AI21 vs Levee
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
AI21 compared with Levee
| Detail | 
AI21 | 
Levee |
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| What it does | Post-train specialized models for your task, creating an AI edge your competitors can't buy
| Authorization layer for AI agent spend with human-approved mandates and tamper-evident proof
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| Stage | Established
| Startup
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| Founded | Not given
| 2026
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| Based in | IL
| Not given
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| Pricing model | Contact for pricing
| Free trial
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| Pricing | Not given
| Free 12 week pilot for card issuing platforms
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| Key features | - Forward-Deployed Researchers provide end-to-end model training and optimization
- Custom evaluation suite development from real tasks
- Production-ready deployment with cost-quality trade-offs
- Deployment flexibility including on-premises and VPC options
- Data security with no retention and full traceability
- Continuous model improvement from production traffic
- Customer ownership of model weights and training recipes
| - Passkey-signed spend mandates with purpose, budget, merchants, and time windows
- Real-time authorization decisions with sub-1 second response time at p99
- Human challenge via passkey step-up for exceptional spend
- Fail-closed payment processing if no decision arrives in time
- Hash-chained evidence ledger with tamper-evident records
- Exportable evidence packs for chargebacks and audits
- Supports card, wallet, x402 and stablecoin payment rails
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| What makes it different | - Customers own specialized models trained on proprietary data, not rented general-purpose models
- Achieve frontier-level quality at lower costs through specialized training
- Five years of experience with diverse post-training and optimization methods
- Models ship production-ready in weeks with ongoing improvement capability
- Secure deployment with no data retention and auditable access controls
| - Human-approved mandates enforce intent, not just static limits or merchant category blocks
- Operates outside the agent in the issuer's authorization path, preventing agent bypass or override
- Creates tamper-evident audit trail linked to agent identity, run, and policy version
- Never holds funds or issues cards; integrates with existing issuer infrastructure
- Single mandate and policy core across multiple payment rails and issuers
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 75 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 22 | 0 |
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| Citation Flow (Majestic) | 44 | 0 |
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| Referring domains (Majestic) | 3529 | 0 |
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5 details filled in for both companies.
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