Gradium AI builds Text-to-Speech, Speech-to-Text, and voice cloning models for use cases like real-time customer support and live gaming interactions and robotics. Less than a year after raising $100 million thanks to NVIDIA's investment, the French startup integrated Stripe in just one week, ahead of its December 2025 launch.
Gradium chose Stripe Billing, Payments, Invoicing, and Tax to support its fast-changing billing and payment needs as it scaled.
“With ambitious plans for our growth, we knew we’d need a partner that could scale with us. Stripe was the clear choice for financial infrastructure we can rely on as we grow into new markets,” said Olivier Teboul, CTO at Gradium AI.
Flexible tools for varied pricing models
Gradium serves a range of customers, from individual developers and start-ups to scale-ups and enterprises, with products including Gradium Translate, a real-time translation API, and Phonon, an offline, on-device text-to-speech model. To meet a wide range of customer needs, Gradium offers tiered pricing plans based on usage. Customers can choose monthly or annual plans based on the number of hours of speech generation they need, while enterprise customers can contract for unlimited plans and on-premises deployments.
For accounts receivable, Gradium uses Invoicing to quickly create and send invoices to enterprise customers. The team can easily generate a custom payment page with a payment link, then share it with the customer via email or SMS.
A partner for growth
Gradium AI may be rooted in France, but it has an international customer base. To fuel this growth, the company relies on Stripe’s robust international infrastructure to operate smoothly across markets.
To improve conversion, Gradium uses Stripe Adaptive Pricing to display prices in customers’ local currency. With Stripe Checkout, Gradium offers a streamlined checkout experience that accommodates five payment methods. Currently, customers can pay using cards, Apple Pay, Google Pay, and SEPA Direct Debit, and Gradium can add more payment methods as the business scales. The company also relies on Tax to automate tax compliance, allowing its team to stay focused on growth and product strategy rather than manual tax and accounting work.
It’s important to keep rapidly evolving our pricing and business model along with our customers’ needs. Stripe gives us the flexibility to focus on the strategy behind that growth.
