Plunk vs Substack

See how their public offers line up before you choose your own position. Prices stay in the currency, billing schedule, and charged unit each vendor publishes.

Plunk

See full pricing history

USD · US · source: www.useplunk.com

Plan	Pricing	Charged by	Offer type
Free forever	Free 1,000 emails / mo	Flat · 1,000 emails / mo	Standalone · Free
Pay as you grow	USD 0 per email $0.001 / email	Usage · email	Standalone · Usage based

Substack

See full pricing history

USD · US · source: substack.com

Plan	Pricing	Charged by	Offer type
Free publication	Free Free to publish without paid subscriptions	Flat · per month	Standalone · Free
Paid publication	Substack retains 10% of paid subscription revenue, plus card fees Substack retains 10% of paid subscription revenue, plus card fees	Usage · percentage of subscription revenue	Standalone · Usage based

What each plan includes

Feature names follow each vendor’s own pricing page, so verify the wording before treating them as exact equivalents.

Plunk

Free forever

Highlights No credit card required: Included
Highlights Transactional emails: Included
Highlights Workflow automation: Included
Highlights Campaign broadcasts: Included
Highlights Custom domains: Included
Highlights Click & open tracking: Included
Highlights Unlimited contacts: Included
Highlights Plunk branding on emails: Included

Pay as you grow

Highlights Everything in Free: Included
Highlights No Plunk branding: Included
Highlights Monthly spend cap: Included
Highlights Unlimited emails: Included

Substack

Free publication

Plan card Newsletter publishing: Included
Plan card Subscriber management: Included
Plan card Hosted publication website: Included

Paid publication

Plan card Writer revenue share: 90% before card fees

Included
Plan card Paid subscriptions: Included
Plan card Audience analytics: Included

How their prices changed

Each date shows when a public price was observed, not when it took effect. An archived region or currency can differ, so a currency change is not necessarily a price increase.

Plunk

September 21, 2026
Official pricing page
- Free forever: Free
- Pay as you grow: USD 0 per email
August 27, 2026
Official pricing page
- Free — Free: Free
- Paid — Pay as you grow: $0.001 per email

Substack

August 27, 2026
Official pricing page
- Free publication: Free
- Paid publication: Substack retains 10% of paid subscription revenue, plus card fees