SageTube is an AI tool that turns YouTube channels into searchable, citable Experts. You ask a question and SageTube answers using the original video transcripts, with every claim linked back to the exact video and timestamp.

How does SageTube work?

You add a YouTube channel or specific videos to an Expert. SageTube ingests the transcripts (or extracts audio if no captions exist) and indexes them in a private vector database. When you ask a question, SageTube retrieves the most relevant clips and an LLM composes the answer with citations.

Can SageTube summarize a YouTube video?

Yes. The Chrome extension adds a Summarize button to every YouTube video. SageTube produces a structured summary with key points, takeaways, and timestamped chapters.

Can SageTube answer questions about a whole YouTube channel?

Yes — that is the core use case. Add an entire channel to an Expert and ask questions across every video at once. Answers cite the specific video and timestamp where each fact came from.

How is SageTube different from NotebookLM?

NotebookLM is built for ad-hoc research notebooks. SageTube is built specifically for YouTube content: native channel sync, automatic Pulse digests when channels publish new videos, public shareable Experts you can monetize, and a Chrome extension that lives directly in YouTube.

Is SageTube safe to use with my YouTube data?

Yes. SageTube ingests only public YouTube content. Your private Experts, chats, and uploaded files are isolated to your account and stored on Google Cloud Platform with industry-standard encryption at rest and in transit. SageTube does not train AI models on user content.

How much does SageTube cost?

SageTube has four tiers. Starter is free with a $5 starting wallet balance. Builder is $9/month, Creator is $29/month, and Enterprise is $99/month. Paid plans get a monthly wallet allowance that pays for transcription, chat, and other usage. Wallet balance never expires.

What is the difference between Starter, Builder, Creator, and Enterprise?

Starter is free for trying SageTube (3 channels, 1 Expert). Builder ($9/mo) adds 5 channels and bigger uploads. Creator ($29/mo) unlocks Live Knowledge Pulse for 20 channels and creator monetization. Enterprise ($99/mo) removes the channel and Expert limits and adds API access.

Does SageTube work on mobile?

Yes. The SageTube Android app is a Pulse-first experience: digests when your channels publish new content, push notifications, and full Expert chat with citations. iOS support is on the roadmap.

Can creators monetize their Experts on SageTube?

Yes. Creators on the Creator and Enterprise tiers can charge visitors per query on their public Experts. Revenue split is 70% creator / 30% SageTube via Stripe Connect. Visitors buy query packs through Stripe Checkout.

What languages does SageTube support?

SageTube works with any video that has YouTube captions or extractable audio in a major language. Chat is currently best in English; multi-language support is on the roadmap.

Does SageTube use my videos to train AI models?

No. SageTube does not use your private content to train AI. The platform uses third-party LLM APIs (OpenAI, Gemini) under their data-protection terms; transcripts and chat content are not added to any training corpus.

Chat with YouTube channels

Ask questions across every video in the channels you follow. Every answer cites the exact video it came from.

Try it live on real engineering videos — no signup →

A real cited answer — click any citation to jump to the exact second on YouTube.

Meet the creators on SageTube

Real creators have turned their channels into public Experts. Ask their content a question — no signup needed.

Bill Hammack (engineerguy)

Free to ask

engineerguy — Ask the Videos

Ask how everyday things are engineered — answers come only from Bill Hammack's (engineerguy) videos, with citations linking to the exact video and timestamp.

Ask this Expert →

Browse all Experts

How It Works

Paste YouTube Link

We transcribe single videos or entire channels automatically.

Everything Gets Indexed

Your content becomes searchable. Add more videos over time to build up the knowledge base.

Ask Questions

Get answers that reference the exact video.

Answers With Sources

Every answer shows you where it came from. Click a source to open the original video or document.

What does Huberman say about cold exposure and dopamine?

Directly Supported

Based on 2 cited passages

Cold water exposure triggers a sustained rise in dopamine levels — up to 2.5x above baseline — that lasts for several hours. [1] He recommends 1–3 minutes at 40–60 °F, and notes that the dopamine increase is comparable to some pharmacological interventions. [2]

Sources

[1] The Science of Cold Exposure

[2] Dopamine & Motivation Toolkit

Ask Follow-Up Questions

Have a conversation with your content — like talking to someone who watched everything

Synthesized

Cross-referenced from 3 sources

Direct Evidence

• Recommends 11 minutes total per week spread across sessions [1]

• End on cold (no warm shower after) to retain the dopamine benefit [2]

Cross-Source Synthesis

• The dopamine data he cites matches findings from the 2000 Sramek et al. study on norepinephrine [1] [3]

"Deliberate cold exposure causes a prolonged release of dopamine... not a brief spike, but a sustained arc of elevated dopamine that can persist for hours."

Chunk #14 View in source ↗

Every Claim Is Traceable

Expand any citation to see the exact passage, then jump to the original source

New

Live Knowledge Pulse

Your Expert keeps itself up to date. Connect a YouTube channel and Pulse syncs new videos automatically — then tells you what it learned.

