We pay around 1500 per year for 8 cores (~10 tests on puppeteer). If your service offers not only test parallelization but also isolation of tests then that is

We pay around 1500 per year for 8 cores (~10 tests on puppeteer). If your service offers not only test parallelization but also isolation of tests then that is powerful. Charging per test runtime in seconds is also a good idea. As for pricing, look at Browserstack, browserless, Saucelabs. They are well established players.