GleanEnterprise AI that understands your company
vs
HaystackOpen-source framework and enterprise platform for AI agents and RAG applications.
Comparison · AI Agents · weekly run Nov 3
Glean vs Haystack
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Glean is the stronger AI pick in AI Agents: it has a visibility score of 0.9 versus 0 for Haystack.
Choose Glean if…
- You want the brand AI engines rank higher (0.9 vs 0)
- You need ISO 42001 or HIPAA or TX-RAMP Level 2 or SOC 2 Type II or ISO 27001 or GDPR coverage
- You prefer a larger, established vendor (501–1,000 employees)
- Enterprise search across many connected apps
Choose Haystack if…
- You need a self-hosted or on-premises option
- You need SOC 2 Type 2 (vendor claim, not an independent report) coverage
AI visibility side by side
Latest weekly run · Nov 3
| Metric | Glean | Haystack |
|---|---|---|
| Visibility score | 0.9% | 0% |
| Change vs last week | New | New |
| Rank in AI Agents | #63 | #76 |
| Share of voice | 0.4% | 0% |
| Mentions this run | 3 | 0 |
| Positive in AI answers | 56% | — |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Glean 0pp · Haystack 0pp over 0 weekly runs.
Engine by engine
Glean leads on 1 of 3 engines
ChatGPT
AI Mode
Perplexity
GleanHaystack
Head to head in AI answers
0 engine answers name both brands
0Glean ranked higher
0Haystack ranked higher
Features, pricing & fit
| Dimension | Glean | Haystack |
|---|---|---|
| Deployment | Per-customer search model stored in the customer's VPC | Managed cloud, self-hosted, and sovereign or air-gapped environments, including STACKIT for sovereign European cloud |
| Integrations | 250+ | — |
| Compliance | ISO 42001, HIPAA, TX-RAMP Level 2, SOC 2 Type II, ISO 27001, GDPR | SOC 2 Type 2 (vendor claim, not an independent report) |
| Support | Help Center | — |
| Founded | 2019 | 2018 |
| Headquarters | San Francisco, CA | Berlin, Germany |
| Employees | 501–1,000 | 51–200 |
| Funding | Seed or early-stage round (emerged from stealth) · $765M raised | Round led by Balderton Capital, with GV, Harpoon, System.One and Lunar participating · $46M raised |
| Best for | Large enterprises that want AI answers and agents grounded in their own permission-aware company data | Teams building AI agents and RAG applications with Python |
Pros and cons
Themes from the AI answers that mention each brand
Glean
- Enterprise search across many connected apps
- Seen as a market leader in enterprise search
- Finds answers and internal experts quickly
- Recommended for enterprise-wide knowledge search
Haystack
Profile in progress.
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Glean vs Haystack”, https://slateindex.ai/compare/glean-vs-haystack, data of Nov 3, 2026. Licence: CC BY 4.0.