C

Circle

Circle provides a platform for digital businesses to build and manage communities, events, and courses under their own brand.

vendor	purpose	evidence
1 100MS USA	Audio and video infrastructure	“Provides live video support (WebRTC, HLS) for sessions, events, and interactive video features.” source
A Amazon Web Services USA	Cloud hosting	“Provides compute, storage, and infrastructure used to host Circle’s application and store customer data securely.” source
B Braintrust USA	AI evaluation	“Evaluates and monitors AI feature performance using sample inputs and outputs.” source
B Buildkite Pty Ltd. USA	CI / CD pipelines	“Runs CI/CD pipelines to build, test, and deploy Circle’s application.” source
C Clay USA	Data enrichment and GTM workflows	“Enriches contact and account data and supports go-to-market workflows.” source
C Cloudflare, Inc USA	Observability, monitoring, and security	“Provides CDN, performance optimisation, and security protection (including DDoS mitigation and traffic routing).” source
D dbt Cloud USA	Data transformation and analytics engineering	“Runs data transformation jobs on Circle’s analytics data.” source
F Fathom Analytics, Inc. (Fathom) USA	Call transcripts	“Records meetings and generates call transcripts, summaries, and action items.” source
F Forethought Technologies, Inc. USA	AI support automation	“Provides AI-powered support tools that process support tickets and help content.” source
G Google Cloud Platform USA	Cloud hosting	“Provides secure hosting services supporting part of Circle’s infrastructure.” source
H HubSpot, Inc. USA	CRM & marketing	“Processes customer admin and prospect contact information for onboarding, lifecycle communication, and marketing operations.” source
L Last9 Inc. USA	Observability and monitoring	“Provides observability for Circle’s infrastructure and applications (logs, metrics, traces).” source
L LiveKit USA	Audio and video infrastructure	“Provides live video support (WebRTC, HLS) for sessions, events, and interactive video features.” source
M Mailgun USA	Email delivery service	“Sends marketing emails on behalf of Circle customers to Circle members through Email Hub (e.g., notifications, verification emails).” source
N New Relic USA	Observability and monitoring	“Provides application and infrastructure monitoring (APM, logs, metrics).” source
O OpenAI USA	LLMs and other AI features	“Processes prompts and user-submitted content when AI-enabled features are activated within Circle.” source
R RevenueCat USA	Finance and payments	“Processes customer and member billing data, subscription events, related revenue analytics, and payment method tokens.” source
S SendGrid USA	Email delivery service	“Sends transactional and operational emails to Circle customers and members (e.g., notifications, verification emails).” source
S Stripe USA	Finance and payments	“Processes customer and member billing data, subscription payments, and payment method tokens.” source
Z Zapier USA	Workflows	“Processes workflow-triggered data to automate internal operations and integrations (AI orchestration).” source
Z Zendesk USA	Customer support	“Processes customer contact information and support ticket content to provide troubleshooting and support.” source

• 1

  100MS

  USA

  Audio and video infrastructure

  “Provides live video support (WebRTC, HLS) for sessions, events, and interactive video features.” source

• A

  Amazon Web Services

  USA

  Cloud hosting

  “Provides compute, storage, and infrastructure used to host Circle’s application and store customer data securely.” source

• B

  Braintrust

  USA

  AI evaluation

  “Evaluates and monitors AI feature performance using sample inputs and outputs.” source

• B

  Buildkite Pty Ltd.

  USA

  CI / CD pipelines

  “Runs CI/CD pipelines to build, test, and deploy Circle’s application.” source

• C

  Clay

  USA

  Data enrichment and GTM workflows

  “Enriches contact and account data and supports go-to-market workflows.” source

• C

  Cloudflare, Inc

  USA

  Observability, monitoring, and security

  “Provides CDN, performance optimisation, and security protection (including DDoS mitigation and traffic routing).” source

• D

  dbt Cloud

  USA

  Data transformation and analytics engineering

  “Runs data transformation jobs on Circle’s analytics data.” source

• F

  Fathom Analytics, Inc. (Fathom)

  USA

  Call transcripts

  “Records meetings and generates call transcripts, summaries, and action items.” source

• F

  Forethought Technologies, Inc.

  USA

  AI support automation

  “Provides AI-powered support tools that process support tickets and help content.” source

• G

  Google Cloud Platform

  USA

  Cloud hosting

  “Provides secure hosting services supporting part of Circle’s infrastructure.” source

• H

  HubSpot, Inc.

  USA

  CRM & marketing

  “Processes customer admin and prospect contact information for onboarding, lifecycle communication, and marketing operations.” source

• L

  Last9 Inc.

  USA

  Observability and monitoring

  “Provides observability for Circle’s infrastructure and applications (logs, metrics, traces).” source

• L

  LiveKit

  USA

  Audio and video infrastructure

  “Provides live video support (WebRTC, HLS) for sessions, events, and interactive video features.” source

• M

  Mailgun

  USA

  Email delivery service

  “Sends marketing emails on behalf of Circle customers to Circle members through Email Hub (e.g., notifications, verification emails).” source

• N

  New Relic

  USA

  Observability and monitoring

  “Provides application and infrastructure monitoring (APM, logs, metrics).” source

• O

  OpenAI

  USA

  LLMs and other AI features

  “Processes prompts and user-submitted content when AI-enabled features are activated within Circle.” source

• R

  RevenueCat

  USA

  Finance and payments

  “Processes customer and member billing data, subscription events, related revenue analytics, and payment method tokens.” source

• S

  SendGrid

  USA

  Email delivery service

  “Sends transactional and operational emails to Circle customers and members (e.g., notifications, verification emails).” source

• S

  Stripe

  USA

  Finance and payments

  “Processes customer and member billing data, subscription payments, and payment method tokens.” source

• Z

  Zapier

  USA

  Workflows

  “Processes workflow-triggered data to automate internal operations and integrations (AI orchestration).” source

• Z

  Zendesk

  USA

  Customer support

  “Processes customer contact information and support ticket content to provide troubleshooting and support.” source