Monero

Paranoid Crypto ↗Security & privacy

Google's open-source library for detecting weaknesses in cryptographic keys and signatures.

Patreon Finance & payments

A membership platform for funding creators.

Monzo ↗Finance & payments

A UK digital bank.

Mercury Finance & payments

An online banking service for businesses and individuals.

Privacy Guides ↗Security & privacy

A community website recommending privacy tools, including VPN providers.

Aiwyn Tax connector ↗Finance & payments

A Claude marketplace connector that uses a tax engine to back and correct Claude's tax calculations.

AWS-LC Security & privacy

AWS's general-purpose cryptographic library derived from BoringSSL.

Wero ↗Finance & payments

A European bank-backed wallet and instant payment scheme built on SEPA transfers.

BLIK ↗

A Polish mobile payment system.

Airwallex

Financial platform offering virtual card issuing among other payment services.

Aiwyn Tax connector ↗

A Claude marketplace connector that uses a tax engine to back and correct Claude's tax calculations.

Allica Bank

A UK bank serving small and medium-sized businesses.

Cake Wallet

A non-custodial cryptocurrency wallet app.

Chase UK

The UK retail bank of J.P. Morgan.

Chaum eCash ↗

David Chaum's blind-signature electronic cash system and its newer revival.

Current Account Switch Service ↗

A UK service that moves direct debits, balances and incoming payments to a new bank account.

Curve

A card aggregation service that can link to other bank cards.

Fact Graph ↗

The IRS's open-sourced tax logic knowledge graph from the Direct File program.

First Direct

A UK bank offering phone and online banking.

FreeTaxUSA

A US online tax filing service.