Browser-agent memory
8 systems in the browser-agent memory category of the AI Agent Infrastructure Landscape, grouped by maturity tier.
Tier 1 — battle-tested (5)
- Browserbase Programmatic session persistence (dev infra)
Cloud browser infrastructure for AI agents. Headless Chromium sessions with persistent cookies, localStorage, session recording — agent workflows carry state across runs. Memory at the session/automation tier rather than conversational.
- Dia (Atlassian) Local-first browser-history + @history queries
The Browser Company's AI-native browser; acquired by Atlassian for $610M (Sept 2025). Stores summaries and preferences locally; opt-in @history feature references up to 7 days of browsing as context. History/chats/bookmarks encrypted loc…
- Fellou Spatial agentic browser + Agentic Memory
Silicon Valley. Spatial agentic browser with explicit Agentic Memory layer learning from history and notes for instant recall of past research sessions. Operates on logged-in accounts (Quora, X, etc.); runs tasks while user is idle.
- Microsoft Edge Copilot Mode + Journeys Tab-context + Journeys session-grouping
Copilot Mode (Oct 2025): Journeys groups related browsing across sessions into resumable project cards with AI summaries. Copilot Actions execute multi-step tasks inside the browser. Assistant can see all open tabs with permission and dr…
- Perplexity Comet Conversation across pages + browser-history memory
AI-native Chromium-based browser. Assistant operates across tabs and sessions; persistent memory of preferences; multi-step agentic tasks without leaving the browser. Memory is opt-in and server-side; enterprise memory tier separately av…
Tier 2 — production-ready (3)
- Brave Leo User-curated local-only memory
Privacy-focused integrated assistant. Memory is user-curated: explicit facts and preferences persist across all sessions, stored locally with no server retention. Agentic browsing experiment (Brave Nightly Dec 2025) takes multi-step acti…
- Opera AI (formerly Aria) User-declared preferences + tab management
Memory feature stores user-declared preferences and facts; injected into future prompts. Understands current tab content; manages open tabs contextually. Memory off by default, end-user controlled, stored alongside the prompt rather than…
- Sigma (Private AI Browser) Fully-local LLM browser memory
Standalone browser with fully on-device LLM. Agent acts inside websites (logging in, clicking, completing tasks); memory-based actions recall past searches to auto-fill similar tasks with no cloud dependency. Functions fully offline.