Brief service interruption due to network availability

Update timeline

1. monitoring Dec 19, 2025, 11:47 AM UTC

   A subset of Optimizely customers experienced a short service interruption due to a network availability issue reported by our third-party provider, Cloudflare. The issue has cleared, and we are not currently observing any site outages. Cloudflare is investigating intermittent network performance issues, and we are monitoring closely for any further impact.

2. identified Dec 19, 2025, 12:06 PM UTC

   While the earlier issue appeared resolved, we have since received additional alerts indicating intermittent availability issues for a subset of customers. Cloudflare continues to investigate network performance issues that may result in unexpected errors. We are actively monitoring and working to mitigate any customer impact. More updates to follow.

3. investigating Dec 19, 2025, 12:06 PM UTC

   Cloudflare continuing to investigate this issue and we are monitoring closely for any further impact.

4. identified Dec 19, 2025, 12:19 PM UTC

   While the earlier issue appeared resolved, we have since received additional alerts indicating intermittent availability issues for a subset of customers. Cloudflare continues to investigate network performance issues that may result in unexpected errors. We are actively monitoring and working to mitigate any customer impact. More updates to follow. Thank you for your patience!

5. monitoring Dec 19, 2025, 12:42 PM UTC

   Cloudflare implemented a fix and we are monitoring the results. Thank you for your patience!

6. monitoring Dec 19, 2025, 01:10 PM UTC

   Cloudflare have entered an extended observation period to ensure the integrity of the fix. Thank you for your patience!

7. monitoring Dec 19, 2025, 01:48 PM UTC

   Cloudflare continuing to monitor for any further issues. Thank you for your patience!

8. resolved Dec 19, 2025, 02:04 PM UTC

   Incident has been resolved by Cloudflare.