Up to 4 at once.
| Criteria | Flowletter | Substack |
|---|---|---|
| Weighted Score | 3.6/5 | 3.6/5 |
| Pricing | $199/month flat (single Flowletter plan); contact sales for higher send volumes. | Free to publish; Substack takes a 10% commission on paid subscription revenue plus standard Stripe processing fees. |
| Platform Type | Email newsletter platform | Subscription management |
| Deliverability & inbox placement | 2.0/5 | 4.2/5 |
| Audience growth tools | 1.8/5 | 4.6/5 |
| Segmentation & automation | 3.0/5 | 1.5/5 |
| Monetisation | 4.0/5 | 4.7/5 |
| Editor & template design | 3.0/5 | 2.0/5 |
| Analytics after Apple Mail Privacy Protection | 1.5/5 | 3.0/5 |
| Integrations & API | 2.5/5 | 1.2/5 |
| Subscriber management & data portability | 4.5/5 | 4.0/5 |
| Compliance & list hygiene | 2.5/5 | 3.5/5 |
| Sending performance at scale | 2.3/5 | 4.0/5 |
| Strengths | ✓ Lower transaction fees than Substack for paid subscriptions ✓ Full subscriber data ownership and export | ✓ Direct-to-subscriber model ✓ Multimedia support |
| Limitations | ✗ Very limited features vs mature platforms like beehiiv or Mailchimp ✗ Small platform — growth and roadmap uncertain | ✗ Could do better with advanced content discovery features ✗ Substack takes 10% of revenue from paid subscriptions |
Flowletter
3.6
Rating
★ 3.6/5
Pricing
$199/month flat (single Flowletter plan); contact sales for higher send volumes.
Platform
Email newsletter platform
Scores
Deliverability & inbox placement
2.0
Audience growth tools
1.8
Segmentation & automation
3.0
Monetisation
4.0
Editor & template design
3.0
Analytics after Apple Mail Privacy Protection
1.5
Integrations & API
2.5
Subscriber management & data portability
4.5
Compliance & list hygiene
2.5
Sending performance at scale
2.3
Strengths
✓ Lower transaction fees than Substack for paid subscriptions
✓ Full subscriber data ownership and export
Limitations
✗ Very limited features vs mature platforms like beehiiv or Mailchimp
✗ Small platform — growth and roadmap uncertain
Substack
3.6
Rating
★ 3.6/5
Pricing
Free to publish; Substack takes a 10% commission on paid subscription revenue plus standard Stripe processing fees.
Platform
Subscription management
Scores
Deliverability & inbox placement
4.2
Audience growth tools
4.6
Segmentation & automation
1.5
Monetisation
4.7
Editor & template design
2.0
Analytics after Apple Mail Privacy Protection
3.0
Integrations & API
1.2
Subscriber management & data portability
4.0
Compliance & list hygiene
3.5
Sending performance at scale
4.0
Strengths
✓ Direct-to-subscriber model
✓ Multimedia support
Limitations
✗ Could do better with advanced content discovery features
✗ Substack takes 10% of revenue from paid subscriptions
