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.
- 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.
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.
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.
Hardware design
Electronics from schematic to a board that survives a real vehicle — layout, bring-up, and the test rigs that prove it.
Blockchain
Bitcoin and EVM work from people who were in it early enough to have written the proofs custodians now publish.
Machine learning & AI
Models put to work inside products — search that understands images, agents that drive real instruments.
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.
Keyvo
Leave the key at home.
HardStack
Your bench, operated from anywhere.
Cualto
Estamos construyendo algo grande.
SZSTUFF
Practical links for people who just got to Shenzhen.
VisaNudge
Never overstay by accident.
TabPhone
Your phone number, in a browser tab.
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.