Turnitin had 22 outages in the last 2 years totaling 23h 24m of downtime — averaging 0.9 incidents per month.
There were 22 Turnitin outages since July 28, 2025 totaling 23h 24m of downtime. Each is summarised below — incident details, duration, and resolution information.
We’ve run into some issues. Feedback Studio, Feedback Studio UK, iThenticate v1, iThenticate v2 and Similarity have experienced an unexpected service incident. During this time, some users may have experienced an error message when logging in via Shibboleth SSO. We will update this post with a timeframe soon.
We’ve fixed it! Due to an unexpected service incident, users may have been unable to access their classes in Turnitin and Turnitin UK today. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Thursday, 11th June 16:10 - Thursday, 11th June 16:50 BST: Friday, 12th June 00:10 - Friday, 12th June 00:50 AEST: Friday, 12th June 09:10 - Friday, 12th June 09:50 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve fixed it! Due to an unexpected service incident, users who access Turnitin, Turnitin UK, Turnitin Similarity, SimCheck, Originality and iThenticate V1 and V2 through Shibboleth SSO only, may have been unable to do so today. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Tuesday, June 9th 21:06 - Wednesday, June 10th 01:42 BST: Wednesday, June 10th 05:06 DAY - Wednesday, June 10th 09:42 AEDT: Wednesday, June 10th 14:06 - Wednesday, June 10th 18:42 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin is currently experiencing an unexpected service incident. During this time, users may find that Turnitin, Turnitin UK and iThenticate V1 are inaccessible, integrations users may be affected. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We are continuing to work on a fix for this issue.
We're currently monitoring a fix for Turnitin and Turnitin UK, however, iThenticate V1 users are still affected.
We’ve fixed it! Due to an unexpected service incident, you may have been unable to access in Turnitin.com, TurnitinUK.com and iThenticate.com today, users accessing these services via integrations may have been affected. We are pleased to advise that service has been restored. The incident occurred between the following times: Turnitin.com and TurnitinUK.com: PDT: Wednesday, 3rd June, 17:00 - Wednesday, 3rd June 18:12 BST: Thursday, 4th June, 01:00 - Thursday, 4th June, 02:12 AEST: Thursday, 4th June, 10:00 - Thursday, 4th June, 11:12 iThenticate.com: PDT: Wednesday, 3rd June, 17:00 - Wednesday, 3rd June 18:38 BST: Thursday, 4th June, 01:00 - Thursday, 4th June, 02:38 AEST: Thursday, 4th June, 10:00 - Thursday, 4th June, 11:38 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin UK is currently experiencing an unexpected service incident. During this time, you may find that you are unable to access Classes or Assignments. Users accessing via an integration may also be affected. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, you may have been unable to access Turnitin UK classes and assignments today. Users accessing via an integration have also been affected. Administrators may have also experienced errors when accessing their portal. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Tuesday, 19th May 2026 04:50 - 06:20 BST: Tuesday, 19th May 2026 12:50 - 14:20 AEST: Tuesday, 19th May 2026 21:50 - 23:20 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin Feedback Studio is currently experiencing an unexpected service incident. During this time, Spanish language users may encounter intermittent errors when accessing AI writing reports. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, Spanish language users may have intermittently encountered errors when accessing the AI Writing reports in Turnitin Feedback Studio. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Thursday, 7th May 06:25 - Thursday, 7th May 09:08 BST: Thursday, 7th May 14:25 - Thursday, 7th May 17:08 AEST: Thursday, 7th May 23:25 - Friday, 8th May 02:08 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Due to an unplanned key rotation by Instructure following the security incident posted here (https://status.instructure.com/incidents/9wm4knj2r64z), users will encounter issues accessing reports via Canvas LMS submitted via Canvas Plagiarism Framework (CPF). Affected products: Turnitin Turnitin UK Turnitin Similarity, Originality and SimCheck
We’ve fixed it! Due to an unplanned key rotation by Instructure following the security incident posted here (https://status.instructure.com/incidents/9wm4knj2r64z), users might have been unable to access or generate similarity reports via Canvas LMS submitted via Canvas Plagiarism Framework (CPF). We are pleased to advise that service has been restored. Affected products: Turnitin Turnitin UK Turnitin Similarity, Originality and SimCheck The incident occurred between the following times: PDT: May 1st, 2026 - Friday, 15:30 to May 4th, 2026 - Monday 14:10 BST: May 1st, 2026 - Friday, 23:30 to May 4th, 2026 - Monday 22:10 AEST: May 2nd, 2026 - Saturday, 8:30 - May 5th, 2026 - Tuesday 7:10 Please note that Canvas will resubmit the affected submissions; it is worth noting that this may take a while to complete. We regret any inconvenience this may have caused if you were impacted by the incident.
We’ve run into some issues. Turnitin Clarity is currently experiencing an unexpected service incident. During this time, you may find that assignments are displayed as undefined and inaccessible. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We are continuing to work on a fix for this issue.
A fix has been implemented and we are monitoring the results.
