AI Hay is a Vietnamese AI question answering app that pairs cited answers with a social knowledge community, covering homework help, image and PPT generation, and persona chatbots. A free tier hands out daily stars, while AI Hay Pro unlocks advanced models, Deep Research and 10MB file analysis.
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AI Hay is a Vietnamese AI assistant and AI question answering app built around one very simple habit: type a question, get a useful answer. The product name itself is a promise: the tagline Hỏi ngay đáp hay roughly means ask now, get a good answer, and the whole interface is built around a single question box. Behind that box sits a broader platform that mixes an AI chat assistant, a set of creation tools and a social knowledge community, all designed first and foremost for Vietnamese users. According to its Terms of Service, the service is developed and owned by AI Hay Joint Stock Company, and the same terms cover both the ai-hay.vn website and the AI Hay mobile apps.
What separates AI Hay from a generic chatbot is how it treats knowledge as something social. The platform describes itself in its own interface as a social network, and independent tech media characterise it as a knowledge-discovery product that merges generative AI with social networking. Answers draw on large language models, curated local content and a community of peers, so a single question can surface both an AI-generated explanation and human perspectives. Press coverage places its launch in May 2024 and reports more than 15 million downloads with over 100 million questions asked and answered each month, while the vendor's own announcement cites 10 million downloads in its first year — figures worth reading as company-reported rather than independently audited.
The engineering bet is deliberately local. The company states that it develops its own large language models trained on Vietnamese-language data rather than translating a foreign platform. That focus has attracted serious backing: in July 2025 the company announced a 10 million US dollar Series A round led by Argor Capital, with Square Peg, Northstar Ventures, AppWorks and Phoenix Holdings participating, bringing total funding to more than 18 million US dollars. For anyone comparing a Vietnamese AI assistant against global tools, AI Hay's pitch is straightforward: answers that understand local language, local curriculum and local context, at prices calibrated for the Vietnamese market.
AI Hay runs on the web and on both major mobile ecosystems. The web app at ai-hay.vn works in a normal browser with nothing to install, and the company has said explicitly that expanding the web experience is a priority for its Series A funds. On Google Play the app is listed as AI Hay – Smart Local AI in the Education category, with more than 10 million downloads and a 4.6-star rating from over 200,000 reviews. On the Vietnamese App Store the seller is listed as AI HAY JOINT STOCK COMPANY, the app requires iOS 15.5 or later, ships in English and Vietnamese, and holds a rating of about 4.7 stars from more than 120,000 users. One store-history footnote: the App Store record shows the listing originally went live in May 2021, before the current AI product took shape in 2024 — store metadata, not a statement about today's feature set. There is no desktop client; on laptops and PCs the browser version is the intended path.
Access is metered in stars (sao), a daily quota that each action draws from. The free tier grants 300 stars per day, while AI Hay Pro is priced at 69,000 VND per month or 599,000 VND per year and raises the allowance to 3,000 stars per day. According to the vendor's own comparison, the free plan covers roughly a dozen automatic questions a day, a couple of image or slide generations, and everyday helpers like translation and summarisation, while Pro multiplies those daily counts roughly tenfold. Pro accounts unlock file uploads of up to 10MB, faster responses and access to the most advanced models, plus much higher daily quotas for Pro Search and Deep Research. Payment runs through QR transfer on the web or in-app purchase on mobile, and promo codes from events or campus programmes can be redeemed during upgrade. Two honesty notes: the privacy policy still describes the app as entirely free, wording that predates the Pro tier, and all prices above come from the vendor's guide published in 2025 — check the official site for current terms before subscribing.
Yes — the core service is free. Every account receives a daily allowance of 300 stars that everyday question answering draws from, and you can even ask a few questions on the web before signing in. Heavier features consume stars faster, which is where the paid tier comes in.
AI Hay Pro is the subscription tier: 69,000 VND per month or 599,000 VND per year according to the vendor's guide. It raises the allowance to 3,000 stars per day, unlocks the most advanced models, enables Deep Research and 10MB file uploads, and multiplies daily quotas across tools. Prices can change, so confirm on the official site.
Stars are the platform's usage currency. Each action costs a set amount — a standard question costs relatively few, while generating a slide deck or an image costs much more. Free users get a daily refill; Pro users get ten times as much and can also earn bonus stars through activities.
Web at ai-hay.vn plus native apps for iOS (15.5 or later) and Android. The Android listing has passed 10 million downloads; there is no separate desktop application, so computer users rely on the browser version.
Yes — the store listings state that every response includes citations, and the search-oriented modes are built around retrieving current information with references. Treat the citations as a fast track to verification rather than a guarantee, especially for academic submissions.
The interface is available in Vietnamese and English, and the underlying models can handle English questions. That said, the product's entire value proposition is Vietnamese-language depth — local curriculum, local context, local content — so English-first users will usually be better served by global assistants.
The terms allow independent use from age 16, require parental consent for ages 14 to under 16, and the privacy policy states the service is not directed at children under 13. The iOS listing carries a 12+ rating. For younger students, parental supervision is the intended model.
The privacy policy lists the categories collected — device identifiers, contact details, ID documents used for verification, location with consent, interaction history — and names Firebase and Google Analytics as third-party analytics. Deletion, correction and access requests go to info@aihay.vn with a stated 30-day processing window.
Yes. The Chat Bot section includes user-created assistants alongside official personas, and the vendor publishes a guide for building your own bot with a custom name, avatar and persona. Public bots display how many chats they have handled.
ChatGPT is stronger for broad international knowledge, coding and plugin ecosystems. AI Hay is built specifically for Vietnamese users: its own models trained on Vietnamese data, cited answers tuned to local curriculum and news, a social layer for shared questions, and pricing in VND at a fraction of global subscription rates. Which is better depends on whether your questions live in Vietnamese or not.
