James Fell (Former fitness writer, turned sweary historian) has recommended Balance 365 more than once.
Thought I'd mention it, because I've given it a look, and some consideration.
OTOH, it's not cheap, but I am, so ... .
My sister is currently doing Noom with success. She also does Flylady, and has for years, if that helps you understand her tolerance level for computer assisted helpfulness.
It isn't for me, because the whole thing sounds confusing and annoying, with weird restrictions and rules that my brain can't make sense of.
Weight Watchers isn't for me either, because I just don't jive with support groups or marketing schemes, and it seems to me that WW is both.
OTOH, I've known plenty of people who do get on with it quite well, and have for years. It's also true that I still hold a grudge against them because way back when they wouldn't let you join if you weren't heavy enough, which is counter productive on so many levels. I knew more than one person who could have used their help that was turned away. Ick. They've changed that policy, I think, which is a good thing.
On the free and therefore inherently cheap end of the spectrum, there's Pahla B's program. It sounds to me as though her basic idea is sound, but she talks too much for me, so I don't listen to her as often as I should. I do listen to episodes of her podcast from time to time, and have found it helpful.
The only 'program' that worked for me was portion control, meals not snacks. Plenty of fiber and protein, regular meals with fruits and veggies playing a major role. No snacking, and lots of water. That ultra control freak Bright Line Eating program got me started with it a good while ago, and I did lose weight and keep it off for a good long time. Guess I need to revisit my old notes, because whatever bits I cobbled together seemed to help me.
For me, it's basically true that nutritious meals are the only real key. Portion control helps keep me from overloading my plate.