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International software agency

Software,
built end to end.

Apps, platforms and AI assistants for companies in Europe and the United States. Design, engineering and infrastructure under one roof.

See the work Start a project

Mobile apps

Native apps for iOS and Android, ready for the App Store and Google Play. One codebase, both stores, and the release process handled.

AI & automation

Chatbots on WhatsApp and inside your website — sales, bookings, advice, support — plus the automations that run the work nobody should be doing by hand.

Business software

Bookings, CRM, stock, invoicing and internal panels, built around how the company actually works rather than around a template.

Selected work

Shipped, and online

Every screenshot is the live product, taken from the address next to it.

FlagshipIn progress

Anonyme

An encrypted messenger with no phone number, no email and no account. Your identity is a key pair generated on your device.

X3DH and Double Ratchet encryption, encrypted photos, voice and video calls, its own relay server and a signed Android build. Built in house, from the protocol to the store listing.

Next.js · Capacitor · Node · Postgres · WebRTC anonyme.is ↗

The Anonyme app: create your identity, no phone number required.
Berkane booking page with a calendar of available slots.

Appointments & CRM

Berkane

Clients book online; the owner runs the day from a private panel. No two people can take the same hour.

berkane.vercel.app ↗

El Baraca digital menu on a phone-sized layout.

QR menus

El Baraca

A menu reached from a QR code on the table. Mark a dish sold out from your phone and it updates for everyone.

elbaraca.vercel.app ↗

Anonyme eSIM store listing international data plans.

Marketplace

Anonyme eSIM

International data plans with wallet top-ups. Catalogue, checkout and delivery of the eSIM profile in one place.

anonyme-esims.vercel.app ↗

AI chatbotsWhatsApp & webAny language

Chatbots, on WhatsApp and on your site

The same assistant on two channels: a business's own WhatsApp number and a widget inside its website — like the one on this page. Around the clock, in the customer's language, anywhere in the world.

  • Sales Recommend the product, generate the payment link, and deliver the file or confirm the order once the payment clears.
  • Bookings Restaurants, clinics, salons, workshops: the slot lands in the same calendar the staff already use, with the confirmation sent.
  • Advice Walk a visitor through options, sizes, plans or paperwork, and hand over to a person with the conversation already in context.
  • Information Prices, opening hours, address, order status, documents — answered at three in the morning without waking anyone.

Gemini · Evolution API · Node

What we build

All kinds of software

Tell us what you need built.

Write with the problem, not the spec. We reply in English or Spanish.

info@core404.com