Email Marketing Platforms · reliability comparison
HubSpot Marketing Hub vs Klaviyo: which is more reliable? (2026)
HubSpot Marketing Hub is more reliable than Klaviyo, scoring 96.2 vs 62.2 out of 100. Over the last 90 days HubSpot Marketing Hub reported 10 incidents and Klaviyo reported 13, with effective uptime of 100% and 99.26% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | HubSpot Marketing Hub | Klaviyo |
|---|---|---|
| Reliability score | 96.2 | 62.2 |
| Rank (email marketing platforms) | #5 | #11 |
| Uptime (90 days) | 100% | 99.26% |
| Incidents (90 days) | 10 | 13 |
| Partial / major outages | 0 | 5 |
| Avg time to resolve | — | 3h 39m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where HubSpot Marketing Hub and Klaviyo differ
- Klaviyo reported 30% more incidents than HubSpot Marketing Hub over the last 90 days (13 vs 10).
- Klaviyo had 5 partial or major outages, compared with 0 for HubSpot Marketing Hub.
- HubSpot Marketing Hub's longest incident on record lasted 3d (Jul 14, 2026); Klaviyo's lasted 2d 1h (May 5, 2026).
90-day uptime
HubSpot Marketing Hub
Klaviyo
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent HubSpot Marketing Hub incidents
- InformationalOct 23, 2026 · resolved in 2h 47m
Some HubSpot tools may be unavailable for some users
Affected: CRM, Marketing Tools, Website, Sales Tools, Service Tools, Chat & Automation +5 more
- InformationalOct 22, 2026 · resolved in 1h 53m
- InformationalOct 8, 2026 · resolved in 1h 35m
Marketing email statistics are delayed
Affected: Marketing Tools, Reports
- InformationalOct 2, 2026 · resolved in 1h 53m
HubSpot is experiencing issues
Affected: CRM, Marketing Tools, Chat & Automation
- InformationalSep 23, 2026 · resolved in 13m
- InformationalSep 8, 2026 · resolved in 59m
Recent Klaviyo incidents
- Partial outageOct 29, 2026 · resolved in 2h 10m
Campaign Sending Delaysofficial update ↗
Affected: Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending
- InformationalOct 28, 2026 · resolved in 23h 43m
Affected: Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending, Processing
- Partial outageOct 22, 2026 · resolved in 14h 47m
Outbound Webhook Delaysofficial update ↗
Affected: Analytics
- Partial outageOct 17, 2026 · resolved in 4h 49m
Flow Sending Delaysofficial update ↗
Affected: Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending, Flow Editor, Processing
- Degraded performanceOct 9, 2026 · resolved in 2h 6m
Analytics Events Processing Delays
Affected: Segments, Profiles, Analytics
- Major outageOct 8, 2026 · resolved in 1h 13m
Login and page loading issuesofficial update ↗
Affected: Klaviyo App
Other email marketing platforms to consider
- Drip · #1 · 100% uptime
- MailerLite · #2 · 100% uptime
- Omnisend · #3 · 100% uptime
- AWeber · #4 · 100% uptime
See the full most reliable email marketing platforms ranking →