First off, I need to acknowledge I'm using Sejda in 2021, while the other reviews from 2018 and early 2020. I'm sure there has been modifications since. As I have had a relatively positive experience using Sejda. So it's smart of the company to use the negative reviews to improve the product
I needed a program to quickly and easily edit, split/merge, and sign PDFs in a secure way without breaking bank. Found Sejda in Jan 2021 and started used the free web version (they remove documents off their server after a few hours). I'm looking to buy the desktop version with lifetime access for a flat fee, as the volume of editing PDFs is increasing (there is a limit of 3 edits per day).
It's pretty good price value compared to Adobe, and way more intuitive n easy to use (office worker, not a digital artist). And a lot more aesthetic and modern than a lot of other websites (which look sketchy)
They also have different prices depending on what you need - week, month, annual subscriptions or lifetime access to desktop version. And i imagine the cancellation is pretty easy and drama free. Received quick communication from customer service as well.
Pros - good for general editing, on par with Adobe, reasonable price, updating modern features via web subscription, good free version too, reasonably secure
Cons - free version limits to 3 edits per day, not as decked out with features as Adobe
Disclaimer - I should be getting paid for this review Ahaha but actually I just wanted to help anyone else out there who's on the fence about getting this product. Just try out the web version to see if it's good for you. And there's baby steps with the week and monthly trial before you commit an annual subscription. Do what makes sense and works for you.