- Diogel
  Nostr signing and key-protection tools for safer identity workflows.
- Nostrfi
  Nostr relay, storage, and backend-service infrastructure for builders and operators.
- Nostr Product Development
  Focused engineering support for teams building Nostr-native products, tools, and protocol-aware user experiences.
- Bitcoin Product Development
  Specialist engineering for Bitcoin-native and Bitcoin-aligned products with stronger ownership, payments, and digital sovereignty models.
- About
  Learn more about Threenine, our direction, and why we build in this space.
- Blog
  Practical Bitcoin, Nostr, and product engineering guides.

Product suites for Nostr signing and infrastructure

Threenine builds owned product suites for safer Nostr signing, stronger identity control, relays, storage, backend services, and practical open-protocol workflows.

Explore Diogel Explore Nostrfi

Diogel leads the current public product stack.

Diogel is the clearest public proof of the direction: a signer product built around user control, multiple identities, readable approval flows, local key protection, and practical Nostr usability.

View Diogel Read setup guide

Portfolio direction

Identity and signing tools that keep users closer to their own keys and decisions.
Relay, storage, and backend-service infrastructure for teams building dependable Nostr applications.
Privacy-sensitive product components aligned to digital sovereignty rather than platform lock-in.

Product suites

Two pillars for the current company strategy.

Diogel owns safer Nostr signing and identity workflows. Nostrfi owns relay, storage, backend-service, and operator infrastructure.

Diogel

Diogel is the threenine product suite for Nostr signing safety, identity control, and private-key protection across browser, mobile, and organisational workflows.

Diogel is the threenine suite for Nostr signing safety. It covers browser signing, mobile signing, and organisational signing control, starting with a free open-source NIP-07 browser extension.

Nostrfi

Nostrfi is the threenine product suite for Nostr relay, storage, backend-service, and operator infrastructure.

Nostrfi is the threenine suite for Nostr infrastructure. It covers relay software, event storage, backend services, and the operator practices needed to run them dependably.