Make every video on the internet searchable
Ask any video or podcast a question and get answers with exact timestamps. Silestis turns YouTube, lectures, meetings, and podcasts into searchable, answerable knowledge — right in your browser.
[02:14] Today we'll cover gradient descent and why the learning rate matters more than you think.
[08:41] The key insight is that a learning rate too high causes divergence, while too low gets stuck in local minima.
[16:33] Let me show you Adam optimizer — it adapts the learning rate per parameter, which is why it works so well in practice.
[22:47] Now, backpropagation through the network...
From video to searchable knowledge
Three steps. Under two minutes.
Open any video in your browser
YouTube lecture, TikTok, Vimeo, university portal, podcast — the extension detects the stream automatically.
Click transcribe
Pick a model, hit go. Your transcript is ready in under 2 minutes — with timestamps, speaker labels, and translation.
Search, chat, study
Ask questions about the content. Generate flashcards for exams. Search across all your transcripts at once.
Not just transcription — understanding
Every tool you need to turn audio into actionable knowledge
A 1-hour recording, done in under 2 minutes
6 AI models optimized for different workflows — lectures, meetings, interviews, podcasts. Pick the right one, get results fast.
Ask questions, get answers
"What were the key takeaways?" — AI answers with clickable [mm:ss] timestamps. Like ChatGPT for your recordings.
Instant structure from any recording
AI generates structured notes, chapter marks, and key-point flashcards — from meetings, interviews, or lectures.
Find anything across all recordings
"What was decided about the Q4 budget?" — Semantic Search finds the exact moment across hundreds of transcripts. No more scrubbing through hours of audio.
Works in your language
100+ languages. Transcribe a German call, translate to English, or handle mixed-language recordings — all automatic.
Know who said what
Meeting mode detects each speaker. Rename "Speaker 1" to real names for clean meeting minutes.
Your format, your way
Export as TXT, PDF, DOCX, SRT, or VTT. Share via link, organize in folders, collaborate with your team.
Built for people who work with audio
Whether you're in a lecture hall, a newsroom, or a meeting room.
Students
Turn lecture recordings into searchable notes. Generate flashcards for exams. Never miss what the professor said.
Notes, chapters & flashcards
Researchers
Transcribe interviews, code qualitative data, search across hundreds of recordings for specific quotes.
Semantic search across recordings
Journalists
Transcribe press conferences and interviews on deadline. Export as text or SRT. Cite exact timestamps.
2 min per hour of audio
Teams
Document meetings with speaker labels. Share folders with colleagues. Search across all team recordings.
Speaker detection built in
Your audio never leaves the EU
Sensitive recordings deserve more than fine print. Here's what that means in practice.
EU-hosted
Processed on Cloudflare's EU edge and stored in the EU — built for GDPR from day one.
Deleted after transcription
Source audio is removed once your transcript is ready. We keep the result, not the recording.
Never trains AI
Your recordings and transcripts are never used to train models. Your content stays yours.
Encrypted & private
Encrypted in transit; transcripts are tied to your account and shared only when you choose.
Pay for what you use. Cancel anytime.
Start with 3 free transcriptions. Upgrade when you need more — no commitment.
Free
See if you like it
- 3 transcriptions
- Fast model only
- Videos up to 15 min
- TXT, SRT, VTT export
Go
For students & creators
- 2,000 credits / month
- Fast + Gemini long-form/translation
- Videos up to 2 hours
- AI Chat with transcript
- All export formats
Pro
For professionals
- 5,000 credits / month
- All 6 models (incl. Cohere best quality)
- Speaker diarization
- Semantic search
- Notes, Chapters & Flashcards
- Folder sharing
- Everything in Go
Max
For power users
- 20,000 credits / month
- Videos up to 10 hours
- Priority processing
- Priority support
- Everything in Pro
Questions? Answers.
How fast is the transcription?
Short recordings often finish within a minute. Longer files keep processing in the background, and URL pastes with existing captions can complete in seconds.
Do I need to install anything?
No. Silestis works entirely in your browser. The optional Silestis browser extension adds one-click transcription directly from YouTube, TikTok, and other video sites.
Is my data secure?
Yes. Files are processed on Cloudflare's edge network (EU), encrypted in transit, and stored in Cloudflare R2. Audio files are deleted after transcription. We never sell or share your data.
Which languages are supported?
Over 100 languages including English, German, French, Spanish, Chinese, Japanese, Korean, Arabic, and more. Translation between languages is built in.
What happens after my 3 free transcriptions?
Your transcripts, chats, notes, and flashcards stay forever — nothing gets deleted. To transcribe more, upgrade to Go (€8.99/mo), Pro (€19.99/mo) or Max (€44.99/mo). Annual plans save 3 months. Cancel anytime.
Can I transcribe YouTube videos and podcasts?
Yes — paste any YouTube, TikTok, Vimeo, Instagram, or SoundCloud link. We support 1800+ sites via yt-dlp. No need to download anything first.
See where Silestis fits your workflow
Compare it to the tools you know, or jump straight to your use case.
Compare Silestis
Every video you watch could be searchable.
Install the extension, hit transcribe, and never lose what was said in a lecture, meeting, or podcast again.
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