Email Marketing Platforms · reliability comparison
Campaign Monitor vs Constant Contact: which is more reliable? (2026)
Constant Contact is more reliable than Campaign Monitor, scoring 90.6 vs 59.2 out of 100. Over the last 90 days Campaign Monitor reported 1 incident and Constant Contact reported 4, with effective uptime of 99.50% and 99.92% respectively. Constant Contact resolves incidents faster on average (1h 41m).
Data updated Nov 1, 2026 · How we score
VS
| Metric | Campaign Monitor | Constant Contact |
|---|---|---|
| Reliability score | 59.2 | 90.6 |
| Rank (email marketing platforms) | #12 | #8 |
| Uptime (90 days) | 99.50% | 99.92% |
| Incidents (90 days) | 1 | 4 |
| Partial / major outages | 0 | 1 |
| Avg time to resolve | 3d | 1h 41m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Campaign Monitor and Constant Contact differ
- Constant Contact reported 4× as many incidents as Campaign Monitor over the last 90 days (4 vs 1).
- Constant Contact had 1 partial or major outage, compared with 0 for Campaign Monitor.
- Constant Contact fixes problems faster: 1h 41m on average, against 3d for Campaign Monitor (42.7× quicker).
- Campaign Monitor's longest outage on record lasted 1h 9m (Jul 16, 2026); Constant Contact's lasted 1h 45m (Sep 2, 2026).
90-day uptime
Campaign Monitor
Constant Contact
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Campaign Monitor incidents
- Degraded performanceSep 4, 2026 · resolved in 17d 1h
- MaintenanceAug 9, 2026 · resolved in 1h 10m
Recent Constant Contact incidents
- Degraded performanceOct 1, 2026 · resolved in 57m
Delays in email campaign sending
Affected: Email Campaigns
- Degraded performanceSep 16, 2026 · resolved in 30m
Slow website navigation and email delivery
Affected: Email Campaigns
- Degraded performanceSep 14, 2026 · resolved in 3h 33m
Unable to view partner organization reporting
Affected: Reporting
- Partial outageSep 2, 2026 · resolved in 1h 45m
Affected: Login
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 →