Python Automation ROI: How I Replaced $400/Month in SaaS Tools With Free Scripts Every freelancer and small business owner is paying for tools they do not need. Here is exactly what I replaced and how. The SaaS Tax Before automation, my monthly SaaS bill was: Mailchimp: $99/month (email marketing) Calendly Pro: $12/month (scheduling) FreshBooks: $55/month (invoicing) Zapier: $49/month (automation) Airtable: $24/month (database) Total: $239/month = $2,868/year Now: $0/month (except hosting at $5/month). Mailchimp Replacement (Python + Gmail) import smtplib , csv , time from email.mime.text import MIMEText from email.mime.multipart import MIMEMultipart def send_newsletter ( csv_file , subject , html_body , sender , password ): smtp = smtplib . SMTP ( ' smtp.gmail.com ' , 587 ) smtp . starttls () smtp . login ( sender , password ) with open ( csv_file ) as f : subscribers = list ( csv .…