43 of 406 ideas

An AI scriptwriting SaaS for YouTube creators built on selling before building — $20K pre-sold before the product existed, then 4,000+ customers, ~$30K/mo, and $700K in annual sales inside 18 months.

A non-technical Amazon seller built an AI product-research tool in 48 hours with Cursor, then borrowed someone else's distribution — a rev-share deal with a coaching company sitting on thousands of students — and hit ~$21.8K/mo in 90 days.

Open-source self-hosting as the top of the funnel, the cloud-hosted version as the paid tier — 21K GitHub stars carrying $9K MRR

Clone a product already validated by tens of millions, keep only the core feature, price it low, and go straight for the users the original's bloat has annoyed

A micro SaaS that auto-generates city-specific renovation permit application packages for homeowners

A micro SaaS that turns dropped-in B2B spec sheet PDFs into an automatic comparison table

Take the agency work of "building scorecard assessments for clients" and productize it into self-serve SaaS

A browser tool that lets IT admins deploy apps to Microsoft Intune in one click — so boring nobody copies it, yet it makes $60K/mo

AI agents mine real demand signals and drop one data-backed startup idea in your inbox every day

A Japanese freelancer scratched his own invoicing itch in PHP, gave it away free until 10,000 people used it, then switched on ¥980–¥3,000 plans and collected ¥100K–¥120K a month for years before selling the whole thing

Analytics and client reporting built for email/SMS marketing agencies instead of the brands they serve — one sale onboards 30 brands at once

He bought a dying five-year-old SEO tool for $30,000 doing $1,500/month, spent two months fixing retention instead of marketing, and took it to $30,000/month with two contractors and no employees

He built an add-on for a Microsoft product with only 12,000 customers worldwide — a market too small for anyone big to bother with — and bootstrapped it past $10M a year

A Calendly competitor priced per meeting booked instead of per seat, free to embed for anyone building software, designed to run on a few hundred dollars a month forever

A non-developer built a SaaS in Bubble, took it to $10-11K MRR in his first year, tried to sell it to private equity for $112K — and concluded that the acquisition failed partly because his growth came from twelve burner TikTok accounts instead of an ad account.

A testimonial-collection tool that reached $1M ARR with no viral launch, after Reddit, the indie-hacker community, Slack and partnerships all failed and SEO plus affiliates quietly worked

A Chrome extension clones your app's front end into a clickable demo you can embed anywhere — $250K MRR in two and a half years by ranking for every competitor's name.

A form builder that gives away 99% of its features with no limits, then converts about 3% of 140,000 users at $29/month — $70K MRR on a team of four, built by out-positioning Google Forms and Typeform instead of out-spending them

A single-platform social tool that hit $1K MRR in two weeks and $300K/month by giving a quarter of its profits to one creator as head of distribution

A $100/month waitlist-and-reservations app for restaurants that undercuts OpenTable and Yelp by refusing to charge cover fees

A local-only desktop app that turns a Korean school counsellor's three hours of monthly paperwork into ten minutes — ₩20M a month from under 100 schools, built solo with Replit and Claude Code

A corporate data analyst built the tool his employer refused to build, sold it back to his employer as customer number one, and exited at nearly 10× revenue five years later

A survey tool with no ads, no trackers and no cookies, sold to companies that legally cannot leak respondent data — $115K/month recurring from a three-day hackathon build

Construction management software for residential builders — $2M ARR and $40K a month of profit, with 95% of revenue traced back to long-tail blog posts

A contractor turned three clients' repeated requests into a SaaS product, grew it to $883K of exit value on blog posts alone, and never made a single outbound sales call

Software for nurseries and preschools started by a 19-year-old in his mother's daycare — over 20 million złoty in revenue, half a million parents, and one in three Polish parents with a child in private childcare

Two lazy engineers automated the part of GitHub that GitHub wouldn't build, gave it free to open source, and now bill 150 engineering teams ~$750/month each — $110K/month, bootstrapped

A second-time French founder walked into 20 factories, got 19 nos, and turned the one yes into eight separate software companies doing €2.2M a year across 180 factory sites — sold almost entirely through 100 tiny consultancies on commission

Upload a podcast episode, get the show notes, newsletter and social posts back — a two-week build that reached $16K MRR after four earlier products went nowhere

Everyone else sold marketing automation; this founder sold only the step marketers actually hate — building the HTML email — and 1,500 free templates plus a content-marketing engine took it to $3.7M ARR

A Japanese restaurant reservation platform that wins deals by telling restaurants their current vendor is holding their customer data hostage — and lets anyone export everything, any time, with no contract lock

Take a tool that agencies sell for ¥100K a month, sell it to sole traders for ¥5K, then pay your three free beta users ¥5,000 a head to sell it for you — the exact sequence that took a Japanese solo dev to ¥200K/month