Launching a security tool on PH as a solo founder — need advice

I'm launching Scanward on March 3rd — a domain security scanner that checks SSL, DNS, headers, email security, and uptime in one scan.

I built it because every decent attack surface monitoring tool costs $500+/month and targets enterprises. Small teams and indie devs deserve to know if their SSL is expiring or their DMARC is misconfigured without paying enterprise prices.

I'm a solo, bootstrapped DevOps engineer. No marketing budget. No big following. Just a product that works.

For those who've launched here before:

• How did you position a "serious" B2B tool on PH where fun/consumer products tend to shine?

• Did your PH launch lead to actual paying customers, or mostly free signups?

• Any advice for a solo founder with no marketing muscle?

Genuinely curious — not looking for generic tips, I want real stories :)