Both turn your voice into clean text on a Mac. The difference is what happens in AI apps, how the keys work, where your data lives, and what it costs. Checked against Wispr's site in September 2026.
What the Smart key types into Claude from the ramble above. Wispr Flow cleans up what you said; it doesn't restructure it into a prompt.
Both are hold-to-talk. You press a key, speak, let go, and finished text appears wherever your cursor is, in any app, with no plugins. Both remove ums and false starts, add punctuation, and handle names and accents far better than the dictation built into macOS. If you've used one, the other will feel familiar in the first minute.
This is the big one. Wispr Flow gives you a clean transcript of what you said, in every app. Speaky Box has a second key, Smart, that reads which app is in front. In Claude, ChatGPT or Cursor it turns your ramble into a structured prompt: the ask on one line, then context, constraints and the output you want. In Mail it writes an email. In Slack, a message.
If most of what you type goes into AI tools, this is the difference between a first answer you can use and two rounds of clarifying.
Wispr Flow uses one hold-to-talk key and decides formatting for you. Speaky Box gives you two keys you choose yourself: Dictate for your exact words, tidied, and Smart for app-aware writing. Either can be switched off. Some people want a literal transcript and nothing clever; they use Dictate and never touch Smart.
Wispr Flow wins outright. It runs on Mac, Windows, iPhone and Android, and its Notetaker records meetings on desktop. Speaky Box is Mac only. If you need dictation on your phone or a Windows laptop, stop here and pick Wispr.
Both send audio to a speech service to be transcribed. Speaky Box deletes the audio after transcription and keeps your history on your Mac, in a folder you can open and a setting you can switch off. Wispr Flow keeps history in your cloud account, which is what lets it sync across devices. Neither uses your words to train models under their business terms, but check the current policies before you rely on either for sensitive work.
Speaky Box: free for 2,000 words a week with both keys and every app, then £8.99 a month for unlimited. Wispr Flow: a free tier with weekly limits, then Pro at $12 a month billed yearly or $15 monthly, with Growth and Enterprise tiers above that for teams. Roughly, Speaky Box Pro is about half the price of Wispr Pro on a monthly basis, and Wispr gets you more platforms for the difference.
you need Windows or your phone, you want meeting notes in the same tool, or you're buying for a team. It's a mature, cross-platform product with a bigger company behind it.
you live on a Mac and most of your typing goes into Claude, ChatGPT or Cursor. The Smart key turns what you said into a prompt worth sending, your history stays on your machine, and Pro is roughly half the price.