c0nrad

First company was csper.io (2019), took maybe 3 months till I had my first customer, and then around month 6 I started getting ~1 customer/week, and continued scaling after that. Felt pretty comfortable with the idea and didn't need to pivot/drop.

Second/current one, dmarcdefender.io (2025), took maybe 6 months till I had my first customer, but now it's growing much slower. There's a lot more competition and still trying to figure out where I fit in / how to market it among all the competition. I was originally positioned as a security focused product, but now pivoting to more of a marketing/deliverability product. But to be honest not really sure where it's going, but still fighting the fight.

Thanks for the feedback! The domain checker tool is completely free and unrelated to the subscription. The subscription is for dmarc monitoring (I collect the dmarc aggregation reports and provide insights). I'll see if I can make that more clear.

Not sure if this is interesting to the HN crowd, but some challenge writeups from a recent security Capture the Flag competition.

Going back to school for Physics (age 30). It'd be cool to understand why the universe exists before I die.