Substack vs Mailchimp: Creator Newsletters vs Business Email Campaigns

Introduction

Email remains one of the most powerful digital marketing channels despite the rise of social media, podcasts, and short-form video. Unlike platforms that control audience access through algorithms, email gives creators and businesses direct ownership of their audience relationships.

Two platforms dominate different sides of the email ecosystem: Substack and Mailchimp.

At first glance, both allow users to send newsletters. However, their purposes, audiences, and business models are fundamentally different. Substack was built for writers, journalists, and creators who want to publish content and monetize subscriptions. Mailchimp was designed for businesses seeking sophisticated email marketing, customer engagement, automation, and sales growth.

Understanding these differences is critical because choosing the wrong platform can limit growth, reduce revenue opportunities, or create unnecessary complexity.

This article explores the key differences between Substack and Mailchimp, examines their strengths and weaknesses, and presents a real-world case study showing how each platform serves different goals.

Understanding Substack

Launched in 2017, Substack transformed newsletter publishing by making it easy for writers to earn money directly from readers.

The platform combines three functions into one:

• Content publishing
• Email distribution
• Subscription monetization

Instead of building a website, integrating payment systems, and managing email infrastructure separately, creators can publish articles and deliver them directly to subscribers through email.

Substack’s primary audience includes:

• Independent journalists
• Writers
• Thought leaders
• Industry experts
• Podcasters
• Content creators

The platform emphasizes simplicity and audience ownership.

Key Features

Paid Subscriptions

Creators can charge monthly or annual fees for premium content.

Built-In Publishing

Every newsletter doubles as a blog post on a public Substack website.

Reader Discovery

Substack offers recommendations, rankings, and cross-promotions between newsletters.

Community Features

Comments, discussion threads, and subscriber interactions are integrated directly into the platform.

Podcast Hosting

Creators can distribute audio content through the same subscription system.

Advantages

• Easy setup
• No technical knowledge required
• Built-in monetization
• Integrated publishing platform
• Strong creator ecosystem

Limitations

• Limited marketing automation
• Basic segmentation
• Few e-commerce integrations
• Less customization
• Not designed for complex customer journeys

Substack excels when content itself is the product.

Understanding Mailchimp

Mailchimp began as an email marketing service and evolved into a comprehensive marketing platform.

Its core purpose is helping businesses communicate with customers, generate leads, and increase sales.

Unlike Substack, Mailchimp is not primarily a publishing platform. Instead, it focuses on customer relationship management and marketing automation.

Mailchimp serves:

• Small businesses
• Startups
• E-commerce stores
• Agencies
• SaaS companies
• Nonprofits

Key Features

Advanced Email Campaigns

Create promotional emails, newsletters, announcements, and sales campaigns.

Audience Segmentation

Target subscribers based on behavior, demographics, purchases, or engagement.

Marketing Automation

Build automated workflows triggered by specific actions.

E-commerce Integrations

Connect with online stores and customer databases.

Analytics

Track conversions, clicks, purchases, and campaign performance.

Landing Pages

Create lead-generation pages without external tools.

Advantages

• Powerful automation
• Detailed analytics
• Advanced segmentation
• CRM functionality
• Strong integrations

Limitations

• Steeper learning curve
• More expensive at scale
• No built-in paid newsletter system
• Requires external content monetization strategies

Mailchimp excels when email supports a broader business objective.

Feature-by-Feature Comparison

1. Primary Purpose

Substack

Substack helps creators monetize content.

The newsletter is the business.

Mailchimp

Mailchimp helps businesses market products and services.

The newsletter supports the business.

Winner: Depends on goals.

2. Ease of Use

Substack prioritizes simplicity.

A creator can:

1. Sign up
2. Write a post
3. Publish
4. Start collecting subscribers

Within minutes.

Mailchimp offers more capabilities but requires setup and configuration.

Users must manage:

• Audiences
• Tags
• Automations
• Templates
• Integrations

Winner: Substack

3. Monetization

Substack was built around subscription revenue.

Creators can:

• Offer free newsletters
• Create premium memberships
• Charge monthly fees
• Charge annual fees

Mailchimp does not process paid newsletter subscriptions natively.

