Mailjet vs Substack: Complete Comparison (2026)
In comparing Mailjet and Substack in 2026, Substack is the stronger choice for writers wanting to launch and monetize a paid newsletter business due to free to start, no upfront cost. Mailjet excels for marketing teams needing collaborative email design with transactional delivery with real-time email collaboration. Mailjet offers Collaborative email editor, Transactional API, Segmentation starting at $15/mo with a free plan. Substack provides Newsletter publishing, Podcast hosting, Paid subscriptions from 10% of revenue with a free tier. For teams prioritizing value, Substack delivers a hiltonsoftware Score of 81/100. Mailjet and Substack compete in the email marketing segment of the SaaS market, where cloud-native solutions, API integrations, and workflow automation drive enterprise and SMB adoption. Other leading email marketing tools include Mailchimp, ConvertKit, Campaign Monitor. Mailjet serves 150K+ users globally (founded 2010) while Substack reports 35M+ readers active users (founded 2017).
Mailjet vs Substack at a Glance
What are the main differences between Mailjet and Substack?
Mailjet and Substack differ across ease of use, features, value, support, integrations, scalability, and learning curve. Substack leads in 6 of 7 categories.
What are the pros and cons of Mailjet vs Substack?
Which is better, Mailjet or Substack?
After evaluating Mailjet and Substack across features, pricing, integrations, and user satisfaction, Substack earns a higher hiltonsoftware Score of 81/100 versus Mailjet at 71/100. Substack stands out for "free to start, no upfront cost" and "large built-in discovery network". Mailjet delivers competitive advantages in "real-time email collaboration", making Mailjet a viable alternative.
Both Mailjet and Substack offer free plans. Mailjet paid plans start at $15/mo while Substack begins at 10% of revenue. ROI depends on which features justify upgrading.
Bottom line: Choose Mailjet for marketing teams needing collaborative email design with transactional delivery. Choose Substack for writers wanting to launch and monetize a paid newsletter business. Both Mailjet and Substack are established email marketing platforms.
Marketing teams needing collaborative email design with transactional delivery.
Writers wanting to launch and monetize a paid newsletter business.
Mailjet vs Substack: Frequently Asked Questions
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Reviewed by Marcus Johnson, Marketing & Growth Specialist. Last updated: 2026-04-24. Pricing verified: March 2026.
Read our scoring methodology to understand how the hiltonsoftware Score is calculated.