Highlight is Apache-2, which is for all intents and purposes equivalent to MIT if the work is not subject to patent. (this is my understanding, IANAL)

As other commenters mentioned, we are both comparable (pending your opinion on the MIT license).

We both charge a cloud saas fee as well:

https://www.hyperdx.io/pricing https://www.highlight.io/pricing

they both charge money and they're both some variant of open source.