Always up to date

Set a sync schedule — daily, weekly, or monthly. New videos are picked up and indexed automatically. No manual imports.

AI digest notifications

After each sync, you get a summary of what your Expert learned. "3 new videos added — here's what changed."

Visitors can subscribe too

Share your Expert publicly and let visitors subscribe to Pulse updates. They get notified whenever your knowledge base grows.

Pricing

Start free. Pay only for what you use.

Pay-As-You-Go Rates

Usage is deducted from your wallet balance. You only pay for what you use.

YouTube videos with captions: $0.01 per minute
Transcription: $0.05 per minute (videos without captions)
PDF processing: $0.05 per page
Chat questions: $0.02 per question (Standard) / $0.10 per question (Advanced)

Starter

Try it free.

$0 / month

Up to ~8 hrs of video (~3 typical)

3 YouTube Channels
1 Expert
Data kept forever

Builder

For getting started.

$9 / month

Up to ~15 hrs of video/mo (~6 typical)

5 YouTube Channels
2 Experts
Top up anytime

POPULAR

Creator

For regular use.

$29 / month

Up to ~48 hrs of video/mo (~19 typical)

200 YouTube Channels
30 Experts
Live Knowledge Pulse
GPT-4 & Gemini Pro
Priority processing

Enterprise

For teams.

$99 / month

Up to ~200 hrs of video/mo (~66 typical)

Unlimited channels & Experts
20% off all usage
API access
Up to 5 team members
Dedicated support

All plans include AI chat. Usage beyond included hours is pay-as-you-go from your wallet. See full pricing details.

Coming soon

SageTube on Android

Your Experts in your pocket. Read your Knowledge Pulse, chat with citations, and get notified the moment your channels publish — all from a native Android app.

Pulse in your pocket

A live feed of what your Experts learned. Every channel sync, summarized and waiting when you open the app.

Chat anywhere

Ask your Experts on the move and tap straight through to the exact moment in the source video. Citations, deep links, the lot.

Push notifications

New videos indexed? You'll know. Pulse digests arrive as push notifications so you never miss an update.

Coming to Google Play

Get on the Android waitlist

Be the first to know when the SageTube Android app lands. We'll email you at launch — nothing else.

Stay in the Loop

Updates on knowledge preservation tools, new source types, and platform improvements. No spam.

Ready to Try It?

Frequently asked questions

: SageTube is an AI tool that turns YouTube channels into searchable, citable Experts. You ask a question and SageTube answers using the original video transcripts, with every claim linked back to the exact video and timestamp.
: You add a YouTube channel or specific videos to an Expert. SageTube ingests the transcripts (or extracts audio if no captions exist) and indexes them in a private vector database. When you ask a question, SageTube retrieves the most relevant clips and an LLM composes the answer with citations.
: Yes. The Chrome extension adds a Summarize button to every YouTube video. SageTube produces a structured summary with key points, takeaways, and timestamped chapters.
: Yes — that is the core use case. Add an entire channel to an Expert and ask questions across every video at once. Answers cite the specific video and timestamp where each fact came from.
: NotebookLM is built for ad-hoc research notebooks. SageTube is built specifically for YouTube content: native channel sync, automatic Pulse digests when channels publish new videos, public shareable Experts you can monetize, and a Chrome extension that lives directly in YouTube.
: Yes. SageTube ingests only public YouTube content. Your private Experts, chats, and uploaded files are isolated to your account and stored on Google Cloud Platform with industry-standard encryption at rest and in transit. SageTube does not train AI models on user content.
: SageTube has four tiers. Starter is free with a $5 starting wallet balance. Builder is $9/month, Creator is $29/month, and Enterprise is $99/month. Paid plans get a monthly wallet allowance that pays for transcription, chat, and other usage. Wallet balance never expires.
: Starter is free for trying SageTube (3 channels, 1 Expert). Builder ($9/mo) adds 5 channels and bigger uploads. Creator ($29/mo) unlocks Live Knowledge Pulse for 20 channels and creator monetization. Enterprise ($99/mo) removes the channel and Expert limits and adds API access.
: Yes. The SageTube Android app is a Pulse-first experience: digests when your channels publish new content, push notifications, and full Expert chat with citations. iOS support is on the roadmap.
: Yes. Creators on the Creator and Enterprise tiers can charge visitors per query on their public Experts. Revenue split is 70% creator / 30% SageTube via Stripe Connect. Visitors buy query packs through Stripe Checkout.
: SageTube works with any video that has YouTube captions or extractable audio in a major language. Chat is currently best in English; multi-language support is on the roadmap.
: No. SageTube does not use your private content to train AI. The platform uses third-party LLM APIs (OpenAI, Gemini) under their data-protection terms; transcripts and chat content are not added to any training corpus.