Mem0 is popular but expensive and cloud-only. Here are the best open-source alternatives with free tiers and local-first privacy.
Mem0's Pro plan starts at $249/mo with no self-hosted option. Several open-source alternatives offer comparable features with free tiers.
Squish (local-first, free, MCP-native), Zep (graph memory), Letta (stateful agents), and Engram (ultra-lightweight) each solve agent memory differently.
Prioritize local-first if privacy matters. Choose MCP-native if you want plug-and-play integration. Pick based on your stack and team size.