The SaaS Tax Benchmark

Calculating the True Cost ofMailchimp vs Custom.

Calculate the true 5-year cost of Mailchimp vs custom email marketing. Growing companies pay $4K–$18K/year in subscriber-based fees.

Why Companies Outgrow Mailchimp

Subscriber-based pricing means you pay more as your audience grows — penalizing marketing success

Contact limits force painful list pruning or expensive tier upgrades

Advanced segmentation and automation locked behind Premium tier

Intuit acquisition has increased prices and reduced free tier features

Feature Matrix: Custom vs Mailchimp

Annual Cost

Standard Set$4K–$18K/year
Slickrock Build$15K build + $1.5K/year

Subscriber Pricing

Standard SetIncreases with list size
Slickrock BuildFixed cost at any list size

Automation Depth

Standard SetLimited on Standard plan
Slickrock BuildUnlimited custom workflows

Template Library

Standard SetExtensive pre-built options
Slickrock BuildCustom branded templates

Analytics

Standard SetBasic open and click tracking
Slickrock BuildCustom attribution and revenue tracking

Frequently Asked Questions

How much does Mailchimp cost per year?

Mailchimp Standard costs $13–$350/month depending on subscriber count. For a business with 50,000 subscribers, annual costs are $4,000–$18,000. Premium tier with advanced segmentation adds $350/month base.

Is custom email software cheaper than Mailchimp?

Yes for lists over 10,000 subscribers. A custom email system using Amazon SES or Postmark costs $15,000 to build with $1,500/year maintenance. SES charges pennies per thousand emails versus Mailchimp per-subscriber pricing.

Why are companies leaving Mailchimp?

Since the Intuit acquisition, Mailchimp has raised prices, reduced free tier limits, and added mandatory paid add-ons. Companies with large lists are migrating to custom infrastructure to eliminate subscriber-based pricing entirely.

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