Glean vs OpenAI Assistants
An enterprise AI work assistant and agent that connects to all your company's data sources (Slack, Drive, email, tickets) to answer questions, find documents and run agentic workflows across your organization securely.
🧠 Expert verdict
Our expert verdict: Glean and OpenAI Assistants are very evenly matched at 4.6/5, so the right pick comes down to your priorities, and it stands out for "Searches across all company apps at once". Choose Glean if you want the best agents tool overall, especially for enterprise knowledge search; pick OpenAI Assistants if its pricing or specific features matters more for your workflow.
Glean
An enterprise AI work assistant and agent that connects to all your company's data sources (Slack, Drive, email, tickets) to answer questions, find documents and run agentic workflows across your organization securely.
OpenAI Assistants
OpenAI API for building AI assistants with persistent threads, file search, code interpreter, and function calling.
Glean
✅ Pros
- +Searches across all company apps at once
- +Enterprise-grade security & permissions
- +Agentic workflows over company data
- +Strong for large teams
- +Backed by Sequoia ($40M Series B, 2026)
❌ Cons
- −Built for enterprises, not individuals
- −Per-seat pricing adds up
- −Setup requires IT/admin
- −Overkill for small teams
🎯 Best for — Glean
🏷️ Tags — Glean
Our Verdict
Glean and OpenAI Assistants are equally matched — your choice depends on your specific use case and budget.
Expert take on each tool
📌 Glean
Glean is the top enterprise AI work assistant of 2026: it unifies search and agentic actions across all your company tools with strong security. Ideal for medium-to-large organizations; individuals and tiny teams will find it more than they need.
❓ Frequently Asked Questions
Which is better: Glean or OpenAI Assistants?
Glean and OpenAI Assistants are rated equally (4.6/5), so the better choice depends on your specific use case, pricing preference, and feature needs — see the full comparison above for details.
Is Glean or OpenAI Assistants cheaper?
Glean (Limited free / from $30/seat/mo) is generally more budget-friendly than OpenAI Assistants (Pay as you go). If cost is your main concern, Glean is worth trying first — but compare the feature sets above to confirm it covers what you need.
Can I switch from Glean to OpenAI Assistants?
Yes — switching between Glean and OpenAI Assistants is usually straightforward since both are agents tools with similar core workflows. Most users can export their data and get started with OpenAI Assistants within a day; just check OpenAI Assistants's free plan before committing to a paid tier.