Decisions that survive time.

Decisum captures the context behind your decisions—so anyone can understand what happened months later, in minutes.

Context decays. Quietly.

Decisions are made well

Teams make thoughtful choices with the right context at the time.

But rationale fades

People join, leave, or forget. The why behind decisions disappears.

Explanations repeat

Project leads become the source of truth, explaining the same things over and over.

Capture context without the work

Decisum extracts what matters from your existing workflow and builds a timeline anyone can follow.

Forward emails

Each project has a unique email address. Forward relevant threads and Decisum extracts what matters.

Upload documents

Drop in meeting notes, specs, or proposals. Important context is captured automatically.

AI drafts entries

Decisum generates brief, structured timeline entries. Decisions, assumptions, surprises—all categorized.

You confirm with one click

Review, edit if needed, and confirm. You stay in control—AI assists, but you decide what matters.

A timeline that tells the story

Six months from now, anyone can understand how your project reached its current state in ten minutes.

Project Alpha — Infrastructure Migration
Jan 15
decision

Built feature in-house due to data residency requirements

Jan 18
assumption

Traffic expected to stay below 20k users for 6 months

Jan 22
constraint

Schema changes blocked by reporting dependencies until Q2

Feb 3
surprise

Customer Z signed early; traffic projections doubled

Feb 5
decision

Accelerated infrastructure timeline based on new projections

Feb 12
milestone

V1 shipped to beta users ahead of schedule

Built for professionals who manage complexity

Consultants

Client projects require explainable decisions. When handovers happen, context needs to transfer cleanly.

Program Managers

Cross-functional work means many stakeholders. Stop being the person who "remembers why."

Team Leads

Long-running projects accumulate decisions. New team members should understand the history without a meeting.

Everything you need, nothing you don't

Entry types

Decision, Assumption, Constraint, Surprise, Milestone, Incident

Team collaboration

Invite team members as editors or viewers

Weekly digest

Review pending entries with a single email

Export to PDF or Markdown

Your data, portable and accessible

Source linking

Every entry links back to the original email or document

Auto-confirm

Unreviewed entries confirm after 7 days (configurable)

Request early access

Decisum is currently in private beta. Sign up to be notified when access opens.

Decisum

Decisions that survive time.