Glean vs Thesis
Which Search AI tool is better in 2026?
Glean
Work AI for the entire enterprise
Thesis
Automate AI research
Side-by-side
Glean is the more established option (raised $750M); pricing is comparable on both sides.
| Metric | Glean | Thesis |
|---|---|---|
| Taglinei | Work AI for the entire enterprise | Automate AI research |
| Foundedi | 2019🏆 | 2025 |
| HQi | Palo Alto, US | San Francisco, US |
| Employeesi | 500-1000 | 1-10🏆 |
| Neuron scorei | 58🏆 | 50 |
| Total fundingi | $750M🏆 | $500K |
| Latest roundi | Series F · Jun 2025 | Seed · Jan 2025 |
| Valuationi | $7.2B🏆 | — |
| Cheapest paid plani | — | Pricing not disclosed |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Enterprise · Contact sales | Pricing not disclosed |
| Pricing summaryi | 1 published plans | Pricing not listed |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Glean and Thesis.
| Capability | Glean | Thesis |
|---|---|---|
| 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 $500K)
- Higher Neuron score (58 vs 50)
- More mature (2019)
- Verified profile
🔵 Strengths of Thesis
- Newer company (2025)
Which should you choose?
Choose Thesis if price matters most — it starts at Pricing not listed, which is friendlier for teams watching burn. Both AI Search 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 Thesis — which is better?
It depends on your priority. Glean has raised more capital and is the more established option; Thesis has broader feature depth. See the side-by-side table above.
Is Glean cheaper than Thesis?
No — Thesis's cheapest paid plan is Pricing not listed, while Glean's is Enterprise · Contact sales.
Do Glean and Thesis offer free plans?
Glean: Paid only. Thesis: Paid only.
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