What is the difference between Substack and Resend?

Substack is best for Writers who want to monetize with paid subscriptions, while Resend is best for Developers wanting a modern email API. Substack starts at Free and Resend starts at Free.

Is Substack or Resend cheaper?

Substack starts at Free and is free. Resend starts at Free with a free tier.

Is there a free alternative to Resend?

Both Substack and Resend offer free tiers.

Substack vs Resend (2026) — notanothertool

At a glance

	Substack	Resend
Best for	Writers who want to monetize with paid subscriptions	Developers wanting a modern email API
Starting price	Free	Free
Free tier	✓	✓
Open source	—	—
Free tier available	✓	✓
Open source	—	—
API-First	—	✓
Analytics	—	✓
Community	✓	—
Discovery Network	✓	—
Mobile App	✓	—
Paid Subscriptions	✓	—
Podcasts	✓	—
React Email	—	✓
Webhooks	—	✓

Substack

Strengths

Free to use — takes 10% of paid subscriber revenue
Built-in discovery and recommendation network
Simple, distraction-free writing experience
Mobile app for readers

Weaknesses

10% revenue cut is steep at scale
Very limited customization
Basic analytics
No automation or segmentation

Try Substack → Full review

Resend

Strengths

Includes React Email as a core feature, purpose-built for email marketing workflows
Includes API-First as a core feature, purpose-built for email marketing workflows
Free for 3K emails/mo — generous enough for most small teams to get real work done
Includes webhooks alongside the core feature set — fewer separate tools needed

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Developer-oriented tooling may not suit non-technical team members
Deliverability depends on your sender reputation, which takes time to build
Limited team/admin features if your organization eventually scales up

Try Resend → Full review

The bottom line

Pricing: Both Substack and Resend are free. You can try both without spending a dollar.

Feature gaps: Substack offers Community, Discovery Network and Mobile App that Resend lacks. Resend brings API-First, Analytics and React Email that Substack does not have.

Team fit: Substack is geared toward individual users and small setups, while Resend is aimed at small teams teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Where each tool shines: Substack's biggest strengths are: free to use — takes 10% of paid subscriber revenue. built-in discovery and recommendation network. Resend's biggest strengths are: includes react email as a core feature, purpose-built for email marketing workflows. includes api-first as a core feature, purpose-built for email marketing workflows.

Watch out for: With Substack, users commonly note that 10% revenue cut is steep at scale. With Resend, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose Substack if...

You need a tool built for writers who want to monetize with paid subscriptions
You specifically need Community and Discovery Network
You care about built-in discovery and recommendation network
Your team size fits the individuals profile Substack is designed for

Choose Resend if...

Your profile matches its sweet spot: developers wanting a modern email api
You specifically need API-First and Analytics
You care about includes api-first as a core feature, purpose-built for email marketing workflows
Your team size fits the small teams profile Resend is designed for
The free tier works for you: free for 3k emails/mo