Twilio is a good option, with a broad suite of communication APIs for SMS, WhatsApp, voice and email. It also offers a Customer Data Platform for personalizing customer journeys, the Verify API for user authentication and the Email API for sending transactional and marketing emails at large scale. Twilio's multichannel communication options and strong authentication abilities make it a good fit for businesses trying to simplify customer interactions and improve customer retention.
Kaleyra is another strong option that offers programmable voice, WhatsApp Business API and email validation. It offers a range of features including SMS, voice, chatbots and integration with popular helpdesk software and CRMs. With analytics and 99.99% API uptime, Kaleyra enables businesses to automate communication workflows and improve customer service, making it a good fit for many industries.
Webex CPaaS is a cloud-based communication platform that automates customer journeys across multiple channels, including WhatsApp Business. It has a low-code visual flow builder for quick deployment and integrates with existing systems. It's a good fit for businesses that want to improve customer experiences and simplify interactions, especially in industries where customer relationships are key.