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Skiff
An end-to-end encrypted workspace for email, docs, and calendar, now part of Notion.
What it does
Provides end-to-end encrypted email with aliases and custom domain support. Features a collaborative 'Docs' editor with E2EE, similar to Google Docs but private. Includes an encrypted 'Calendar' with meeting scheduling and sync capabilities. Offers 'Skiff Drive' for high-security, decentralized cloud file storage. Ensures that not even the Skiff team can read user data through zero-knowledge encryption.
Why it works
Privacy: One of the few suites where encryption is applied not just to email, but to documents and files. User Experience: Built with a modern, high-performance UI that rivals the 'Big Tech' tools it replaces. Decentralization: Integrated with IPFS (InterPlanetary File System) for high-resilience data storage. Trust: Leverages open-source encryption standards to build user confidence.
Category: Productivity
Team Size: 30
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As of 2026
Productivity
Revenue: $1M-$10M ARR
An end-to-end encrypted workspace for email, docs, and calendar, now part of Notion.
Overview
Skiff was a leading privacy-focused productivity suite that provided end-to-end encrypted (E2EE) alternatives to Gmail and Google Workspace. It unified encrypted email, collaborative documents, and a calendar into a single, high-security dashboard. After achieving rapid growth and reaching over 2 million users, the platform was acquired by Notion in early 2024 to lead their security and encryption efforts.
Funding status: Acquired
Revenue source: Subscriptions
Customer type: B2C
Pricing: Freemium
Tech stack: React, Node.js, Rust, IPFS, AWS
Platform: Web • iOS • Android • MacOS • Windows
Integrations: Notion, Metamask, Keplr Wallet, ENS, Unstoppable Domains
Founder story
Founded in 2020 by Andrew Milich and Jason Ginsberg in San Francisco. Andrew and Jason, both software engineers, believed that 'privacy shouldn't be a premium.' They built Skiff to make professional-grade encryption as easy to use as a standard email account, eventually reaching 2M+ users before joining Notion.
What it does
- Provides end-to-end encrypted email with aliases and custom domain support
- Features a collaborative 'Docs' editor with E2EE, similar to Google Docs but private
- Includes an encrypted 'Calendar' with meeting scheduling and sync capabilities
- Offers 'Skiff Drive' for high-security, decentralized cloud file storage
- Ensures that not even the Skiff team can read user data through zero-knowledge encryption.
Who it's for
- Privacy Advocates
- Journalists and Activists
- High-security Small Businesses
- Web3 and Crypto Teams
Why it works
- Privacy: One of the few suites where encryption is applied not just to email, but to documents and files
- User Experience: Built with a modern, high-performance UI that rivals the 'Big Tech' tools it replaces
- Decentralization: Integrated with IPFS (InterPlanetary File System) for high-resilience data storage
- Trust: Leverages open-source encryption standards to build user confidence.
Growth strategies
- Targeted the 'Privacy- conscious' niche during a period of growing surveillance concerns.
- Used an aggressive product- led approach with a powerful 'Free Forever' tier.
- Raised $14.2M+ in funding led by Sequoia Capital to fuel rapid product iteration.
- Successfully pivoted into an acquisition by Notion (Feb 2024) to integrate E2EE into the Notion workspace.
Alternatives
Comparison overview
- Proton: The established leader; Skiff was often cited for its better document collaboration and modern UI.
- Tutanota: Strong privacy; Skiff was the specialist for 'encrypted workspace' and Web3 integration.
- Now part of Notion, Skiff's technology is the foundation for the next generation of secure work.