Prefect

prefect.io

Prefect declares 7 subprocessors in its subprocessor list, which we last checked on Nov 11, 2026 (evidence). They include Amazon Web Services, Google Cloud and OpenAI. No published changes since we first read it on Sep 23, 2026. 1 tracked vendor, Relay Network, names Prefect as a subprocessor.

Subprocessors CSV of Prefect's subprocessors · Atom feed of Prefect's subprocessors DORA draft CSV of Prefect's subprocessors as declared by Prefect what's this? · 

7 third parties.

NamePurposeLocationListed since
Amazon Web Services (AWS) Cloud provider hosting our managed execution environmentsUSA
Google Cloud Console Cloud provider hosting our secure servers and servicesUSA
Okta User AuthenticationUSA
OpenAI (Cloud 2 Only; Optional) AIError summaries of logs (optional)USA
Retool Admin console for creating and managing Prefect Cloud accountsUSA
Sendgrid Email notifications from the platformUSA
WorkOS (Cloud 2 Only) User AuthenticationUSA

Web TechnologiesCSV of Prefect's web technologies · Atom feed of Prefect's web technologies

Prefect's homepage made 182 requests to 22 domains, 9 services controlled by another company, and 2 domains not identified.

Analytics (4): HubSpot, LinkedIn, Meta, UnifyAdvertising (2): Google Cloud, OpenAIMarketing automation (1): GetVector, Inc.Cookie compliance (1): OsanoOther (1): Form builders: Default

9 third parties by category: Analytics 4Advertising 2Marketing automation 1Cookie compliance 1Other 1

Third parties 9 · 52 requests
GetVector, Inc. Vector 7% of the page's requests 13
Google Cloudsubprocessor DoubleClick Floodlight Google Analytics Google Tag Manager 5% of the page's requests 10
HubSpot HubSpot HubSpot Analytics 5% of the page's requests 9
Osano Osano 3% of the page's requests 6
OpenAIsubprocessor ChatGPT Ads Measurement Pixel 2% of the page's requests 4
Default Default (default.com) 2% of the page's requests 3
LinkedIn Linkedin Insight Tag 2% of the page's requests 3
Meta Facebook Pixel 2.9.439 2% of the page's requests 3
Unify Unify <1% of the page's requests 1
Unknown 2 · 3 requests

cr-relay.comusbrowserspeed.com

First party 1 · 127 requests
Prefect Framer Motion HSTS Lenis 1.3.26 Lucide Next.js 16.3.4 Next.js App Router Open Graph Priority Hints React Sentry Turbopack Vercel Webpack anime.js core-js 3.32.2 lit-html 2.8.0 70% of the page's requests 127

6 tracked companies loaded by the homepage are not in Prefect's subprocessor list. A website can use a service without it processing customer data.

Subprocessor of (1)CSV of the companies listing Prefect · Atom feed of the companies listing Prefect

1 company

Service statusCSV of Prefect's status page incidents · Atom feed of Prefect's status page incidents

Aug 15: no incident reportedAug 16: no incident reportedAug 17: no incident reportedAug 18: no incident reportedAug 19: no incident reportedAug 20: no incident reportedAug 21: no incident reportedAug 22: no incident reportedAug 23: no incident reportedAug 24: no incident reportedAug 25: no incident reportedAug 26: no incident reportedAug 27: no incident reportedAug 28: no incident reportedAug 29: no incident reportedAug 30: no incident reportedAug 31: no incident reportedSep 1: no incident reportedSep 2: no incident reportedSep 3: no incident reportedSep 4: no incident reportedSep 5: no incident reportedSep 6: no incident reportedSep 7: no incident reportedSep 8: no incident reportedSep 9: no incident reportedSep 10: no incident reportedSep 11: no incident reportedSep 12: no incident reportedSep 13: no incident reportedSep 14: no incident reportedSep 15: no incident reportedSep 16: no incident reportedSep 17: no incident reportedSep 18: no incident reportedSep 19: no incident reportedSep 20: no incident reportedSep 21: no incident reportedSep 22: 1 incident (1 no impact stated)Sep 23: no incident reportedSep 24: no incident reportedSep 25: no incident reportedSep 26: no incident reportedSep 27: no incident reportedSep 28: no incident reportedSep 29: no incident reportedSep 30: 1 incident (1 minor)Oct 1: 1 incident (1 no impact stated)Oct 2: no incident reportedOct 3: no incident reportedOct 4: no incident reportedOct 5: no incident reportedOct 6: no incident reportedOct 7: no incident reportedOct 8: no incident reportedOct 9: no incident reportedOct 10: no incident reportedOct 11: no incident reportedOct 12: no incident reportedOct 13: no incident reportedOct 14: no incident reportedOct 15: no incident reportedOct 16: 1 incident (1 minor)Oct 17: no incident reportedOct 18: no incident reportedOct 19: no incident reportedOct 20: no incident reportedOct 21: no incident reportedOct 22: no incident reportedOct 23: no incident reportedOct 24: no incident reportedOct 25: no incident reportedOct 26: no incident reportedOct 27: no incident reportedOct 28: no incident reportedOct 29: no incident reportedOct 30: no incident reportedOct 31: no incident reportedNov 1: no incident reportedNov 2: no incident reportedNov 3: no incident reportedNov 4: no incident reportedNov 5: no incident reportedNov 6: no incident reportedNov 7: no incident reportedNov 8: no incident reportedNov 9: no incident reportedNov 10: no incident reportedNov 11: no incident reportedNov 12: no incident reported

90 days agotoday

  • 4 incidents in 90 days
  • 0 major or critical
  • 1 h 20 min typical time to resolve
BeganIncidentImpactLasted
Flow Runs Crashing on Modal Push Work Poolsminor22 min
Elevated API Error Ratesno impact stated—
Elevated connection errorsminor1 h 20 min
Prefect Serverless service disruptionno impact stated—
Service disruption for outbound emailminor1 h 43 min
Service disruption for logs componentminor5 min
Elevated errors and degraded orchestration performancecritical26 min
Github incident is impacting Prefect Cloud managed execution and Prefect Horizon operationsminor40 min

Incidents per month

0 3 6 Jul 2026: 5 incidents (1 critical, 4 minor) · partial: our history begins Jul 16 · typical time to resolve 40 min Aug 2026: 0 incidents Sep 2026: 2 incidents (1 minor, 1 no impact stated) · typical time to resolve 1 h 20 min Oct 2026: 2 incidents (1 minor, 1 no impact stated) · typical time to resolve 22 min Nov 2026: 0 incidents Jul 2026Aug Sep Oct Nov

critical major minor no impact stated before or partly before our history

As Prefect's status page reports its own incidents (scheduled maintenance left out), read every few hours since (evidence)

Incidents reported by Prefect's subprocessorsCSV of incidents reported by vendors Prefect lists · Atom feed of incidents reported by vendors Prefect lists

226 reported incidents in the last 30 days, by 4 of the vendors Prefect lists as subprocessors.

A subprocessor list names a company, not the service an incident touched. This does not show that Prefect was involved.

DateCompanyIncidentImpactLasted
SendGridMMS Delivery Failures from Twilio to GCI United States minor3 min
SendGridSMS Delivery Failures from Twilio 10DLC to AT&T United States minor4 h 3 min
SendGridSMS Delivery Failures from Twilio to Orange Sierra Leone minorongoing
SendGridSMS Delivery Failures From Long Code Numbers to AT&T in the US minor1 h 19 min
SendGridSMS Delivery Delays from Twilio to MTS Kazakhstan minorongoing
SendGridSMS Delivery Failures from a Subset of Twilio Phone Numbers to Tcell Tajikistan minorongoing
OpenAIUnable to start new Workspace Agent runs criticalongoing
SendGridMMS Delivery Delays from a Subset of Twilio Long Codes to Multiple Small Networks in United States minorongoing
SendGridSMS Delivery Failures from a Subset of Twilio Phone Numbers to K-Cell Kazakhstan minor7 h 23 min
OpenAIElevated errors affecting logins, sign-ups, and ChatGPT features minor8 min
SendGridVoice Call Failures in JP1 minor3 h 51 min
SendGridSMS Delivery Failures from Twilio to Turkcell Turkey minor3 h 54 min
SendGridRetroactive Incident Impacting Twilio Usage APIs no impact stated1 min
SendGridIssue resolved minor1 h 43 min
SendGridSMS Delivery Receipt Delays from Twilio Phone Numbers to Movistar Venezuela minor3 h 26 min
SendGridGateway API (Lookup API) Failure Increase on Verizon in United States minor10 h 23 min
OpenAIIncorrect cost data in Costs API exports no impact stated2 h 20 min
OpenAIElevated Errors On API minor42 min
RetoolSome antivirus products are blocking retool.app majorongoing
SendGridWhatsApp Business API Message Send Failures minor16 h 29 min
OpenAIElevated ChatGPT Conversation Errors minor52 min
SendGridVoice Call Failures from a Subset of Twilio Phone Numbers to Chile minor19 h 20 min
SendGridVoice Call Audio Quality Degradation, Silent and One-Way Audio between Twilio and Multiple Networks in United Kingdom minor5 h 18 min
SendGridSMS Delivery Delays and Failures from a Subset of Twilio Alphanumeric Sender IDs and Long Codes to Multiple Networks in Italy minor3 h 14 min
SendGridSMS Delivery Delays and Failures from Twilio to Spusu United Kingdom minor3 h 26 min

And 201 more. All of them: CSV · Who is around them.

ChangesCSV of Prefect's changes · Atom feed of Prefect's changes

See the list as we read it on any date: Time machine

None since tracking began.

Rating badge for Prefect's site

Prefect transparency rating

It updates with the rating.

<a href="https://thirdpartyindex.com/vendors/prefect"><img src="https://thirdpartyindex.com/badge/prefect.svg" alt="Prefect transparency rating on Third Party Index" height="20"></a>
[![Prefect transparency rating on Third Party Index](https://thirdpartyindex.com/badge/prefect.svg)](https://thirdpartyindex.com/vendors/prefect)