Hi, I'm Millie.
TestFeed started on a completely different path. My company yesterday was building a product in HR tech, and we were seeing some promising signals. I'd done everything by the book - spoke to over 100 prospective customers before we even started building, validated the problem, got great initial momentum.
But then things started to wane. The early excitement faded, traction slowed, and I couldn't figure out why.
Here's the thing about customer research: it's brilliant, but it's also a snapshot in time. I couldn't realistically talk to 10 customers every day about every product decision. And the gap between those formal research sessions? That's where I was making hundreds of small choices that ultimately shaped how people experienced what we were building.
The LinkedIn post that started it all
As any founder has to be these days, you're also expected to be a content creator. So I was batching out LinkedIn posts, trying to build our brand and share industry insights. One day, I quickly wrote something up, didn't give it a second thought, and hit publish.
The reactions were brutal. People completely misinterpreted what I was trying to say, and not in good ways.
I sat there reading the comments thinking "how did I get this so wrong?" That's when it hit me like a truck: I was creating everything - posts, features, messaging, product decisions - completely trapped in my own bubble.
The epiphany
That LinkedIn disaster made me realize something bigger. All those customer conversations I'd had were incredibly valuable, but they couldn't be with me every day when I was making the thousands of micro-decisions that shape a product.
Should I word this feature description this way or that way? Will users understand this interface flow? Is this pricing page going to make sense to them? Every single day, I needed that customer perspective, but I couldn't exactly fire off Calendly invites for every small decision.
I started thinking: what if I could have AI versions of those customers I'd interviewed? Personas that thought like them, reacted like them, and could give me their perspective in real-time while I'm building?
Not generic AI that helps you write better. AI personas that actually think like your real customers and can see what you're working on - whether that's code, designs, presentations, or campaigns.
Building TestFeed
That's what became TestFeed. I started building it as an internal tool, honestly just trying to regain some confidence in my own decision-making. A prototype that could give me other perspectives when I needed them most.
And then something unexpected happened - it actually worked. Like, really worked.
Now I use it every single day. When I'm working on features and wondering if the flow makes sense. When I'm reviewing designs and need a user's honest take. When I'm writing a LinkedIn post and want to know if I won't get cancelled. When I'm prepping pitch decks and need to stress-test my messaging.
Our early users are the same. They've built it into their daily workflow - developers getting customer feedback on localhost, designers pressure-testing interfaces in Figma, marketers validating campaign ideas, founders rehearsing investor presentations. They're getting multiple perspectives from AI personas across every part of building their products.
I genuinely love what we've built. Not in a "proud founder" way, but in a "holy shit this actually solves the problem I had" way.
The journey continues
I'm building this in public because I've learned that building in isolation leads to products nobody wants. You can follow along on LinkedIn or X for the real, unfiltered journey.
If you've ever felt like you're making decisions in your own head, wondering what your customers would actually think, join our waitlist.
Because having customer perspective available 24/7 isn't just nice to have - it's how you build things people actually want.