The best online weight loss programs of 2025

Finding the right weight loss program may be difficult with so many options available in 2025. Whether you’re looking for a medically supervised plan, a lifestyle diet, or an app to guide you, this guide will help you choose the best online weight loss program. We have reviewed the top programs based on their pros and cons and feedback from users.

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Diet vs weight loss program

A weight loss program usually offers recommendations on how to monitor your weight loss progress, how often to exercise, and your diet, including which foods you should eat and which foods to avoid. Some weight loss programs offer peer support, personal coaching, and resources that help you foster healthy habits over the long term.

On the flip side, a diet is typically just about food and nutrition and doesn’t include any guidance around exercise. Some examples of diets include the Mediterranean diet, the plant-based diet, the low-carb diet, and the vegetarian diet.

Some people like the flexibility of a diet, but other people don’t like that diets don’t provide as much structure as weight loss programs do. Weight loss programs typically make it simpler to follow a diet by giving you extra support and resources to help you stay committed.

If you’re just starting your weight loss journey, weight loss programs are also an excellent fit for people who like having a clear set of regulations and rules. Not all weight loss programs are the right fit for everyone, so learn more about the best online weight loss programs to find the right one for you.

The best online weight loss programs reviewed

Looking for the best online weight loss program? Here are some of the top weight loss programs out there, as well as their benefits and drawbacks:

Klarity Health

Klarity Health offers licensed and board-certified healthcare providers who can evaluate you, based on your medical history, and determine which weight loss treatment is best for you. Weight-loss providers on Klarity offer personalized care for complex health needs, including mental health, diabetes, and chronic pain. Find a provider on Klarity Health in as little as 24 hours.*

Pros

• Providers can prescribe medication if it’s medically appropriate for you
• Some of the providers offer free consultations
• Same-day appointments are often available
• Affordable online visits with skilled providers
• Complex weight loss solutions 

Cons

• Some services might be unavailable in certain states
• In-person visits might be necessary for some medications

Reviews

• “I liked how you get to view providers to be matched with, and the appointment process was easy!”
• “I cannot express enough gratitude for the incredible care and guidance I’ve received.”
• “The doctor I saw was fantastic. Great bedside manner, knowledgeable, listened well, and provided efficient service.”

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Mayo Clinic Diet

The Mayo Clinic in Minnesota created an official diet and weight loss program called The Mayo Clinic Diet. The Mayo Clinic Diet focuses on your overall lifestyle and health in addition to your weight loss and diet.

Pros

• Flexible diet
• Not expensive
• Improves health

Cons

• Hard work
• No personal meetings
• No alcohol during the initial phase

Reviews

• “I really appreciate the approach of the diet that includes a wide variety of foods. It felt well-rounded and sustainable, which made it enjoyable overall.”
• “This program was able to help me lose weight faster and better than any program I have ever tried.”

WW (formerly called WeightWatchers)

Formerly called WeightWatchers, the WW program is a weight loss program focused on helping people eat healthier without sticking to a strict, unsustainable diet. Rather than counting calories, the WW program assigns points to various foods, depending on their nutritional value.

Pros

• Promotes exercise
• Helps you lose weight slowly and steadily
• Flexible and balanced

Cons

• Can be tedious
• Costs can add up
• Can lead to unhealthy dieting
• Must weigh in weekly

Reviews

• “This is the only diet that worked for me. I understood it from day 1. Very simple to use the app. Worked very quickly and basically showed me how to maintain myself within a few months. Worth every penny.”
• “I think WW should provide a trial period prior to having to purchase a lengthy subscription. I’ve used WW previously with some success, but the new program simply doesn’t work.”

Noom

Noom offers a Healthy Weight Program, which is a comprehensive wellness program with mental health, exercise, and diet components.

Pros

• Daily guidance and encouragement from coaches
• Studies show most people lose weight on this program
• Recommends recipes and kinds of foods to eat

Cons

• Coaches aren’t licensed nutritionists
• Some issues with canceling
• Still needs to grocery shop and cook meals

Reviews

• “Easiest way to control my weight! I love that it uses psychology and diet to help me understand my weight issues.”
• “Noom doesn’t help. Its platform is clunky, and it relies on multiple notifications a day, which become intrusive.”

PlateJoy

PlateJoy is a meal planning program that helps you eat healthier and save money by cooking healthy and fresh meals at home. 

Pros

• Provides tailored meal plans
• Adjusts menu and portion sizes based on your health goals
• Optimizes your grocery lists to decrease food waste

Cons

• Difficult to contact customer service
• Requires time and energy to prepare and cook meals
• Ingredients aren’t included in subscription

Reviews

• “I really like PlateJoy. It saves me a lot of money, and the meals are easy to make. I like that I can dump my grocery list into Instacart.”
• “So disappointed with the service. They invested a lot upfront to have a polished presentation, but the support and recipe offerings dropped in quality fast.”

Calibrate

Calibrate is a weight loss program that provides an online curriculum, GLP-1 medications, and biweekly online visits with a health coach.

Pros

• Promotes healthier choices over time
• Offers support and encouragement from a health coach
• Doesn’t encourage a restrictive or unsustainable diet

Cons

• GLP-1 medications can cause side effects
• Can potentially trigger mental health issues or disordered eating

Reviews

• “It’s been over a year since I started with Calibrate. The tools and coaching I’ve received have helped me be more self-aware and make better choices. I have been able to sustain weight loss for the entire time.”
• “I thought administering the shots was going to be dicey, but it wasn’t anything. I enjoy meeting with my coach every other week.”

Nutrisystem

Nutrisystem is a weight loss program that sends portion-controlled, low-calorie, and high-protein snacks and meals to your place every 2 to 4 weeks.

Pros

• Nutritious
• Effective for weight loss
• Convenient

Cons

• Still have to grocery shop and cook
• Expensive
• Too much processed food
• Not sustainable for some people

Reviews

• “I have been using Nutrisystem for almost a year, and I am very pleased with the food and the results. My food always arrives fast and tastes amazing.”
• “I have been using Nutrisystem for 3 months. The food is mostly okay. Some of it is really awful, and there are a few items that really taste good.”

Optavia

The Optavia diet offers low-carb, low-calorie, and pre-packaged meals that you can either eat prepared or cook for yourself. They also provide personalized coaching to help you lose weight. 

Pros

• Minimal food prep required
• Likely to cause short-term weight loss

Cons

• Very expensive
• Reduces calories to an unsustainable level
• Coaches aren’t trained health professionals
• Promotes dependence on highly processed foods

Reviews

• “Lost 109 lbs in 10 months. I’ve been overweight and struggling with my weight my whole life. I love Optavia.”
• “My friends and I tried the Optavia diet. Many of us developed eating disorders. The Optavia fuelings are so expensive and also very processed and unhealthy.”

The best online weight loss programs: comparison

Healthy weight loss: What to expect in a program

A weight loss program typically provides support and guidance to adopt lifestyle habits that encourage weight loss. The best online weight loss program includes:

• Support and guidance for building lifestyle habits and behavioral changes
• A plan to boost physical activity if needed
• A healthy diet plan that promotes sustainable weight loss
• A plan to maintain weight loss
• Individualized or personalized plans
• Medical supervision if applicable