Businesses typically monetize through:

• Product sales
• Consulting
• Services
• Courses
• Membership platforms

Winner: Substack

4. Marketing Automation

This is where Mailchimp dominates.

Examples include:

• Welcome sequences
• Abandoned cart reminders
• Lead nurturing
• Customer onboarding
• Re-engagement campaigns

Substack offers minimal automation.

Winner: Mailchimp

5. Audience Growth

Substack includes built-in discovery mechanisms.

Readers can find newsletters through:

• Recommendations
• Network effects
• Platform rankings

Mailchimp relies on external acquisition channels such as:

• SEO
• Social media
• Advertising
• Lead magnets

Winner: Substack

6. Design Flexibility

Mailchimp offers:

• Custom templates
• Brand customization
• Dynamic content
• HTML editing

Substack intentionally keeps design simple.

Winner: Mailchimp

7. Analytics

Mailchimp provides detailed marketing metrics including:

• Open rates
• Click-through rates
• Conversion tracking
• Revenue attribution
• Customer behavior

Substack provides simpler engagement analytics.

Winner: Mailchimp

8. Scalability

For large organizations, Mailchimp offers significantly more operational flexibility.

Businesses can manage:

• Multiple customer segments
• Automated campaigns
• Sales funnels
• CRM workflows

Substack scales well for creators but not for enterprise marketing.

Winner: Mailchimp

Case Study: The Independent Financial Writer

To understand the practical differences between the platforms, consider the fictional but realistic example of Sarah, an independent financial analyst.

Background

Sarah spent ten years working in investment research.

She decided to leave corporate employment and build an independent audience around:

• Market analysis
• Investment education
• Economic commentary

Her goal was to earn income directly from readers.

Scenario 1: Sarah Uses Substack

Sarah launches a weekly newsletter called “Market Signals.”

She publishes:

• Weekly analysis
• Stock market insights
• Economic forecasts

Growth Strategy

She leverages:

• LinkedIn content
• Podcast appearances
• Substack recommendations

Within one year she reaches:

• 15,000 free subscribers
• 1,200 paid subscribers

Pricing

She charges:

• $10/month
• $100/year

Revenue

Assuming an average annual subscription value of $100:

1,200 × $100 = $120,000 annually

After platform fees and payment processing costs, she still generates a six-figure creator business.

Why Substack Worked

Her audience pays for expertise.

Content is the product.

She does not need:

• Sales funnels
• Product catalogs
• Complex automation

Substack handles everything.

Scenario 2: Sarah Uses Mailchimp

Instead of charging for content, Sarah uses Mailchimp.

Her newsletter remains free.

She monetizes through:

• Consulting
• Financial courses
• Corporate training

Marketing Funnel

Subscribers receive:

Email 1: Welcome sequence

Email 2: Free investment guide

Email 3: Educational content

Email 4: Webinar invitation

Email 5: Course promotion

Email 6: Consulting offer

Results

After one year:

• 15,000 subscribers
• 200 course sales at $500 each
• Revenue = $100,000
• Consulting contracts = $80,000

Total revenue:

$180,000+

Why Mailchimp Worked

The newsletter supports service sales.

The business is not the newsletter.

The business is consulting and education.

Mailchimp’s automation increases conversions.

Case Study: E-Commerce Business

Consider a second example.

Company: UrbanFit Apparel

UrbanFit sells athletic clothing online.

Their goal is increasing product sales.

Using Substack

They publish articles about:

• Fitness
• Nutrition
• Training

Subscribers enjoy the content.

However, they struggle with:

• Customer segmentation
• Purchase tracking
• Automated promotions

Sales impact remains limited.

Using Mailchimp

The company creates automated workflows.

Workflow 1

Customer visits product page.

No purchase occurs.

Abandoned cart email is triggered.

Workflow 2

Customer buys running shoes.

Follow-up emails recommend:

• Socks
• Apparel
• Accessories

Workflow 3

Inactive customers receive discounts.

Results

Open rates improve.

Conversions increase.

Customer lifetime value rises.

Revenue grows directly.

