Substack by the Numbers: 35 Statistics Writers Should Know

50 million active subscriptions. Nearly 100,000 publications earning money globally. Gross writer revenue of $450 million in 2025.

Those are not projections. They are the latest figures from a platform that has become the most writer-friendly corner of the internet. Below, you'll find 35 Substack statistics organized by theme, with sources linked inline.

Key Takeaways

• Substack now has 50 million active subscriptions, with 5 million of those paid.
• Writers collectively earned $450 million in gross revenue through the platform in 2025.
• Nearly 100,000 publications earn money on Substack as of April 2026, up from 50,000 in May 2025.
• Substack email open rates average 44%, roughly twice the industry standard.
• The platform reached a $1.1 billion valuation following its July 2025 Series C round.

Platform Scale Statistics

Substack has grown from a small writing tool to a publishing platform that rivals established media outlets in reach and revenue.

1. Substack now has over 50 million active subscriptions as of April 2026. This figure includes multiple subscriptions per user, so the actual number of individual readers is lower, though still in the tens of millions.

2. The platform received 47.6 million unique website visitors in September 2025, a 65.85% increase compared to September 2024, signaling accelerating mainstream discovery.

3. Including traffic to publications on custom domains, Substack's ecosystem reaches around 169 million monthly website visitors, according to recent traffic estimates.

4. The keyword "Substack" attracts roughly 564,000 monthly searches, a signal of the platform's growing brand awareness outside its existing user base.

5. Substack's global footprint now spans over 150 countries, with international revenue accounting for a growing share of total platform income.

6. From 2020 to 2023, Substack's publication count grew by 10x. 60% of all current publications started after 2020.

Writer Community Statistics

The Substack creator base is larger than most people realize, and it skews toward writers with professional backgrounds.

7. As of April 2026, nearly 100,000 publications earn money globally on Substack. That number has doubled since May 2025, when 50,000 publications were monetizing. Around 30,000 of those are outside the United States.

8. More than 17,000 writers actively get paid through Substack, meaning they have at least one paying subscriber generating recurring income.

9. There are over 2 million active publications on Substack as of 2024. The gap between 2 million total publications and 100,000 monetizing ones reflects how many writers use the platform for free distribution only.

10. Roughly 30% of Substack writers come from journalism backgrounds, which partly explains the platform's credibility in news and politics categories.

11. 40% of Substack publications are free-only, meaning a large segment of creators have not yet activated a paid tier. For writers considering a subscription model, that's a significant untapped opportunity on the platform.

12. Internationally, 41% of Substack creators are based outside North America, with the platform actively adding localized payment options to support non-English writing communities.

Paid Subscription Statistics

Converting free readers to paid subscribers is the most important metric for any writer building a business on Substack.

13. 5 million paid subscriptions exist on Substack as of 2025. That figure has more than doubled from 2 million in 2024, pointing to a sharp acceleration in readers' willingness to pay for independent writing.

14. The average paid subscriber conversion rate on Substack is 3%. Put plainly, roughly 3 out of every 100 free subscribers will eventually pay. Larger, general-audience publications typically fall at 1-2%.

15. Specialized and niche publications convert at 4-10%. Writers covering narrow, high-interest topics (finance, specific technology, local politics) consistently outperform the average because their readers have a clearer reason to pay.

16. The tech category leads all categories with an 8% conversion rate, the highest on the platform. Finance, Business, and U.S. Politics are also top performers.

17. 10,000 publications have crossed 1,000 paid subscribers, a threshold many creators treat as proof of a sustainable newsletter business.

18. The most common price publications charge is $5 per month or $50 per year, which is Substack's minimum. Writers covering high-value niches like investment research or software engineering regularly charge $20-50 per month.

Revenue & Earnings Statistics

The money flowing through Substack has grown substantially each year, and not all of it concentrates at the top.

19. Gross writer revenue reached $450 million in 2025, up from $370 million in 2024 and $300 million in 2023.

20. Substack's own revenue, which comes from its 10% commission on paid subscriptions, was $45 million in 2025. The platform keeps roughly 10 cents of every dollar readers pay writers.

