observe.AI), and Harshit Dwivedi (Founder of Aftershoot). 

With the new funding, Flexprice will expand its engineering team, accelerate integrations with popular payment gateways, and deepen its open-source offerings as it builds the modern billing stack for AI and Agentic companies.

Offering developers a modular billing layer

The AI boom is fundamentally reshaping monetization strategies. Over two thirds of SaaS companies are now launching or integrating GenAI features, dramatically increasing infrastructure costs and altering customer value perception. To adapt, a majority of SaaS and API-first businesses are shifting away from static subscriptions in favor of usage-based or hybrid billing models that better align pricing with actual customer usage. 

However, legacy billing tools, built for a predictable, seat-based SaaS world, struggle to meet the demands of today’s dynamic, metered AI and API-first business models.

As a result, engineering teams end up spending months building and maintaining complex infrastructure for metering, entitlement gating, usage aggregation, and billing logic, creating costly bottlenecks and diverting resources away from core product development. 

Founded in 2025, Flexprice aims to address these challenges by offering developers a modular billing layer that helps launch and scale usage-based, hybrid, or custom pricing without needing them to reinvent the wheel.

With its plug-and-play architecture, the platform integrates directly with popular payment providers like Stripe, Adyen and Razorpay, helping teams skip months of engineering effort and eliminate vendor lock-in.

“Today’s AI and Agentic teams need to move fast as the competition on product distribution goes up, ability to move fast with pricing and scalable billing plays a critical role. Flexprice is built to ensure pricing, packaging and billing are never a bottleneck,” said Manish Choudhary, CEO of Flexprice. “We built Flexprice to give developers control, flexibility, and peace of mind.”

Key features

Flexprice is built on an open-source, self-hostable architecture that provides transparency and control. It offers developer-first APIs and SDKs for real-time usage tracking, event instrumentation, and quota gating. The platform supports multiple pricing models, including pay-as-you-go, credits, seats, or volume tiers.

It features real-time analytics dashboards and invoice visibility for both customers and internal teams. Its composable design allows it to function either as a metering layer or a complete billing engine.

The total addressable market (TAM) for modern AI billing infrastructure is estimated at $4 billion, growing at 20% CAGR, driven by the rise of generative AI, API platforms, and real-time analytics. Flexprice said it is targeting both the 70,000+ “AI-native” startups worldwide and large enterprises to evolve their AI monetisation models. 

“We believe open infrastructure is the future,” said Nikhil Mishra, CTO of Flexprice. “Our goal is to make modern billing accessible, composable, and cost-effective - whether you’re an early-stage AI startup or a scaling business.” 

“We believe Flexprice is solving a fundamental infrastructure gap in the monetization stack for AI and Agentic companies,” said Ujwal Sutaria, General Partner at TDV Partners. “The team’s open-source-first approach, deep developer empathy, and modular product vision give them a unique edge in a rapidly expanding market.”