# Customer.io in September 2026: incidents, uptime and changes

> Customer.io in September 2026: 3 incidents on its status page (0 major or critical), 100% free of major or critical incidents (vendor-reported). From Rewindex’s archive of Customer.io’s status, pricing and policy pages.

Canonical: https://rewindex.com/company/customer-io/2026/09
Last updated: 2026-10-01T00:00:00Z

- Incidents posted: 3 (major/critical: 0) · Maintenance: 0
- By vendor impact label: minor 2, none 1
- Uptime (vendor-reported): 100% free of major/critical incidents, 100% free of any incident; outage time 0 min, incident time 0 min
- Price changes: 0 · Pricing/legal/trust page changes: 0 · Deprecations: 0 · CVEs: 0
- Previous month: [August 2026](https://rewindex.com/company/customer-io/2026/08.md) · Next: [October 2026](https://rewindex.com/company/customer-io/2026/10.md) · [All months](https://rewindex.com/company/customer-io/reports.md) · [Customer.io](https://rewindex.com/company/customer-io.md)

_Uptime: Derived from the incidents the vendor posted on its own status page, not measured by us. A minute counts as an outage minute when a major or critical incident (as the vendor labelled it) was open; incident minutes include minor ones too. Maintenance and incidents marked "no impact" are left out, overlapping incidents are merged, a resolved incident counts for at most 7 days, and one still open with no resolution counts for at most 24 hours._

## All incidents

| Incident | Impact (vendor label) | Started (UTC) | Resolved (UTC) | Duration | Status |
| --- | --- | --- | --- | --- | --- |
| [Investigating issues with the Agent](https://rewindex.com/company/customer-io/incidents/f33fk5l95vqk.md) | minor | 2026-09-03 17:34 UTC | 2026-09-03 17:34 UTC | 0 min | resolved |
| [Reduced Deliverability to Microsoft-Hosted Email Addresses](https://rewindex.com/company/customer-io/incidents/7zy2yljd0z5r.md) | none | 2026-09-04 13:35 UTC | 2026-09-04 13:35 UTC | 0 min | resolved |
| [Some US customers may experience delays in message sending](https://rewindex.com/company/customer-io/incidents/lhl2rp8zqqlm.md) | minor | 2026-09-19 23:17 UTC | 2026-09-19 23:17 UTC | 0 min | resolved |

## Cite this

Customer.io posted 3 status incidents in September 2026 (0 major or critical); 0 price changes and 0 notable page changes observed.

- Canonical URL: https://rewindex.com/company/customer-io/2026/09
- Citation: Customer.io, “Customer.io in September 2026” (2026-09-01 00:00 UTC). Archived by Rewindex: https://rewindex.com/company/customer-io/2026/09 (CC BY 4.0).
- Markdown link: `[Customer.io: Customer.io in September 2026 (2026-09-01)](https://rewindex.com/company/customer-io/2026/09)`


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Canonical: https://rewindex.com/company/customer-io/2026/09 · Markdown: https://rewindex.com/company/customer-io/2026/09.md · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T11:08:24.966Z