epostari.sk

Snapshot

Project: ePoštári.sk — an independent comparison portal for digitálni poštári, the certified e-invoice delivery providers registered with the Slovak Financial Administration.

The hook: From 1 January 2027, domestic B2B invoices in Slovakia must flow through the state e-Faktúra system via a certified delivery-service provider. Hundreds of thousands of companies and sole traders have to pick one — and most of them don’t yet know the obligation exists.

What we shipped: The whole portal — a register-backed provider dataset, comparison and filtering, a guide hub covering the entire question space, FAQ, glossary and a news section. Roughly 60 static pages at launch, SEO-first, on Astro and Cloudflare Workers.

Why ship it 18 months before the deadline

SEO compounds. The queries this site targets — “digitálny poštár”, “e-faktúra 2027”, “povinná elektronická fakturácia” — barely exist today and will spike through late 2026 and 2027 as the deadline lands in the news. Publishing the deepest coverage early is how you own those results pages by the time the searches arrive. It’s the same playbook as our Peppol hub: pick a regulatory wave, build the authority resource before the wave breaks.

What we actually built

1. A comparison engine built on the official register

The dataset starts from the Financial Administration’s public register of certified providers and layers editorial work on top: 35 provider profiles across six solution categories (accounting/ERP software, invoicing services, EDI integrators, document workflow, payment solutions and more), each with pricing information, free-tier flags, integrations and a plain-language verdict on who it fits. Ordering is alphabetical and placement can’t be bought — a methodology page says so out loud, because an independent comparison site is only worth building if it stays independent.

2. A guide hub that answers the whole question space

Nine deep guide pages on the e-invoicing mandate itself — who is affected, the deadlines, the invoice format, the fines, what it means for small businesses, sole traders, non-VAT payers and which accounting software already complies — plus “how to choose a provider”, “what is a digital postman”, an FAQ, a glossary of the new terminology and a news section with RSS. Every page written in plain Slovak, because the source material (tax law) certainly isn’t.

3. SEO-first engineering

Static Astro 6 output with no client-side JavaScript where none is needed, semantic HTML, XML sitemap, robots.txt, RSS — and an llms.txt so AI assistants summarising the mandate cite the site correctly. Served from Cloudflare Workers with permanent redirects handled at the edge.

4. Built to be maintained, not relaunched

The register changes continuously, so the provider dataset is typed TypeScript data with “state as of” dating on every affected page, and news lives in a content collection. Updating the portal after a register change is a data edit and a paragraph, not a redesign.

Stack

Astro 6 · Tailwind CSS 4 · TypeScript · Cloudflare Workers · GitHub Actions.

The mandate is coming for the rest of the EU too

Under the EU’s ViDA package, e-invoicing mandates like Slovakia’s are rolling out across the Union. If your market is next and you want to own the search results before your competitors notice the wave, tell us about it — building authority portals ahead of regulatory deadlines is exactly what we do.