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CorroboratedⓘEvidence tiers: Early signal = 1 builder post · Corroborated = 2-3 posts · Validated = 4+ posts across 2+ platforms. Every count appears exactly once, in the fact bar below — each traces to real source posts.
Open Source Invoicer
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Every source post · named rivals with real prices · what builders tried & dropped · quantified pain — all traceable to the original posts
Sign up free →Hard requirements
Non-negotiables stated by builders in their own words. Miss one and they will not switch.
open-sourcefree unrestricted use for a certain timeframerun on phone
Competitor pricing
Competitor pricing · checked 2026-07-02
✓ Checked 4 sources (community signals · GitHub · App Store · web) — no direct paid competitor found. First-mover window.
How we checked
Where we searched
2 sources · GitHub · SaaS marketplaces
Verification funnel
rivals verified from 70 raw matches (AI-de-duped)
Last scan
1d ago · auto-refreshed every month