
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
LightPDF records 1,742,568 monthly visits with -15.3% month-over-month growth and Freemium pricing. Zeli records 56,147 monthly visits with -46.8% growth and Free pricing.

Hacker News and AI paper summaries in seven languages
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | lightpdf.com | zeli.app |
| Pricing Model | Freemium | Free |
| Monthly Visits | 1.74M (1,742,568) | 56.15K (56,147) |
| MoM Traffic Delta | -314.58K (-15.3%) | -49.3K (-46.8%) |
| Primary Market & Share | 🇮🇳 India (24.9%) | 🇨🇳 China (65.1%) |
| Direct Visits / mo | 442.07K | 39.95K |
| User Rating | 4.2 | 4.3 |
| Supported Platforms | Website | Website |

Free AI-powered PDF editor, converter and reader for every device
Upload a PDF and ask questions in natural language, follow up on details and see which passages the answers came from. A separate chat mode works with YouTube videos.
Translate whole documents, including scanned and image-based PDFs, into 20+ languages while keeping the original formatting and layout intact.
Convert invoices, receipts, bank statements and purchase orders into structured, editable Excel files automatically.
Edit text and images, OCR scanned pages, convert to and from Office formats, then merge, split, compress, watermark, sign and annotate.

Hacker News and AI paper summaries in seven languages
Each story carries a short summary generated from the linked article plus a standout key quote, so you can judge relevance before clicking through.
The whole feed — titles, summaries and top comment highlights — is available in English, Chinese, Japanese, Korean, German, Spanish and Russian.
Every day gets a permanent page containing every story that hit the front page, retrievable long after the feed has moved on.
Daily AI papers are surfaced with translated titles and AI summaries, making Zeli a research reader as well as a news reader.

SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.

SpecialistEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
SpecialistEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
Offers a completely free PDF editing and AI assistant experience, but lacks some of LightPDF's cloud-native collaboration features.
Offers a robust desktop suite for OCR and editing, but requires software installation unlike cloud platforms.
Offers a robust desktop suite for OCR and editing, but requires software installation unlike cloud platforms.

Provides quick browser-based PDF editing and e-signatures, but has a less advanced conversational AI assistant.
Provides quick browser-based PDF editing and e-signatures, but has a less advanced conversational AI assistant.

Provides a more polished cross-platform desktop PDF editing suite, but requires a paid upgrade for full AI features.
Offers a streamlined conversational interface for querying PDFs, but provides fewer document editing and conversion utilities.

A proactive AI reading lens for papers, videos, and web pages
A proactive AI reading lens for papers, videos, and web pages
Free AI Summarizer for text, articles, URLs and images
Free AI Summarizer for text, articles, URLs and images
Excels at developer API integration and chatting with PDFs, but lacks comprehensive traditional PDF editing tools.
Features interactive PDF chat and form filling, but has fewer advanced desktop editing and conversion options.
Features interactive PDF chat and form filling, but has fewer advanced desktop editing and conversion options.