Organizational memory for engineering teams
Every decision has a reason.
Don't lose it.
Rationale gives engineering organizations a lasting memory of why they decided what they did. The context scattered across RFCs, tickets, and wikis becomes infrastructure - connected, current, and still there years from now.
Free during early access - no credit card required.
Soon every team will have an AI assistant. The durable advantage is the memory it draws on - years of curated decisions a model can't conjure on demand.
See it in action
The complete reasoning,
not just the document.
Pick any decision. Rationale shows everything it preserved - the evidence, the tradeoffs, the rejected alternatives, and how it turned out.
Rationale/ Demo workspaceExample dataExplore the reasoning your organization has already captured
Sound familiar?
Context leaves
when people do.
Every engineer has asked it: “Why did we decide this?” Too often the answer left in someone's head two reorgs ago - and the team relitigates what was already settled.
The files are still there. What's gone is why - the tradeoffs weighed, the alternatives rejected, the context that made the decision make sense.
Reasoning lives in people's heads, in Slack threads, in meetings no one wrote down. Search can't find what was never recorded as an answer.
Every departure, reorg, and pivot widens the gap. The longer an organization runs, the more of its own thinking it can't account for.
How it works
Scattered artifacts in.
Compounding memory out.
RFCs, design docs, wiki pages, tickets - the raw record of how work happens.
Rationale identifies the decisions, tradeoffs, alternatives, and evidence inside each artifact.
Decisions become linked objects - connected to what caused them and what they affect.
New artifacts don't just get added - they strengthen what's there. Decisions update, connections deepen, and the map is worth more every week it runs.
The Decision Map
A living map of
how your organization thinks.
Rationale maintains the map between questions, not at query time. New decisions connect to old ones and supersede them when things change - so the context is already current, and traceable to its sources, when someone needs it.
Move the primary datastore to PostgreSQL for ACID guarantees and simpler cross-table queries. Updated 2 days ago as new evidence arrived.
Click any node to trace how the reasoning connects.
The Decision Map isn't a visualization. It's a new kind of asset: a durable record of what your organization decided, why, what it traded away, and what came next.
Reasoning is structured the moment an artifact lands - not retrieved and guessed at query time. The answer already exists in the map, ready to surface.
When an artifact changes, Rationale re-reasons the affected decisions. The map keeps up with the organization instead of aging into a stale wiki.
Teams reshuffle and people move on. The map holds the full arc - decisions made years apart, connected, with every supersession on record.
Every artifact added makes the next answer better. The map you have after two years cannot be bought or prompted into existence - it accumulates, one decision at a time.
Connectors
Plugs into where
your work already happens.
Connect a source once, and the work your team does becomes memory - no uploads, no upkeep.
Reasoning clients
Answers where
the questions happen.
“Why is it built this way?” comes up mid-ticket, not mid-search. Rationale delivers the reasoning into the tools where work already happens - so engineers start with context instead of hunting for it.
A side panel shows the decisions behind the ticket or page you're reading - evidence, timeline, and what superseded what - and answers follow-up questions right there. No tab-switching, no asking around.
Everything the app can answer is one authenticated API call away - reasoning, citations and all - so the memory can surface in your own tools too.
Clients show the same measured support and source citations as the app, and link straight back to the decision in your map.
After Rationale
Your organization stops forgetting
how it thinks.
Most tools help you find documents faster. Rationale changes what your organization keeps - so the context exists before the question does.
Instead of reconstructing history from stale docs and hallway asks, new engineers start with the rationale behind the decisions that shaped the system.
When someone asks why the team chose Postgres, the tradeoffs and alternatives are one lookup away - not a meeting, not a relitigation.
When an architect leaves, their decisions stay - with the evidence behind them and their place in the timeline. The organization keeps what it learned.
With the past preserved and current, engineering energy goes to the next problem - not to rediscovering the last one.
AI on your terms
Your memory. Your model.
Your keys.
Rationale is the memory, not the model. Choose which AI writes your workspace's answers - or bring your own provider keys, so AI traffic runs under agreements your organization already trusts.
From Claude Opus to Gemini - picked in settings, named in every answer. Even the default is honest: Auto tells you exactly which model it resolves to today.
Add your provider key and that provider's traffic bills to your account, under your contract - stored encrypted, capped daily, and paused visibly if it fails. Never a silent fallback.
The map itself is model-agnostic. Models improve every year; your memory keeps compounding through every switch - nothing to migrate, nothing lost.
Trust & security
Your reasoning stays yours.
Rationale ingests some of your most sensitive thinking. It's built to earn that - the posture below is a product decision, not an afterthought.
We don't train models on your content. What your organization knows stays inside your organization.
Every document is screened locally for sensitive content before anything is embedded or sent to an AI provider. Flagged documents are held for your review, and your deny rules keep matches from ever being stored.
Verify, correct, or delete anything Rationale extracted. Corrections outrank what re-reading a document says, and deletions are remembered - a re-sync never resurrects what you removed.
You're the data controller: content is isolated to your account and encrypted in transit, disconnecting a source stops its flow immediately, and a person's data can be removed on request.
Answers trace back to the artifacts they came from. You verify against the original, not against a summary.
When a decision is replaced, the old one keeps its context. The record shows what changed, when, and why.
Every organization has a system of record for its code, its tickets, its documents. Rationale is the system of record for its reasoning.
Start compounding
Build an organization that never has to rediscover what it already learned.
The answers exist in your organization today. Rationale makes sure they still exist tomorrow.
Free during early access. Connect a source or drop in a doc - Rationale builds your first Decision Map from your first artifact.