July 21, 2026
On-Device vs. Cloud Dictation: What Actually Happens to Your Voice
"On-device" and "cloud" describe two different places the actual transcription work happens — and that one difference changes privacy, reliability, and cost all at once.
Quick answer
Cloud dictation records your voice, sends it to a server, and gets text back — every time, requiring a connection. On-device dictation runs the speech model locally, so your voice is converted to text on your own machine and nothing is transmitted anywhere.
Cloud dictation, step by step
- — You speak; the app records audio locally.
- — The audio is uploaded to the company's server over the internet.
- — The server runs a speech model and returns text.
- — The app displays the text it received back.
On-device dictation, step by step
- — You speak; the app records audio locally.
- — The same machine runs a downloaded speech model on that audio.
- — Text appears — no upload, no server round trip, no network required.
Why this is a privacy question, not just a technical one
Anything sent to a server exists, however briefly, on infrastructure outside your control — subject to that company's retention policy, security practices, and any future data use. On-device processing simply removes that step: there's no copy of your voice anywhere but your own machine, because it never had to leave.
The bottom line
Same input, same output — dictated speech becomes typed text. Where that conversion happens is the whole difference, and it's worth knowing which one you're using.