HL are one of the more expensive, though simply comparing trade tariffs is not always straightforward and transparent, as platforms can carry hidden costs such as small variation in the quote prices for shares, and in the case of international shares then different exchange conversion rates are involved. In fact, Robinhood had to pay a considerable fine for having agreements in place with 'preferred brokers', for which they got kickbacks.
Remember, also, not all platforms charge you an additional flat fee on your funds, as HL do.
That said, I'm okay with stumping up the costs for the interface and service. I now have an etoro account, which I opened up for cypto, and may re-open an IG account, for exposure to the Canadian market, which I miss.
It's actually £12 on HL as low-frequency trader, falling to £6, and which I think gets to the nub of the question here, do you see yourself as opening up long term positions, rather than more frequent trading. And how many shares and of what size stake (as obs, the higher the stake, the lower the transaction costs relatively).
So in short, if you see yourself as doing multiple stakes, with some frequency and with lowish stakes, then it would make sense to use a 'non-commission' platform.