Fulcra vs Perseus Computing
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Fulcra compared with Perseus Computing
| Detail | F
Fulcra | 
Perseus Computing |
|---|
| What it does | The user-owned context backend for AI agents
| High-assurance infrastructure for AI agents
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| Stage | Growing
| Not given
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| Founded | Not given
| Not given
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| Based in | US
| US
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| Pricing model | Freemium
| Open source
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| Pricing | Not given
| Not given
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| Key features | - One user-owned context for every agent
- Agents wake up to what changed since their last loop
- Readable, traceable context with every change logged
- End-to-end encryption with AES-256
- Granular sharing controls with revocable access
- Right to export, delete, and transparency
- Context that travels across AI products and models
| - 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
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| What makes it different | - User-owned context that travels with you across AI products
- Traceable agent activity with full visibility and control
- Agents coordinate through shared context without learning being trapped in silos
- End-to-end encryption with no data selling
| - 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
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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) | 37 ▲ +3 (up) since last check | 42 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 20 | 3 |
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| Citation Flow (Majestic) | 40 | 24 |
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| Referring domains (Majestic) | 593 | 62 |
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5 details filled in for both companies.
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