Micro SaaS ideas you could actually build
Bootstrapped, one- or two-person software businesses still under $5M a year — small enough that the ceiling is the point. Each is a real company you could plausibly still become, with the number and its source.
30 real companies · every number links to the page that reports it · corrections published
- 1
Ran $4.6M ARR on 3 people. Revenue-per-employee that high is what a strategic buyer pays a 13x premium for.
SaaS teams add a no-code snippet, then build tours, checklists and surveys → They subscribe by monthly active users: Adoption Studio from $500/mo (1K MAU, or $400/mo billed annually), plus an Agent plan at $100/mo → 600+ paying accounts, high margin = $4.6M ARR run by 3 people
The catch Crowded onboarding category, thin moat
Read the full teardown → - 2
Amazon stores your stock abroad, so EU law forces you to VAT-register there — no threshold, no opt-out.
Amazon spreads a seller's stock across 5+ EU countries → EU law forces a separate VAT registration in each → hellotax auto-registers and files it from 49 EUR/mo per country
The catch Human accountant layer caps scaling.
Read the full teardown → - 3
A claims adjuster who'd already built claims software inside a big firm — he knew the workflow before line one.
Storm hits — a carrier dispatches its claims → Adjusters work them end-to-end in ClickClaims, wired into Xactware, Symbility & 50+ dispatch systems → 50 carriers & IA firms pay annual license → $4M+ ARR
The catch Tiny buyer pool, revenue rides the storms.
Read the full teardown → - 4
No-code automation for non-coders; recorded tasks become workflows. Sold on Acquire.com for mid-seven figures.
Non-coder records or describes a task in plain English → TaskMagic turns it into a browser or app automation, no Zapier → Usage-based subscriptions: 7,000+ customers, then a seven-figure sale
The catch Thin moat; grew on one-time lifetime deals
Read the full teardown → - 5
99% free forever — unlimited forms and responses where Typeform gates them. The free tier is the growth engine.
Free: unlimited forms + responses, 99% of features → Free users share forms — SEO + word of mouth compound → The few who need branding, domains, teams pay $29/mo Pro
The catch Zero moat — a form builder is easy to copy.
Read the full teardown → - 6
A designer-engineer couple left Facebook and built a $3.4M product-feedback SaaS with 17 people and $0 raised.
A SaaS team adds a Canny board to collect feature requests → Free public boards rank in search, tagged 'Powered by Canny' → Teams pay by tracked users for private boards and integrations - Pro from $79/mo billed yearly
The catch Easy to clone; a dozen cheaper rivals.
Read the full teardown → - 7
A dental-lab insider selling the one workflow incumbents skip: memberships that free practices from insurance.
A dental practice subscribes to BoomCloud → It builds and runs their in-house membership plans → BoomCloud bills a single-location license + $3.50 per member, per month
The catch Crowded field; a free giant, Kleer, looms.
Read the full teardown → - 8
Bootstrapped AML/KYC checks the law forces every fintech to run — self-serve API undercuts VC giants Onfido, Sumsub.
Fintech/crypto/bank must ID-verify every user (AML law) → Integrates ComplyCube API: doc scan, liveness, AML screen → Pays per successful check + monthly plan ($99-$299+)
The catch IDV commoditizes; Stripe/Plaid bundle it free
Read the full teardown → - 9
A simple UI on Amazon SES: send a million emails for under $100, undercutting Mailchimp with no mail servers to run.
Free tier: 2,500 subs, 10k emails/mo, no card → List outgrows the free cap → Upgrade to paid from $9/mo billed yearly — AWS SES sending stays tiny
The catch Anyone can wrap SES; price is the only moat
Read the full teardown → - 10
Flat price by member count, every feature in — the opposite of the upsell maze gym owners hated.
Gym owner fed up with MindBody's fees → Switches to Gymdesk, imports members → Pays $75-200/mo flat, all features in
The catch Crowded field; flat pricing is easy to copy.
Read the full teardown → - 11
Built Slack-first: request and approve leave without leaving the chat app teams live in all day.
A team installs the free Slack, Teams, or Google leave bot → It outgrows the free plan (1 location, 1 leave type) → Upgrade to $2-4 per active user each month
The catch Thin, cheap feature an HRIS can bundle free.
Read the full teardown → - 12
Twenty years of free scanners built the top-of-funnel; regulation (EAA, ADA) now forces every site through it.
Give away a free WCAG checker devs use worldwide → Regulation (EAA, ADA) forces orgs to prove compliance → They buy annual whole-site monitoring
The catch Axe and AI commoditize the core scan.
Read the full teardown → - 13
Sat inside Stripe's checkout, so it already owned the exact data the new VAT law made legally mandatory.
Seller connects Stripe, PayPal or Shopify → Quaderno applies the right VAT/sales tax per buyer's country and logs it → Seller pays a monthly SaaS fee to stay legally compliant
The catch Control low
Read the full teardown →
Stripe can bundle the tax layer - 14
Run a tow company's dispatch, impounds and billing through one app and switching costs quietly become the moat.
Tow company ditches paper forms and whiteboards, signs up → Dispatch, impounds, motor-club calls and billing run in-app → Pays $109-$429/mo by call volume — recurring, no contract
The catch Niche TAM ceiling; the code is copyable
Read the full teardown → - 15
They ran the Netherlands' No.1 rental chain first, then sold the exact software that got them there.
Rental shop loads its inventory + availability → Adds a booking storefront; takes online orders + deposits → Pays Booqable $35-187/mo flat, or $29-149/mo billed yearly — zero cut of bookings
The catch A fragmented long tail; low ACV, slow scale.
