Back in March I said MVP in 60 days. It took closer to 95. Here's what actually shipped and what I learned.
What I built:
Nudge ( staging.usenudge.io ) watches your customer list, spots who hasn't been back in a while, and sends them a personalised re-engagement email automatically.
The AI knows their actual visit history, what services they got, your brand voice, and your pricing (if you opt in). It doesn't invent facts. If it can't ground a claim in your real data, it throws it out and retries.
No templates. No "Hi [Name], we miss you."
What's different from my March plan:
I underestimated the prompt engineering side. Getting the AI to write emails that sound like you - not like a chatbot - took real work. I ended up building a fact-grounding validator that rejects any generated email containing a price, service name, or staff member that doesn't match your actual data. That alone took 2 extra weeks.
Worth it.
Where things stand:
What I need:
The first 10 service businesses to actually use it. Salons, barbershops, yoga studios, gyms — anyone with repeat customers they're not following up with. Free access, I just want real feedback.
If that's you, or you know someone -> drop a comment or reply here.
Still posting real numbers and honest mistakes as I go.
Diniranga, I think the bigger risk now is not the emails.
It's getting feedback from the wrong businesses.
A salon owner who logs in once and says "looks good" is very different from a salon owner who actually has dormant customers worth winning back.
For the first 10 users, I'd be less focused on service businesses broadly and more focused on businesses that already know repeat visits drive revenue but are not consistently following up.
The reason is that you'll learn much faster whether Nudge is solving a retention problem or just generating interesting emails.
The first-10-user acquisition path feels more important than the next product feature right now. Happy to put the tighter version in writing if useful.
That makes a lot of sense and I agree the risk isn’t the quality of the emails, it’s getting feedback from businesses that don’t actually feel a real retention problem.
I’ll narrow the first 10 users to businesses that already understand the value of repeat visits but aren’t consistently following up, so the feedback is tied to real dormant customers and real outcomes, not just surface level reactions.
I agree that who we onboard first will teach us far more than adding another feature right now.
Exactly.
The danger is that the first 10 users can make Nudge look validated even if they were never the right businesses to test retention in the first place.
I’d make the next step very narrow: define which businesses are most likely to have dormant customers, repeat-visit economics, and enough lost revenue to care now.
Drop your email and I’ll send over a tighter first-10-user path in writing instead of stretching it out in the thread.
The "false validation" risk is real - 10 happy businesses that never had a real retention problem would tell me nothing useful.
Would love the tighter path. Dropping my email: [email protected]
Sent you a note by email. Main thing is avoiding false validation from businesses that like Nudge but do not actually have a repeat-visit problem.
Congrats on getting the MVP live.
What's your main goal for the next 30 days: feedback, users, or revenue?
users and feedback. But if I had to pick what matters most right now, it's feedback from real businesses. I want to get Nudge in front of actual salons, gyms, any other small businesses and hear what resonates, what's confusing, and what they'd actually pay for. Users without feedback is just vanity at this stage.
Shipped > perfect. 95 days with a grounded AI that doesn't hallucinate is worth more than 60 days with one that does. What's the first signal that told you it was actually working for a real customer?
Love that framing!
Still onboarding my first pilots, so no "real customer" signal yet. But the one I'm watching for: a business owner reads a Nudge-generated email and goes "wait, how did it know that?" - because it's pulling from their actual customer visit history, not templates.
That moment of surprise is what I'm building toward. 😄
Sounds great, mate! Good luck with it.
the target businesses, salons, barbershops, yoga studios, gyms, all share the same distribution problem. they don't read IH, they're not on Product Hunt, and the owner is cutting hair or teaching class not scrolling founder forums. curious how you're actually planning to reach them because the first ten users from this post will be easy but the path to the next hundred is a completely different sales motion than anything that works in this community
You're right , salons and gyms aren't on IH or Product Hunt. The owner is cutting hair, not reading founder forums. So the first 10 from this post are a gift, not a strategy.
The real distribution is offline - walking in, building trust face to face, showing the product on their own customer data. That's the motion that scales to the next hundred. Starting local is actually an advantage here, not a limitation.
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95 days instead of 60 — sounds familiar.
Building takes longer than planned, always.
I'm Minchul, 57, former construction site manager from Korea.
Built Slash it — an Email Decision OS for busy executives.
Also looking for my first real users right now.
The fact-grounding validator sounds like solid engineering.
Good luck finding your first 10!
Love the story, Minchul, 57, former construction manager now building an Email Decision OS. That's the kind of founder journey IH was made for. Good luck with your first 10 too, hope we both land them soon! 💪
Thank you!
Same boat — let's both land them soon.
Following your journey too. 💪
The fact-grounding validator is the smartest part. Most AI email tools ship a hallucinated price and lose trust on the first bad send. Grounding every claim in real data is what makes auto-send safe.
Exactly this. One hallucinated price or wrong service in an email and the business owner never trusts it again , game over.
That's why grounding every claim in real visit data wasn't optional, it was the whole foundation. Trust is the product, the email is just the output. 😄
Congrats on shipping! What was the biggest thing you cut or changed from your original scope to actually get it out the door?
Thanks! The biggest thing I cut was SMS/WhatsApp as a follow-up channel. It was in the original spec - the idea being that if someone doesn't open the email sequence, a text could close the loop. I had the architecture sketched out.
I pulled it before building a single line.
The reasoning: I didn't actually know if email would convert yet, so I'd be adding maintenance overhead (carrier compliance, opt-outs, number provisioning) to a second channel before proving the first one. Single-channel also forces cleaner writing - you can't lean on "I'll just SMS them if they ignore it."
It's still on the list, but only if real owners ask for it after seeing email results. Classic "do less to learn faster."
Congrats! Ive recommended it to a friend of mine who runs the local café/restaurant. The best of luck!
That means a lot, genuinely. A café or restaurant is a perfect fit — regulars who drift away are usually just busy, not gone, and a well-timed nudge tends to bring them back. Hope your friend finds it useful, and feel free to have them reach out if they hit any questions getting set up!
Congrats on shipping.
A lot of people stay stuck in planning mode, so getting an MVP live is already a big win.
Looking forward to hearing what you learn from your first users.
Thanks! That's exactly the trap I was trying to avoid - I caught myself over engineering the AI prompt pipeline and billing system way past "good enough to test with real users." At some point I just had to draw a line and ship.
Hi, sir.
Profile: https://topstar-ai.github.io
I’d really appreciate the opportunity to connect and promise good benefit to you.
Looking forward to your thoughts.
Best regards.