Features

Built for people who manage email at scale

People-centric delegation, local-first security, and AI tools that show their work.

People-centric views

Organize email by Person, not just account. Navigate relationships and see an aggregated timeline of interactions across all your connected inboxes. Each Person groups related Accounts so you never lose context.

  • Aggregated unread counts per Person
  • Identity-safe reply selection
  • Contact history across accounts

Multi-inbox delegation

Provide permissioned access to an Account or Person without sharing passwords. Assign role-based access tiers and maintain a complete audit trail of delegated actions.

  • Owner, Full, Triage, and Read permission tiers
  • Destructive action gating
  • Delegation audit logs

Archive ingest

Import and search exported archives (MBOX up to 50 GB+, PST/OST up to 30 GB+, EML files) directly on your device. Deterministic progress tracking with checkpoint recovery for large imports.

  • MBOX, PST, OST, and EML format support
  • Checkpoint resume on interruption
  • Local FTS5 search indexing

AI tools

Summarize threads, extract entities, draft replies, and search your vaults using natural language. Every AI action shows its inputs and outputs in a glass-box pattern. Local AI runs by default; cloud AI requires explicit consent per action.

  • Local AI: priority scoring, categorization, entity extraction
  • Cloud AI: summarization, draft assistance, Q&A
  • Per-action consent sheet with payload preview

Vault encryption

Every local data boundary is an encrypted Vault. Message content, search indices, and connection metadata are encrypted using XChaCha20-Poly1305 with per-Vault key hierarchies derived via Argon2id and HKDF.

  • Ed25519 event signatures
  • X25519 envelope encryption
  • Epoch-based key rotation

Handoff plans

Generate guided action plans to transfer responsibility. Each Handoff includes full context, next steps, and a complete audit trail so nothing falls through the cracks when passing work between people.

  • Auto-drafted context bundles
  • Actionable checklists
  • Visible provenance and history

Provider support

Connect to standard email providers and synchronize live messages seamlessly. All provider credentials are stored in your encrypted local Vault, never on our servers. OAuth-based connections where available.

  • Gmail and Google Workspace
  • Outlook and Microsoft 365
  • iCloud, Yahoo, Proton (via Bridge), generic IMAP/SMTP

Join the waitlist

Be the first to know when TwinMail launches.