Outages and root causes.
Two years of public outages, and what each company said caused them. Every entry links to the company's own write-up; nothing here is our speculation.
Status pages re-read just now
Incidents listed
By month, last two years · Slack
Peak 13 · June 2026
- Total: 29
- December 2024: 0
- January 2025: 0
- February 2025: 0
- March 2025: 0
- April 2025: 0
- May 2025: 0
- June 2025: 0
- July 2025: 0
- August 2025: 0
- September 2025: 0
- October 2025: 0
- November 2025: 0
- December 2025: 0
- January 2026: 0
- February 2026: 0
- March 2026: 0
- April 2026: 0
- May 2026: 4
- June 2026: 13
- July 2026: 3
- August 2026: 2
- September 2026: 2
- October 2026: 4
- November 2026: 1
- Incidents listed
- 29
- Last two years
- Official write-ups
- 0
- Linked from the incident
- Major outages
- 0
- As graded by each company
- Services
- 1
- With at least one entry
Notable outages, summarised
Read from each company's published analysis and summarised in our own words. Follow the link for the full account.
- Slack
Feb 26, 2025
Messaging, login and API outage
A large share of Slack users had trouble sending and receiving messages, loading channels, logging in and using workflows and API features for over nine hours.
Root cause, as stated by Slack
A maintenance action on a database system, combined with a latent defect in the caching system, overloaded the database with traffic.
Read the official analysis (opens in a new tab)Report an error (opens a correction request in a new tab)
From the status pages
Slack · Trouble Loading Slack and saving changes.
Partial outage · Nov 11, 2026 · Ongoing
Slack · Slack Real-Time Connection Disruption
Partial outage · Oct 22, 2026
Slack · Single Sign On errors
Partial outage · Oct 14, 2026 · 6 min
Slack · Slack for iOS closing unexpectedly when opening channels
Partial outage · Oct 9, 2026 · 3 d 1 h
Slack · Free Plan Customers Are Experiencing Message Failures
Partial outage · Oct 1, 2026 · 6 h 20 min
Slack · Some customers experiencing blurry image previews and download issues
Partial outage · Sep 12, 2026 · 8 h 56 min
Slack · Trouble loading Workspace-level Apps & Workflows settings page is returning blank pages
Partial outage · Sep 10, 2026 · 2 h 40 min
Slack · Trouble Accessing Historical Messages With Custom Data Retention Policies Enabled
Partial outage · Aug 13, 2026 · 32 d 1 h
Slack · Trouble Using Search Bar For Some Admins
Partial outage · Aug 6, 2026 · 2 h 46 min
Slack · Feature Degradation Affecting the Receipt of Emails in Slack
Partial outage · Jul 28, 2026 · 20 h 55 min
Slack · Issue sending messages to channels via certain Workflows
Partial outage · Jul 24, 2026 · 2 h 24 min
Slack · Receiving reminders in Slack issue
Partial outage · Jul 24, 2026 · 1 h 2 min
Slack · Chat functionality unavailable on Slack Help page
Partial outage · Jun 26, 2026 · 57 min
Slack · Trouble loading SSO configuration settings for some workspace admins
Partial outage · Jun 17, 2026 · 5 h 41 min
Slack · Trouble performing some actions
Partial outage · Jun 17, 2026 · 29 min
Slack · Trouble submitting workflow forms with file attachments on Android.
Partial outage · Jun 16, 2026 · 6 d 4 h
Slack · Slack Messaging issue
Partial outage · Jun 16, 2026
Slack · Child windows displaying content at half height
Partial outage · Jun 11, 2026 · 1 h 2 min
Slack · Trouble with Gmail add-on Integration
Partial outage · Jun 10, 2026 · 10 h 3 min
Slack · Trouble adding multiple users to channels
Partial outage · Jun 9, 2026 · 1 d 6 h
Slack · Some users unable to sign in
Partial outage · Jun 8, 2026 · 36 min
Slack · Administrators may experience errors in member management.
Partial outage · Jun 3, 2026 · 1 h 2 min
Slack · Trouble connecting or loading Slack
Partial outage · Jun 3, 2026 · 49 min
Slack · Connectivity Issues Affecting Some Users in Europe
Partial outage · Jun 2, 2026
Slack · Partial Degradation Impacting Usergroups
Partial outage · Jun 1, 2026 · 57 min
Slack · Trouble with Slack - General Slack functionality issues
Partial outage · May 27, 2026 · 16 h 21 min
Slack · Trouble uploading files and emojis in Slack
Partial outage · May 19, 2026 · 1 h 36 min
Slack · Huddle AI summaries not being generated
Partial outage · May 18, 2026
Slack · Issues affecting file uploads, message edits, channel renames, and channel creations
Partial outage · May 14, 2026 · 57 min
Who publishes root causes
Write-ups posted on status pages, last two years
Public information only
Everything on this page was already published by the companies themselves or by public bodies. statuswall gathers it in one place, links every item to its original, and adds nothing from private or leaked sources.
Sources
- Official status pages: incident titles, severity, times and the link to each published root-cause analysis, exactly as each company posted them
- Company engineering blogs and incident reports: the basis for the notable-outage summaries, each linked from its card
How fresh it is
- Incidents and RCA links: re-read from every status page about once an hour; last run just now
- Notable-outage summaries: written by hand and last checked against their sources on Nov 10, 2026
Titles, severity and times are as published on each company's status page. "Published RCA" means the company posted a postmortem on that incident's official page; we link to it and do not reproduce it. Many companies publish root causes on a blog instead, or not at all, so the absence of a link is not evidence that no analysis exists. Severity grading differs between companies and is not comparable across them. This is not a complete record of every outage.
statuswall is independent and is not affiliated with, sponsored by or endorsed by any company named here. Company and product names are used only to identify whose public information is being referred to. The information is provided as is, for general reference, with no guarantee that it is complete, current or free of error; it is not security, legal or purchasing advice. Where this page and an official source differ, the official source is right.