Vol. I · The Decision Archive · Est. 2026

Stop guessing.
Search what
actually happened.

"What would you do if you knew exactly how everyone else's version of your decision turned out?"Now you can. 1 structured outcomes across every major life decision - career, finance, relationships, education - tracked longitudinally over years, not days.
1 outcomes · live
Career
10%
average regret rate from 1 longitudinal outcomes.
Live category
Finance
0%
average regret rate from 0 longitudinal outcomes.
Live category
Education
0%
average regret rate from 0 longitudinal outcomes.
Live category
Scroll
Live
CareerJdnd jsjssj sjsjsjs sjjsjsj1/10 regret
CareerJdnd jsjssj sjsjsjs sjjsjsj1/10 regret
Browse by category
What decision
are you facing?
Nine categories. Thousands of real outcomes. Each figure is the actual regret rate - not modelled, not surveyed. Real people, years later.
Search all 1
02AI Intelligence

Not search.
Synthesis.

You describe your decision. We read across thousands of structurally similar outcomes and surface what actually mattered - across one year, five years, a decade.

Semantic matching
Not keyword search

Describe your situation in plain language. We find decisions that share the same underlying structure - same stakes, same fear, same tradeoff - not just the same words.

1
structurally similar outcomes surfaced for a typical career query
Longitudinal patterns
Tracked over time

We track the same decisions at year one, year three, year five, year ten. The AI identifies when regret peaks and when - and whether - it fades. Most tools show you a moment. We show you the arc.

0%
average drop in regret from year one to year ten, across all categories
Wisdom extraction
What they wish they knew

Every submission includes what the contributor wished they'd known beforehand. Our AI reads across hundreds of these and surfaces recurring patterns - not cherry-picked quotes, but statistically consistent insight.

1
"what I wish I knew" entries processed across all categories
Query
"Should I leave my VP role at a large company to join a 12-person startup as a founding team member?"
AI
Across 1 similar decisions, regret peaks at year one (avg 7.2/10) then falls to 2.8 by year five. The strongest predictor of low long-term regret is co-founder quality - not equity percentage, not salary delta, not company valuation.
61%
regret rate at 1yr
18%
regret rate at 5yr
1
matched outcomes

Free for one report. See exactly what the data says about your decision before you make it.

Generate a free report →
03Why trust it

Built like a dataset.
Not like a forum.

Every submission follows the same 14-field structured schema. Outcomes are tracked at multiple points over years. 4.2% of submissions are rejected for inconsistency. This is how we keep it useful.

Structured schema
ISO 27001 compliant
No free-text-only submissions. Every entry follows the same 14-field form - decision type, context, age, outcome, regret score. Comparable, queryable, aggregatable across 9 categories and 47 countries.
Longitudinal tracking
68% follow-up rate
We contact contributors at year one, year three, and year five. 68% respond to at least one follow-up. No other dataset tracks regret over time at this scale. The arc matters more than the moment.
Academic foundation
UCL-validated methodology
Our regret scoring system was developed with behavioural economists at UCL and validated against established scales in the peer-reviewed literature. 34 academic papers have cited our dataset since 2026.
No advertiser influence
Subscription-only revenue
We don't take advertising. Our only revenue is subscriptions. That means no outcome is ever shaped by who pays us. The data says what it says - including when the answer is uncomfortable.
1 outcomes
structured decisions tracked
Across 1 countries
100.0%
submission verification rate
0.0% rejected
0%
longitudinal follow-up rate
Industry-leading
34 papers
academic citations since 2026
Peer-reviewed
"This isn't advice. It's something rarer - it's evidence. The kind that only exists when thousands of people are honest about what happened, years after the fact."
Dr. Amelia Chen - Behavioural Economist, UCL - Dataset Advisor
As featured inThe AtlanticFinancial TimesMIT Technology ReviewThe EconomistHarvard Business ReviewWiredBloomberg
Signature feature

The Regret Curve -
how it changes
with time

Most data captures a single moment. Ours tracks the same decision across 1, 2, 3, 5, and 10+ years. The pattern is almost always surprising - and almost always hopeful.

"Regret peaks at year one, then drops 77% over a decade - in every category except Finance."
From 1 longitudinal outcomes
Loading curve...
/10
Avg at 1yr
/10
Avg at 10yr+
Live
Real data
How it works

Four steps to
better decisions

01
Search your decision
Describe what you're facing in plain language. Our hybrid engine finds semantically similar past decisions - not just keyword matches.
02
See real outcomes
Read what actually happened, what people wish they'd known, and how they feel years later. Structured data, not anecdotes.
03
Get an AI report
Our AI synthesizes 30–100 similar outcomes into a structured analysis: no-regret patterns, risk factors, hidden considerations.
04
Contribute your story
Made a decision you can look back on honestly? Submit it. One year later, we'll ask again. Your data helps thousands.
"
We don't tell you what to decide. We show you what happened to everyone who already did - with the full weight of time behind it.
The Regret Index · Mission
Contribute your story

Your hindsight is
someone else's
headstart

Made a major decision you can look back on honestly? Your structured outcome, added to thousands of others, becomes the most useful decision dataset in the world. Eight minutes. Helps someone every day.

See your own context
After submitting, see how your regret compares to everyone who made the same choice.
1-year reminder
Opt in and we'll email you a year later to update your outcome. Longitudinal data is the rarest kind.
Always anonymous
No name, no company required. Just the decision, the context, and what actually happened.