SaaS ideas your next customers are already looking for
100 SaaS startup ideas for the people who said they'd pay, from agency owners to dentists. Micro SaaS ideas, AI SaaS ideas and B2B SaaS ideas: find yours, build it, sign them up.
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Pain points in business: what people struggle with
Search the problems to solve, as people described them on Reddit and other platforms, in their own words.
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Invoice Photo Stock Intake for Liquor Stores
Turns distributor invoice photos into received stock and costs for liquor stores.
Vendors say liquor stores key each delivery in by hand: cases, deposits, costs. This tool turns a photo of the invoice into stock in Square.
The evidence
Score: 34 out of 100
- No opening found
- 43 pay or would pay
- 428 people describe it
- 81% hit it at least weekly
- 6.8K upvotes on their posts
Funded Santé and Thrive already sell invoice receiving; zero liquor owners in the data asked for it.
In their words
Every invoice I get — email or paper — means retyping the vendor, date, amount and line items by hand into a sheet, then double-checking I haven't already logged it.
Every merchant I work with has somebody who opens a supplier spreadsheet or PDF once a week and hand-copies prices, stock levels and new SKUs into their store.
inventory was the deal breaker. Case-to-single breakdown, reorder triggers, ID checks, liquor and tobacco tax rules.
The tools that already cover it
- Santé (santehq.com): Liquor-only POS (register software) with AI invoice receiving and cost change review; Y Combinator backed; you must replace your register.
- Thrive Inventory (ex-Shopventory): Already turns invoice PDFs and photos into purchase orders synced to Square, with case breaking; vendor invoices only, one file at a time, no credit memos.
- Square for Retail (Plus plan): Has vendors, purchase orders and stock intake, names wine and liquor retailers; no invoice photo import found.
- Lightspeed Retail: Bottle sizes and bottle fees; no invoice scanning listed on its liquor page; means replacing your register.
- KORONA POS: Sells by bottle or case; invoice import and deposits not listed on its liquor page; means replacing your register.
- MarketMan: Scans invoices (50 a month on Starter) but built for restaurants, not retail shelves.
- WISK: AI invoice scanning for bars and restaurants, not retail liquor stores.
- Epos Now: Automated purchase orders and age checks; no invoice import listed; new hardware required.
- FasTrax POS: Liquor compliance register; invoice import not listed; replaces your registers.
How it was challenged
- The only liquor receiving post is a Santé employee pitching AI invoice scanning (three such comments, one account). That is advertising, not demand; no store owner in this packet asks for it.
- Incumbents do this wedge: Thrive turns invoice photos or PDFs into purchase orders synced to Square, at $2 each, and Santé (Y Combinator backed) sells liquor-only AI invoice receiving.
- Of 8 explicit willingness-to-pay posts, none is a liquor owner paying: they are repair shops, a florist, other retailers, a homeowner refusing subscriptions, and the Santé vendor.
- 37 people across 30 subreddits mostly complain about point-of-sale (register) software, not receiving. Only 4 posts are liquor; the cluster supports a general POS idea, not this narrow wedge.
- The hard part is matching distributor item codes to products and splitting cases; wrong splits corrupt costs and stock counts, so every line needs owner review.
The pain point it solves: Unreliable POS Systems
Retail and restaurant staff struggle with POS systems that crash, lag, lack essential features, and lock in data, causing lost sales and manual workarounds.
Retail and restaurant staff
Where they talk
- r/POS
- r/shopify
- r/smallbusiness
- r/SquarePOS_Users
- r/petco
- r/retailhell
- r/SephoraWorkers
- r/UltaEmployees
Tools they use today
- Square
- Shopify
- Toast
- Clover
- MPOS
- Lightspeed
- QuickBooks
- Claude
Why those fall short
- outdated, slow, crash, log out, freeze during use
- register lags, crashes, and prompts slow scanning
- no pause function; void limits trigger write-ups
- systems outdated, not updated in over 10 years
- Devices decline gift cards, freeze, run out of battery, and connect to wrong readers.
Map of ideas
Drawing the map…





