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Perseus Computing vs Living Brain

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 Living Brain
DetailPerseus Computing logo Perseus ComputingLiving Brain logo Living Brain
What it doesHigh-assurance infrastructure for AI agents A persistent and self-learning interoperable memory layer for AI agents and tools.
StageNot given Not given
FoundedNot given Not given
Based inUS Not given
Pricing modelOpen source Freemium
PricingNot given Living Brain API: $8 per 1M input tokens and $0.50 per 1M output tokens, pay as you go with $5 minimum top-up and no monthly minimum. Living Brain Workspace: $99 per month (most popular), includes three team seats, $80 shared monthly credits for first three cycles then $50, managed Brains and agents
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
  • Semantic search and connection discovery
  • Memory scoring and optimization
  • REST API, SDK, CLI and MCP support
  • Document extraction and storage
  • Audio transcription
  • Webhook subscriptions and integrations
  • Slack and Telegram capture
  • Scheduled briefs and page history
  • Markdown export and structured output
  • Multi-brain and team collaboration
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
  • 22.6X fewer tokens per question and 95% lower cost per task vs full context baseline
  • 0% hallucinations on LongMemEval-S evaluation
  • Works across 60+ AI platforms via unified API
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)42 +1 (up) since last check12 +1 (up) since last check
Trust Flow (Majestic)37
Citation Flow (Majestic)2418
Referring domains (Majestic)623

4 details filled in for both companies.

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