AI platform for global indirect tax
One data model across the full indirect tax lifecycle. Humans decide, AI handles the execution. The system does the work. You make the calls.
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A new operating system, built for autonomous tax
Regulatory updates, tax determination, e-invoicing, and tax filings, all in one platform. Automated end-to-end through pre-built workflow agents. Meet the Fonoa Tax Operating System.
Modular Tax Infrastructure
Validate · Tax Engine · E-invoicing · Returns. Modular solutions, one API.
One data model. Each one works on its own. Together, they follow the transaction from validation to filing without middleware or reconciliation
AI Workflows
Knowledge · Agent · Audit
Stay on top of global regulations. Let AI orchestrate the compliance lifecycle. Humans supervise and approve. Every decision and action is traceable with AI Audit.
Four solutions. Every indirect tax obligation. One platform.
Global tax ID validation
Real-time, 120+ countries, search by name, fuzzy matching.
Fast tax determination
VAT, GST, Sales Tax across 100+ jurisdictions. Sub-200ms. API-first, configurable without engineering escalation.
Unified e-invoicing API
One standard model across all mandates. Accredited government connections. Ultra-low rejection rates.
Automated return filing
Multi-country. Full lineage from return box to source transaction. Native e-invoicing connection.
AI that acts on the direction you set
Intelligence: Global tax legislation at your fingertips
Living global tax intelligence layer. Answers complex questions in minutes with cited sources.
Agent: AI-driven end-to-end tax compliance automation
AI agents execute the full compliance lifecycle. Humans supervise and approve
Audit: Access and ask your tax data anything
Audit readiness from weeks to minutes. All your tax data at the push of a button
The onboarding with Fonoa has been exceptional. There was no delay on their end and our tax engine was up and running within two months. It’s hands down the best onboarding experience we’ve had with any tax finance provider.
Our previous provider was low cost, but we paid for it in engineering hours. With Fonoa, we’re not firefighting anymore.
Fonoa lets us sleep at night. We don’t have to worry about compliance while we scale.
Everyone we work with at Fonoa is nothing short of amazing. The responsiveness, the willingness to help, the speed at which we can get on a call and solve problems—it’s unlike anything we’ve experienced with other vendors. They actually listen, they care, and they deliver.
Fonoa allows Uber to validate taxpayer status both in VIES, and in the national databases across the EU, allowing us to have a complete picture over the taxpayer status of our supplier base.
Proof points
Built to handle the complexity of global tax at scale
Jurisdictions
Tax Engine + E-Invoicing combined coverage
Countries
Validate tax IDs using official databases
Median time to implement
vs. 9–14 months industry average
Sellers onboarded
E-invoicing solutions for 1M+ sellers on leading global marketplaces
Customer stories
Don’t just take our word for it. Why companies around the world prefer Fonoa.
You have to understand your company's needs. There is no “one size fits all" approach when it comes to e-invoicing." — Alexandra Dubois
Customer stories
Don’t just take our word for it. Why companies around the world prefer Fonoa.
When we talk about scaling, we want to automatically trigger an API to see if the tax ID is valid or not. Fonoa’s API was a huge differentiator." — Renan Bastazini
Customer stories
Don’t just take our word for it. Why companies around the world prefer Fonoa.
With Fonoa, I don't have to constantly think about invoicing while we grow. That's the best thing that could happen–fully trusting our invoice provider. — Tobias Laber
Customer stories
Don’t just take our word for it. Why companies around the world prefer Fonoa.
Fonoa’s solutions aren’t just saving us time, they’re helping us stay ahead of regulatory change, globally." –Kirsten Best, Head of VAT at Remote
The future of tax is autonomous.
See it in action.