Conclusion

For e-commerce, Mailchimp clearly outperforms Substack.

Cost Comparison

Substack

Substack is free until creators earn revenue.

The platform typically takes a percentage of paid subscription income, alongside payment processing fees.

Advantages:

• Low startup cost
• Revenue-aligned pricing

Disadvantages:

• Costs increase as subscription revenue grows

Mailchimp

Mailchimp offers free and paid plans.

Pricing generally increases based on:

• Subscriber count
• Features used
• Automation requirements

Advantages:

• Predictable pricing
• Strong business capabilities

Disadvantages:

• Can become expensive with large email lists

Who Should Choose Substack?

Substack is ideal for:

Writers

People whose expertise is their primary product.

Journalists

Independent reporting and analysis businesses.

Coaches

Subscription-based educational content.

Podcasters

Premium subscriber communities.

Thought Leaders

Audience-first personal brands.

Choose Substack if your revenue comes directly from content.

Who Should Choose Mailchimp?

Mailchimp is ideal for:

E-Commerce Stores

Driving product sales.

SaaS Companies

Lead nurturing and customer onboarding.

Agencies

Managing client communications.

Consultants

Generating leads and converting prospects.

Small Businesses

Building long-term customer relationships.

Choose Mailchimp if email supports broader business objectives.

Can You Use Both?

Yes.

Many successful creators and businesses use both platforms strategically.

For example:

Substack

• Premium content
• Community building
• Subscriber revenue

Mailchimp

• Marketing campaigns
• Product launches
• Lead generation
• Customer automation

A creator might publish premium analysis on Substack while using Mailchimp to sell courses, workshops, or consulting services.

This hybrid model combines content monetization with sophisticated marketing capabilities.

Substack vs Mailchimp: The History of Creator Newsletters vs Business Email Campaigns

Introduction

Email has been declared dead many times, yet it remains one of the most powerful communication channels on the internet. While social media platforms rise and fall, email continues to provide a direct connection between publishers and audiences. Over the past two decades, two distinct approaches to email publishing have emerged: creator newsletters and business email campaigns.

At the center of these approaches stand two influential platforms—Substack and Mailchimp. Although both involve sending emails to subscribers, they were built for very different purposes. Mailchimp emerged as a marketing tool for businesses seeking customer engagement and sales. Substack was created as a publishing platform for writers seeking independence and direct relationships with readers.

The story of Substack versus Mailchimp is not merely a comparison of software features. It reflects a broader transformation in digital media, entrepreneurship, publishing, and the creator economy. Understanding their history reveals how online communication evolved from corporate marketing to individual publishing.

The Early Era of Email Marketing

Before social media dominated the internet, email was one of the primary methods businesses used to communicate with customers. During the late 1990s and early 2000s, companies began building email lists to promote products, share updates, and drive sales.

However, managing large mailing lists was difficult. Businesses needed software that could:

• Collect subscriber information
• Organize audiences
• Design professional emails
• Track open rates and clicks
• Comply with anti-spam regulations

This need created opportunities for email marketing software providers.

The Birth of Mailchimp

Mailchimp was founded in 2001 by Ben Chestnut and Dan Kurzius. Initially, the company operated as a side project while its founders ran a web design business. Small businesses frequently requested tools for email marketing, leading the founders to create a platform specifically for that purpose.

Unlike expensive enterprise solutions available at the time, Mailchimp targeted small and medium-sized businesses. It offered a simpler, more accessible way to create and distribute marketing emails.

The company grew steadily throughout the 2000s as online commerce expanded. Businesses increasingly relied on email campaigns to maintain customer relationships and generate revenue.

Mailchimp’s success came from solving practical marketing challenges:

• Email automation
• Audience segmentation
• Campaign analytics
• E-commerce integrations
• Customer relationship management

By focusing on marketers rather than publishers, Mailchimp became one of the world’s most recognized email marketing platforms.

The Rise of Content Marketing

The 2010s marked a major shift in digital communication. Businesses realized that customers were becoming resistant to traditional advertising. Instead of simply promoting products, companies began publishing useful content.

This trend became known as content marketing.

