Compiled knowledge, hosted in the EU

Everything you read.
Compiled once.
Remembered for good.

Trail reads every source you give it — Word and Excel files, PDFs, pages, notes, conversations — and compiles it into a connected brain of citable Neurons. Ask anything, from anywhere you work, and get the answer with the sources it came from.

Live compile6 sources · 5 Neurons

Active

PDFBoard minutes Q3
MDProduct spec v4

Extracted

WEBPricing research
DOCXSales playbook

Success

CHATCall with Anna
XLSXQ3 revenue

Your brain

Pricing is per brain, not per seat
2 sourcesupdated
Read onceEvery source is compiled into linked Neurons — never re-read from scratch.
Always citedEvery answer shows the source it came from.
Kept in the EUHosted in Stockholm, answered by EU language models.
You decideNothing in your brain changes without your approval.
Why Trail exists

Knowledge Infrastructure for the AI Era.

Every company is getting AI. Soon every competitor runs the same models — what sets you apart is what your AI knows.

Read about the benefits for your organisation
01

The model is not the advantage. Your knowledge is.

A model without your company’s knowledge gives you the same answer it gives everyone else. The value is in what only you know: your decisions, your customers, your numbers, your history.

02

Today that knowledge is scattered — and leaking into Shadow AI.

It sits in mail, drives, meetings and people’s heads. Every AI tool searches it from scratch, guesses, and rarely says where an answer came from. Meanwhile people paste company knowledge into whatever assistant is on their own phone or laptop — Shadow AI, outside your control, and gone the moment the chat closes.

03

Knowledge should be infrastructure, not an app.

You don’t generate electricity per room. Knowledge should work the same way: compiled once, versioned, cited and approved — one source that every person and every AI agent draws on, from any device, under your rules.

Your AI is only as good as what it knows. Trail is where it learns.

The loop

From a pile of files to knowledge you can ask.

Five steps, run for you. Every source goes through all of them once — and every Neuron keeps the trail back to where it came from.

Ingest

Every source, one inbox.

Drop files, clip pages, forward conversations or let your agents save what they learn. Trail keeps the original untouched.

UploadPDF, Word, Excel, PowerPoint, images
Web ClipperAny page, one click
ConversationsChats saved as sources
API & MCPAgents and scripts write in
Everywhere you work

One brain. Every place you ask.

Your knowledge shouldn't live in one app. Trail answers in your editor, in your browser, on your website and on your phone — always from the same compiled brain.

In your AI toolsClaude Code, Cursor and any agent reach your brain over MCP and the API — and can save what they learn back into it.
Clip from the browserThe Web Clipper sends any page into your brain in one click. Trail compiles it while you keep reading.
On your website<trail-chat> puts a cited answer box on any page — your visitors ask, your brain answers.
On your computerTrail Ambient runs quietly on your Mac and catches what you work on — filtered and redacted on-device, then sent to your brain for review.
trail
your brain
Claude Codesearch via MCP
Web Clipperpage saved
Chatanswer + 3 cites
Curator1 to review
Website<trail-chat>
Macdrop to ingest
Ambientcaptured on-device
What did we decide about hosting in Q3?
trail · broberg-aiEU only — hosted in Stockholm, with EU language models for customer data [Board minutes Q3]. The launch date in spec v4 is contradicted by your call with Anna [Call with Anna].
For business

One brain for the whole organisation.

From a five-person agency to an enterprise with thousands of employees: Trail turns what your company already knows — Word documents, Excel sheets, board minutes, decisions and conversations — into knowledge every employee, customer and system can ask.

Small business

Your expertise, answering around the clock.

Put a cited chat on your website in an afternoon. Customers get answers from your own material — not from the internet.

SMB

Stop asking the same colleague.

One brain behind the website, the intranet and the support desk. New hires find answers on day one, and your experts get their time back.

Enterprise

Knowledge management that keeps itself current.

A brain per department or product, curated by your own experts, reachable from every system over API and MCP. Hosted in the EU.

Website chatbot<trail-chat> answers visitors with sources — sales questions, product details, opening hours.
IntranetPolicies, procedures and handbooks become one place employees can simply ask.
Customer serviceAgents and bots answer from the same approved knowledge, so every reply says the same thing.
Onboarding & trainingNew colleagues ask instead of searching shared drives. Every answer shows where it came from.
Sales enablementOffers, case studies and pricing notes compiled into answers your sales team can trust.
Reports & documentsWord, Excel, PowerPoint and PDF go in as they are — Trail reads them and keeps the numbers.
Live demo →

Your Business Analyst. Your Business Intelligence.

Ask your business, not just your documents. Trail reads board minutes, monthly reports and Excel exports, and answers like an analyst: what changed, why it changed, and which source says so.

Trends across reports
Decisions linked to numbers
Contradictions flagged
Every figure cited
Try the live demo
Why did gross margin drop in Q3?
trail · business analyst · previewFreight costs rose 22% after the carrier switch [Q3 revenue.xlsx], decided in June [Board minutes Q3]. The Nordics held their margin by moving to annual contracts [Sales playbook.docx].
Proof, not promises

Nothing goes into your brain because a model says so.

Every claim can be traced to its source, every disagreement is flagged, and you decide what stays.

Citations

Every Neuron and every answer links back to the exact source — follow a claim to its origin in one click.

Answer · 3 claims3 cited
Neuron · Pricing2 sources

Contradictions

When a new source disagrees with what you already know, Trail flags it instead of quietly overwriting.

Launch date2 sources disagree
Same source, new versionnew canon

You curate

The model proposes, you decide. A review queue, an approval threshold and a full history keep every change reversible.

Candidate Neuronwaiting for you
Edit · v3 → v4reversible
Architecture of thought

Architecture of thought.

The primitives for a persistent graph of cross-referenced Neurons — compiled by an LLM, curated by you, navigated by association.

LLM-Compiled WikiSources are not chunked and indexed — they are read by an LLM that authors a persistent graph of Neurons on your behalf. Every new fact updates existing Neurons instead of spawning isolated fragments.
Cross-Referenced NeuronsEvery Neuron links bidirectionally to its source documents and to related Neurons. Follow a claim back to its origin, or forward to everything it touches — the associative trails Vannevar Bush imagined.
Instant Full-Text SearchBuilt-in SQLite FTS5 with auto-sync triggers keeps sources and compiled Neurons searchable in lockstep. No vector index to rebuild, no embedding drift.
Adapter ArchitectureStorage, LLM, vision, and pipeline processors sit behind pluggable interfaces. Start local with SQLite and Claude Code; swap in R2, Anthropic API, or a CMS consumer without touching the engine.
Extensible IngestionConnectors roadmap: Slack, Discord, Notion, GitHub, Linear. Today: Markdown, Web-Clipper, DOCX and PDF upload, plus native MCP for Claude Code and Cursor.
Curator, Not DictatorThe LLM proposes, you dispose. Twelve candidate kinds, an auto-approval threshold, and a replay-able event log keep every change reviewable and reversible.
Pricing

Plans for every size of organisation.

From a single website chatbot to knowledge management across the enterprise.

New plans are on their way. There is no free tier: every plan includes EU hosting, citations and the curator queue.
As we may think

Stop searching your files.
Start asking your brain.

Give Trail what you already have. It reads it once, connects it, and answers with sources — from anywhere you work.

Talk to us

Tell us what you want your brain to know.

A few questions so the first conversation is about your knowledge, not about filling in forms. We answer the same working day.

Who is it for?
Employees
What would you use it for? (pick any)