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The Verdict
Glean solves the massive problem of siloed company knowledge. By connecting securely to Google Drive, Jira, Slack, and dozens of other tools, it acts as an omniscient internal assistant. If your team wastes hours looking for documents or asking "who knows about X," Glean is an indispensable investment for 2026.
Pros
- Respects existing file permissions perfectly across all apps.
- Incredible semantic search that understands company jargon.
- Connects natively to practically every major enterprise platform.
Cons
- Setup requires significant IT involvement for security audits.
- Too complex and expensive for small companies with few documents.
Deep Dive: How it works
Glean works by indexing everything your company has ever created—messages, code, docs, and tickets—and making it instantly conversational. What makes Glean the leader in 2026 is its rigorous approach to data governance. If an employee asks Glean a question, it only formulates an answer using documents that the specific employee has permission to view natively.
The Glean Chat interface functions like an internal ChatGPT that actually knows your business. Need a summary of the Q3 roadmap discussed in a scattered Slack thread and a Jira epic? Glean pulls it all together in seconds, complete with citations so you can verify the source material. It bridges the gap between scattered silos without moving any data.
Key Features
Strict Permissions
Maintains ACLs from source apps. You only see what you're allowed to see.
100+ Connectors
Out-of-the-box integrations with Google Workspace, Slack, Jira, GitHub, and more.
Glean Chat
A conversational interface that synthesizes answers across multiple apps.
Knowledge Graph
Understands company acronyms and relationships between employees automatically.