Top Foundations for King Memory Foam Mattresses: Our Expert Picks - Inn Mattress

As a seasoned editor at Innmattress, I’ve learned that picking the right base for your bed is just as crucial as choosing the perfect mattress. A top-notch foundation can totally elevate your sleep by offering the best support, steadiness, and durability for your mattress. But here’s the thing – not all foundations are the same, especially when we’re talking about memory foam mattresses.

In this piece, I’m excited to share our favorite picks for the best foundations for king memory foam mattresses. We’ve really done our homework, scouring the market to find options that tick all the boxes for stellar performance, solid construction, and happy customers. Whether you’re in the market for a fancy adjustable base or a classic box spring, we’ve got your back.

Let’s Talk Foundations

Before we jump into our top picks, let’s break down what you should look out for in a foundation:

  • Solid as a Rock: It’s gotta be strong enough to support your mattress without any sagging or buckling under pressure.
  • Perfect Match: Make sure the foundation’s size and weight limit fits your mattress like a glove.
  • Built to Last: You want something that’s going to stand the test of time, maintaining its shape and functionality.
  • Quiet as a Mouse: No one likes a squeaky bed, so if you or your partner move around a lot at night, a quiet foundation is a must.
  • Fancy Features (If That’s Your Thing): Love reading in bed or dealing with back pain? An adjustable base might just be your new best friend.

Our Top Picks for King Memory Foam Mattresses

Now, let’s dive into some of our handpicked favorites:

1) Amerisleep Adjustable Bed+

Amerisleep Adjustable Bed+
Amerisleep Adjustable Bed+

Here’s the scoop:

  • Type: Adjustable Bed
  • Price: $1,299 – $2,699
  • Sizes: Twin XL, Full, Queen, King, Cal King, Split King
  • Perks: Free Shipping, 10-Year Warranty
  • Pros: Customizable comfort, sleep-enhancing presets, relaxing massage modes, handy night light, wall-hugging feature
  • Cons: Installation fee, might be a stretch for some budgets, limited bundle deals for larger sizes
  • Bottom Line: This bed is a sleep revolution with its tailor-made comfort and high-tech features. Though the price and installation fee might be a bit steep for some, the benefits and long warranty make it a worthy investment.

Performance-wise, it’s a star player with rave reviews for comfort and adjustability. Plus, it comes in a range of sizes to fit any room and need.

2) Zinus Smartbase Elite Metal Platform Bed Frame

Zinus Smartbase Elite Metal Platform Bed Frame
Zinus Smartbase Elite Metal Platform Bed Frame

Why it rocks:

  • Pros: Super strong, easy to put together, lots of storage space, 5-year warranty
  • Cons: Fixed height options, the frame itself can be heavy
  • Bottom Line: If you’re after a sturdy, no-fuss foundation that keeps your mattress in prime condition, this is your guy. It’s built tough, easy to set up, and offers great under-bed storage.

The nitty-gritty:

  • Made from solid steel, supports up to 4400 lbs.
  • Tool-free assembly and generous under-bed clearance
  • Sizes from Twin to Cal King

3) Saatva Classic Mattress Foundation

Saatva Classic Mattress Foundation
Saatva Classic Mattress Foundation

The details:

  • Price: $215 – $430
  • Material: North American spruce, eco-friendly foams, organic cotton
  • Height Options: Multiple (varied)
  • Additional Features: Complements Saatva mattresses, optional frame, financing available
  • Pros: Superior support, environmentally conscious, long-lasting, top customer ratings, flexible payment options
  • Cons: Higher price range, limited height info
  • Bottom Line: A top-notch, green option that enhances your sleep. The price is a factor, but the benefits and financing options balance it out.

4) Avocado Organic Latex Foundation

Avocado Organic Latex Foundation
Avocado Organic Latex Foundation

Why it’s great:

  • Price: $349
  • Type: Solid Wood
  • Height Options: Standard and Low Profile
  • Pros: Durable, certified eco-friendly, simple assembly, 10-year warranty
  • Cons: Longer shipping time, premium price
  • Bottom Line: This foundation is all about sustainable, hassle-free living. It’s solid, certified green, and a breeze to set up.

More details:

  • Solid wood, organic cotton canvas exterior
  • GOTS, Greenguard, Climate Neutral Certified
  • Sizes from Twin to King


A solid foundation does wonders for your mattress, ensuring a restful sleep night after night. Our selections cover a range of needs – affordability, modern features, sustainability – so you’re sure to find something that fits the bill. Just remember our tips on compatibility and durability when making your choice. The right foundation can truly make or break your sleep experience.


What’s a foundation, and why do I need one for my memory foam mattress?

It’s the base that keeps your mattress supported. For memory foam mattresses, a solid foundation is key to prevent sagging and ensure even wear.

Can I use any foundation with my king memory foam mattress?

Not all foundations are cut out for king memory foam mattresses. Look for something strong and compatible with your mattress’s size and weight.

Can I stick with my old box spring for my new king memory foam mattress?

It depends. If your box spring is still in good shape, go for it. But if it’s seen better days, you’re better off with a new, supportive foundation.

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