I often use BuiltWith to find out what technology, CMS, Scripts or Analytics a website has used. However it does not track what payment methods a website has used to implement its subscriptions based payments model. Are there any tools or service that I can use to find it out?
I've done some digging on this twice in the recent past to answer two different questions: 1) Who is using what CMS solutions (Hubspot, Pardot, etc.) and 2) Which restaurant brands are using which restaurant reservation services. I wasn't looking for the ones you are looking for, but I do have your answer.
Here's what I came up with.
Datanyze (US) is the leader here. They launched a couple of years ago to offer a very broad set of insights on the technology powering websites. They track everything from Advertising tech to Web Performance Monitoring. So that includes Analytics, CRM, Payments, Email Delivery, Hosting, you name it. You're looking at $250/month to dig into their data sets, however.
Wappalyzer (AUS) is another option that works as a Chrome plugin. It offers a similar lineup of technology providers. Their pricing is based on the number of records you want data on, and it works out to about $0.19 per record.
I haven't uncovered any services that provide the insights you've mentioned for free, but there is a Chrome plugin called SimilarTech that gives a little bit of it. And there are are paid alternatives to Wappalyzer and Datanyze as well.
Some great suggestions Brandon!
And it sounds like you're already using a lot of great insight tools. I'm not totally sure what you are looking for data wise, but what I've found to work in a lot of situations is simply using the Chrome Inspect tool. Essentially;
1. I right click over the object I'm interested in, and then click Inspect.
2. Dig around through the layers and look for anything insightful such as a domain name etc that tips me off to what's powering it (eg Infusionsoft, Mailchimp, plugin etc).
The other thing that might help is Firefox's inspect tool since it has 3D which helps you "see" into the code and find things more simply.
Hope that's helpful!