Validating a SaaS idea for freelancers: automated follow-ups for unpaid invoices
Hi everyone — I’m exploring a SaaS idea and would really appreciate some honest feedback before building further.
One problem I keep hearing from freelancers is chasing late payments. People send invoices, then end up manually checking spreadsheets or sending awkward reminder emails to follow up.
The idea I’m exploring is a simple tool where freelancers can:
• use AI to create or upload invoices
• track which ones are unpaid or overdue
• AI automatically sends polite follow-up reminders until payment is received
The goal is basically: “Set it up once and never chase invoices again.”
I put together a quick landing page and a mock dashboard to visualize what the product might look like:
https://invoiceai-swart.vercel.app/
Right now I’m mainly trying to validate a few things before building an MVP:
- Would something like this actually be useful for freelancers?
- What tools do people currently use to track unpaid invoices?
- If it genuinely saved time and helped recover late payments, what would feel like a fair monthly price? ($5, $10, $20?)
If you’ve freelanced before or built products for freelancers, I’d love to hear your thoughts.
Even critical feedback is welcome. I’m trying to figure out whether this solves a real problem or if I’m overestimating it.
Freelanced for years, so a few honest notes. Most people I know don't actually track unpaid invoices in a tool — it's the invoicing app's "overdue" list plus memory, which is why things slip past 45 days. The hard part usually isn't sending the email, it's deciding when to escalate and finding words that don't sound aggressive to a client you want to keep. So I'd validate the escalation ladder (gentle nudge → firm → late fee / pause work) before building sending infrastructure. Also worth testing: deliverability and trust. A lot of freelancers won't let a third party email their clients from their domain, and a reminder that lands in spam is worse than none. On price, "recover late payments" is worth a lot, but freelancers are famously cheap for anything recurring — I'd probe whether they'd pay monthly at all, or only when they have an invoice outstanding. For what it's worth I went the other direction with https://followdue.com — it's $19 once for a set of follow-up templates you paste into Gmail yourself, not a sender. Deliberately not a SaaS, partly because the sending side is where the trust and deliverability problems live. That may just mean there's room for someone to do the automated version properly, but it's a real fork in the road worth choosing on purpose.
Full disclosure: I'm Avery Lin (avrlin). I've been packaging a small Get-Paid Chaser Kit (polite → firm → final ladder with a hard stop-when-paid rule) with AI assistance, so take this as adjacent interest, not neutral advice.
The unpaid-invoice follow-up idea is real — the failure mode I keep seeing isn't missing a tracker, it's rewriting the awkward nudge from scratch and guessing whether day-3 should still sound friendly. A fixed ladder removes that decision tax; unpaid ones escalate, paid ones never get the stern note.
Curious — for freelancers you talk to, is the bigger pain writing the first reminder, or deciding when to escalate without souring the relationship?
I like the "set it up once and never chase invoices again" framing because thats the exact part freelancers complain about. I started with manual reminders, looked at QuickBooks and Chaser, and now I'm building ChaseFlow for the narrower reminder-2 problem, imo the wedge is stronger if you stay on followups instead of full invoicing.