Alternatives

Zep alternatives in 2026 (Letta / MemGPT, Mem0, Cognee, Anthropic Memory, OpenAI Memory)

Top Zep alternatives in 2026: Letta (formerly MemGPT, OSS agent memory), Mem0 (developer-friendly memory layer), Cognee (graph-based memory), Anthropic Memory (Claude-native), OpenAI Memory (ChatGPT-native).

Why people search this

People look for Zep alternatives because they want OSS (Letta, Mem0, Cognee), provider-native memory (Anthropic, OpenAI), or different abstraction shapes (graph vs facts vs embeddings).

The ranking

#1

Letta (MemGPT)

Best for: OSS agent memory, virtual context management  ·  Price: Free OSS + paid cloud

Open-source agent memory framework with virtual context management. The longest-running OSS option.

#2

Mem0

Best for: Production agent memory with strong DX  ·  Price: Free OSS + paid cloud

Developer-friendly memory layer with embeddings + facts + knowledge graph + multi-level memory.

#3

Cognee

Best for: Graph-based agent memory  ·  Price: Free OSS + paid

Graph-based memory pipeline for AI agents — ECL (extract, cognify, load) framework.

#4

Anthropic Memory (Claude)

Best for: Claude-native stacks  ·  Price: Included in Claude usage

Built-in memory for Claude Projects and apps. Provider-native, simplest path inside Claude.

#5

OpenAI Memory (ChatGPT)

Best for: ChatGPT-native stacks  ·  Price: Included in ChatGPT Plus / API

Built-in memory for ChatGPT. Consumer-shaped, deepest integration with the GPT stack.

FAQ

Best OSS Zep alternative?

Mem0 or Letta — both mature OSS options with different abstraction shapes.

Provider-native memory in 2026?

Anthropic Memory for Claude; OpenAI Memory for ChatGPT — both integrated tightly with their respective providers.

Best for graph-based memory?

Cognee — graph-first agent memory pipeline.

Related

Last updated: 2026-06-01.