With your own key
You pay the AI provider directly, and your sessions never touch our servers.
Your deviceAI provider
Kizuna AI: not involved
Your meeting content travels only between you and the AI you chose.
However you use Sokuji, voices, screen pictures, transcripts and translations go straight from your device to the AI provider you picked, never through Kizuna AI. The only difference is who settles the bill with that provider.
With a Kizuna AI account
We issue a short-lived key and bill by usage; your content still goes straight to the AI provider.
Your deviceAI provider
Your deviceKizuna AI
The dashed line carries only your account, balance and usage
On your own machine
When you use on-device models, they run on your computer and meeting content never leaves it.
Your deviceContent stays on this machine
Works offline once a model is downloaded; until then, Microsoft's online engines may be used automatically (see below)
The one exception: when you clone a voice with a Kizuna AI account, the voice sample you record passes through our server on its way to Soniox. We store no voice at all — the sample is discarded once it is handed over, and our server keeps only the voice ID Soniox returns.
Where each kind of data goes
This is the complete list. Meeting content not listed here never leaves your device.
The AI provider you chose
Does the recognition, translation and speech
- Your voice and the other side's
- Screen pictures (when screen context is on)
- Transcripts and translations
- Voice samples for voice cloning
Handled under each provider's own privacy terms. See the provider list
Kizuna AI
Only when you use a Kizuna AI account
- Your email and the name you entered at sign-up (any nickname is fine)
- Sign-in records (IP address, device, approximate location)
- Balance, top-ups and per-session usage, plus payment details from Stripe used to verify payments
- Feedback you choose to send
No pictures, transcripts or translations, and no voices except voice-clone samples passed on to Soniox (see above).
Stays with you
In every mode
- Session history and exported files
- Your settings and your own keys: the desktop app keeps them on your computer; the mobile app keeps its settings on your phone; the browser extension syncs them through your Google account when Chrome Sync is on
- All meeting content when you use only on-device models
Delete them in the app, clear the browser's data, remove the app's data folder, or uninstall the mobile app; exported files stay wherever you saved them.
Sokuji also makes a few connections that carry no meeting content: downloading on-device models, checking for updates, and sending usage statistics and error reports. Note that the engines marked “Online” in local inference (Edge TTS for speech, Bing Translator) do not run on your computer: they are used automatically when no on-device model is ready, or when you choose them, and the text to be spoken or translated is then sent to Microsoft.
Usage statistics · PostHog
We use PostHog (United States) for usage statistics and error reports — which provider you used, session length, errors, device and operating system, and in the browser extension the hostname of the page where you open it — to improve the product. Once you sign in, these are linked to your account ID, email and the name you entered. They never include meeting content. There is currently no switch in the app to turn them off.
Payments · Stripe
Top-ups are processed by Stripe, and your full card number goes only to Stripe — we never see it. To reconcile and verify payments, we receive some payment details back from Stripe, such as the payer's name, email and billing address, and the card brand and last four digits. If you request an invoice for a top-up, the details you enter for it — name, address and tax ID — are sent to Stripe together with your account email, and Stripe issues the invoice.
What we keep, and for how long
The data below is stored on our servers only if you use a Kizuna AI account.
DataWhy we need itHow long
Email and nameSigning in, verifying the account, granting trial creditWhile the account exists
Sign-in records (IP address, device, approximate location)Keeping you signed in, and looking into account problemsUntil the account is deleted
Anti-abuse IP recordsStopping the same person from claiming the trial credit twice90 days after last seen
Trial-credit records (a one-way hash of your email; if a claim was refused, the matching IP address)Stopping the same email address or person from claiming the trial credit againKept long-term, including after account deletion
Balance, top-ups and usage, plus payment details from Stripe used to verify paymentsBilling, verifying payments, and showing them to you on your account pageWhile the account exists; after deletion, as required by applicable local law
FeedbackReplying to youKept in our support mailbox
You can delete your account at any time from your account page. Deletion removes your email, name, sign-in records, linked sign-in methods and cloned voices; anti-abuse IP records are removed on the schedule above; trial-credit records are kept so the trial cannot be claimed again; billing records, including payment details from Stripe used to verify payments, are kept as required by law.
Don't just take our word for it
Sokuji is open source (AGPL-3.0). Anyone technical can check what this page says about where meeting content goes.
Read the code
Every place meeting content is sent is written in src/providers/, src/lib/edge-tts/ and src/lib/bing-translator/, and none of them is Kizuna AI (except voice-clone samples, described above).
Watch the traffic
Run a meeting with your browser's developer tools or a proxy open: every request carrying meeting content goes straight to the AI provider.
Go offline
With only on-device models, once they are downloaded, Sokuji keeps working with the network unplugged.
Our commitments
- We don't sell or rent your data, and we share it with no one beyond the services listed above and the infrastructure providers named in our Privacy Policy.
- We don't train models on your data or analyse your meetings — we never receive their content in the first place.
- Our account server is not open source, so this part you have to take on trust. If you'd rather not, Sokuji works fully without signing in: bring your own key, or run on your own machine.
This is the plain-language summary. The legally binding terms are in our formal Privacy Policy.
Privacy Policy