Core: HubSpot Starter
$20/month, CRM + basic email + forms. Covers most solo-founder needs. Don't over-buy; upgrade when you outgrow.
Automation: Zapier or Make
Wire HubSpot to Google Sheets, Calendly, Stripe, Typeform. No code needed. Most integrations pay for themselves the first month.
Analytics: GA4 + Plausible
GA4 for depth, Plausible for daily at-a-glance. $20/month total. Enough for 90% of solo-founder decision-making.