Brands started producing:

• Blog posts
• Industry reports
• Educational guides
• Video content
• Newsletters

Mailchimp benefited greatly from this transition. Email campaigns evolved beyond sales promotions into content distribution channels.

A weekly newsletter from a company became a way to build trust and authority. Marketing teams used Mailchimp not only to sell products but also to cultivate long-term audience engagement.

The platform expanded rapidly by adding features such as:

• Landing pages
• Customer journeys
• Behavioral targeting
• Marketing automation
• Audience insights

By the late 2010s, Mailchimp had become a comprehensive marketing ecosystem rather than just an email tool.

The Social Media Problem

While businesses refined email marketing, writers and independent creators faced a different challenge.

During the 2000s and 2010s, platforms such as blogs, Facebook, Twitter, YouTube, and Instagram became the dominant channels for audience building.

At first, these platforms appeared revolutionary. Creators could reach millions of people without owning their own websites.

However, a major problem emerged: platform dependency.

Creators discovered that:

• Algorithms controlled visibility.
• Platform policies could change overnight.
• Advertising revenue was unpredictable.
• Audiences technically belonged to the platform.

Many journalists, writers, and experts spent years building audiences on social networks only to find themselves vulnerable to algorithm changes.

This created growing interest in audience ownership.

Email became attractive because it offered direct access to subscribers without relying on social media feeds.

Yet existing email platforms were often designed for marketers rather than writers.

There was a gap in the market.

The Founding of Substack

Substack was founded in 2017 by Chris Best, Hamish McKenzie, and Jairaj Sethi.

The founders recognized that many writers wanted an alternative to advertising-supported media and algorithm-driven platforms. Their vision was simple:

Enable writers to publish directly to readers and earn revenue through subscriptions.

Instead of focusing on marketing automation, Substack emphasized publishing.

The platform combined three core functions:

1. Writing
2. Email distribution
3. Subscription payments

This combination was significant because it removed technical barriers that previously prevented writers from monetizing newsletters.

A creator could:

• Start a publication
• Collect subscribers
• Send emails
• Charge readers

All from a single interface.

Substack took a percentage of subscription revenue rather than charging traditional software fees.

This aligned the company’s incentives with creator success.

The Newsletter Renaissance

Substack emerged during what many observers call the newsletter renaissance.

Several trends contributed to its rise:

Declining Trust in Social Media

Creators increasingly sought independence from platform algorithms.

Challenges Facing Journalism

Traditional media organizations experienced layoffs, declining advertising revenue, and shrinking newsroom budgets.

Many journalists looked for alternative income streams.

Growth of the Creator Economy

People increasingly built careers around content creation rather than traditional employment.

Subscription Fatigue with Advertising

Audiences became more willing to pay directly for quality content.

Substack capitalized on these trends by positioning newsletters as standalone media businesses.

The platform transformed newsletters from marketing tools into products.

Different Philosophies

Although Substack and Mailchimp both send emails, their philosophies differ fundamentally.

Mailchimp: Business-Centric Communication

Mailchimp views email as part of a broader customer journey.

The objective is often:

• Lead generation
• Customer retention
• Product promotion
• Revenue growth

Subscribers are potential customers.

Success is measured through metrics such as:

• Conversion rates
• Sales
• Customer lifetime value
• Return on investment

Substack: Creator-Centric Publishing

Substack views email as a publishing medium.

The objective is often:

• Audience building
• Thought leadership
• Journalism
• Independent media creation

Subscribers are readers rather than customers.

Success is measured through:

• Subscriber growth
• Engagement
• Paid memberships
• Community loyalty

This distinction explains many differences between the platforms.

How Monetization Changed the Industry

One of Substack’s most important contributions was normalizing paid newsletters.

Before Substack, many writers struggled to monetize email directly.

Common approaches included:

• Advertising
• Sponsorships
• Consulting
• Product sales

Substack simplified subscription publishing.

Writers could charge monthly or annual fees and receive recurring revenue.

This model inspired competitors including:

• Ghost
• Beehiiv
• Patreon integrations
• ConvertKit’s creator tools

The entire newsletter industry shifted toward creator monetization.