We’ve fixed it! Due to an unexpected service incident, you may have been unable to access Turnitin Clarity assignments created using an LTI 1.3 integration via turnitinuk.com and turnitin.com directly today. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Thursday, 30th April 08:47- Thursday, 30th April 14:01 BST: Thursday, 30th April 16:47 - Thursday, 30th April 22:01 AEST: Friday, 1st May 01:47 - Friday, 1st May 07:01 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin, Turnitin UK, Similarity, SimCheck, Originality, Authorship, iThenticate V2, and Crossref Similarity Check are currently experiencing an unexpected service incident. During this time, you may experience a delay in the Similarity Report generation, as well as possible errors when attempting to log in to Turnitin Similarity, SimCheck, Originality, Authorship, iThenticate V2, and Crossref Similarity Check. Users accessing via an integration may have also been affected. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, you may have experienced a delay in the Similarity Report generation, as well as possible errors when attempting to log in to Turnitin, Turnitin UK, Similarity, SimCheck, Originality, Authorship, iThenticate V2, and Crossref Similarity Check today. Users accessing via an integration may have also been affected. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Tuesday, 31st March 20:00 - Tuesday, 31st March 22:11 BST: Wednesday, 1st April 04:00 - Wednesday, 1st April 06:11 AEDT: Wednesday, 1st April 14:00 - Wednesday, 1st April 16:11 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve fixed it! Due to an unexpected Service Incident, you may have been unable to load classic Similarity Reports in Turnitin, Turnitin UK and if accessing through an integration today. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Tuesday, 24th March 04:50 - Tuesday, 24th March 06:07 GMT: Tuesday, 24th March 11:50 - Tuesday, 24th March 13:07 AEDT: Tuesday, 24th March 22:50 - Wednesday, 25th March 00:07 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin, Turnitin UK, Feedback Studio and iThenticate V1 are currently experiencing an unexpected service incident. During this time, users may encounter an error message intermittently when accessing the Turnitin, Turnitin UK and iThenticate homepages. Users accessing via an integration may also be affected. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We are continuing to work on a fix for this issue.
iThenticate.com is now back to normal. We’re continuing to work on the intermittent errors shown in Turnitin, Turnitin UK and Feedback Studio. Users accessing these services via an integration continue to be affected.
We’ve fixed it! Due to an unexpected service incident, you may have encountered an error message when accessing the Turnitin, Turnitin UK and iThenticate homepages today. Users accessing via an integration may have also been affected. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Wednesday, 11th March 09:20 - Wednesday, 11th March 10:44 GMT: Wednesday, 11th March 16:20 - Wednesday, 11th March 17:44 AEDT: Thursday, 12th March 03:20 - Thursday, 12th March 04:44 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin, Turnitin UK, iThenticate V1, iThenticate V2 and Crossref Similarity Check are currently experiencing an unexpected service incident. During this time, users accessing the service via Shibboleth SSO may be unable to log in. Users accessing the service through other login methods are not affected. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, users of Turnitin, Turnitin UK, iThenticate V1, iThenticate V2 and Crossref Similarity Check might have experienced issues accessing the service when logging in via Shibboleth SSO today. We are pleased to advise that service has been restored. The incident occurred between the following times: PST: Tuesday, 3rd March 07:00 - Tuesday, 3rd March 09:48 GMT: Tuesday, 3rd March 15:00 - Tuesday, 3rd March 17:48 AEDT: Wednesday, 4th March 02:00 - Wednesday, 4th March 04:48 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin Feedback Studio is currently experiencing an unexpected service incident. During this time, you may find that users accessing the service via an integration encounter an error message. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, you may have found that users accessing the service via an integration encounter an error message in Feedback Studio today. We are pleased to advise that service has been restored. The incident occurred between the following times: PST: Tuesday, 27th 08:54 - Tuesday, 27th 10:19 GMT: Tuesday, 27th 16:54 - Tuesday, 27th 18:19 AEDT: Wednesday, 28th 03:54 - Wednesday, 28th 05:19 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin Clarity is currently experiencing an unexpected service incident. During this time, you may find that students may not be able to open the writing space. Users accessing this feature via integrations may also be affected. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, students may not have been able to open the writing space in Turnitin Clarity today. Users accessing this feature via integrations may also have been affected. We are pleased to advise that service has been restored. The incident occurred between the following times: PST: Wednesday, 14th 16:20 - Wednesday, 14th 19:00 GMT: Thursday, 15th 00:20 - Thursday, 15th 03:00 AEDT: Thursday, 15th 11:20 - Thursday, 15th 14:00 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Crossref Similarity Check V2, iThenticate V2, Turnitin Similarity, SimCheck, Originality and Authorship are currently experiencing an unexpected service incident. During this time, you may find that submissions are slow to generate Similarity reports. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, you may have experienced delayed report generation in Crossref Similarity Check V2, iThenticate V2, Turnitin Similarity, SimCheck, Originality and Authorship today. We are pleased to advise that service has been restored. The incident occurred between the following times: PST: Tuesday, 18th 00:53 - Tuesday, 18th 03:02 GMT: Tuesday, 18th 08:53 - Tuesday, 18th 11:02 AEDT: Tuesday, 18th 19:53 - Tuesday, 18th 22:02 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin Similarity, SimCheck, Originality, Authorship, iThenticate V2, Crossref Similarity Check in Europe are currently experiencing an unexpected service incident, users accessing these services via an integration may also be affected. During this time, you may find that users are unable to log in or access this service. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, users accessing the services via the following products: Turnitin Similarity, SimCheck, Originality, Authorship, iThenticate V2, Crossref Similarity Check in Europe may have experienced difficulties logging in to their account. Users accessing these services via an integration may also have been affected. We are pleased to advise that service has been restored. The incident occurred between the following times: PST: Thursday, 11 December 05:00–08:37 GMT: Thursday, 11 December 13:00–16:37 AEDT: Friday, 12 December 00:00–03:37 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin, Turnitin UK, iThenticate V2, Crossref Similarity Check, Similarity, SimCheck, Originality are currently experiencing an unexpected service incident. During this time you may find that uploads are slow and reports are stuck processing, integration users may also be affected. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We are continuing to investigate this issue.
