Side-by-side comparison
Klaviyo vs Substack
Complaint records and Risk Scores compared. Both are in the Email Marketing category.
✓ Substack has a lower documented Risk Score.
Substack's Risk Score of 20 is lower than Klaviyo's 100.
That said, always read the full complaint records before deciding.
Product A
Klaviyo
E-commerce email and SMS platform with rapidly-escalating pricing
100
Severe
out of 100
11 documented warnings
Email Marketing
Email Marketing
✓ Lower risk
Full Substack record →
Product B
Substack
Newsletter and podcast platform that takes 10% of paid subscription revenue
20
Mixed Signals
out of 100
2 documented warnings
Email Marketing
Email Marketing
Complaint category breakdown
Higher numbers in each row indicate more documented complaints in that category. Bold = more complaints than the other product.
| Complaint type | Klaviyo | Substack |
|---|---|---|
| BBB Complaints | — | — |
| Lawsuits & Legal Action | 1 | — |
| Misleading Marketing | 1 | — |
| Customer Complaints | 3 | 1 |
| Churn & Retention | 1 | — |
| Billing Problems | 4 | 1 |
| Support Failures | 1 | — |
Severity breakdown
| Severity | Klaviyo | Substack |
|---|---|---|
| Critical | 1 | — |
| High | 6 | — |
| Medium | 4 | 1 |
| Low | — | 1 |