On-device vs cloud dictation: what’s the difference?

How on-device dictation works

With on-device dictation, the speech recognition model lives on your computer. Your microphone records audio, the model on your Mac turns it into text, and the text appears where you’re typing. You download the model once, and after that the transcription itself doesn’t need an internet connection.

Open models made this practical for everyday apps. OpenAI’s Whisper, for example, is released with its code and weights so that anyone can run it locally; our explainer what is Whisper AI covers how it works. The trade-off is that your Mac does the work, and Whisper’s README lists larger models as needing more memory than smaller ones.

How cloud dictation works

With cloud dictation, your audio is uploaded to a provider’s servers, transcribed there, and sent back as text. That means your computer does less work, but dictation depends on your connection, and your recordings pass through, and may be stored on, someone else’s systems.

Wispr Flow is a well-known example. Its help center says an internet connection is required for transcription. Its data controls page describes a setting that stores dictation transcripts, audio, and history on Wispr’s servers, and another that allows dictation content to be used to improve its models; it says both default to on unless restricted, and that turning off model improvement does not stop cloud processing.

On-device vs cloud dictation at a glance

Privacy: the biggest difference

When speech recognition happens on your device, your audio doesn’t have to travel anywhere to become text. That matters most for things you’d rather not have stored on a server: medical notes, legal drafts, personal messages, or work under a confidentiality agreement.

Cloud services can still be careful with data, and many offer controls. The point is that you’re relying on those controls and on the provider’s policies, so read them. Look for whether audio is stored, for how long, whether it’s used to train models, and whether people may review it. Even Apple asks: when you turn on Dictation, its Dictation guide says you may be asked whether to share audio recordings, and that Apple may review a sample of stored audio if you agree.

On-device doesn’t automatically mean nothing leaves your computer. An app might still send analytics, offer optional cloud features, or check a license online. Check what’s on by default.

Offline use

On-device dictation keeps working on a plane, on patchy Wi-Fi, or anywhere you’d rather not connect. Cloud dictation stops when the connection does. If you dictate while traveling or in places with poor reception, this alone can decide it.

Speed and accuracy

There’s no universal winner. On-device speed depends on your Mac and the size of the model; cloud speed depends on your connection and the provider’s servers. Accuracy depends on the model, your microphone, your accent, and your vocabulary more than on where the processing happens.

The only reliable test is your own: dictate the kind of text you actually write, such as emails, notes, or technical terms, in each tool and compare the results.

Apple Dictation: it depends

Apple Dictation can work either way. Apple says you can check Keyboard settings to see whether voice input for general text Dictation, such as composing messages and notes but not dictating in a search box, is processed on your device and not sent to Siri servers. The answer depends on your language and Mac, so look at the text below the Dictation switch. Our guide speech to text on Mac covers the built-in options in more detail.

How to check where an app processes your voice

• Read the privacy policy and help center for statements about where audio is processed and stored.
• Look for an explicit offline mode or a statement that transcription happens on your device.
• Turn off Wi-Fi and try dictating. If transcription stops, it relies on the cloud.
• Open the app’s settings and check which cloud or data-sharing options are on by default.
• Check System Settings > Privacy & Security > Microphone to see which apps can use your mic.

Which should you choose?

• Choose on-device dictation if you dictate sensitive material, want to work offline, or simply prefer that your voice stays on your Mac.
• Choose cloud dictation if you need the same service across Windows and phones, or want features that only a provider’s servers offer, and you’re comfortable with its data policies.

To see which Mac dictation apps run on your Mac and which need the internet, with prices, read our guide to the best dictation app for Mac.

Where Morning fits

Morning is on-device dictation for Mac that lives in the notch. Voice capture and transcription run on your Mac with local Whisper models, and it works offline after you download a model; licensing needs occasional online validation. Optional cloud AI is off unless you enable it, and enabling it sends text to the provider you choose. For a side-by-side with a cloud service, see our Wispr Flow alternative comparison.