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TECH
Early signalⓘEvidence tiers: Early signal = 1 uncorroborated request — treat as radar, not a validated opportunity · Corroborated = 2-3 requests · Validated = 4+ requests from 2+ different people. Every count appears exactly once, in the fact bar below — each traces to a real source post.
Free Book Tracking
In their words
"Hey ya’ll i was struggling to find a semi decent open source book tracking site so decided to build my own, and added some other optional features like vocabulary tracking, notes, etc: www.bookplate.eu Would love to hear thoughts" — a builder, verbatim · sign in free to trace the source ↗
Hard requirements
Summarised from the posts below. Miss one and they will not switch.
open source
Competitor pricing
Named rivals · prices not yet verified 🔒
Pricing collected · names — log in ↗
How we checked
Where we searched
2 sources · GitHub (open-source check) · SaaS marketplaces
Verification funnel
84 raw matches scanned, then AI-de-duped · see the breakdown below
Last scan
3d ago · auto-refreshed every 10 days
Sign in to see the full opportunity
Every source post · named rivals · what builders tried & dropped · quantified pain — all traceable to the original posts
Sign up free →Signal history
2 posts on record since Oct 2026 — not enough to plot a trend. We plot history once a gap has 3+ posts spanning 3+ weeks.
Evidence pool
2 source posts picked as evidence — each insight links back to a real one.
2 reddit