Every meeting, deal, email and document becomes one cited answer — not ten search results. A brain that compounds while you sleep, on infrastructure you control. Subsumio for law firms is live; more verticals are coming.
97.9%
Recall@5 on BrainBench
+31.4
P@5 points vs. vector-only RAG
146k
pages in the largest production brain
0
leaks in multi-tenant fuzz testing
Engine benchmarks from the retrieval core that powers Sigmabrain.
Sigma Superbrain
Most AI tools answer one prompt. Sigmabrain builds a durable, permission-aware brain over your own work: files, messages, meetings, entities, decisions and open loops.
Answers come from your matters, clients, deals and documents, not generic web guesses.
People, companies, files, deadlines and promises stay connected as reusable context.
Every synthesis keeps source trails visible, with gaps called out instead of hidden.
Self-hosted on your keys and hardware, or managed EU cloud when you want speed.
Workflow view
Meetings, emails, PDFs and tasks flow into a permission-aware brain. Sigmabrain links the context, keeps the source trail visible, and routes the next action to the right workspace.
3 material changes found. Two are low risk, one needs review before the next deadline.
Bring files in via upload, Google Drive or your practice software — then ask in chat, with page-level sources.
ChatGPT answers questions. Sigmabrain answers questions about YOUR firm — with sources, gaps and a knowledge graph that wires itself.
Synthesized, cited prose across people, companies, deals and ideas — plus what the brain doesn't know yet. ChatGPT hallucinates; Sigmabrain cites.
Typed edges (invested_in, works_at, advises) extracted on every write. No extra LLM calls. ChatGPT has no graph.
Vector + BM25 + graph traversal, fused. Finds what either method alone misses — across YOUR documents.
A 24/7 background agent dedupes, fixes citations, surfaces contradictions and preps your morning. ChatGPT forgets overnight; Sigmabrain gets sharper.
Self-host on your hardware, or pick our EU cloud. ChatGPT trains on your chats; Sigmabrain never trains on your data.
Per-user scoped access across every read path. Fuzz-tested for zero cross-user leaks. ChatGPT has no access control.
Meetings, emails, PDFs, notes. Sigmabrain chunks, embeds and indexes automatically.
People, companies and relationships become a graph — while you sleep, the Dream Cycle keeps it clean.
Plain-language questions. Synthesized answers with sources and explicit gaps.
One platform, a dedicated brain for each industry. Subsumio for law firms is live — the rest are coming.
DATEV knows the numbers. The brain knows the why — advisory history, client context, open items, deadlines.
Coming soonWho invested in what? What's open with this founder? Walk into every meeting prepared.
Coming soonPitch history, project learnings, client context — new hires productive in days.
Coming soonWho fits the brief, who can intro you — a proprietary talent graph that compounds.
Coming soonIllustrative scenarios based on what the engine does in production.
An investor
Uploads deal memos and meeting notes, then asks: "What's still open with the founders I met this week?" — one answer, every commitment listed, sources linked.
A lawyer
Sends a voice note and a PDF by WhatsApp with a matter reference, books 20 minutes, then asks: "Where do the opposing party's statements contradict each other?" — the file, time and answer are in one brain.
A consulting team
Indexes five years of decks and project docs. A new hire asks: "Have we solved something like this before?" — and finds the 2023 playbook in seconds.
All use LLMs. Only one knows your firm.
ChatGPT
Forgets everything when you close the chat. No persistent knowledge of your firm.
Codex
No persistent memory. Code sessions are discarded.
Sigmabrain
Every conversation feeds the brain. Knowledge compounds across meetings, deals and documents.
ChatGPT
Trains on your chats by default. Your data lives on US servers.
Codex
Trains on your inputs. Code lives on US servers.
Sigmabrain
Never trains on your data. Self-host or EU cloud. Your knowledge is yours alone.
ChatGPT
Hallucinates sources. No way to verify where an answer came from.
Codex
No source attribution on code suggestions.
Sigmabrain
Every claim cites its source page. One click to verify before you rely on it.
ChatGPT
Sleeps. Wakes up exactly as smart (or dumb) as yesterday.
Codex
Sleeps. No background processing.
Sigmabrain
Dream Cycle runs 24/7: dedupes, fixes citations, surfaces contradictions, preps your morning brief.
ChatGPT
Web-only. No offline mode. No native desktop app.
Codex
Web-only. No offline capability.
Sigmabrain
Native Tauri desktop app with embedded engine. Works offline. Syncs when you're back online.
ChatGPT
No team access control. No per-user scoping. No matter isolation.
Codex
No access control. No team scoping.
Sigmabrain
Per-user scoped access across every read path. Fuzz-tested. Zero cross-user leaks.
Sigmabrain is built for professions where confidentiality is law, not preference.
Your hardware or EU hosting with a DPA. Client data never leaves the EU.
Your knowledge never trains shared models. Ever.
Page-level citations — verify in one click before anything goes into a brief.
Architecture for confidentiality holders — no third party processes client data.
Per seat, billed annually. Your company's brain on infrastructure you control — EU-hosted or on-premise.
Pro
For the professional who lives on their knowledge.
Annual billing −20 %. Included AI query and storage quotas shown per plan. Overages billed at transparent per-unit rates at month end — no surprise bills, no silent throttling.
ChatGPT is a chatbot that starts at zero every conversation. Sigmabrain is a brain that knows your firm. It reads your documents, builds a knowledge graph, cites its sources and tells you what it doesn't know. Every conversation makes it smarter — and it runs on infrastructure you control.
Those return documents or chunks. Sigmabrain returns a synthesized answer with citations, walks a typed knowledge graph for relationship questions ("who invested in X?"), and tells you what it doesn't know — the gap analysis is the part that changes how you work.
Your choice. Self-host the engine on your own hardware, or use our managed EU cloud. Enterprise plans support on-prem and a signed DPA. Unlike ChatGPT, your data never trains anyone's model.
No. Sign up and your brain runs — fully managed, no keys, no infrastructure. Enterprise self-hosting runs on your own hardware with your own keys.
You see usage live in the dashboard and we ask before anything changes. No surprise bills, no silent throttling.
Never. Your knowledge is yours alone — never used to train shared models. Self-hosted, nothing leaves your building; on our EU cloud it stays encrypted and isolated per customer. This is the single biggest difference from ChatGPT.
Three minutes to first answer on hosted plans. No credit card.