| Amazon Web Services | Cloud infrastructure, compute, and data storage | United States | Cloud Infrastructure |
| Apple | Mobile app distribution (App Store), push notification delivery (APNs) | United States | Communication |
| Artifex Software, Inc. (DocRaptor) | HTML-to-PDF/Excel document generation | United States | Document Management |
| Azeus Systems | Care management platform (AzeusCare) | United Kingdom | |
| Braze | Push notification delivery, in-app messaging, customer engagement communications | United States | Customer Support |
| Chargebee Inc. / Chargebee Technologies Pvt | Subscription billing and revenue management | United States | Payments & Billing |
| ChurnZero | Customer success management and usage analytics | United States | Analytics & Monitoring |
| Cleverbridge GmbH / Cleverbridge | E-commerce and digital subscription management | Germany | Payments & Billing |
| Clickatell (Pty) | SMS notification delivery | South Africa | Communication |
| Cockroach Labs | Distributed SQL database hosting for identity and relationship data | United States | Cloud Infrastructure |
| Datadog | Application performance monitoring, infrastructure observability, log management | United States | Cloud Infrastructure |
| Google | Cloud infrastructure (GCP), storage and processing, data visualisation (Looker, Charts), push notifications (Firebase) | United States | Cloud Infrastructure |
| HubSpot | Customer relationship management, marketing automation, support ticketing | United States | Customer Support |
| Mailjet SAS (Sinch Group) | Transactional and notification email delivery | France | Communication |
| Microsoft | Cloud infrastructure (Azure), storage and processing, content classification | United States | Cloud Infrastructure |
| OVHcloud (OVH Groupe SAS) | Cloud infrastructure and data hosting | France | Cloud Infrastructure |
| PayPal, Inc. / PayPal (Europe) S.à r.l. et Cie, S.C.A | Payment processing (Braintree gateway) | United States | Payments & Billing |
| PDFcrowd s.r.o | HTML-to-PDF document conversion | Czech Republic | Document Management |
| PDFShift | SaaS HTML-to-PDF converter | France | Document Management |
| PostHog | In-app product usage analytics (aggregated user interaction data for feature improvement) | United States | Analytics & Monitoring |
| Redstor | Cloud backup and disaster recovery | United Kingdom | Cloud Infrastructure |
| rsync.net | Encrypted off-site backup storage | United States | Cloud Infrastructure |
| Segment.io, Inc. (subsidiary of Twilio Inc.) | Customer data platform — event routing and analytics integration | United States | Analytics & Monitoring |
| Stream.io B.V. / Stream.io | In-app messaging and activity feed infrastructure | Netherlands | Cloud Infrastructure |
| Stripe, Inc. / Stripe Payments Europe | Payment processing and subscription billing | United States | Payments & Billing |
| The Rocket Science Group LLC d/b/a Mailchimp (Intuit) | Transactional email delivery and email marketing communications if enabled | United States | Communication |
| Zendesk | Customer support ticketing, live chat, help centre management. | United States | Customer Support |