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MemoryPlastic Labs

Honcho

Continual learning memory for stateful agents. Better context, fewer tokens.

Categories
MemoryAgent
Pricing
FREEMIUM
Source
Open core
Hosting
Hybrid
Platforms
APICLI
Models
Model-agnostic
Verified
Jun 8, 2026

A memory and user-personalization layer for AI agents that keeps reasoning about each user across sessions, so apps get richer context without stuffing whole histories into the prompt. It models peers and sessions, runs background inference to derive durable facts, and answers natural-language questions about a user at query time. Available as a managed API or self-hosted FastAPI server, with Python and TypeScript SDKs.

Capabilities 1

What it actually does — grouped by capability family.

  • Agent memory (primary capability)

Pros & cons

  • Open-source memory infrastructure
  • Peer model for human/agent/idea memory
  • Reasoning-first, derives durable facts
  • Strong long-memory benchmark scores
  • Managed API or self-hosted FastAPI
  • Young, evolving ecosystem
  • Self-host stack (Postgres/Redis) to run
  • Background inference adds LLM cost
  • Smaller community than incumbents

Tags

View all Memory
  • View mem0 details
    MemoryFREEMIUMOpen core

    mem0

    Mem0

    Long-term memory layer for AI agents. Self-hostable.

    Persistent memory store + retrieval pipeline for agent applications. Handles per-user/per-session/per-agent scope cleanly; pairs with OpenAI, Anthropic, and local models.

    Quick to adopt, broad framework integrations
    Weaker on temporal/state-change queries
    • memory
    • agents
    • rag
    • self-hosted
  • View Zep details
    MemoryFREEMIUM

    Zep

    Zep

    Temporal knowledge-graph memory for AI agents.

    Memory layer that gives agents long-term context by building a temporal knowledge graph from chat history and business data, tracking how facts evolve over time. It's powered by Graphiti, Zep's Apache-2.0 open-source temporal graph engine, with Zep Cloud offering a managed, credit-based service on top. Used to keep agent context relevant as conversations and data grow.

    Open-source Graphiti engine (Apache-2.0)
    Graph approach has learning curve
    • memory
    • agents
    • knowledge-graph
    • temporal
    • +1
  • View Letta details
    MemoryFREEMIUMOpen core

    Letta

    Letta

    Stateful agents with structured memory. Successor to MemGPT.

    Open-source framework for building stateful agents — memory blocks, context-window management, tool-use primitives baked in. Useful as a reference architecture for long-running agents.

    Self-editing agent memory
    Developer-focused, not no-code
    • memory
    • stateful
    • agents
    • open-source
  • View Supermemory details
    MemoryFREEMIUMOpen core

    Supermemory

    Supermemory

    Memory API that gives any AI agent long-term recall.

    Supermemory is a memory and context engine for AI apps. It ingests documents, chat histories, and connector data (Drive, Gmail, Notion), turns them into a searchable store, and serves relevant context back to agents over a single API. It works with any model and ships an MCP server alongside official SDKs.

    MIT-licensed, self-host or managed
    Younger project, evolving API
    • agent-memory
    • rag
    • long-term-memory