நண்பர்களே, இந்தக் கோட்டை பதினேழாம் நூற்றாண்டில் கட்டப்பட்டது.
Har bhasha mein tour.
The guide speaks any Indian language. Every tourist reads and hears it in their own language, seconds later. No app. No sign-up. Just scan and listen.
Guide · हिन्दी
दोस्तों, यह किला सत्रहवीं शताब्दी में बनाया गया था।
Friends, this fort was built in the 17th century.
বন্ধুরা, এই দুর্গটি সপ্তদশ শতাব্দীতে নির্মিত হয়েছিল।
मित्रांनो, हा किल्ला सतराव्या शतकात बांधला गेला.
Speech by Gnani AI Prisma & Timbre
Translation by Sarvam AI
Video by LiveKit
Three taps to a tour everyone understands
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1
Guide opens a room
Sign in with Google, name the tour, get a boarding pass with a QR code and a 6-letter code.
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2
Tourists scan and knock
Any phone camera works. They type a name, pick a language, and the guide taps Let in. Late joiners knock too.
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3
Just talk. Bas bolo.
Every sentence appears as a chat bubble in each person's language and is spoken aloud to them. Tourists can ask back.
Real numbers, measured, not promised
Every figure below comes from our own tests with real Gnani Prisma transcripts. The method and the raw results are public.
6/48 → 0/48
noisy sentences where speech-to-text returned nothing at all: raw mic vs our noise chain
47% → 32%
character errors with a crowd talking at the same loudness
~1.4 s
from the end of a sentence to the English subtitle (~2 s for other Indian languages; voice ~0.7 s later)
10 + 1
Indian languages plus English, with subtitles and a natural spoken voice
0.24 ms
of noise processing per 10 ms of audio, right on the phone
0 apps
to install. Up to 150 people per room, and the bus grows with the group
Noise figures: 8 sentences per condition, synthetic speech and noise, character error rate with 95% intervals. Speed: measured on a laptop over broadband; mobile networks add time. See the full benchmark and listen to the A/B →
Built for real tours, not demos
Reads and speaks
Subtitles for those who read, a natural voice for those who listen. Earphones in, phone in pocket.
Made for wind and crowds
A wind-adaptive filter and RNNoise clean every voice on the phone itself, before it is sent.
The guide is in charge
Approve who boards, mute or remove anyone, or switch to "only I talk" with one tap.
Tourists can ask back
Hold to talk, ask in your language. Send it to everyone, or only to the guide.
Virtual tours with video
Stream the guide's camera with subtitles in each viewer's language. Record the trip on your own phone.
Respectful by default
Listeners are addressed in the polite, gender-neutral form. "कसे आहात?", never "तू कशी आहेस?".
Live while you talk
Words appear as they are spoken; each finished sentence is translated while you keep going.
Nothing stored
No recordings, no transcripts on our servers. Processed live, then let go. Privacy →
Wherever a group shares a story
- Heritage walks Forts, palaces and old cities
- Temples & pilgrimages Groups from every state
- School & college trips One teacher, many mother tongues
- Museums Guided rounds without headsets to rent
- Site visits Factories, farms and campuses
- Family trips So grandparents hear it in their language
Questions
Do tourists need to install an app?
No. They scan the guide's QR code or type a 6-letter code in any phone browser, type a name and pick a language. No app and no account.
Which languages work?
Hindi, Marathi, Bengali, Tamil, Telugu, Kannada, Malayalam, Gujarati, Punjabi and English, as subtitles and as spoken voice. Hindi speakers can mix in English words (Hinglish). Mixing two Indian languages in one sentence is not supported yet.
How fast is it?
Live text appears while the guide is still talking. After a sentence ends, the translated subtitle arrives in about 1.4 s for English and about 2 s for other Indian languages; the voice follows about 0.7 s later. These are our measurements on a laptop; mobile networks can add a little.
Will it work outdoors?
Yes, that is what the noise chain is for. Our public benchmark shows where it helps (crowds, heavy traffic) and, honestly, where speech recognition was already strong (wind). A close mic or earphones with a mic help most of all.
Is my voice recorded or stored?
Bas Bolo doesn't store your audio, text or video. We process it live and let it go. To work, your speech is sent to our speech and translation partners (Gnani AI and our translation provider), who handle it under their own terms. Read the privacy policy.
Is it free?
Yes, free while in preview. Guides sign in with Google; tourists never need an account.
Your next tour, in every language.
Open a room in under a minute. Bas bolo.