Email Marketing Platforms · reliability comparison
Constant Contact vs Mailchimp: which is more reliable? (2026)
Constant Contact is more reliable than Mailchimp, scoring 90.6 vs 55.1 out of 100. Over the last 90 days Constant Contact reported 4 incidents and Mailchimp reported 7, with effective uptime of 99.92% and 99.28% respectively. Constant Contact resolves incidents faster on average (1h 41m).
Data updated Nov 1, 2026 · How we score
| Metric | Constant Contact | Mailchimp |
|---|---|---|
| Reliability score | 90.6 | 55.1 |
| Rank (email marketing platforms) | #8 | #13 |
| Uptime (90 days) | 99.92% | 99.28% |
| Incidents (90 days) | 4 | 7 |
| Partial / major outages | 1 | 0 |
| Avg time to resolve | 1h 41m | 1d 1h |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Constant Contact and Mailchimp differ
- Mailchimp reported 75% more incidents than Constant Contact over the last 90 days (7 vs 4).
- Constant Contact had 1 partial or major outage, compared with 0 for Mailchimp.
- Constant Contact fixes problems faster: 1h 41m on average, against 1d 1h for Mailchimp (15.3× quicker).
- Constant Contact's longest outage on record lasted 1h 45m (Sep 2, 2026); Mailchimp's lasted 3d (Oct 9, 2026).
90-day uptime
Constant Contact
Mailchimp
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
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
Recent Mailchimp incidents
- Degraded performanceOct 29, 2026 · resolved (duration not published)
Access Issues and Errors Across Mailchimp
Affected: Access Issues and Errors Across Mailchimp
- Degraded performanceOct 27, 2026 · resolved in 1d 2h
Access Issues and Errors Across Mailchimp
Affected: Access Issues and Errors Across Mailchimp
- Degraded performanceOct 9, 2026 · resolved in 10d 12h
Cropped Images Disappearing in Campaigns
Affected: Cropped Images Disappearing in Campaigns
- Degraded performanceSep 11, 2026 · resolved in 2h 37m
Delayed updates to All Contacts table
Affected: Delayed updates to All Contacts table
- Degraded performanceAug 13, 2026 · resolved (duration not published)
Campaign links resulting in "500" errors.
Affected: Campaign links resulting in "500" errors.
- Degraded performanceAug 4, 2026 · resolved (duration not published)
Affected: Campaign Click Tracking Issue
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 →