Alpha21 — Technology Consulting

From the circuit board
to the app store.

Alpha21 is a technology consultancy that designs and builds across the whole stack — boards, firmware, apps, cryptography and models — and takes on a small number of projects at a time.

See our work
  • Mobile & web
  • Firmware
  • Hardware
  • Blockchain
  • ML & AI

Capabilities

Five disciplines, one team

The products below need boards, firmware, apps, cryptography and models. We build all of it in-house, which is also what we offer to the clients we take on.

01

Mobile & web apps

The apps people actually touch: phone clients that talk to the hardware underneath, and the web consoles the operators behind them live in.

02

Firmware & embedded

Low-power firmware for connected devices — BLE and cellular — plus the update pipeline that keeps them current once they're out of reach.

03

Hardware design

Electronics from schematic to a board that survives a real vehicle — layout, bring-up, and the test rigs that prove it.

04

Blockchain

Bitcoin and EVM work from people who were in it early enough to have written the proofs custodians now publish.

05

Machine learning & AI

Models put to work inside products — search that understands images, agents that drive real instruments.

How we work in each one

Projects

Selected work

Products we have designed, built and shipped. They are the reason the capabilities above are more than a list.

Revvit

Rent out ATVs and scooters without handing over a key.

revvit.app

Keyvo

Leave the key at home.

keyvo.app

HardStack

Your bench, operated from anywhere.

hardstack.com

Cualto

Estamos construyendo algo grande.

cual.to

SZSTUFF

Practical links for people who just got to Shenzhen.

szstuff.com
What each one does

Contact

Tell us what you're building

A board that needs firmware, an app that needs a board, a wallet that needs auditing, a model that needs somewhere to run — if it is one of our five disciplines, we would like to hear about it.