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slintel, builtwith

For a software like Sprinto, this may not be possible. There is no trace anywhere that they have used a software like yours to do this. The only places that this data is stored are: 1. Legal agency/team of your competitors 2. CRM & everyone who has access to it 3. Any SaaS management tools they use 4. Sales team/software they use 5. Finance team/software they use None of this is accessible publicly.

Yes agree @Ishaan Shakunt there is no tool to tell this data but there is a hack to figure out a finite number of companies that are using your competitor's product: Method 01: (If you have an ICP company database you can try this) You can run a script to figure out what log-in links or product backlinks they have as a backlink from their main domain or subdomain...in this way you can figure out if a company is someway related to a particular competitor company or not. (I tried this long back, will search and send the script if needed) My tool stack was UIpath, Gsheets, Python. Method 02: (If you just have the company names of your competitors) Use various backlink analyzing tools like semrush, ahref...etc and export the backlinks, referrer links of all your competitors now filter the subdomains and login-links. This will give you a list of companies in which you can choose the companies which fall under your ICP. (this is sort of a lengthy and manual process so we did this with the help of few interns)

@Keerthi, great point! This would also show up in tools like BuiltWith using a custom code line as Vishal siggested. In the case of Bhuvesh(Sprinto), I believe there aren't separate login pages either that are deployed on the website. The only place left is scraping their competitors' customer page or case study page.