Question: Is there a service that provides a free API and integrations with popular messaging platforms to add AI capabilities to my chatbot?

If you're looking for a service that offers a free API and support for common chat apps to let you add AI smarts to your chatbot, Chatbase is a good choice. It's an AI chatbot platform that can be embedded directly in a website or accessed through an API. It supports integrations with services like Slack, WhatsApp and Zapier, and it's got strong security, auto-retraining, large AI models and support for multiple languages. The service has tiered pricing, including a free option so you can test it before paying.

Another good option is Botpress, a ChatGPT chatbot builder that supports more than 100 integrations, including WhatsApp and Telegram. It comes with a professional greeting, the ability to import knowledge from your own source, database synchronization for personalization and an API for customization. Botpress offers a free tier with 5 bots, 2,000 incoming messages and 100MB vector database storage, so it's good for small to medium-sized projects.

For a more general-purpose platform, take a look at ChatBotKit, which supports multiple languages and integrates with chat apps like Slack, Discord and WhatsApp. It's got a powerful API, Node SDK, Next SDK and mobile-first optimization. ChatBotKit is designed to be easy to use, with a template wizard to quickly deploy conversational AI chatbots. It's got four pricing tiers, including a free option, so it's good for a variety of use cases.

Last, LiveChatAI offers a free forever plan and integrates with services like Slack and WhatsApp. It uses your website and help center content to answer common questions immediately, helping to lower support volume and increase customer satisfaction. The service supports 95 languages and has human handoff and live chat with human support, so it's a good option for handling customer inquiries.