Email Marketing Platforms · reliability comparison
ActiveCampaign vs Klaviyo: which is more reliable? (2026)
Klaviyo is more reliable than ActiveCampaign, scoring 62.2 vs 49.1 out of 100. Over the last 90 days ActiveCampaign reported 9 incidents and Klaviyo reported 13, with effective uptime of 98.11% and 99.26% respectively. Klaviyo resolves incidents faster on average (3h 39m).
Data updated Nov 1, 2026 · How we score
| Metric | ActiveCampaign | Klaviyo |
|---|---|---|
| Reliability score | 49.1 | 62.2 |
| Rank (email marketing platforms) | #13 | #11 |
| Uptime (90 days) | 98.11% | 99.26% |
| Incidents (90 days) | 9 | 13 |
| Partial / major outages | 7 | 5 |
| Avg time to resolve | 5h 36m | 3h 39m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where ActiveCampaign and Klaviyo differ
- Klaviyo reported 44% more incidents than ActiveCampaign over the last 90 days (13 vs 9).
- ActiveCampaign had 7 partial or major outages, compared with 5 for Klaviyo.
- Klaviyo fixes problems faster: 3h 39m on average, against 5h 36m for ActiveCampaign.
- ActiveCampaign's longest outage on record lasted 3d (Feb 10, 2026); Klaviyo's lasted 2d 1h (May 5, 2026).
90-day uptime
ActiveCampaign
Klaviyo
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent ActiveCampaign incidents
- Degraded performanceOct 27, 2026 · resolved in 35m
Delayed Processing for Imports, Exports, Bulk Actions, and Campaign sending.
Affected: Campaigns
- Major outageOct 22, 2026 · resolved in 8h 39m
System outage - 10/22/2026official update ↗
Affected: API Availability, Email, API Availability, API Availability, SMS, ARC & ARC Services +36 more
- InformationalOct 20, 2026 · resolved in 13m
- Partial outageOct 8, 2026 · resolved in 3h 23m
Whatsapp message responses delayedofficial update ↗
Affected: WhatsApp
- Major outageSep 28, 2026 · resolved in 3h 50m
Transactional Email Failuresofficial update ↗
Affected: Email
- Partial outageSep 14, 2026 · resolved in 26m
Bulk Edit of contacts is not applying filters.
Affected: CRM, CRM, CRM
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 →