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Logitech K380s vs K780: Choose Your Layout and Connection

Both keep three devices paired, so choose by layout first: K380s for a keypad-free keyboard, K780 for a number pad and cradle. Then check your computer connection: K380s uses Bluetooth or optional Bolt, while K780 includes a pre-paired Unifying receiver.

Published by Pickoryx · Published 2026-10-14

Source checked 2026-10-14 15:46 UTC

Products compared

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The buying question

Which layout and receiver package fit a three-device setup?

K380s omits the number pad and cradle; K780 keeps both and includes its USB receiver.

Quick verdict

Choose Logitech K780 if

  • You want a dedicated keypad or built-in cradle, accepting that these remain part of the keyboard.
  • You need a USB receiver supplied with the keyboard.
View Logitech K780 on AmazonPaid link
When to skip: Skip K380s if you need an integrated number pad. Skip either if you need four prepared device channels.
When the recommendation changes
  • A USB connection is required rather than Bluetooth.
  • You need a dedicated number pad or a place to prop up a device.

The differences that matter

Number Pad And Device Support

Logitech Pebble Keys 2 K380s

Compact layout with top-row numbers, no separate number pad or integrated cradle.[1, 5]

Logitech K780

Dedicated number pad and an integrated phone/tablet cradle.[2]

What this changes: Choose K380s if you prefer a keypad-free layout and already have a way to support your mobile devices. Choose K780 if you want a keypad or built-in device support; check your device and case fit.[1, 5, 2]

The better fit depends on your priorities

Usb Receiver Family And Setup

Logitech Pebble Keys 2 K380s

Bluetooth Low Energy, or a separately sold Logi Bolt receiver that you pair; Unifying is not supported.[1, 3]

Logitech K780

Bluetooth, or the included pre-paired Unifying receiver.[2, 4]

What this changes: For a USB-connected computer, K780 supplies its receiver; budget for Bolt and pairing if choosing K380s. An existing K780 receiver cannot be reused for K380s. If all your hosts use compatible Bluetooth, receiver inclusion need not decide the purchase.[1, 3, 2, 4]

The better fit depends on your priorities

Best for your routine

Three Bluetooth hosts, with no need for a separate number pad

Best fit: Logitech Pebble Keys 2 K380s

Based on listed features, not comparative testing.

K380s suits the keypad-free preference; provide your own device support.

View Logitech Pebble Keys 2 K380s on AmazonPaid link

A USB-connected computer alongside mobile devices

Best fit: Logitech K780

Based on listed features, not comparative testing.

K780 includes a pre-paired receiver. Choose it if you also accept its keypad-and-cradle layout; K380s remains an option with a separately arranged Bolt receiver.

View Logitech K780 on AmazonPaid link

Value and trade-offs

One or both observed offers have eligibility conditions, so no unrestricted price difference is shown.

Compare the complete setup cost: add a Bolt receiver only if K380s needs USB, and device support if you need it. Do not pay a premium merely for three-device switching; both provide it.

There is not enough price-history evidence here to recommend buying now or waiting.

Limitations

  • This comparison covers US K380s 920-011775 Tonal Graphite and K780 920-008025 Dark Grey/Speckled White, not the original K380 or a Pebble Combo.
  • Neither keyboard was tested hands-on. No typing-speed, comfort, noise, wireless-reliability or battery-endurance advantage is established.
  • Check current operating-system requirements and physical cradle fit. Bluetooth compatibility alone does not establish that a device and case fit the cradle.

Questions shoppers ask

Does a USB receiver add a fourth paired device?

No. Count the receiver-connected computer as one of the three destinations, then assign the remaining channels to your other devices.

What should I check when buying a used K780?

Confirm that its pre-paired receiver is actually included if you plan to use USB. The original guide places it under the battery door. A missing or replacement receiver changes the setup; Bluetooth is also available on compatible hosts.

Methodology and sources

Held three-device capacity constant, then compared physical layout and receiver purchase/setup requirements.

AI assisted source research and drafting.

View 5 sources
  1. 1.Pebble Keys 2 K380s: English US Tonal GraphiteLogitech · Official specifications · Source checked 2026-10-14 15:46 UTC
    Evidence used on this page
    • Product model 920-011775; device-hopping section; numeric keypad and receiver FAQs in page HTML: Three device channels; compact keypad-free layout; Bluetooth or separately sold Bolt; explicitly incompatible with Unifying.
  2. 2.K780 Multi-Device: English US Dark Grey/Speckled WhiteLogitech · Official specifications · Source checked 2026-10-14 15:46 UTC
    Evidence used on this page
    • Product model 920-008025; integrated cradle, multi-device flow and flexible connection sections: Number pad and device cradle; three switchable devices; Bluetooth or Unifying.
  3. 3.Getting Started: Pebble Keys 2 K380sLogitech · Official specifications · Source checked 2026-10-14 15:46 UTC
    Evidence used on this page
    • Pair a second device; optional Bolt setup; Compatibility; software notices: Three paired devices; optional Bolt requires purchase and pairing; receiver included only with Combo. Unifying Software is no longer maintained.
  4. 4.K780 Multi-Device Keyboard guideLogitech · Official specifications · Source checked 2026-10-14 15:46 UTC
    Evidence used on this page
    • Pages 3–4: Get Connected and Connect with Unifying: Included pre-paired Unifying receiver is stored under battery door; three devices total across Bluetooth and receiver connections. Historical software-installation instructions are not adopted.
  5. 5.K380s Tonal Graphite official top-view gallery imageLogitech · Official specifications · Source checked 2026-10-14 15:46 UTC
    Evidence used on this page
    • Full keyboard, especially right edge and top edge: Visual inspection confirms top number row, no separate numeric keypad, and no integrated device cradle.

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