Sorry. I have a solution. And it's free. But it need a hard work. Go to Google maps. And search for specific niche let's say House cleaning service in new york. And start looking at all results and if they don't have a website call them and offer your service. You can invest also in automatic system like https://simpletexting.com and collect all results phone number and send bulk sms with your service link. I hope... Source: about 1 year ago

Better is to find a business texting solution. For example Avochato has Slack integration. A quick google for "Business Texting" finds a lot of options, like SimpleTexting, or TextUs. Or if you are just doing mass notifications, there are options for that specifically as well. Source: over 2 years ago

Again, see here, the introduction of a smartphone to the market started in 1994. IBM released their first smartphone, according to simpletexting.com, a devastating 77% of all adult Americans. The approximate population of American adults is 209,128,094 according to infoplease.com, and 77% of that is 161,068,232 adults that have a smartphone, imagine that, it is only the adults, teens around 13 to 17 has a 95% that... Source: over 2 years ago

Tsung: Developed in Erlang, Tsung is a multi-protocol distributed load testing tool. It can stress a variety of protocols, including HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP, and MQTT, among others. It is capable of simulating a large number of users per server, making it the ideal choice for high-load systems. Tsung also includes a comprehensive performance tracking dashboard and facilitates real-time... - Source: dev.to / 3 months ago

+1 for all the suggestions so far, I've also had good experience with tsung (http://tsung.erlang-projects.org/) and good ole apache bench aka ab. Source: about 3 years ago