AI Index
Platform-native memory
Memory built into the big assistants and clouds: ChatGPT, Claude, Gemini, and the managed agent platforms. 12 entries: 12 commercial.
CommercialChatGPT Memory (Dreaming V3)Google
Enterprise/context features; shipped import later than Anthropic (Feb 2026 window)CommercialKinConsumer personal AI companion with on-device concept-graph and event-based memory, advisors, and journaling
OpenAI
Consumer background memory synthesis; replaces saved-memories listCommercialClaude MemoryAnthropic
Client-side memory tool (memory_20250818) + context editing (~39% accuracy gain, 84% token savings); Managed Agents memory stores; chat m…CommercialCloudflare Agent MemoryCloudflare
Managed agent memory service built on Durable Objects + Vectorize; message storage, memory classification, vector searchCommercialGemini memoryFree tier with advisor, voice, and message limits; optional paid subscription…
CommercialLimitlessLimitless (acquired by Meta)
Pendant wearable that records conversations into a searchable Lifelog with summaries and Ask AI recallUnlimited Plan free for existing Pendant customers since the Meta acquisition…
CommercialMeta AI MemoryMeta
Memory Boost: Meta AI recalls details from 1:1 chats to personalize later answers across Meta appsCommercialMicrosoft 365 Copilot MemoryMicrosoft
Saved memories inferred from Copilot Chat plus Microsoft 365 work insights, used to personalize answersCommercialPerplexity MemoryPerplexity
Cross-conversation memory for Perplexity Search, Computer, and Comet, plus the 'Brain' working context layerIncluded with Pro ($17/month billed annually) and Max ($167/month billed annu…
CommercialUiPath Agent MemoryUiPath
Episodic memory for UiPath Agents (preview, Aug 2026): agents retain and reuse learnings from past executionsCommercialVertex AI Agent EngineGoogle Cloud
Managed agent runtime with context management, session short-term memory, secure code executionCommercialVertex AI Memory BankGoogle Cloud
Managed memory service for ADK agents on Vertex AI