{"id":"sigma-private-ai-browser--sigmabrowser-com","name":"Sigma (Private AI Browser)","url":"https://www.sigmabrowser.com/","page":"https://mrpeppersdev.github.io/agent-infrastructure-landscape/systems/sigma-private-ai-browser--sigmabrowser-com","family":"memory","section":"Browser-agent memory","sections":["Browser-agent memory"],"tier":2,"last_verified_at":"2026-10-22","lifecycle":{"status":"active","severity":0,"note":null},"taxonomy":{"storage":[{"value":"vector","primary":true,"reason":null},{"value":"file","primary":false,"reason":null}],"retrieval":[{"value":"similarity","primary":true,"reason":null}],"persistence":[{"value":"long-term","primary":true,"reason":null}],"update":[{"value":"append-only","primary":true,"reason":null}],"unit":[{"value":"episode","primary":true,"reason":null},{"value":"document","primary":false,"reason":null}],"governance":[{"value":"user-controllable","primary":true,"reason":null}],"conflict":[{"value":"none","primary":true,"reason":"none specified"}]},"cells":{"type":{"value":"Fully-local LLM browser memory","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"desc":{"value":"Chromium-based browser with AI agent (navigates pages, fills forms), chat-with-page, deep research and an in-browser local LLM (Eclipse) for private on-device processing; macOS, Windows, iOS, Android beta.","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"claims":{"value":"$4.1M raised (YC + LocalGlobe + 8VC + First Round + Khosla). 50k+ users early 2026; 33% MoM growth. Offline AI sessions 3% → 12% Dec 2025-Mar 2026.","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"modalities":{"value":"text","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"created":{"value":"searched not found","citation":"https://www.newswire.com/news/sigma-launches-the-first-private-ai-browser-with-cloudless-llm-22695605","status":"depth-floor-reached","tier":"T2","last_verified_at":"2026-05-12","source_class":"third-party"},"latest-release":{"value":"not applicable — not OSS","citation":null,"status":"not-applicable","tier":"T3","last_verified_at":"2026-05-06"},"license":{"value":"not applicable — not OSS","citation":null,"status":"not-applicable","tier":"T3"},"gh":{"value":"not applicable — no GitHub repo","citation":null,"status":"not-applicable","tier":"T3","last_verified_at":"2026-05-06"},"mindshare":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","last_verified_at":"2026-05-12","source_class":"vendor"},"citations":{"value":"not applicable — not academic","citation":null,"status":"not-applicable","tier":"T3","last_verified_at":"2026-05-06"},"funding":{"value":"searched not found — prior $4M SigmaOS seed (2022) belongs to a different company (SigmaOS, YC/San Francisco); Sigma Browser is Sigma Browser OÜ, Tallinn","citation":"https://siliconangle.com/2025/12/22/sigma-launches-privacy-focused-ai-native-browser-local-llm/","status":"real-data","tier":"T2","last_verified_at":"2026-10-22","source_class":"third-party"},"customers":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"pricing":{"value":"Free $0; Plus $10/mo ($8 annual); Pro $75/mo ($60 annual)","citation":"https://www.sigmabrowser.com/plans","status":"real-data","tier":"T2","source_class":"vendor"},"compliance":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"data-handling":{"value":"Fully on-device; no cloud processing; no telemetry; memory-based actions stay local; functions fully offline","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"deployment":{"value":"Managed-only (browser app install)","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"hq":{"value":"San Francisco, CA, US","citation":"https://startupintros.com/orgs/sigmaos","status":"real-data","tier":"T2","source_class":"third-party"},"founders":{"value":"Nick Trenkler (co-founder); Alex Shapiro (CSO); Mahyad Ghassemi (founding CEO mentioned in YC/TechCrunch 2022)","citation":"https://techcrunch.com/2024/03/26/yc-backed-sigmaos-browser-turns-to-ai-powered-features-for-monetization/","status":"real-data","tier":"T2","source_class":"third-party"},"volume":{"value":"no scale claim","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"perf":{"value":"no public benchmark scores found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"repro":{"value":"not applicable — not a research paper","citation":null,"status":"not-applicable","tier":"T3"},"code-release":{"value":"not applicable — not a research paper","citation":null,"status":"not-applicable","tier":"T3"},"api-surface":{"value":"not applicable — consumer browser","citation":null,"status":"not-applicable","tier":"T3"},"latency":{"value":"not applicable — consumer browser","citation":null,"status":"not-applicable","tier":"T3"},"throughput":{"value":"not applicable — consumer browser","citation":null,"status":"not-applicable","tier":"T3"},"backend-storage":{"value":"custom (local)","citation":"https://sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"multi-tenancy":{"value":"not applicable — single-user","citation":null,"status":"not-applicable","tier":"T3"},"encryption":{"value":"at-rest + in-transit","citation":"https://sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"sso-rbac":{"value":"not applicable — consumer","citation":null,"status":"not-applicable","tier":"T3"},"embedding-model":{"value":"locked","citation":"https://sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"consistency":{"value":"not specified - vendor docs do not address this dimension","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"versioning":{"value":"immutable append-log","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"tombstoning":{"value":"append-only no delete","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"schema-evolution":{"value":"free-form / no schema","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"namespace":{"value":"hierarchical","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"contradiction":{"value":"always append (no resolution)","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"forgetting":{"value":"user-controlled forget","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"mcp-support":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"a2a-support":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"otel":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"webhooks":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"import-export":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"integration-count":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"orchestration":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"programmatic-control":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"vendor-benchmarks":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3","last_verified_at":"2026-05-06"},"pricing-specifics":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"agent-abstraction":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"memory-primitives":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"llm-lock":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"runtimes":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"session-handling":{"value":"not