Wispr Flow is cloud-only at every price tier — their own security FAQ says the backend must decrypt your audio to transcribe it. OpenWispr is an independent, unaffiliated, MIT-licensed alternative that does the whole job on your device, for free, with the source code public.
OpenWispr is an independent, open-source project, not affiliated with, endorsed by, or built by Wispr Flow — this page exists because "Wispr Flow alternative" is a real, common search, and the honest answer deserves sourced facts rather than a one-sided pitch. Wispr Flow is a well-funded, widely used cloud dictation product — it has real strengths, including iOS support and Windows support that OpenWispr doesn't have yet. The comparison below isn't "OpenWispr wins everything"; it's the specific, sourced facts, including where OpenWispr is still behind.
The core architectural difference is simple: Wispr Flow's own security documentation states that "Wispr's backend must decrypt audio to perform transcription" — there is no on-device mode at any tier, free or paid. OpenWispr has no backend at all; transcription and cleanup happen on the device in your hand, and the app is open source under MIT, so the claim is checkable rather than a promise.
None of the claims above are guesses. Wispr Flow's support docs state that if zero data retention is enabled, "audio is never saved to History and retry from saved audio is unavailable" — meaning the more private the setting, the less recoverable a failed transcription becomes. On iOS specifically, "failed dictations are kept for the current day only."
Their Context Awareness feature documentation lists what it sends to the cloud when enabled: "app info, textbox contents (before, selected, and after the cursor), on-screen text, variable and file names in coding apps, your user identifier within the app, the list of apps in your current session, a screenshot, and conversation history." This is on by default on Mac and Windows.
Their own changelog is worth reading directly: audio wasn't preserved for failed Android transcriptions until March 2026, and quitting mid-dictation on desktop destroyed the recording until June 2026 — a heavily funded product without write-ahead audio persistence for years. Their support team has publicly acknowledged the pressure: "we get around a thousand emails and tickets a day… but we only have 11 support team members right now."
It would be dishonest to present this as a one-sided win. Wispr Flow ships on iOS and Windows; OpenWispr today covers macOS and Android, with Windows and Linux marked "soon." Wispr Flow also has a mature retry/recovery flow for failed transcriptions once audio is retained — OpenWispr's equivalent (durable write-ahead audio, a proper retry button) is actively being built rather than shipped today.
If you need iOS or Windows dictation right now, or you specifically want retry-from-history on a failed transcription today, Wispr Flow currently covers that and OpenWispr doesn't yet. What OpenWispr offers instead is architectural: nothing to retain in the first place, because nothing leaves the device.
Open source and entirely on your device. Android from Google Play, macOS from GitHub — no account, no sign-up, just a download.