The short answer: Cost Plus Drugs is cheaper in about one-third of cases, while GoodRx wins in two-thirds. But before you assume either service is your best bet, know this—a recent dermatology study found Cost Plus charges an average of just $17 per medication while GoodRx averages $31.21. Yet GoodRx still comes out ahead overall because it covers more medications and offers more pharmacy locations. The real answer depends on what you’re trying to fill. For a common antibiotic, you might save 50% at one service and 75% at the other.
There’s no universal winner here, and that’s exactly why you need to check both platforms for every prescription. The prescription drug market has been flooded with discount programs over the past few years, with Mark Cuban’s Cost Plus Drugs launching in 2022 as a disruptor claiming to undercut pharmacy chains and traditional discount programs. GoodRx, which has been around since 2011, continues to dominate with 23.5 million monthly active users and partnerships at over 70,000 U.S. pharmacies. Both promise significant savings, but they work in fundamentally different ways—and the way they work directly affects how much money you save and whether they’ll even accept your insurance.
Table of Contents
- How Do Cost Plus Drugs and GoodRx Pricing Models Actually Work?
- Which One Is Actually Cheaper for Common Prescriptions?
- How Do Operational Differences Affect Your Experience?
- How Much Will You Actually Save With Each Service?
- What Are the Real Limitations You Need to Know?
- How to Actually Compare Prices for Your Specific Medications
- The Future of Prescription Drug Pricing and Which Service Might Win
- Conclusion
How Do Cost Plus Drugs and GoodRx Pricing Models Actually Work?
Cost Plus Drugs operates on a straightforward formula that Mark Cuban has emphasized repeatedly: they charge the manufacturer’s cost plus a flat 15% markup, plus a $5 pharmacy service fee and $5.25 shipping fee. This means transparency is built into the pricing—you know exactly what you’re paying for, and the company isn’t relying on secret deals with pharmaceutical manufacturers. For someone buying a 90-day supply through the mail, this model can be remarkably cheap. The catch is that it only works for mail-order prescriptions, and Cost Plus maintains a smaller formulary (drug list) than traditional pharmacies. GoodRx works differently. Instead of negotiating directly with drug manufacturers, GoodRx aggregates coupon codes and negotiated rates from hundreds of pharmacy chains and independent pharmacies across the country.
When you search for a medication on GoodRx, you’re seeing real-time prices from actual pharmacies near you—Walgreens, CVS, Walmart, local independents, and others. You walk into the pharmacy with a coupon or code, and the price you paid online is the price you get at the counter. GoodRx doesn’t charge shipping because you’re picking up at a retail location, though they also offer mail-delivery options through partner pharmacies. For GoodRx Gold members ($11.99 per month for individuals or $19.99 per month for families), shipping is free on mail orders. The fundamental difference here matters more than most people realize. Cost Plus is a traditional mail-order pharmacy—efficient, simple, but limited to their inventory and mail delivery timelines. GoodRx is a price comparison and coupon platform that leverages existing pharmacy networks—flexible and comprehensive, but dependent on real-time negotiated rates that vary by location and pharmacy.
Which One Is Actually Cheaper for Common Prescriptions?
A 2025 study published in the Journal of the American Academy of Dermatology directly compared these two services by pricing out a sample of common dermatology medications. The results were striking: Cost Plus Drugs was cheaper in 32.7% of the cases examined, while GoodRx was cheaper in 67.3% of the cases. When excluding shipping costs, Cost Plus averaged $17 per medication, while GoodRx averaged $31.21—a significant difference. But when you account for the real-world scenario where someone is actually going to pay shipping on Cost Plus orders, the economics shift. Cost Plus’s 81% average savings compared to retail prices doesn’t fully translate when you factor in those delivery fees and wait times. Here’s a concrete example: say you need a three-month supply of a common acne medication. Cost Plus might charge $15 for the drug itself plus $10.25 in fees, totaling $25.25 for a 90-day supply.