applicable — wrong section","citation":null,"status":"not-applicable","tier":"T3"},"validated-verticals":{"value":"consumer / individual (privacy-focused)","citation":"https://sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"time-to-running":{"value":"<10min (download Sigma)","citation":"https://sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"anti-fit":{"value":"not for cloud-LLM-required workloads (on-device only)","citation":"https://sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"optimised-for":{"value":"fully-local LLM browser memory","citation":"https://sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"adjacent-infrastructure":{"value":"self-contained Sigma + local model","citation":"https://sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"pros":{"value":"Privacy-positioned browser-as-agent with strong stance on no telemetry / no cross-site memory.","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"cons":{"value":"Newer entrant with small user base; sustainability depends on monetization clarity.","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"links":{"value":"sigmabrowser.com","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"obs-langsmith":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"obs-opentelemetry":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"obs-datadog":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"obs-helicone":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"obs-weave":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"obs-langfuse":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"obs-arize":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"obs-custom":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"cost-token-budget":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"cost-prompt-caching":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"cost-semantic-caching":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"cost-batching":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"cost-model-routing":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"cost-streaming-only":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"cost-observability-cost-attribution":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"eval-langsmith-evals":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"eval-braintrust":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"eval-weights-and-biases-agent":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"eval-helicone-evals":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"eval-custom-test-harness":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"eval-human-loop":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"eval-production-traffic-replay":{"value":"","citation":null,"status":"no-data","tier":"T3","last_verified_at":"2026-05-14"},"commit-trajectory":{"value":"not applicable — no GitHub repo","citation":null,"status":"not-applicable","tier":"T3","last_verified_at":"2026-05-14"},"citation-trajectory":{"value":"not applicable — non-paper row","citation":null,"status":"not-applicable","tier":"T3","last_verified_at":"2026-05-14"},"download-trajectory":{"value":"not applicable — not published as a package","citation":null,"status":"not-applicable","tier":"T3","last_verified_at":"2026-05-14"},"cost-input-usd-per-mtok":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"cost-output-usd-per-mtok":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"cost-tier":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"cost-pricing-model":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"cost-last-verified":{"value":"searched not found","citation":"https://www.sigmabrowser.com/","status":"depth-floor-reached","tier":"T2","source_class":"vendor"},"capability-composite-score":{"value":"42","citation":null,"status":"estimate","tier":"T3"},"capability-band":{"value":"competent","citation":null,"status":"estimate","tier":"T3"},"capability-benchmark-sources":{"value":"general capability estimate — no specific benchmark recalled","citation":null,"status":"estimate","tier":"T3"},"capability-last-verified":{"value":"2026-06-29","citation":null,"status":"estimate","tier":"T3"},"use-case-tags":{"value":"scoped-agentic, offline-capable, memory-augmented-chat, latency-sensitive","citation":null,"status":"estimate","tier":"T3"},"use-case-anti-tags":{"value":"code-generation-focused, multi-agent-coordination","citation":null,"status":"estimate","tier":"T3"},"adoption-accelerator":{"value":"","citation":null,"status":"no-data","tier":"T3"},"architecture-deployment-locus":{"value":"computer-use","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"licensing-bucket":{"value":"commercial","citation":"https://www.sigmabrowser.com/plans","status":"real-data","tier":"T2","source_class":"vendor"},"positioning-platform-vs-product":{"value":"product","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"taxonomy-three-layer-rollup":{"value":"agent-infra","citation":"https://github.com/MrPeppersDev/agent-infrastructure-landscape/blob/main/docs/schema/section-to-three-layer-rollup.json","status":"real-data","tier":"T1","source_class":"repo"},"developer-activity-opendigger":{"value":"","citation":null,"status":"no-data","tier":"T3"},"freshness-date":{"value":"2026-10-22","citation":"https://mrpeppersdev.github.io/agent-infrastructure-landscape/systems/sigma-private-ai-browser--sigmabrowser-com","status":"real-data","tier":"T2","source_class":"catalog"},"compliance-certifications":{"value":"ccpa,gdpr","citation":"https://www.sigmabrowser.com/","status":"real-data","tier":"T2","source_class":"vendor"},"sdk-languages":{"value":"","citation":null,"status":"no-data","tier":"T3"},"protocol-support":{"value":"","citation":null,"status":"no-data","tier":"T3"},"maturity":{"value":"","citation":null,"status":"no-data","tier":"T3"}},"corroboration":{"cited_cells":33,"third_party_cells":3},"edges":{"outgoing":[],"incoming":[]},"history":[{"date":"2026-10-22","commit":"d1f77cf661","pr":219,"kind":"update","changes":[{"field":"pricing","label":"Pricing","from":"","to":"Free $0; Plus $10/mo ($8 annual); Pro $75/mo ($60 annual)","first":true,"source":"https://www.sigmabrowser.com/plans"},{"field":"funding","label":"Funding / ownership","from":"$4.1M total raised: $4M seed (Nov 2022 led by LocalGlobe + YC); additional ~$0.1M angels","to":"searched not found — prior $4M SigmaOS seed (2022) belongs to a different company (SigmaOS, YC/San Francisco); Sigma Browser is Sigma Browser OÜ, Tallinn","source":"https://siliconangle.com/2025/12/22/sigma-launches-privacy-focused-ai-native-browser-local-llm/"}]}],"license":"CC-BY-4.0","source":"https://github.com/MrPeppersDev/agent-infrastructure-landscape/blob/main/data/landscape.json"}