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Cloud Nine
ErgoFSK
Ergonomic Split Mechanical KeyboardErgonomic Split
Mechanical Keyboard

A keyboard engineered to fit you...

  • PROFESSIONALS

  • CREATIVES

  • DEVELOPERS

  • GAMERS

The ErgoFSK is a full-size ergonomic keyboard designed to help you type naturally and AVOID WRIST STRAIN, RSI, & TYPING DISCOMFORT.

ALUMINUM

SMART WHEEL

DIAL IN YOUR CONTROL

VOLUME

Easily control volume / mute.

FULLY LOADED:

HOTKEYS
Dedicated CUT, COPY, PASTE, SELECT ALL hotkeys.
DEDICATED "M" KEYS
Use the "M" keys as hotkeys for custom functions.
MACROS
Program macros to boost productivity and efficiency.
DUAL LAYER
Unlock a secondary layer of functions on top of existing buttons.
10-KEY ROLLOVER
Up to 10 simultaneous keypresses with anti-ghosting.
GAMING MODE
Use the lockout function to deactivate the Windows® key at critical moments.

SWITCH OPTIONS

An amazing typing experiance awaits.

The ErgoFSK uses only premium Kailh® Box mechanical switches so every keystroke is a joy.

With three different typing feels to choose from, you're sure to find one that suits you...

30 Day Money Back Guarantee

Trial

45 Day Risk-Free

2 Year Warranty

Warranty

2-Year Warranty

Cloud Nine ErgoFSK
Ergonomic Split Mechanical Keyboard

  • 30 Day Money Back Guarantee Risk Free
    45-Day Trial
  • 2 Year Warranty 2-Year
    Warranty
  • Free US Shipping Free US
    Shipping
  • Free Returns Free
    Returns

Cloud Nine ErgoFSK
Ergonomic Split Mechanical Keyboard

CHOOSE A TYPING FEEL
Help me decide
$20.99 OFF
Pair with an accessory and save:
40% OFF CABLE BUNDLE
Separate your keyboard halves to the max (up to 20 in / 51 cm) Learn More
+$9.60 $15.99
Add a keyboard protection plan:
What's covered?
  • 30 Day Money Back Guarantee Risk Free
    45-Day Trial
  • 2 Year Warranty 2-Year
    Warranty
  • Free US Shipping Free US
    Shipping
  • Free Returns Free
    Returns

Why you'll love it:

Type in perfect comfort and speed with the Cloud Nine C989 ErgoFSK – an ergonomic keyboard that’s engineered to fit you. The split design and genuine Kailh® mechanical key switches make for a typing experience that’s both blissful and fun. You’ll blast through emails, code, or your favorite game with a smile on your face and total comfort under your hands. Check this C9 review article for more reference.

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Risk Free 45-Day Trial

Your 45-day trial begins the day your keyboard is delivered to your doorstep. If you decide it isn't a perfect fit for you within the first 45 days, we'll have it picked up and issue a full refund. (Awesome, right?)
We do ask all customers to spend up to 14 days on their new keyboard before starting a return or exchange so their hands have enough time to adjust to split-keyboard's unique feel + ergonomics!

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2-Year Warranty

If there's something wrong with your keyboard, we'll replace it for up to 2 years, starting from the date of original purchase.
This warranty is valid only if the purchaser uses the product for personal consumer use. The warranty no longer applies after any resale, whether new or used. Original, dated proof of purchase by the original purchaser, and official warranty document to make a warranty claim.

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Free Shipping & Returns

Get your keyboard shipped straight to you at no extra cost
*Continential US only.

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Free Returns

If you don’t love your keyboard, just contact one of our helpful customer service team to confirm eligibility and arrange a return. We'll issue you a full refund.
To be eligible for a return, you must be within the 45-day trial period and have had the keyboard for at least 14 days; the keyboard must also be clean and undamaged. You will be refunded the full keyboard price minus the value of any discount, interest accrued, and/or shipping charges.

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SWITCH OPTIONS:

KAILH® BOX
RED
Feel: Quiet linear feel with no click

A smooth and linear feel with very low audible click makes the RED switch perfect for speedy typing and quieter environments.