We are continuing to investigate this issue.
We are continuing to investigate this issue.
We’ve fixed it! Due to an unexpected incident, you may have found that uploads were slow and reports were stuck processing, integration users may have also been affected in Turnitin, Turnitin UK, iThenticate V1 and V2, Crossref Similarity Check, Similarity, SimCheck and Originality today. We are pleased to advise that service has been restored. Incident Timeframe below: PST: Thursday 13th, 05:40 – Thursday 13th, 08:50 GMT: Thursday 13th, 13:40 – Thursday 13th, 16:50 AEDT: Friday 14th, 00:40 – Friday 14th, 03:50 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Due to an unexpected third party intermittent service degradation, users may encounter some issues accessing our services via an integration. A list of the services affected, when accessed via an integration, can be found below: Turnitin Turnitin UK Turnitin Clarity Gradescope (LTI Integrations and course roster page only) Asset Processor/Blackboard Ultra Assignment Canvas Plagiarism Framework Integrations through LTI 1.3 Turnitin Similarity, Originality, SimCheck and Authorship (LTI Integrations only) They have applied an initial fix, and are monitoring the results. You may experience some latency whilst trying to access the service. We regret any inconvenience this may cause. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We've fixed it. Due to an unexpected third party intermittent service degradation, users may have encountered some issues accessing our services via an integration. A list of the services affected, when accessed via an integration, can be found below: Turnitin Turnitin UK Turnitin Clarity Gradescope (LTI Integrations and course roster page only) Asset Processor/Blackboard Ultra Assignment Canvas Plagiarism Framework Integrations through LTI 1.3 Turnitin Similarity, Originality, SimCheck and Authorship (LTI Integrations only) We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Monday 20th, 00:11 - Monday 20th 03:00 BST: Monday 20th, 08:11 - Monday 20th, 11:00 AEDT: Monday 20th, 18:11 - Monday 20th, 21:00 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve fixed it! Due to an unexpected service incident, users of the following products: - Turnitin and Turnitin UK (via the website and integrations) - Similarity, Originality, SimCheck and Gradescope (via integrations only) Might have experienced difficulties accessing the service, accessing accounts, launching assignments, grade passback, and roster syncing. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: Tuesday 14th, 09:15 - Tuesday 14th, 10:15 BST: Tuesday 14th, 17:15 - Tuesday 14th, 18:15 AEDT: Wednesday 15th, 02:15 - Wednesday 15th, 03:15 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve fixed it! Due to an unexpected service incident, users of Turnitin Similarity, SimCheck, Originality, Authorship, Crossref Similarity Check and iThenticate V2 in the Americas (US environment), may have been unable to launch into the service. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: August 25, 13:25 - August 25, 14:55 BST: August 25, 21:25 - August 25, 22:55 AEST: August 26, 06:25 - August 26, 07:55 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin.com is currently experiencing an unexpected service incident. During this time, you may find that users are unable to sign in. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, you may have been unable to sign in at www.turnitin.com today. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: July 30, 22:15 – July 30, 23:25 BST: July 31, 06:15 – July 31, 07:25 AEST: July 31, 15:15 – July 31, 16:25 We regret any inconvenience this may have caused if you were impacted by today’s incident.
We’ve run into some issues. Turnitin.com is currently experiencing an unexpected service incident. During this time, you may find that users are unable to sign in. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
We’ve fixed it! Due to an unexpected service incident, you may have been unable to sign in at www.turnitin.com today. We are pleased to advise that service has been restored. The incident occurred between the following times: PDT: July 27, 23:55 – July 28, 01:32 BST: July 28, 07:55 – July 28, 09:32 AEST: July 28, 16:55 – July 28, 18:32 We regret any inconvenience this may have caused if you were impacted by today’s incident.