Glean vs Mainframe
Which Agents AI tool is better in 2026?
Glean
Work AI for the entire enterprise
Mainframe
Building interfaces for the future where operating systems are built around actions, not apps, powered by AI.
Side-by-side
| Glean | Mainframe | |
|---|---|---|
| Tagline | Work AI for the entire enterprise | Building interfaces for the future where operating systems are built around actions, not apps, powered by AI. |
| Founded | 2019 | 2026 |
| HQ | Palo Alto, US | — |
| Employees | 500-1000 | 1-10 |
| Total funding | $750M | Undisclosed |
| Latest round | Series F · Jun 2025 | — |
| Valuation | $7.2B | — |
| Cheapest paid plan | Pricing not disclosed | Pricing not disclosed |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Top tier price | Pricing not disclosed | Pricing not disclosed |
| Pricing summary | Enterprise · Contact sales | Enterprise · Contact sales |
| Categories |
Capability matrix
Developer-facing capabilities and access signals for Glean and Mainframe.
| Capability | Glean | Mainframe |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | 4 (Python, TypeScript, Java, Go) | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✓ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Glean
- Has raised more capital ($750M vs Undisclosed)
- Higher Neuron score (56 vs 28)
- More mature (2019)
- Verified profile
🔵 Strengths of Mainframe
- Newer company (2026)
Which should you choose?
Choose Mainframe if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI Agents tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Glean if you want the most established option — it has raised $750M, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
Glean vs Mainframe — which is better?
It depends on your priority. Glean has raised more capital and is the more established option; Mainframe has broader feature depth. See the side-by-side table above.
Is Glean cheaper than Mainframe?
No — Mainframe's cheapest paid plan is Enterprise · Contact sales, while Glean's is Enterprise · Contact sales.
Do Glean and Mainframe offer free plans?
Glean: Paid only. Mainframe: Paid only.
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