MailToolFinder

Sender vs Substack

Sender is a email marketing platform while Substack is a newsletter platform. Sender has been around since 2012, giving it a 5-year head start over Substack (founded 2017). Sender starts at $10/mo, while Substack is free. Their pricing is not measured the same way, so we don't rank them on price. Both offer free plans to get started. Sender has the edge with marketing automation, A/B testing, landing pages.

Quick Verdict

Sender wins on deliverability, rating, integrations.

Best for most users: Sender (small businesses).

Sender

Affordable email and SMS marketing

4.7/5 Free plan · from $10/mo

Sender offers one of the most generous free plans in email marketing, combined with built-in SMS capabilities. It's an excellent choice for budget-conscious businesses that need both email and SMS marketing without breaking the bank.

Try Sender

Substack

The newsletter platform where writers build independent media businesses

4.4/5 Free

Substack is the dominant newsletter platform that uniquely combines free publishing tools with a 10% revenue-share model, letting writers launch subscription-based media businesses with zero upfront cost. Beyond newsletters, it has evolved into a full creator ecosystem with podcasts, video, livestreaming, Notes (microblogging), and community Chat, backed by a powerful built-in discovery network that helps writers find audiences organically.

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Feature Comparison

Feature Sender Substack
Rating 4.7/5 4.4/5
Starting Price $10/mo Free
Free Plan 2,500 subscribers Unlimited subscribers, unlimited emails, all core features free — Substack only charges when you earn
Founded 2012 2017
Email Templates 50 1
Integrations 50 0
Deliverability Rate 97% 95%
Marketing Automation Yes No
A/B Testing Yes No
Landing Pages Yes No
Segmentation Yes No
Drag & Drop Editor Yes No
SMS Marketing Yes No
Ecommerce Features Yes No
API Access Yes No
Multi-Language Yes No
Web Push Notifications No No
Live Chat Yes No
Advanced Analytics No No
Try Sender Visit Substack

Sender: Pros & Cons

Pros

  • + Extremely generous free plan (2,500 subs, 15,000 emails)
  • + Built-in SMS marketing on all plans
  • + Very affordable paid plans
  • + Ecommerce integrations for abandoned cart
  • + No credit card required for free plan

Cons

  • − No A/B testing
  • − No landing page builder
  • − Smaller integration ecosystem
  • − Less well-known brand
  • − Limited advanced features

Substack: Pros & Cons

Pros

  • + Completely free to start with no upfront costs — zero barrier to entry with all core publishing features available immediately
  • + Built-in audience discovery network with Recommendations and Notes driving organic subscriber growth (users report gaining 1,000+ subscribers through Recommendations alone)
  • + True content ownership: creators can export their full subscriber list and content at any time to migrate elsewhere
  • + Multimedia platform supporting newsletters, podcasts, video, livestreaming, Notes, and Chat communities in a single integrated experience
  • + Strong reader engagement with genuine community interaction through comments, Chat, and Notes — higher engagement rates than typical social media platforms

Cons

  • − The 10% platform fee plus Stripe's ~2.9% + $0.30 per transaction creates a 13-16% total take rate that becomes very expensive at scale (e.g., $1,300-$1,600/month on $10K revenue)
  • − No email marketing automation, segmentation, A/B testing, or advanced personalization — all subscribers receive identical emails with no conditional logic
  • − No public API and zero native third-party integrations — cannot connect to CRMs, e-commerce platforms, Zapier, or other marketing tools
  • − Limited design customization with a single standardized template — no drag-and-drop editor, no custom HTML, and minimal branding options
  • − Platform can remove content or delete accounts without notice, and customer support is difficult to reach for issue resolution

The Verdict

Sender edges ahead with a 4.7/5 rating compared to Substack's 4.4/5. The gap comes mainly from feature depth (4.4 vs 3.8) and ease of use (4.8 vs 4.3). On deliverability, Sender reports 97% compared to 95% for Substack — a meaningful difference if inbox placement is critical for your campaigns.

Criterion Weight Sender Substack
Starting Price 30% $10/mo Free
Deliverability 25% 97% Winner 95%
Rating 25% 4.7/5 Winner 4.4/5
Integrations 10% 50 Winner 0
Free Tier 10% Yes Yes

Weights determine how much each criterion counts toward the final score. See full methodology

Choose Sender if…

  • + You need SMS marketing
  • + You need marketing automation
  • + You need ecommerce integrations
  • + You need API access for custom integrations

Choose Substack if…

  • + You're a independent writers and journalists
  • + You're a newsletter creators monetizing through paid subscriptions
  • + Completely free to start with no upfront costs — zero barrier to entry with all core publishing features available immediately
Try Sender Try Substack