That same medication through GoodRx at a local pharmacy might be $22 for a 30-day supply, which you’d refill three times over three months—a total of $66. In this case, Cost Plus wins. But flip the medication to a more common generic antibiotic, and GoodRx might show $8 per fill while Cost Plus is $12 plus fees—now GoodRx is the clear winner. This is why the study showed such split results. The variance by medication is massive, and “cheaper overall” depends entirely on which drugs you take. GoodRx’s 70-88% savings rate (with Gold members seeing the higher end) and its 23.5 million monthly active users suggest the platform resonates with most people, but that doesn’t mean it’s always the cheapest option. It means it’s convenient, accessible, and works for most people most of the time. Cost Plus might require patience for mail delivery, but it can beat GoodRx on specific medications where their pharmacy partnerships haven’t negotiated strong rates.
How Do Operational Differences Affect Your Experience?
Cost Plus Drugs operates mail-only, which means you order online, wait for delivery, and plan ahead for refills. They do offer 90-day supplies on many medications, which is valuable if you have a stable prescription you’re likely to take for months. Their smaller formulary—they don’t carry every medication—means some prescriptions simply can’t be filled through them. If you have a rare medication or a drug that’s newly approved, Cost Plus might not have it. There’s no rush delivery option, and their processing time is typically a few business days plus shipping. GoodRx, by contrast, integrates with existing pharmacy networks, so you can often fill prescriptions the same day. You have access to nearly any medication available at retail pharmacies because you’re shopping across the entire pharmacy ecosystem. You can compare prices across multiple pharmacies in your area—CVS might charge $45, while a local independent pharmacy charges $22 for the exact same drug.
This flexibility comes with a tradeoff: GoodRx’s prices are only as good as the negotiated rates that particular pharmacy has at that particular moment. Prices fluctuate. You might save 60% on a drug one week and see it jump to 40% savings the next week. Insurance also plays a role here that many people miss. If you have insurance, Cost Plus allows you to work with them as a standalone mail-order service, but you’d be paying out-of-pocket instead of using your insurance benefits. GoodRx explicitly states they work without insurance—you’re paying cash and getting whatever coupon price they’ve negotiated. This matters if your copay through insurance is $10 and GoodRx’s price is $25. Neither service is a solution if you actually want to use your insurance benefits efficiently.
How Much Will You Actually Save With Each Service?
The numbers are compelling but require context. GoodRx users saved an average of 83% off retail prices in 2024, with Gold members achieving 88% savings. Cost Plus Drugs customers saved an average of 81% off retail prices. Both are stunning discounts compared to walking into a pharmacy and paying full retail price without any coupon or discount code. Let’s translate that to dollars: if a medication’s retail price is $100, GoodRx might get you down to $17, while Cost Plus might get you to $19. Both are excellent, but GoodRx’s extra percentage point sometimes reflects their massive user base giving them leverage to negotiate better rates in certain categories. But savings percentages can be misleading. A 81% discount on a $12 drug means you’re paying $2.28.
A 70% discount on a $300 drug means you’re paying $90. Cost Plus’s transparent math actually helps here—you can calculate your exact cost before ordering. With Cost Plus at $12 plus 15% markup ($1.80) plus $5 pharmacy fee plus $5.25 shipping, you’re at $24.05 for that three-month supply of a cheap drug. GoodRx might quote you $8 per fill at your local pharmacy, which seems cheaper until you realize you’re filling it monthly instead of quarterly. For people with chronic conditions taking multiple medications, the savings compound. Someone on three daily medications might save $200-400 per month depending on their drug regimen and which service they use. That’s $2,400-4,800 per year in pure drug cost savings. Over a lifetime, the difference between finding the right discount service and paying retail prices on prescription drugs can easily exceed $50,000.
What Are the Real Limitations You Need to Know?
Cost Plus Drugs has a transparency advantage in pricing but significant limitations in scope. They don’t accept insurance, so if your insurance actually covers a medication well, Cost Plus can’t help you use that benefit. They mail-order only, which means no emergency refills on weekends or holidays. Their formulary is estimated at around 10,000 medications, which sounds large until you realize a comprehensive pharmacy might carry 40,000 or more drugs. Rare medications, newly approved drugs, and certain specialty medications simply won’t be available through Cost Plus. And if you’re allergic to a medication and need a switch urgently, mail delivery doesn’t work.
