Glean vs Superhuman

Glean is an enterprise work AI platform that indexes a company's apps, documents and conversations and lets employees search, ask questions and run agents over that knowledge. It was founded in 2019 in Palo Alto by former Google search engineer Arvind Jain, who previously co-founded Rubrik, and it raised a $150 million Series F at a $7.2 billion valuation in June 2025.

The platform has three layers: Glean Search, a ranked enterprise search; Glean Assistant, a chat assistant grounded in company data; and Glean Agents, which automate multi-step work from natural-language instructions. Underneath sit 275+ connectors, an Enterprise Graph that maps people, content and activity, and permission enforcement that mirrors each source system in near real time. It also offers APIs and MCP support. Pricing is not published; it is sold per seat through sales, with demos instead of a self-serve trial.

Glean fits large organizations with knowledge scattered across Slack, Google Drive, Confluence, Jira, Salesforce and code hosts. It is overkill and likely too costly for small companies, and results depend on clean permissions in source systems. Microsoft 365 Copilot is the natural rival for Microsoft-centric firms, ChatGPT Enterprise offers broader general AI with connectors, and Notion AI covers search well if Notion is already your wiki.

Glean announced in December 2025 that its annual recurring revenue had passed $200 million, doubling in nine months. When evaluating, run a pilot on your messiest knowledge sources and test permission boundaries with a few restricted documents.

Superhuman is a premium email client for Gmail and Outlook accounts, founded in 2014 by Rahul Vohra in San Francisco. It is built around speed: nearly every action has a keyboard shortcut, the interface is designed to respond instantly, and a guided onboarding teaches users to process email toward inbox zero.

Key features include split inboxes that separate important senders from newsletters and notifications, snippets for reusable text, reminders that bring back threads when nobody replies, scheduled sending, undo send, read statuses and calendar integration. Its AI features write and edit replies in your tone, summarize long threads, auto-label and triage incoming email, and let you ask questions across your mailbox. Pricing is per user per month with Starter, Business and Enterprise tiers; Business adds team features and CRM integrations, and Enterprise adds SSO and security controls. Grammarly acquired Superhuman in 2025 and has since used the Superhuman name for its wider productivity suite.

Superhuman is worth the cost for founders, investors, executives and salespeople who handle hundreds of emails a day, where saving even a few minutes per hour adds up. Light email users will not notice enough difference to justify the price, and it only supports Gmail and Microsoft accounts. Gmail with Gemini or Outlook with Copilot covers basic AI help, Spark offers a cheaper smart inbox, and Shortwave is the closest AI-first alternative for Gmail users.