E-invoicing infrastructure

Invopop

Every new country meant another invoicing vendor

At Cabify, Sam Lown met a different e-invoicing regime in every Latin American market. In 2020 he started on the fix: an open invoice format, and one API that now covers 30+ countries.

Spotlight Images: Invopop, Economía 3

Invopop co-founders Sam Lown and Juan Moliner at South Summit Madrid 2024, in matching caps

30+countries covered through one APICompany-reported, as of Oct 2026 · Source for 30+ countries covered through one API
12 → 5 weeksMews's average development time per new market, before and after InvopopCustomer-reported, as of Sep 2026 · Source for 12 → 5 weeks Mews's average development time per new market, before and after Invopop
6 → 2 weeksPayhawk's build time: Belgium, its first country, then each one sinceCustomer-reported, as of Sep 2026 · Source for 6 → 2 weeks Payhawk's build time: Belgium, its first country, then each one since

Founders: Juan Moliner; Sam Lown
HQ: Madrid, Spain
Sector: E-invoicing and tax compliance
Website: Visit Invopop

Born Capital is an investor in Invopop.

The story

A vendor per country

Sam Lown spent seven years as CTO of Cabify, the Spanish ride-hailing company he helped start in 2011. In Spain, as his co-founder Juan Moliner tells it, billing was one of its edges over Uber: a company got a single invoice for its staff's rides each month. Latin America was different. Across much of the region e-invoicing was already law, and an invoice was only complete once it had passed through the tax authority. Each new country brought new rules and another local vendor to wire in. Lown looked for one provider that covered them all and found none. In mid-2020 he started building it. That October, in Invopop's first blog post, he used the PDF from a Cabify ride as his example: created digitally, then scanned or retyped by hand to get it into the books.

An open language for invoices

His first move was to separate the data from the paperwork. On September 2, 2020, a GitHub repository went up for GOBL, short for Go Business Language: a Go library that holds the tax rates and validation rules of each country it supports, so a developer can write an invoice as plain JSON. Invopop's platform turns that JSON into the format each country demands. A customer sends one GOBL document; Invopop signs it where needed and routes it to the right tax office or through the Peppol network. GOBL is open source under Apache 2.0, with more than 3,800 commits behind it.

Coffee, then San Francisco

Invopop raised €550,000 in pre-seed money in early 2021. In September 2022 Lown went looking for a business co-founder willing to move to Madrid. Juan Moliner, a consultant who had seen in Mexico how heavy e-invoicing could be, came across Invopop during two months at a venture fund, then saw the search on LinkedIn. They met for coffee and became partners that month. In January 2023 they joined a startup accelerator in San Francisco; Invopop was by then operating in Colombia, Spain and Portugal. In June 2024 Invopop won the South Summit Madrid startup competition.

Agents draft, GOBL checks

Invopop's AI work happens where developers build, and GOBL suits a coding agent well. The agent writes the invoice as plain JSON; GOBL works out the totals and rejects anything that breaks the country's rules, pointing to the fields at fault. Invopop's guide for agents lists the mistakes they make most often, each checked against the current GOBL release. In March 2026 the team began rewriting the Invopop CLI around agents, with JSON output and no interactive prompts. It landed in April with a Claude Code skill built in.

Weeks, not quarters

Then the deadlines arrived. Belgium made e-invoices between businesses mandatory in January 2026, with Peppol as the default channel. On September 1, 2026, every French company had to be able to receive them, and large and mid-sized ones to send them. Mews, the hospitality software company, says its development time per new market averaged 12 weeks before Invopop and five since; France, its largest and hardest market, went live in under five. Payhawk says its first country, Belgium, took about six weeks to build and each country since about two. The invoices it receives through Invopop now come in as structured data, ready for its own systems and for AI tools to process. In August 2024 Moliner was deliberately keeping the team small, at six; Invopop now lists 19 people on its team.

Visit invopop.com

AI at Invopop

Invopop treats AI coding agents as users in their own right, alongside the developers who steer them. Agents get the same guardrails as people: GOBL's rules for each country it supports, and no more access than their user has.

Docs written for coding agents, with an llms.txt index, an AGENTS.md rules file and MCP servers for the Invopop and GOBL docs
GOBL as a local MCP server, so an agent can build and validate invoices and draft credit notes
A Claude Code skill in the Invopop CLI, signed in with short-lived tokens that never exceed the user’s own access

The founders

Juan Moliner
Co-founder and CEO
An industrial engineer from Burgos, educated at Universidad Politécnica de Madrid and Politecnico di Milano. Before Invopop he spent three and a half years at BCG. Forbes 30 Under 30 Europe, 2025.
Sam Lown
Founder and CTO
A software developer who, by 2020, had spent 15 years on e-commerce projects selling everything from flowers to conference tickets and rides. He helped start Cabify, which became Spain's first unicorn, and designed GOBL, the open-source invoice format at the heart of Invopop.

Milestones

2020
Sam Lown starts Invopop and opens the GOBL repository on GitHub.
2021Jan
Raises a €550,000 pre-seed round.
2022Sep
Juan Moliner joins Sam Lown as co-founder after spotting his search on LinkedIn.
2023Jan
Joins a San Francisco startup accelerator while operating in Colombia, Spain and Portugal.
2024Jun
Wins the South Summit Madrid 2024 startup competition.
2025Nov
Payhawk announces a Europe-wide e-invoicing partnership with Invopop.
2026Apr
Invopop CLI rewritten for AI coding agents, with a built-in Claude Code skill.