From decoding a new country mandate to shipping bug-free conversions and passing validation — we cover the specialist e-invoicing work most teams can't staff in-house.
In-depth mandate analysis, specification interpretation and implementation roadmaps — plus cross-border readiness and compliance audits.
High-end, bug-free any-to-any conversions across UBL, CII, PINT, Factur-X & national syntaxes — with mapping documents, samples and template QA.
Schematron authoring & fixing, validation business-rule design and a full e-invoice validation service — so documents pass first time.
Peppol network (4/5-corner, C4 & C5), every PINT specification and all UBL versions — and building solutions on top of them.
Guiding SPs and startups on how to architect an e-invoicing solution — including the role of AI and where the market is heading — plus ERP integration.
Hands-on training on the Peppol network, e-invoice specifications and how mappings are really built and used.
Extend your team with mandate analysis, conversions, validation and release work you can white-label.
Specification maintenance, release management and QA that keep your domain rollout on track.
Understand your specs and each target country, and build a solution that reduces compliance risk.
Architecture guidance, standards know-how and an AI-aware view of where the product should go.
Our people live inside the specifications — Peppol, PINT, UBL and the national syntaxes. That same rigour is what turns into the tools we open-source and the products we ship.
Peppol 4/5-corner models, every PINT variant and all UBL versions — mapped, validated and delivered.
Conversions and templates backed by real Schematron validation and QA — audit-ready output.
Hard-won experience across mandates, corner models and cross-border rollouts — now feeding a growing product line.
Sixteen years fighting XSLT and Schematron taught us the primitives are broken. Labs is where we replace them — open language, in the open.
Rules name business terms, not paths — so one rule set validates UBL and CII alike. No XPath, no Saxon, no JVM. Our open Schematron alternative.
Explore VERIX VERTAAuthor a mapping with validation built in, then compile to an ordinary XSLT 2.0 stylesheet you deploy anywhere. Our open XSLT alternative.
Explore VERTA ProbenRehearse an integration against every e-invoicing network model — clearance, reporting, Peppol, 5-corner, post-audit — in one place, before you go live.
Explore ProbenThe same craft, pointed at joy. Original mobile games, built in-house for iOS and Android.
Rotate a glass box and let gravity tumble the gems — each must leave through the exit of its own colour. A tactile physics puzzle across 30 hand-authored levels.
See Tumble Thinking Games · dailyA daily logic & AI puzzle network with friend leagues and streaks — solver-verified, fresh every day, on web and mobile.
See Thinking GamesThe things we keep explaining on projects — written down.
VAT in the Digital Age is one package, three pillars and a decade of deadlines. Here is what will bind you, what stays optional, and the 2030 and 2035 dates that reshape every cross-border roadmap.
Read article ArchitectureAdding the tax authority as a fifth corner is not a config change — it reshapes your send path, your error handling and your definition of "done". Here is what actually moves between the models.
Read articleE-invoicing compliance means issuing, exchanging and reporting invoices in the exact electronic format and process a country's tax authority mandates — the correct syntax (UBL, CII, PINT), validation rules and clearance model. We help you meet those requirements in every market you operate in.
Dozens of countries now mandate e-invoicing — including Italy, India, Saudi Arabia, Malaysia, Poland, France, Germany and Belgium — with more rolling out each year. See our live country-mandate tracker for status, formats and timelines.
Peppol is an international network for exchanging compliant e-invoices using a 4- or 5-corner model. PINT (Peppol International) is the global invoice specification built on UBL. Our team works across the Peppol network, every PINT specification and all UBL versions.
We deliver bug-free, any-to-any conversion across UBL, CII, PINT, Factur-X and national syntaxes such as XRechnung, ZUGFeRD, FatturaPA and Finvoice — with mapping documents, samples and QA.
Hanuma Labs is our open-source arm, building the developer tools we wished existed: VERIX (a validation language that replaces Schematron), VERTA (a transformation language that replaces XSLT) and Proben (a CTC network sandbox).
Yes. Alongside our compliance work and developer tools, we build original mobile games for iOS and Android — Tumble and the Thinking Games daily-puzzle network. Same craft, different canvas.
Hands-on utilities that run entirely in your browser.
Scrub a country's mandate timeline and watch an invoice become the document the law will require.
Open toolOpen a UBL, Factur-X, XRechnung or FatturaPA file and read every EN 16931 field.
Open viewerSample generator, Peppol lookup and more — hands-on utilities for the e-invoicing community.
Browse toolsA country mandate, a format conversion, a tool to build — or a game idea. Tell us what you're working on and a specialist will follow up.
