Lumi / Compare video learning extensions
Video Learning Extensions Compared: Lumi vs Immersive Translate, Monica & Glarity
An objective comparison of public capabilities and product focus across Lumi, Immersive Translate, Monica, and Glarity. Where public official documentation does not specify an equivalent underlying mechanism, we mark it as unconfirmed rather than assuming absence.
Verified on 2026-10-21. "Unconfirmed" indicates that public official documentation does not specify an equivalent architectural mechanism — not that the product lacks user-facing support.
| Item | Lumi | Immersive Translate | Monica | Glarity |
|---|---|---|---|---|
| Primary product focus | Deep video learning & personal cross-video knowledge library | Web, document & multi-format bilingual translation | All-in-one AI assistant, writing & creative workflows | Video & web page summaries, translation & quick Q&A |
| Bilibili UGC / PGC captions & uncaptioned ASR | Supported (follows platform access & audio availability) | Officially offers bilingual captions & video translation (check official docs for platform specifics) | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs |
| YouTube smart resegmentation & playhead-first priority | Supported (context resegmentation + playback-first window) | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs |
| Bring your own Paraformer / Doubao ASR key | Supported (0 platform fee; billed by provider) | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs |
| Bring your own LLM API key (BYOK) | DeepSeek / OpenAI / Anthropic (0 Lumi Tokens) | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs | Officially supports OpenAI Key & external integrations |
| Cross-video Q&A with versioned snapshots & timestamp citations | Supported (private scope snapshots + clickable timestamps) | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs |
| Bilingual web page translation | Supported | Supported | Equivalent mechanism unconfirmed in public docs | Supported |
| Layout-preserving PDF / EPUB / comic translation | No dedicated document/comic workflow | Dedicated workflows officially provided for these formats | Equivalent mechanism unconfirmed in public docs | Equivalent mechanism unconfirmed in public docs |
Which tool fits?
- For layout-preserving PDFs with math formulas, EPUB e-books, or comic image translation, choose Immersive Translate's dedicated workflows.
- For email drafting, image generation, and an all-purpose sidebar chat assistant, consider Monica.
- For studying lectures on YouTube and Bilibili with refined bilingual subtitles, uncaptioned video ASR, and a searchable cross-video knowledge library, Lumi is purpose-built for this workflow. Glarity also offers strong video and page summaries — test both on your own study material.