Mailtrap vs Substack
Side-by-side plans, pricing, and feature gates for Mailtrap and Substack, verified . Mailtrap is primarily deliverability; Substack is primarily email marketing.
Plans side by side
Every published plan from each vendor, with the headline monthly anchor price. Some prices scale with subscriber count or seats; full detail lives on each tool's page.
Mailtrap
- Free
4,000 emails per month for hobby projects and early validation
Free - Basic
Entry paid Email API tier scaling from 10k to 100k emails per month
$15/mo - Business
Best value
$85/mo - Enterprise
1.5M+ emails per month with priority support and custom contracting
Custom
Substack
- Standard
Free to publish; 10% of paid subscription revenue
Free
When Mailtrap wins
- Dev teams that want one vendor for both email testing and production sending
- SaaS startups under 100k/month Email API volume who can ride the Basic tier ramp
- Teams that need a dedicated IP without paying for SendGrid Pro or higher
Where Mailtrap is the wrong fit
- Marketing-only teams (use Mailchimp or Kit)
- Buyers who want flat predictable per-tier pricing (Postmark is more predictable)
- Enterprises needing voice or SMS in the same platform (use Twilio or SendGrid)
When Substack wins
- New writers with no list yet who want platform-driven discovery
- Writers who would rather give 10% of revenue than pay a flat $20-100/month with no readers
Where Substack is the wrong fit
- Established creators with a paid list above ~5,000 subscribers; the 10% share exceeds what Kit, Ghost, or beehiiv would charge in flat fees at that scale
- Operators who want full control over deliverability, subscriber data, and migration optionality
- Brands needing automations, segmentation, or marketing tooling
Common questions
- Is Mailtrap cheaper than Substack?
- Both Mailtrap and Substack have free or custom entry pricing, so a direct entry-tier price comparison is not meaningful.
- Does Mailtrap or Substack have a free plan?
- Both have free plans. Mailtrap: 4,000 emails per month for hobby projects and early validation. Substack: Free to publish; 10% of paid subscription revenue.
- Are Mailtrap and Substack in the same category?
- No. Mailtrap is primarily a deliverability tool; Substack is primarily a email marketing tool. They overlap on use case but sit in different primary categories, so the comparison is between adjacent tools rather than direct competitors.
- Which has more plans, Mailtrap or Substack?
- Mailtrap ships 4 plans; Substack ships 1. Mailtrap's longer ladder gives more granular upgrade steps, which can mean smoother price escalation as your team scales.
- Where can I see alternatives to Mailtrap or Substack?
- Each tool has a dedicated alternatives page on TierGauge with ranked options and verified pricing: /alternatives/mailtrap for Mailtrap and /alternatives/substack for Substack. Alternatives are derived from each tool's editor-flagged competitors plus same-category tools we track.
Mailtrap: https://mailtrap.io/pricing/ · Substack: https://substack.com/going-paid
Last verified . Pricing changes between refreshes; confirm at the vendor before purchasing.