Email service providers for newsletters and marketing campaigns.

The content management system — where editorial creates, schedules, and publishes stories.

Real-time chat widgets — customer support, sales chatbots, or conversational engagement.

Live broadcast tooling for events, streams, and webcasts.

Print fulfillment, circulation, and subscriber-management systems for legacy publishing operations.

Multi-step automated journeys — drip campaigns, behavior-triggered messaging, lifecycle marketing.

Tools focused specifically on newsletter publishing — editing, scheduling, and audience growth for periodical-style email products.

End-to-end hosting, encoding, and delivery for editorial video.

Browser and mobile push notification delivery.

Hosted site-building platforms — often used for sub-brands or microsites alongside the main CMS.

Receipt, password-reset, and other one-to-one machine-triggered email delivery.

Front-end video playback components.

Functionality delivered as WordPress plugins — useful as a signal of WordPress-based publishers.