GleanEnterprise AI that understands your company
vs
Retell AIAI Voice Agents That Automate Phone Calls
Comparison · AI Agents · weekly run Nov 3
Glean vs Retell AI
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Retell AI is the stronger AI pick in AI Agents: it has a visibility score of 2 versus 0.9 for Glean.
Choose Glean if…
- You need ISO 42001 or TX-RAMP Level 2 coverage
- You prefer a larger, established vendor (501–1,000 employees)
- Enterprise search across many connected apps
- Seen as a market leader in enterprise search
Choose Retell AI if…
- You want the brand AI engines rank higher (2 vs 0.9)
- You need a self-hosted or on-premises option
- Highly rated by developers and SMBs
- One of the highest customer star ratings
AI visibility side by side
Latest weekly run · Nov 3
| Metric | Glean | Retell AI |
|---|---|---|
| Visibility score | 0.9% | 2% |
| Change vs last week | New | New |
| Rank in AI Agents | #63 | #42 |
| Share of voice | 0.4% | 0.5% |
| Mentions this run | 3 | 3 |
| 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 · Retell AI 0pp over 0 weekly runs.
Engine by engine
Retell AI leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
GleanRetell AI
Head to head in AI answers
0 engine answers name both brands
0Glean ranked higher
0Retell AI ranked higher
Features, pricing & fit
| Dimension | Glean | Retell AI |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Contact sales |
| Free plan | — | Yes |
| Deployment | Per-customer search model stored in the customer's VPC | Cloud platform, with enterprise on-premises deployment available |
| Integrations | 250+ | — |
| Compliance | ISO 42001, HIPAA, TX-RAMP Level 2, SOC 2 Type II, ISO 27001, GDPR | HIPAA, SOC 2 Type II, GDPR, ISO 27001 |
| Support | Help Center | Community and email support, 24/7 omnichannel support with dedicated portal (Enterprise), Dedicated implementation support (Enterprise), Named account manager (Enterprise) |
| Founded | 2019 | 2023 |
| Headquarters | San Francisco, CA | Redwood City, California |
| Employees | 501–1,000 | 51–200 |
| Funding | Seed or early-stage round (emerged from stealth) · $765M raised | Seed · $5M raised |
| Best for | Large enterprises that want AI answers and agents grounded in their own permission-aware company data | Businesses that run high call volumes in healthcare, insurance, financial services, logistics and similar fields, and teams that want to build and change voice agents themselves. |
Plans side by side
Glean
Pricing not available.
Retell AI
Pay as you go$0per minute, $0.07-$0.31 for voice agents
EnterpriseCustomcustom pricing
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
Retell AI
- Highly rated by developers and SMBs
- One of the highest customer star ratings
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Glean vs Retell AI”, https://slateindex.ai/compare/glean-vs-retell-ai, data of Nov 3, 2026. Licence: CC BY 4.0.