Latchkey

Kenji Watanabe

@kwatanabe_dev

Type-safe schema diffing for polyglot microservice migrations.

Dev ToolsSingaporeSeedINBOUND

Quiet infra maintainer — undersells himself, ships relentlessly

Decided in 18h

Enter the arena View memo

Founder Score

A running score for this person, not this pitch — it persists across applications and never resets to zero.

55Mar 01, 25

Inbound application — modest deck, understated claims

65Apr 10, 25

Dependents graph shows 40+ companies using the OSS core

75Jun 02, 25

Legibility corrector applied — substance under-sold on deck

3-Axis Score

Founder, market, and idea-fit are scored independently and never averaged — disagreement between them is signal, not noise.

Founder

Is this person capable of pulling this off?

78improving

Has maintained the OSS schema-diff tool for 4 years with steady, unglamorous commits. Deck undersells adoption; dependents graph tells the real story.

2 evidence points backing this score

Market

NEUTRAL

Is this a market worth building a fund-scale outcome in?

62stable

Dev tools for schema migration is a real, recurring pain point but a crowded category with no single winner yet.

Idea vs Market

Does the specific idea survive contact with that market?

68stable

Idea survives; the OSS-core-to-paid-cloud path is well-trodden and this team already has the adoption to attempt it.

1 evidence point backing this score

Trust Score

2 verified · 1 claimed · 0 contradicted

Every claim this founder made, traced to a source and rated by how well it holds up.

Verified — independently cross-checked against an outside sourceClaimed — founder's word only — not yet checkedInferred — reasoned from evidence, not stated outrightContradicted — checked, and it does not hold up

tractionOSS core used in production by 40+ companies

Verified

Checked: GitHub dependents graph + 6 confirmed production issues filed

“40+ organizations listed as dependents, several with visible production traffic” — GitHub dependents graph

team4 years of continuous maintenance, solo

Verified

“4th year of weekly commits; add multi-schema diff for gRPC + JSON” — github.com/kwatanabe/latchkey@f1a9c0

revenueConverting 3 OSS users to paid pilots

Claimed

In active conversation, no signed contracts yet.

Legibility

A great talker and a great builder can score the same on a deck. This strips out how well the pitch was told, and scores what was actually built.

Raw · the substance, stripped of delivery78

Polished · how good it sounded in the room65

Correction applied — the gap between substance and delivery is removed.

Corrected · what we actually act on78

SUBSTANCE RECOVERED FROM FLUENCY PENALTY