Brave Leo
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.
Active · Verified 2026-10-22 · fresh as of 2026-10-22 · 39 cited facts, 1 with a third-party source · Suggest a correction
At a glance
- Type
- User-curated local-only memory vendor fix
- Tier
- T2
- Section
- Browser-agent memory
- Created
- searched not found fix
- Latest release
- not applicable — not OSS fix
- License
- not applicable — not OSS fix
- GitHub
- not applicable — no GitHub repo fix
- Pricing
- Free + paid vendor fix
- Funding
- Brave Software $316.6M total raised; $980M valuation (Series A-7 Feb 2022 led by Page One Ventures) third-party fix
- Freshness
- 2026-10-22 fix
- Layer
- agent-infra repo fix
- Licensing
- commercial vendor fix
Memory taxonomy
- storage
- file
- retrieval
- injection
- persistence
- long-term
- update
- user-controllable
- unit
- fact
- governance
- user-controllable
- conflict
- none
When to use
Optimised for: privacy / user-curated local-only memory
Anti-fit: not for enterprise programmatic use
Pros & cons
Pros
Privacy-first browser AI with memory bounded by Brave's no-tracking commitment; on-device model option.
Cons
Brave-browser-only; smaller user base than Edge / Chrome; AI features lag market leaders.
Claims & capabilities
Brave browser ~80M MAU.
Technical surface
- API surface
- not applicable — browser feature
- Backend storage
- not applicable — stateless by design
- Deployment
- Managed-only
- Embedding model
- locked
- Multi-tenancy
- not applicable — single-user
- MCP
- searched not found — Leo focuses on browser-local context, no MCP surfaced
- A2A
- searched not found
- OpenTelemetry
- searched not found
Alternatives to Brave Leo → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other browser-agent memory in the catalog, ranked by inbound references.
- 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; Atlassian acquired The Browser Company for $610M cash (announced 2025-09, closed 2025-10-21). 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 (now Copilot in Edge) T1
Copilot Mode retired 2026-05-13; its features now ship as Copilot in Edge. Journeys clusters browsing history into topic cards on the new tab page (desktop, and US mobile); Copilot long-term memory can reference past chats and browsing history with user controls; agentic 'Browse with Copilot' (formerly Copilot Actions) for US Microsoft 365 Premium.
- Opera AI (formerly Aria) T2
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.
- 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.
Sources (38 cited facts, 1 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is User-curated local-only memory vendor
- What it does & what's distinct Privacy-focused integrated assistant. Memory is user-curated: explicit facts and prefere… vendor
- Claims / benefits Brave browser ~80M MAU. vendor
- Modalities text vendor
- Funding Brave Software $316.6M total raised; $980M valuation (Series A-7 Feb 2022 led by Page On… third-party
- Customers / scale 201-500 ppl ~80M MAU on Brave browser, no named enterprise vendor
- Pricing Free + paid vendor
- Compliance Privacy-first architecture; TEE-based (Intel TDX + Nvidia TEE via Near AI); no formal SO… vendor
- Deployment Managed-only vendor
- HQ US vendor
- Founders / pedigree Brendan Eich (CEO; creator of JavaScript; co-founder of Mozilla) and Brian Bondy (CTO; e… vendor
- Memory volume / scale no scale claim vendor
- Encryption at-rest + in-transit vendor
- Embedding model locked vendor
- Consistency strong vendor
- Versioning snapshots vendor
- Tombstoning hard-delete supported vendor
- Schema evolution free-form / no schema vendor
- Namespace primitives hierarchical vendor
- Forgetting policy user-controlled forget vendor
- MCP support searched not found — Leo focuses on browser-local context, no MCP surfaced vendor
- Validated verticals consumer / individual (privacy-focused) vendor
- Time to running <10min (Brave browser) vendor
- Anti-fit not for enterprise programmatic use vendor
- Optimised for privacy / user-curated local-only memory vendor
- Adjacent infrastructure self-contained Brave vendor
- Pros Privacy-first browser AI with memory bounded by Brave's no-tracking commitment; on-devic… vendor
- Cons Brave-browser-only; smaller user base than Edge / Chrome; AI features lag market leaders. vendor
- Project & sources brave.com/leo vendor
- cost-input-usd-per-mtok 0 vendor
- cost-output-usd-per-mtok 0 vendor
- cost-tier free vendor
- cost-pricing-model free-tier vendor
- cost-last-verified 2026-06-29 vendor
- architecture-deployment-locus hybrid vendor
- licensing-bucket commercial vendor
- positioning-platform-vs-product product vendor
- taxonomy-three-layer-rollup agent-infra repo