OpenAI conversation state alternatives, graded
thecontinuitylayer.com/alternatives/openai-conversation-state13 of the 13 memory systems on the record score higher than OpenAI conversation state's 3 of 8 (grade D): Mem0 (7½, A), LangMem and LangGraph Store (7½, A), MemOS (7, A−) lead the ranking. Every grade is read from the maker's own page, checked 3 November 2026, never from a review.
Every memory system on the record, ranked
OpenAI conversation state’s own row is shaded. The five columns are the tests a person switching asks about first; each product page has every test, with the maker’s line and the source.
| memory system | Grade | Open source | Self-host | Export | Any model | Delete |
|---|---|---|---|---|---|---|
| Mem0#1 · Mem0 | A7½/8 | |||||
| LangMem and LangGraph Store#2 · LangChain | A7½/8 | |||||
| MemOS#3 · MemTensor | A−7/8 | |||||
| Letta#4 · Letta (formerly MemGPT) | B+6½/8 | |||||
| Cognee#5 · Cognee | B+6½/8 | |||||
| Honcho#6 · Plastic Labs | B+6½/8 | |||||
| Zep Cloud#7 · Zep | B6/8 | |||||
| Supermemory#8 · Supermemory | B6/8 | |||||
| Memobase#9 · memodb-io | B−5½/8 | |||||
| Claude memory tool#10 · Anthropic | C4½/8 | |||||
| Graphiti#11 · Zep | C4½/8 | |||||
| Agent Framework memory#12 · Microsoft | C−4/8 | |||||
| Agent Engine Memory Bank#13 · Google Cloud | D3½/8 | |||||
| OpenAI conversation state#14 · OpenAI · this one | D3/8 |
- Open source · Is it open source?
- Self-host · Can you run it yourself?
- Export · Can you take your memory out of it?
- Any model · Does it work with more than one model provider?
- Delete · Can you delete a user's memories from it?
OpenAI conversation state alternatives, by what matters
9 memory systems that are open source
- A Mem0
- A LangMem and LangGraph Store
- A− MemOS
- B+ Letta
- B+ Cognee
- B+ Honcho
- B− Memobase
- C Graphiti
- C− Agent Framework memory
OpenAI conversation state's grade on this test: no.
10 memory systems you can run yourself
- A Mem0
- A LangMem and LangGraph Store
- A− MemOS
- B+ Letta
- B+ Cognee
- B+ Honcho
- B Supermemory
- B− Memobase
- C Graphiti
- C− Agent Framework memory
OpenAI conversation state's grade on this test: no.
4 memory systems that let you take your memory out
OpenAI conversation state's grade on this test: partly.
8 memory systems that work with more than one model provider
OpenAI conversation state's grade on this test: no.
What OpenAI changed lately
From December 2026, ChatGPT and Codex draw from one shared usage allowance on Plus, Pro and Business plans, measured in tokens; Instant chat does not count against it. People who hit the limit wait for the reset, upgrade, or buy credits. No token figures are published.
sourceExisting $200 ChatGPT Pro subscribers move to the lower usage allowance that new Pro 200 subscriptions get, at the same $200 price, after keeping the old allowance through October 29. A new Pro 500 plan has the highest included usage; see OpenAI's pricing page.
sourceChatGPT removed the fixed cap on how many Sites Plus and Pro users can create. Usage and storage limits still apply.
source
Alternatives to the others
- Mem0 alternatives
- LangMem and LangGraph Store alternatives
- MemOS alternatives
- Letta alternatives
- Cognee alternatives
- Honcho alternatives
- Zep Cloud alternatives
- Supermemory alternatives
- Memobase alternatives
- Claude memory tool alternatives
- Graphiti alternatives
- Agent Framework memory alternatives
- Agent Engine Memory Bank alternatives
The whole shelf: Memory systems. How the grades are made: How we grade. No maker pays for a place or a grade.