Perseus Computing vs Levee
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Perseus Computing compared with Levee
| Detail | 
Perseus Computing | 
Levee |
|---|
| What it does | High-assurance infrastructure for AI agents
| Authorization layer for AI agent spend with human-approved mandates and tamper-evident proof
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | US
| Not given
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| Pricing model | Open source
| Free trial
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| Pricing | Not given
| Free 12 week pilot for card issuing platforms
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| Key features | - Harpe: chooses what an AI agent reads under a token budget with consistent results
- Kibisis: keeps agent memory on your hardware with AES-256-GCM encryption
- Argus: append-only record that detects edits with cryptographic verification
- No network code by default for local and disconnected use
- MIT License with published code, benchmarks and raw results
| - 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 | - Measured empirical validation across 6,111 questions outperforming full-context models
- Zero plaintext on disk with encrypted vaults matching plaintext accuracy
- 78.3% fewer tokens sent to the model with a 1,200-token budget per turn
- Preserves conversational chronology and relational qualifiers under token budgets
| - 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) | 42 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 3 | 0 |
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| Citation Flow (Majestic) | 24 | 0 |
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| Referring domains (Majestic) | 62 | 0 |
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4 details filled in for both companies.
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