KAILH® BOX
BROWN
Feel: Light tactile feel with a subtle click

A balanced tactile feel and a medium audible click make the BROWN switch our customer’s most popular choice.

KAILH® BOX
WHITE
Feel: Noticeable tactile feel with a definitive click

A high tactile “bump” feel and substaintial audible “click” makes the WHITE switch perfect for those who want lots of typing feedback.

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+
Accident
Protection
An accident protection plan keeps your Cloud Nine keyboard covered from everyday mishaps and guarantees you a brand-new replacement.
Accident Protection
Prepaid Shipping
Brand New Replacement
In addition to our standard keyboard warranty, an accident protection plan includes coverage from:
Standard
Warranty
Accident
Protection
Malfunctions due to defects in materials and workmanship
Liquid / coffee spills
Falls and drops
Malfunctions from normal wear and tear
Failure from power surge
Number of claims
1
2
Refurbished replacement
After 30 Days
N/A
Brand-new replacement
First 30 Days
Full
Term
Prepaid 2-way shipping
Key benefits include:
  • Accidental damage protection
  • Brand-new replacement item if your keyboard malfunctions
  • Replacement arrives in 3-4 business days
  • Pre-paid 2-way shipping
  • No deductibles to worry about
  • Expedited processing
  • Easy online claims
Standard
Warranty
Accident
Protection
Malfunctions due to defects in materials and workmanship
Liquid / coffee spills
Falls and drops
Malfunctions from normal wear and tear
Failure from power surge
Number of claims
1
2
Refurbished replacement
After 30 Days
N/A
Brand-new replacement
First 30 Days
Full
Term
Prepaid 2-way shipping

Customer Reviews

Based on 218 reviews
67%
(146)
17%
(37)
6%
(12)
3%
(6)
8%
(17)
M
Michael
Love the keyboard (had it for years now) but hate the non-service

So, first I must say I love the keyboard. In fact, I own two of them as I have one in my home and one at the office. It is the full sized keyboard (back then they only had that one and I still would pick it)

I had two with the MX-Blue but one failed in the first year - they replaced it but could not get me MX-Blue but rather Brown. That was unfortunate but it is what it is.

Even worse, the software is really horrid. I had to replace the computer and now I can't update the keyboard as the software does not load the programming from the keyboard. Plus the newer software does not work since it is for a newer model where the keys are different. Lets not even talk about working with something other than Windows.

Calling or asking about this has been like trying to get something out of a black hole. I would actually consider a new keyboard at some point but they don't even offer the White (only Brown still) and I have no assurances that they will provide any on-going services.

The sad part is that the keyboard is wonderful and I would gladly continue supporting them if support was even partially useful.

I
Ivan Kalaushin
They took my money, don't respond and don't send the goods.

I created order #4876 on February 12, 2026, and paid for it immediately.
I received automatic reply emails, and the order Payment Status in my account is "Paid" and Fulfillment Status is "Unfulfilled". Today, February 23, 2026, I've already sent about 10 emails and messages, none of which have been responded to. I paid $300, and there's been no refund or shipment. Be careful with this company.

V
Vincent E Scheib
Missing negative tilt. Alt key position wrong.

Missing negative tilt. Alt key position wrong.

j
jjjohnsonusmc
Great Keyboard, Non-Existent Support

Start off with the Good. The keyboard is great and I have 2 of them, 1 Blue version and 1 Red version. I have had the keyboards for over 5+ years and for the most part I have not had any real issues till lately. The programable keys work randomly, and as you can see thereis an issue with my right space bar. Some times it doubles up and sometimes it doesnt workat all. I contacted Support repeatedly to find out if there is anyway to resolve this issue or if i need a new keyboard. No response.
Damn though, this thing is still running pretty well all in all, minus the spacebar. Ihope that support gets back to me soon, I have some other questions before I purchase another one from here. Customer support is a huge factor in if I purchase something again or not.

R
Roelf Diedericks
Order incomplete

I contact support, as instead of receicing two keyboards, I received only a single keyboard.

No one has assisted yet.