I completely get that — I went through the same confusion. What helped me was this comprehensive article:
https://www.wikihow.com/Fax-Online . It reviews and ranks 10 popular online fax platforms, with full breakdowns of what you get, what it costs, and who it’s ideal for. I liked that it included both free and premium options, and it pointed out which ones are best for occasional users vs. frequent business use. Based on that, I chose a low-cost service with a free tier — and it’s been perfect. Definitely check it out if you want to make a smart choice without trial-and-error.