21. European writers alone collectively earn over $90 million through Substack, evidence that the subscription writing model works in markets well beyond the United States.

22. Among the broader international creator base, median annual creator earnings are around $4,000. Writers in the top quartile surpass $16,000 annually.

23. For micro-publishers (smaller independent newsletters), there was an 18% year-over-year rise in paid subscribers and a 21% jump in average monthly earnings per creator in recent data. The gains are not limited to the platform's biggest names.

Top Publication Statistics

The publications at Substack's peak reveal what's possible: substantial subscriber counts and income that rivals traditional media salaries.

24. The top 10 Substack publications earn over $25 million annually, with the group including names across finance, technology, and politics.

25. More than 50 publications earn at least $1 million per year through Substack subscriptions, a milestone that was nearly unthinkable for independent newsletters five years ago.

26. 45 publications have 500,000 or more subscribers, and 8 have crossed 1 million. The leading newsletter, Letters from an American by Heather Cox Richardson, has 2.9 million subscribers.

27. Finance, Business, U.S. Politics, Technology, and Health Politics are the five highest-earning categories on Substack, meaning writers in these verticals have the highest ceiling for subscription revenue.

28. Top creators at the platform's highest tier report monthly revenues exceeding $100,000, while many mid-tier creators earn between $2,000 and $10,000 per month, a range that covers full-time writing income in many markets.

Engagement Statistics

Substack's engagement data is the platform's strongest argument for the subscription newsletter format.

29. Substack email open rates average 44%, roughly double the email industry benchmark. The average open rate across all industries sits closer to 20-22%, making Substack's figure a meaningful advantage for writers building audience relationships.

30. The average click-through rate on Substack newsletters is 5.2% per email, well above standard marketing email benchmarks, which typically land under 3%.

31. Readers spend an average of 4 minutes on a Substack post, longer than the typical time-on-page for most editorial content online.

32. Paid subscribers engage with content at 3x the rate of free subscribers. For writers building a monetized list, the quality of a paying audience compounds: they read more, click more, and stay longer.

33. The average Substack reader subscribes to 5 newsletters per week, suggesting that dedicated Substack users treat the platform as a primary reading destination rather than an occasional one.

34. Substack's Notes feature, a short-form social layer launched in 2023, accumulated 50 million posts in its first year. Daily active Notes users now number around 1 million, creating a discovery channel that did not exist two years ago.

35. Substack's podcast network has grown to 10,000 shows, with 1 in 5 publications offering audio content. Writers who add audio to their newsletters tap an additional audience segment without leaving the platform.

What These Statistics Mean for Your Writing Career

The Substack data points to a clear structural shift in independent publishing: readers are paying, and the sums are real.

The 3% average conversion rate is the most useful benchmark to internalize. If you have 1,000 free subscribers, 30 of them will typically become paying readers. At $5 per month, that is $150 in monthly recurring revenue.

At $10, it's $300. Writers in technical or specialized niches can realistically expect higher conversions, given that tech categories hit 8% conversion rates. The math changes significantly as your list grows.

The doubling of paid publications from 50,000 to nearly 100,000 in one year tells you that the growth window is still open. The platform's trajectory has not peaked.

At the same time, the concentration of revenue in the top 50 publications (those earning $1M+) is a reminder that platform size does not equal income. Writers who reach sustainable income on Substack do so through audience specificity, consistent publishing, and a clear reason for readers to pay.

The 44% open rate matters beyond vanity metrics. It means your subscribers are actually reading what you write.

That attention advantage is the foundation of everything that converts: paid subscriptions, book deals, speaking invitations, and consulting work. Writers who build even a modest Substack audience own a direct line to readers that no algorithm can interrupt.

Conclusion

The numbers confirm what independent writers have sensed for several years: Substack has created a genuine alternative to institutional publishing. Gross writer revenue grew from $300 million in 2023 to $450 million in 2025, evidence that the platform's economic model is working for a widening group of creators.

The most actionable signal in the data is the 44% open rate. Your Substack readers will actually read what you write, and that attention is the raw material for every other outcome that matters to a writer's career.