A webhook is an HTTP callback-based real-time event notification mechanism that lets a service push data to a designated URL when an event occurs, a core technology for real-time data sync and workflow automation.
Plaky is a free project management tool by Pumble with unlimited users, projects, and boards on its free plan, supporting Kanban, List, Table, and Gantt views for budget-conscious small teams.
Strapi is an open-source headless CMS founded in Paris, France in 2015, leading its category with 65,000+ GitHub stars. Its visual content type builder auto-generates REST/GraphQL APIs with self-hosting and Strapi Cloud options.
Storyblok is a visual headless CMS founded in Linz, Austria in 2017, known for component-based content and in-page live editing, with a free Starter and Growth at $90.75/month billed annually.
Drupal is an open-source PHP CMS created by Dries Buytaert in 2000, the third most popular open-source CMS worldwide, with 40k+ modules on Drupal.org, native multilingual and headless support, suited to complex enterprise websites.
Contentful is a headless CMS platform founded in Berlin in 2013, valued at over $3 billion after its 2022 Series F round and serving brands such as Spotify and Audi. It delivers structured content to any channel including Web, App and IoT via REST/GraphQL APIs.
TriggerSmart is a triggered marketing automation platform headquartered in the United States, centered on event-driven and trigger-based automation, helping SMBs achieve precise outreach and automated operations through flexible trigger rules and an open technical architecture.
Clockodo is a German time tracking and attendance management tool. The free plan supports 3 users, data is hosted in Germany under GDPR, and it combines project timing, budget comparison, leave management and automated reports.
Payload CMS is an open-source headless CMS and application framework built on Next.js and TypeScript, code-first and self-hostable, used in production by Microsoft, ASICS, and Blue Origin, and part of Figma since 2026.
dotCMS is an open-source enterprise CMS founded in Miami, US in 2003, built on the Java stack with dual-mode traditional and headless architecture, REST/GraphQL dual APIs and multi-site management, listed as a representative vendor by Gartner.
Directus is an open-source headless CMS and backend-as-a-service platform founded in Los Angeles, US in 2014 that automatically wraps any SQL database into REST/GraphQL APIs, with 25k+ GitHub stars, ideal for data-driven projects.
Cockpit CMS is an open-source headless content management system released in 2015 under the MIT license, delivering JSON content through a REST API. It is lightweight, self-hostable and flexible for developer-driven, tech-stack-agnostic content backends.
Builder.io is a visual development and headless CMS platform founded in the United States in 2014. Drag-and-drop building generates React/Vue/Svelte component code with A/B testing and personalization, integrated via API into any frontend framework.
Agility CMS is a Canadian enterprise headless content management system trusted by enterprise teams since 2003, offering REST/GraphQL APIs, multi-site management, AI tool integration, and SOC 2 Type II certification.