Rasa

Rasa is an open-source conversational AI framework that helps businesses build custom chatbots and virtual assistants. It provides natural language understanding (NLU), dialogue management, and integration tools that simplify the process of creating intelligent conversational systems. Designed for developers, enterprises, and research teams, the platform reduces the complexity of building scalable conversational AI without requiring proprietary vendor lock-in.

They offer intent classification, entity extraction, context-aware dialogue flows, and integrations with messaging platforms like Slack, Microsoft Teams, and WhatsApp, alongside features for multi-language support, custom pipelines, and on-premise or cloud deployment. Rasa also supports human-in-the-loop training, secure infrastructure, and enterprise-grade compliance. These capabilities help organizations deliver personalized customer support, automate workflows, and build domain-specific assistants.

And the best part? Rasa provides a free open-source edition with core conversational AI features, while paid enterprise plans (custom pricing) unlock advanced analytics, managed hosting, and dedicated engineering support. Businesses can choose a plan that best fits their conversational AI development and deployment requirements.