Optavia

Optavia works differently from most services on this list: instead of ordering full meals for delivery, you buy a box of prepackaged fuelings, protein shakes, bars, and small snacks designed to be low in calories and higher in protein, and combine those with one meal a day that you cook yourself following the program’s “lean and green” format. A personal coach, usually someone who’s been through the program themselves, checks in regularly, which is closer to a support-group model than a typical subscription service.

That structure suits someone who wants built-in accountability and doesn’t mind a fair amount of the day’s food being shakes and bars rather than full cooked meals. The coaching network runs on a direct-sales model, so the experience can vary depending on which coach you’re paired with. It’s worth going in with clear eyes about the format, since it asks for more lifestyle commitment than simply ordering a box of dinners.