Mailchimp, meanwhile, remained focused on helping businesses generate revenue indirectly through marketing activities.

The Creator Economy Boom

The COVID-19 pandemic accelerated digital publishing.

Remote work, online learning, and increased internet usage contributed to a surge in newsletter readership.

Substack experienced rapid growth as:

• Journalists launched independent publications.
• Experts shared niche knowledge.
• Writers built direct subscriber relationships.

The platform became associated with the broader creator economy movement.

Creators increasingly viewed themselves as businesses.

Rather than relying on employers or media organizations, they could build sustainable revenue through audiences.

Substack became one of the most visible symbols of this shift.

Mailchimp’s Evolution into a Marketing Platform

While Substack expanded among creators, Mailchimp continued evolving.

The company increasingly positioned itself as a marketing platform rather than an email service.

Its features expanded into:

• Customer data management
• Automation workflows
• Audience analytics
• Digital advertising
• Website creation
• E-commerce support

The transformation reflected changing business needs.

Companies wanted unified systems that connected marketing, sales, and customer engagement.

Mailchimp adapted by becoming more comprehensive.

In 2021, financial software giant Intuit acquired Mailchimp for approximately $12 billion, highlighting the strategic value of customer communication platforms.

The acquisition represented the maturation of email marketing as an essential business function.

The Modern Newsletter Landscape

Today, Substack and Mailchimp occupy overlapping but distinct positions.

Who Uses Mailchimp?

Mailchimp is commonly used by:

• Small businesses
• Retail brands
• Nonprofits
• Agencies
• E-commerce companies
• Corporate marketing teams

Its strength lies in marketing sophistication.

Who Uses Substack?

Substack is commonly used by:

• Journalists
• Writers
• Analysts
• Researchers
• Industry experts
• Independent creators

Its strength lies in publishing simplicity and monetization.

The choice between them often depends less on email features and more on business models.

Convergence and Competition

Interestingly, the two platforms have begun moving closer together.

Substack has introduced:

• Community features
• Recommendations
• Social discovery tools
• Multimedia publishing

Mailchimp has expanded beyond email into content distribution and audience management.

Meanwhile, newer competitors have emerged.

Platforms such as Beehiiv and ConvertKit attempt to combine creator-focused publishing with sophisticated marketing capabilities.

As a result, the boundary between newsletters and marketing campaigns continues to blur.

A newsletter can simultaneously function as:

• A media product
• A community hub
• A marketing channel
• A revenue source

The future likely belongs to platforms that integrate these functions effectively.

Lessons from the Substack vs Mailchimp Story

The history of Substack and Mailchimp reflects broader changes in the internet economy.

Several lessons stand out.

Ownership Matters

Creators increasingly value owning relationships with their audiences.

Email remains one of the few channels where audience access is relatively independent of algorithms.

Business Models Shape Platforms

Mailchimp was built for businesses.

Substack was built for publishers.

Their product decisions reflect these origins.

Monetization Drives Innovation

Subscription revenue transformed newsletters from marketing assets into standalone businesses.

Email Remains Resilient

Despite predictions of decline, email continues to thrive because it offers direct, reliable communication.

Conclusion

The story of Substack versus Mailchimp is ultimately a story about two different visions of digital communication.

Mailchimp emerged in the early internet era to help businesses market products and build customer relationships. Its growth mirrored the rise of e-commerce, content marketing, and data-driven customer engagement.

Substack emerged in a later era shaped by creator independence, media disruption, and subscription-based publishing. It empowered writers to own their audiences and earn revenue directly from readers.

Both platforms demonstrate the enduring power of email, but they serve different goals. Mailchimp represents the evolution of business marketing, while Substack represents the rise of creator-led publishing.

Together, they illustrate how a simple technology—email—became the foundation for two of the most important movements in modern digital communication: business email campaigns and creator newsletters.

As the creator economy continues to grow and businesses seek deeper customer relationships, the distinction between these worlds may continue to blur. Yet their histories reveal a fundamental truth: whether selling products or sharing ideas, the most valuable asset online is a direct connection to an audience.