Opera AI (formerly Aria)
https://blogs.opera.com/news/2025/02/aria-gets-memory-feature-new-ai-feature-drop/
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 the LLM.
At a glance
- Type
- User-declared preferences + tab management
- Tier
- T2
- Section
- Browser-agent memory
- Created
- searched not found
- Latest release
- not applicable — not OSS
- License
- not applicable — not OSS
- GitHub
- not applicable — no GitHub repo
- Pricing
- Free (included with Opera browser); Opera One Pro has additional AI credits
- Funding
- Opera public (OPRA on NASDAQ); founded 1995; market cap ~$1.5B
Taxonomy
- storage
- kv
- retrieval
- injection
- persistence
- long-term
- update
- overwrite
- unit
- fact
- governance
- user-controllable
- conflict
- none
When to use
Optimised for: user-declared preferences + tab management
Anti-fit: not for enterprise programmatic use
Pros & cons
Pros
Memory layered into a long-running browser brand with strong gaming + creator audience.
Cons
Opera-browser-only; smaller AI mind-share than Edge or Comet.
Claims & capabilities
Opera browser ~350M users globally. Memory feature shipped in Opera Developer Feb 2025.
Technical surface
- API surface
- not applicable — browser feature
- Backend storage
- custom
- Deployment
- Managed-only (Opera browser)
- Embedding model
- locked
- Multi-tenancy
- not applicable — single-user
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- searched not found
Similar systems
Other browser-agent memory in the catalog, ranked by inbound references.
- Brave Leo T2
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 actions inside sites referencing those preferences.
- Browserbase T1
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) T1
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 local-first.
- Fellou T1
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 T1
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 draws on history.
- Perplexity Comet T1
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 available.