If you are about to upload an interview, a client call, or a medical consultation to an AI transcription tool, a moment of hesitation is healthy. Your audio can contain names, financial details, health information, and trade secrets. The good news is that a well-built transcription service can handle sensitive recordings safely, and you can tell a trustworthy one apart by a short checklist: how data moves, how it is stored, what happens to it afterward, and whether your audio is ever used to train models.
Start with the connection. Anything you upload should travel over an encrypted channel so it cannot be read in transit. RealtimeVoiceKIT serves everything over TLS, so your files, transcripts, and API requests are encrypted on the wire. At rest, your data lives on Google Cloud infrastructure that encrypts stored data, which means a stolen disk is not a readable copy of your recordings.
Account security is the next layer, because the strongest encryption does not help if someone can log in as you. Passwords are never stored as plain text: we hash them with bcrypt. API keys are stored only as hashes, so even we cannot read your key back to you, and tokens for any connected cloud account you link are encrypted at the field level at rest. If you pay for a plan, card data is handled by Stripe, which is PCI-DSS Level 1, and your card number never touches our servers.
The question people care about most is what happens to their content after it is transcribed. We do not train models on your audio, video, or transcripts, and we do not sell personal information. Transcription runs through our speech-to-text processing provider as a sub-processor under a service contract, not as a free-for-all data feed, and the underlying engine is powered by leading frontier AI from OpenAI, ChatGPT, Anthropic, Claude, and Google, Gemini. Your recordings are your data, used to give you a transcript and the features you ask for, and nothing else.
Privacy controls should be in your hands, not buried. RealtimeVoiceKIT uses granular cookie consent and automatically honors Global Privacy Control, also known as GPC, so a browser-level opt-out is respected without extra steps. Analytics and error-monitoring tools only receive personal data after you grant analytics consent, so simply visiting the site does not hand your information to third parties. We support your data-protection rights under frameworks like GDPR and CCPA: you can export your data, and you can permanently delete your account or individual transcripts at any time, including their words, subtitles, and SRT or VTT files. Anonymous demo transcripts are deleted automatically after a short window, so trying the product never leaves a permanent trail.
No tool can promise that security is someone else's job alone, so a few habits on your side go a long way. Treat API keys like passwords and rotate them if one leaks, remove cloud-account connections you no longer use, and delete transcripts you do not need to keep. With encryption in transit and at rest, hashed credentials, payments isolated on Stripe, a no-training and no-selling policy, consent you control, and one-click export and deletion, AI transcription can be a secure way to turn sensitive audio into text. If you want to see how it feels before uploading anything real, start with the anonymous demo, which cleans up after itself.
The RealtimeVoiceKIT team writes about audio, AI, and the workflows that turn recordings into reach for the RealtimeVoiceKIT team.