With generators/DI, LazyPromise has become a tiny alternative to Effect
lazypromise.com · 1 day on the radar
Where is the demand coming from?
Mixed
Some genuine outside demand, some founder reach. This is the read that decides whether the traction would transfer to you.
Roughly what does it earn?
Not disclosedNo basis to estimateWe do not publish a figure until we have something to base it on. When we do, the method that produced it is shown alongside the range.
Could you build it?
Yes, in about 2 weeks
Nothing patented, no network effect, and no proprietary data set standing in the way.
What it is
LazyPromise is a minimal async primitive library offering lazy and cancelable promises with generator syntax, type-safe errors, and dependency injection, positioned as a lighter alternative to the Effect ecosystem. It's gaining early technical attention on Hacker News with a single-shot Observable design that complements modern signal-based architectures.
The one thing to knowThis is a developer tool library (not a product with monetization potential) aimed at a niche audience already familiar with Effect, RxJS, and generators; speed-to-build is high but addressable market and defensibility are both low.
Proof we found, with sources
The scores behind the verdict
Directional reads from public signals, 0 to 100▸ Show the four scores
TractionWeak8 / 100
How much demand shows up from people outside the founder's own circle.
CopyabilityEasy to match75 / 100
How feasible it is for a competent builder to ship something comparable.
Wedge potentialFair35 / 100
How much room is left for a new entrant: gaps, ignored segments, pricing openings.
MonetizationUnproven0 / 100
How much evidence there is that people actually pay: visible pricing, revenue claims, a paid tier in use.
Unlock the full brief
How it works under the hood, how it gets customers, where it is weak, and the opening we would take, with a bottom-line verdict.
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Revenue, user and tactic numbers are evidence we found and attributed, with a confidence rating.
They are directional reads, never verified guarantees.