Read the full teardown → - 16
A free keyword tier gave data-starved Etsy sellers what Etsy hid, then upsold a slice at $6-30/mo.
Etsy hides keyword & search-volume data from its sellers → eRank aggregates it across millions of shops; the free tier pulls sellers in → A slice upgrades to $5.99-$29.99/mo recurring
The catch Control low
Read the full teardown →
on Etsy's rented land - 17
consumer tax software ignores the expat-only forms (2555, FBAR, 8938) — this was built around exactly those.
Expat fills a guided<br>interview (income, accounts) → Software fills 2555,<br>FBAR, 8938 & e-files → Flat fee per tax year<br>(about $115-175)
The catch ⚠ Scale capped
Read the full teardown →
about 9M expats, seasonal - 18
He ran a maid service before building the tool, so he knows the exact workflows generic field-service apps miss.
Maid-service owner juggles crews and clients by text → Subscribes to a ZenMaid plan: Starter $19/mo (40 appointments), Pro $39/mo or Pro Max $49/mo → Recurring subscriptions, about $200K every month
The catch Tiny, price-sensitive niche caps the ceiling.
Read the full teardown → - 19
A co-founder's brother ran a countertop shop, so v1 was built inside a real fabricator's daily workflow.
Countertop shop runs on spreadsheets + buggy tools → Adopts Moraware to quote, schedule + track slabs → Pays a monthly per-user SaaS subscription
The catch Countertop-only market caps growth.
Read the full teardown → - 20
A painting contractor built the CRM for his own trade — and already had the contractor audience to sell it to.
Home-service pro subscribes → Runs leads, quotes, jobs, invoices in-app → $97-147/mo per business
The catch Audience edge stops in trades he's unknown.
Read the full teardown → - 21
She was the customer — a broke agent selling the exact Instagram templates that got her out of bartending.
Realtor drowning in daily social-media pressure → Joins for $74/mo: templates, calendar, community → Monthly dues compound across thousands of agents
The catch Templates rivals can copy in a weekend.
Read the full teardown → - 22
Italy-only compliance depth + TeamSystem's accountant channel, as a 2019 law forced every VAT business to e-invoice.
Italy mandates e-invoicing through the state SdI → SME signs up, often via its accountant → Pays €4-24/mo ($4-26) subscription, recurring
The catch Moat is Italy-shaped; won't cross borders.
Read the full teardown → - 23
The tax law creates the search; CoinLedger owns it - ranking #1 for 'crypto taxes' instead of buying ads.
IRS taxes every crypto sale - filers must report gains → User googles 'crypto taxes' and lands on CoinLedger, ranked #1 → Pays per tax year for an auto IRS Form 8949 + TurboTax export
The catch Revenue swings with the crypto price cycle.
Read the full teardown → - 24
Ten years shooting 60+ weddings a year made him his own ideal buyer; he pre-sold 100 lifetime seats before writing code.
Photographer signs up; free data migration in → Runs leads, quotes, contracts, invoices in one app → Renews yearly at $160-400 depending on plan (or $16-40/mo)
The catch Tied to one niche; later sold to a roll-up.
Read the full teardown → - 25
Free WordPress.org versions convert to paid; 61% of revenue is renewals; publishes exact numbers yearly.
Store owner hits a WooCommerce limit (bad catalog, no order form) → Installs Barn2's free lite plugin from WordPress.org → Buys the Pro annual license, then renews yearly
The catch New sales fell 17.8%; growth nearly flat.
Read the full teardown → - 26
Turns Shopify's generic invoices into per-country, accountant-validated tax documents that survive an audit.
An EU or UK Shopify store must issue a legally compliant VAT invoice — Shopify won't make one. → Sufio auto-generates per-country invoices, validates VAT IDs, and files PEPPOL / ZUGFeRD e-invoices. → Merchant pays $7-129/month to stay audit-proof.
The catch Rents its whole house on Shopify.
Read the full teardown → - 27
Bought an unloved free WordPress plugin and grew it to 30K+ podcasts — each one a hosting lead.
Free WordPress plugin runs 30K+ podcasts → Plugin funnels those users into Castos hosting → They subscribe at $19-$499/mo to host + analyze
The catch Commodity hosting; giants bundle it free.
Read the full teardown → - 28
The product was a £4,000 ($5K) WordPress plugin — the moat was owning the accountants' attention first.
Accountant can't price consistently → GoProposal standardizes pricing + proposal → Firm pays £70-225/mo (excl VAT), tiered by proposals and users
The catch ⚠ Scale capped
Read the full teardown →
one vertical, UK-first - 29
Content-brief builder shaped by user pain, not rival headlines; a giant AppSumo LTD brought in 4,000 paying teams.
Marketer must research an SEO brief for every article → Contentpace auto-built the keyword brief and report → 4,000 teams paid: subscriptions plus AppSumo lifetime deals - sold to Content at Scale in 2023, absorbed into BrandWell in 2024
The catch Lifetime deals left thin recurring MRR
Read the full teardown → - 30
Won the crowded WP-care market on transparent per-site pricing plus obsessive backup reliability.
Agency adds client sites to one dashboard → Pays $2.19 per site / month, auto-scaling → $110K MRR · $1.3M ARR — fully bootstrapped
The catch ⚠ Entry low
Read the full teardown →
easy to clone
This list is a slice of Kaeda's library. Every figure is filed, stated by the company, or our estimate with the arithmetic shown — and when a source turns out not to say what we said, we change the number and publish the correction.