Feature Comparison
| Feature | Epitomerecommended | Supermemory | Vertex AI RAG |
|---|---|---|---|
Architecture | |||
| Self-hostable | |||
| Open source | MIT | MIT | |
| Data storage | PostgreSQL + pgvector | SQLite + vectors | Google Cloud Storage |
| Per-user isolation | Schema-level | User-level | Project-level |
Memory Model | |||
| Structured profile | |||
| Confidence scoring | |||
| Memory lifecycle | Promote / demote / decay | Save / delete | Index / remove |
| Semantic search | |||
| Contradiction detection | |||
Knowledge Graph | |||
| Entity extraction | 3 methods (LLM + NER + pattern) | ||
| Typed relationships | |||
| Graph traversal queries | Recursive CTE | ||
| Entity deduplication | |||
Privacy & Control | |||
| Consent system | Per-tool granular | IAM roles | |
| Audit logging | |||
| Data export | Full SQL dump | JSON export | GCS bucket |
| GDPR compliance | Limited | ||
Agent Support | |||
| MCP protocol | 9 tools, Streamable HTTP | ||
| Multi-agent memory | Limited | ||
| Context budget ranking | |||
| Memory router (LLM proxy) | |||
Developer Experience | |||
| REST API | |||
| JavaScript SDK | Python only | ||
| Dashboard UI | Full React SPA | Browser extension | GCP Console |
| Graph visualization | D3.js interactive | ||
Pricing | |||
| Free tier | Unlimited (self-host) | Unlimited (self-host) | GCP free tier |
| Hosted pricing | From $0/mo | From $10/mo | Pay-per-query |
| Vendor lock-in | None | Low | Google Cloud |
Self-hostable
Open source
Data storage
Per-user isolation
Structured profile
Confidence scoring
Memory lifecycle
Semantic search
Contradiction detection
Entity extraction
Typed relationships
Graph traversal queries
Entity deduplication
Consent system
Audit logging
Data export
GDPR compliance
MCP protocol
Multi-agent memory
Context budget ranking
Memory router (LLM proxy)
REST API
JavaScript SDK
Dashboard UI
Graph visualization
Free tier
Hosted pricing
Vendor lock-in
Deep Dive
Epitome is purpose-built for AI agents — structured profiles, semantic memory, and a knowledge graph that agents query directly. Supermemory focuses on saving bookmarks and web content for personal reference. Different tools for different jobs.
Epitome speaks MCP natively with 9 specialized tools over Streamable HTTP transport. Supermemory exposes a REST API. MCP means any compatible AI agent can discover and use Epitome's capabilities automatically.
Epitome's promote/demote state machine, contradiction detection, and nightly decay create a self-curating memory system. Supermemory stores what you save, as-is. Quality scoring means your AI context stays clean and trustworthy over time.
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