Glean vs Retell AI: 2026 comparison
Enterprise AI worker — unified search, work assistant, and custom agents grounded in your company knowledge.
Glean vs Retell AI — specs
| Spec | Glean | Retell AI |
|---|---|---|
| Agent Rank | 80 / 100 (A) | 72 / 100 (A) |
| Autonomy | Assistant | Autonomous |
| Pricing | Subscription · Free tier | Pay per task · Free tier |
| Open source | No | No |
| Capabilities | RAG, Memory, Tool use | Voice, Tool use, Memory |
| Integrations | 6 apps | 3 apps |
| Verified | Verified | Verified |
| Released | Feb 2025 | Mar 2025 |
Agent Rank breakdown
- Autonomy fit
- 7
- Capabilities
- 6
- Integrations
- 10
- Pricing value
- 9
- Polish & maturity
- 6
- Verifiability
- 10
Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?
- Autonomy fit
- 9
- Capabilities
- 6
- Integrations
- 4
- Pricing value
- 9
- Polish & maturity
- 5
- Verifiability
- 10
Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?
Pros & cons
- +Single best enterprise knowledge agent in 2026 — instant grounding in your company data
- +Custom Agents (Glean Agents) let teams build internal workflows without code
- +Strong permission-aware retrieval — agents see only what users are allowed to
- −Enterprise-only — typically $50K+ ACV minimum
- −Initial connector setup takes weeks for full coverage
- −Pricier than ChatGPT Enterprise on a per-seat basis
- +Lowest per-minute pricing among production voice agent platforms
- +Strong streaming latency (~300ms) competitive with ElevenLabs
- +Per-minute pricing easier to forecast than per-seat
- −Less polished out-of-the-box than Synthflow for non-technical buyers
- −Documentation and tooling still maturing vs ElevenLabs
- −Voice quality varies by model selection
Pricing
- +Unified search across 100+ apps
- +Work assistant + custom agents
- +SSO + enterprise data isolation
- +~$0.07/min
- +Production-ready API
- +Volume discounts
- +Dedicated infrastructure
- +Custom models
Which one should you pick?
Pick Retell AI if you want the highest autonomy and the verification loop is in place.
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Frequently asked
Should I pick Glean or Retell AI in 2026?+
Pick Glean if your stack spans many tools and integration depth is the constraint. Pick Retell AI if you want the highest autonomy and the verification loop is in place. Most working teams running both can use Glean for primary work and Retell AI for the workflows where its specific strengths matter.
What's the price difference between Glean and Retell AI?+
Both Glean and Retell AI start in the same pricing range (Subscription · Free tier vs Pay per task · Free tier). Total cost of ownership depends on your team size and volume — see the TCO calculator for your specific math.
Which is more autonomous, Glean or Retell AI?+
Retell AI is the more autonomous of the two (Autonomous vs Assistant). Higher autonomy ships throughput faster but requires verification loops in place — see our autonomous-vs-copilot framing for when each tier wins.