Lowball Offer Detector for Job Postings: startup idea with real demand
After five interview rounds and a 4-hour unpaid take-home for a job posted at $90k, a candidate got a $62k offer and was told the top of the range was for a 'unicorn'.
r/jobs · Sep 14, 2026 – Oct 14, 2026 · 270 upvotes
After five rounds of interviews for a job posted…
Read the thread · 80 comments
Lowball Offer Detector for Job Postings is a startup idea for job seekers. After five interview rounds and a 4-hour unpaid take-home for a job posted at $90k, a candidate got a $62k offer and was told the top of the range was for a 'unicorn'. A thread in r/jobs drew 270 upvotes and 80 comments between Sep 14, 2026 – Oct 14, 2026. People get by with Glassdoor and Levels.fyi, and that still leaves this job open. Hotness is 3.70, Hot. Strong pain. Price-sensitive audience. The thread drew 270 upvotes and 80 comments. Only clumsy or enterprise-only options. A 1-2 week mvp. A first version is weekend-easy, about 2 weeks, priced under $10 a month and charged as a free tier and a paid upgrade. The pain, the source, the alternatives, the scope notes, and the questions on this page are free to read and free to build from. The agent starter prompt is the paid part. The first slice is on the page. One credit unlocks the rest, to paste into a coding agent, download as Markdown, or send as a private link.
Verbatim quotes are added only after a manual check. Until then, the thread title is the excerpt. Exact post date and verbatim quotes pending enrichment.
Who has it
Job seekers.
What people use now
- Glassdoor
- Levels.fyi
A way through
An extension/service that archives the job posting and salary band at application time, compares the offer to it and builds a public database of mismatches by company.
MVP scope
- Give job seekers a way to do this in one sitting: A browser extension that saves the posted salary range when you apply and flags offers below it.
- Persist the result and show it again after a reload.
- State the empty case when there is nothing to show yet, with one next step.
- Charge later with a free tier and a paid upgrade, under $10 a month. The free path must finish the core job once.
- Ship the browser extension only. Leave Glassdoor to keep the jobs they already do well.
How it could charge
Freemium · Under $10 a month · B2C · US.
Hotness 3.70
4 of 5, Hot. Strong pain. Price-sensitive audience. The thread drew 270 upvotes and 80 comments. Only clumsy or enterprise-only options. A 1-2 week mvp.
Why this score
| Pain | 4 / 5 |
| Willingness to pay | 2 / 5 |
| Demand | 4 / 5 |
| Competition gap | 4 / 5 |
| Ease of build | 4 / 5 |
| Recency | 5 / 5 |
Weights: pain 25%, willingness to pay 20%, demand 20%, gap 15%, ease 10%, recency 10%. Recency is recomputed every build. The source report’s 1–10 score is not shown.
Questions
Is this idea already taken?
People already use Glassdoor, Levels.fyi. Those options do not do the job in the solution above. The idea is free to build. Nothing here is an exclusive claim.
How hard is a first version?
Weekend-easy. A tight MVP is about 2 weeks (2 weeks), assuming the regulated or partner-gated parts are stubbed. The paid prompt turns that into tasks.
Who would pay, and how?
The audience is job seekers. Charge a free tier and a paid upgrade, and test a price under $10 a month. Willingness to pay is one input to Hotness, not a promise that someone will buy.
Can I use the evidence?
Yes. Build the product. The thread title is a short excerpt with a link, not a quote we are putting in someone's mouth. Exact post dates and verbatim lines are added only after a manual check. Ideas are suggestions, not medical, legal, or financial advice.
Agent prompt
The first slice is public. The rest is fetched only after you unlock it, and it is not in this page’s HTML.
# Agent starter prompt: Lowball Offer Detector for Job Postings You are a senior product engineer. Build only the product described in this document. If a detail is missing, choose the smallest option and write it down in the README. Do not invent a second product, a marketplace of marketplaces, or a growth hack. ## Product Name: Lowball Offer Detector for Job Postings One line: A browser extension that saves the posted salary range when you apply and flags offers below it. Shape: Browser extension AI stance: AI-assisted Region for v1: United States Hotness (context only, not a requirement): 3.70 (hot). Strong pain; price-sensitive audience; thread engagement 270▲/80💬 (demand 4/5); only clumsy or enterprise-only options; a 1-2 week mvp. ## Problem After five interview rounds and a 4-hour unpaid take-home for a job posted at $90k, a candidate got a $62k offer and was told the top of the range was for a 'unicorn'. Who feels it: Job seekers.
Unlock the rest with 1 credit.
A free business write-up of this idea sits on the sister site. Plan and growth prompts, free
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