Voiceflow - Build voice apps in your browser without coding
Octopush - Octopush is a company providing technology-based communication solutions, including SMS, Web solutions, and Email APIs.
API to bot - Convert your API to Alexa skill or Google Home app in 5 mins
E-goi - Email Marketing companies, SMS Marketing, software email marketing.
Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda
Maytapi - Serverless Whatsapp Api with Chat and Agent support.