As of now, I find LambdaTest as the best cross browser testing cloud that perform Automated and Live Interactive Cross Browser Testing on 2000+ Real Browsers and Operating Systems Online.
With LambdaTest, you can perform Real-time Cross Browser compatibility testing of your website. You can choose from a wide range of updated Android and iOS mobile devices from latest to oldest versions of Chrome, Firefox, Safari, Edge, Internet Explorer, Opera, and Yandex. This live-interactive testing will help you deliver an error-free software, as you perform your test to check the intended functionality of features on your website as an end user in real-time. Design your test cases and feel free to run them through LambdaTest's Real Time Testing.
LambdaTest provides integration with various 3rd party applications such as Jira, Slack, Asana, Trello, GitHub, Paymo etc to help you collaborate with your teammates easily as you perform cross browser testing on our cloud-based platform. "Mark as Bug" button will help you to instantly push your edited screenshot to your integrated workspace.
Automated Screenshot testing will help you in capturing bulk screenshots through different desktops and mobile devices running on various OS in a single go! It is facilitated by instrumented UI test cases to help you realize how seamlessly your web app renders through different screen sizes using different browsers. At LambdaTest, you can capture up to 25 screenshots of different configurations of browsers and OS in a single session. You can choose from a wide range of latest to oldest browser versions of Chrome, Firefox, Safari, Edge, Internet Explorer & Opera. You also get to test on different operating systems Windows, MacOS, Android and iOS.
To get more about LambdaTest, have a look to this link.