If a complimentary product hosts their customers' websites on their servers (for example: Shopify), you can reverse lookup their shared IP to find many of their users.
First, find the URL of a website who for sure uses this complimentary product. Then enter it on an IP lookup search tool like IP Tracker to find out the IP address of the server they host this customer on.
Enter the IP address into a domain neighbors search tool like TCPIPUtils to get a list of other domain names hosted on the same IP. In the example below, you see a list of other websites that use Shopify as well.
Go to Twitter advanced search and type in either the @username of a competitor company or the @username of their dedicated support account in the field beside ‘Mentioning these accounts;. This will show you all of the people who tweeted at the company.
Go through it and add to a list everyone who voiced frustrations about some aspect of your competitor’s product or service. Open every tweeter's profile to get their full names and the company they work for if available. Then send them a cold email to explain how your product or service does it better. You can reference a proven template for this here.
What is a tool or platform that many of your prospects use on their websites? For this example, let’s say that your prospects are ecommerce store owners. In this case, some of them may use Shopify.
1. Go to one website you know that uses Shopify. Right click and click on 'View page source'.
2. Search for the tool name to find a common string of code it uses. In the case of Shopify, a common string of code is:
< link rel="shortcut icon" href="//cdn.shopify.com/s/files/1/0023/2122/t/10/assets/favicon.png?15334418719791660150" type="image/png" /> 3. Enter this common string of code into a code search engine like NerdyData and it’ll show you other websites that have it in their code: