Mnemosyne alternatives

Tools that do what Mnemosyne does, found by what they say they do rather than by shelf. Among the equally alike, the most used come first. Each line says how it differs from Mnemosyne.

Read 2026-10-21

With a free plan or free to use: Mem0, PMB, Agentmemory, Memvid, CogniMemo, CMEM Cloud, Memori, CognitivX.

10 alternativesUnlike Mnemosyne

#1
Mem0 Developer tools MCP · sign-in
Stores and retrieves persistent memories of users and sessions for AI agents and applications through an API and open-source SDK.
Free plan
16.8k
Active
From $19/mo
2023
#2
PMB Developer tools
Stores decisions and lessons in local SQLite, recalled by AI coding agents through MCP before they respond.
Free planAlso: Agents
63 linking domains
Open source
#3
Agentmemory Developer tools
Stores and retrieves persistent memory for AI coding agents without external databases.
Free plan
67
Active
Open source
#4
HelixDB Developer tools
Stores graph, vector, and temporal data in one database for AI agents and retrieval-augmented generation.
Also: Vector databaseCan run on your servers
90
Active
From $5/mo
#5
Memvid Developer tools
Stores and retrieves knowledge in a single portable file for AI agents and search.
Free planAlso: RAG
792
Maintained
Open source
#6
CogniMemo Developer tools
Provides persistent, queryable memory storage for AI agents with typed recall and semantic search.
Free planCan run on your servers
50 linking domains
Maintained
From $29/mo
#7
CMEM Cloud Agents
Stores and syncs agent observations and decisions across tools via a private MCP endpoint with vector search recall.
Free planCan run on your servers
953
Active
From $30/mo
#8
Memori Developer tools
Captures agent conversations and queries into structured persistent memory for retrieval without full context.
Free planAlso: Agents, RAG
358
Active
Free plan
#9
CognitivX Developer tools
Provides persistent evolving memory and reasoning layer for AI agents and applications.
Free plan
6
Maintained
From $20/mo
#10
Microsoft Developer tools
Sells Windows, Microsoft 365 and Azure cloud services, plus Surface devices and Xbox consoles.
More widely used
135M
Active
1975

← Mnemosyne: the full card All Developer tools tools →

How this list is made: the words Mnemosyne is described with (what it does, for whom, what it is used for) are matched against every tool in the Atlas. A tool on the same shelf, or doing the same kind of work, counts for a little more. Nothing here is paid for.