GoodRx’s primary limitation is consistency—prices fluctuate based on pharmacy negotiated rates, and you might see wild swings in costs week to week. Some medications show only modest discounts through GoodRx (sometimes 20-30% off retail), which is decent but not as dramatic as the 70-88% average they advertise. Availability can also be spotty; some pharmacies in rural areas don’t negotiate with GoodRx, leaving users in those regions with fewer options. GoodRx also requires you to be comfortable with pharmacy shopping and comparison—it works well for tech-savvy users but can be overwhelming for someone who just wants simplicity. A critical warning for both services: they do not work well with insurance, and using them instead of your insurance might actually be more expensive. If you have insurance with a low copay, paying cash through GoodRx or Cost Plus makes no financial sense, even if the cash price looks low. Run the math with your copay first before switching to either platform.
How to Actually Compare Prices for Your Specific Medications
The smart way to save money on prescriptions is to stop assuming one service is universally better and start comparing both for every medication you take. Start by checking your insurance copay. If your copay is $10 and GoodRx quotes $15, you’ve just saved yourself money by not switching. If your copay is $45 and GoodRx quotes $8, you have a clear winner. Once you rule out your insurance option (or confirm you don’t have insurance or choose not to use it), pull up both platforms. For Cost Plus Drugs, search your medication by name, dose, and quantity. Note the exact price, including the $5.25 shipping fee.
Their prices are fixed, so this number won’t change. For GoodRx, search the same medication and check prices at multiple pharmacies. If you’re willing to drive across town to save $10, that information matters. Most GoodRx prices are good for 30 days, so note the date to ensure you’re not looking at stale data. If you’re a candidate for GoodRx Gold ($11.99 per month), factor that membership fee into a comparison if you’re buying multiple medications or frequently using their mail-delivery service. A practical step: pick your three most frequently filled medications and price each one on both platforms for the quantities you normally buy (30-day, 90-day supply, etc.). Do this research once, and you’ll know which service typically saves you the most money. Then, when you get a new prescription or your doctor switches you to a different drug, you’ll already know the routine.
The Future of Prescription Drug Pricing and Which Service Might Win
The prescription drug market is shifting. Brand-name drug list prices grew only 3.5% in 2025, a historically low increase, though this statistic masks the complexity of rebates and net pricing that pharmacies and insurers negotiate. Overall prescription drug spending is projected to rise 9.0-11.0% in 2025, driven more by increased utilization and specialty drugs than by price inflation alone. This environment is actually favorable for discount services like Cost Plus and GoodRx because both rely on leverage in a market where manufacturers and pharmacies are under pressure to negotiate.
Cost Plus Drugs has gained significant media attention and user growth, but their mail-only model and smaller formulary will likely keep them as a specialist service—great if they have your medication, less useful if they don’t. GoodRx’s diversification (they launched telehealth services and expanded beyond prescription discounts) suggests they’re positioning themselves as a broader health platform, not just a coupon site. The real winner in the coming years may not be either of these services but rather consumers who use both strategically. As pricing pressures continue and more discount channels emerge, having multiple tools in your arsenal—insurance, GoodRx, Cost Plus, and potentially others—will remain the smartest strategy.
Conclusion
Neither GoodRx nor Cost Plus Drugs is universally cheaper, and that’s the most important takeaway. The 2025 research showing Cost Plus cheaper 32.7% of the time and GoodRx cheaper 67.3% of the time proves that the “right” choice is medication-specific, not platform-specific. Your best strategy is to compare both services for every prescription, starting with your insurance copay, and choose whichever option gives you the lowest out-of-pocket cost. For most people, GoodRx’s accessibility and broad pharmacy network makes it the go-to starting point, but Cost Plus Drugs is worth checking, especially if you take a stable set of chronic medications and don’t mind mail delivery.
The bigger picture is that discount prescription services have fundamentally changed the economics of medication access. Ten years ago, someone without insurance might pay $100-200 for a month of medication out of pocket. Today, that same medication could cost $15-30 through these platforms. The time you spend comparing prices—maybe 10 minutes per prescription—can save you hundreds or thousands of dollars per year. That’s a return on effort that beats most financial advice.
