Startup idea: Lowball Offer Detector for Job Postings
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'.
Get the PRD prompt, $9.99 Market: $504K in 3 years
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.
Who has it
Job seekers.
- Job seekers
- B2C
- United States
- r/jobs
What people use now
2 options, and the gap between them.
Glassdoor
Levels.fyi
Only clumsy or enterprise-only options.
Lowball Offer Detector for Job Postings is built for the part these leave undone.
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
The first version, in 2 weeks.
- 00 Goal
The one job
A browser extension that saves the posted salary range when you apply and flags offers below it.
- 01 Week 1
The core
Archive the job posting and salary band at application time.
- 02 Week 1
The follow-through
Compare the offer to it, and build a public database of mismatches by company.
- 03 Week 2
How it ships
As a browser extension that works on the pages people already use. AI helps, but the core job works without it.
- — Not in v1
Left out on purpose
Replacing Glassdoor. Version one does the one job above and stops there.
How it could charge
The business model, at a glance.
- Model
- Freemium
- Price
- Under $10 a month
- Buyer
- PeopleAn individual or household pays
- Region
- United States
Hotness
Why it scores 3.70.
Strong pain. Price-sensitive audience. The thread drew 270 upvotes and 80 comments. Only clumsy or enterprise-only options. A 1-2 week mvp.
270 upvotes 80 comments r/jobs Sep 14, 2026 – Oct 14, 2026 verified Oct 14, 2026 Thread ↗
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.
Market size · estimate
How big this could get
A bottom-up estimate for Lowball Offer Detector for Job Postings: real customer counts × a realistic price. Not a forecast.
$168M a year
2.8M job seekers · 40% of unemployed people in the US
$50.4M a year
840,000 job seekers · US, online
$504K a year
8,400 job seekers · 1% of the reachable segment in three years
What that means
8,400 job seekers at $5/mo = $504K ARR
Medium confidenceHow we estimated this
- Base: 7,100,000 unemployed people in the US.
- Has the problem: 40% (assume 40% are actively comparing offers).
- Revenue per job seeker: $60 per year ($5/mo).
- Reachable: 30% (US, online).
- Three-year capture: 1% of the reachable segment.
TAM = customers with the problem × revenue per customer. SAM = the part an early product can reach. SOM = a conservative three-year share of SAM. Bars use a log scale. Shares marked “assume” are our judgment, not measured.
Take it to a build
Build Lowball Offer Detector for Job Postings with an agent, or with us.
Agent starter prompt
$9.99 / 1 credit
A full PRD written for a coding agent: scope, data model, screens, edge cases, and the first week of tasks for this idea.
- Copy it straight into Claude Code, Cursor, or Codex.
- Download it as a .md file you keep.
- Send your bot a private link that refreshes every seven days.
# 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.
The first slice is above. The rest unlocks for 1 credit and is never in this page’s HTML.
Credits work on both sites. On Business Ideas to Build the same credit unlocks the business plan and growth playbook for Lowball Offer Detector for Job Postings.
Or we build it
Your first version, shipped by our team.
A working product in your repo, built from this PRD. You own the code.
$1,000 scoping fee, credited toward the build.
Equity instead of cash is an application, not a checkout →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.
A business write-up of this idea, with its market size, sits on the sister site. Plan and growth prompts