Octopush - Octopush is a company providing technology-based communication solutions, including SMS, Web solutions, and Email APIs.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Clearstream - Clearstream is a SMS marketing and online texting software.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Maytapi - Serverless Whatsapp Api with Chat and Agent support.
n8n.io - Free and open fair-code licensed node based Workflow Automation Tool. Easily automate tasks across different services.