Early access · Live Translate
Two-way voice translation and captions for 1:1 calls, built so possible misunderstandings get flagged, costs stay predictable and quality is measurable. One flag on your call, 60 languages.
Early access: features, languages and pricing may change before general availability.
The problem
In healthcare, sales and support, the costly mistakes are rarely whole sentences. They're a wrong amount, a changed name or a misheard term that nobody notices until later.
Amounts and dates
“₹2,450” heard as “₹2,540”, or Tuesday heard as Thursday. Small slips like these lose money and trust.
Names and terms
Product names, medicines and legal terms get “translated” into ordinary words, or mangled.
Nobody can tell
With translation alone, neither person can see what the other actually said, so mistakes go unnoticed.
How it works
Set each person's language
Pass callerLanguage and receiverLanguage when you create the call, or let each person pick “I speak” in the call. Use auto to detect it.
Talk normally
Each person speaks in their own language, including code-mixed speech like Spanglish or Hinglish. PurpleCallio runs speech recognition, translation and voice on the server.
Each hears and reads the other
The listener hears a translated voice a short moment behind the speaker, with the original voice turned down, and both see DualView captions.
Seven features
All seven are part of early access and roll out to early-access accounts in stages.
01 · Understand
Original and translated captions, side by side
See what was said and what was heard, side by side.
Why it matters: If a translation looks wrong, either person can compare it with the original words straight away instead of trusting the AI blindly.
02 · Understand
Custom business vocabulary for translation
Your brand, people and industry terms, kept the way you define them.
Why it matters: Generic translation struggles with product names and specialist terms. A reusable glossary keeps them consistent, and MeaningGuard flags any that still come through changed.
"lexiconId": "lex_123",
"context": {
"industry": "healthcare",
"purpose": "post-surgery follow-up",
"roles": { "caller": "doctor", "receiver": "patient" }
}03 · Understand
Drop-in multilingual call components
A multilingual call screen without building the UI yourself.
Why it matters: Split views, language pickers, non-Latin scripts and right-to-left text are already handled, so you ship the feature instead of the plumbing.
04 · Trust
Misunderstanding detection and recovery
Catch a possible misunderstanding before it costs you.
Why it matters: It flags phrases that may be misunderstood, like a changed amount, date or name, so people can check, ask to repeat and move on.
"guard": {
"enabled": true,
"sensitivity": "standard",
"replay": false // replay of original audio is off by default
}05 · Trust
Multilingual transcript, summary and action items after every call
Every call ends with notes, in everyone's language.
Why it matters: Opt-in: get a synced transcript, a summary in each person's language and action items as one JSON payload, without building a recording pipeline.
"postCallReport": true
// after the call
GET /calls/:id/translation-report
→ { "status": "ready", "transcript": [...], "summary": {...},
"signals": {...}, "creditsCharged": 40 }06 · Control
Latency, quality and cost metrics for translation
Know when translation is slow, failing or expensive.
Why it matters: Knowing a call connected isn't enough. See translation delay, provider failures, flag rates and cost per minute by language pair.
GET /translation/metrics?from=2026-10-01&to=2026-10-31&pair=mr-en
{ "totals": { "calls": 412, "voiceMinutes": 3820, "captionsMinutes": 640, ... },
"latency": { "firstAudioMsP50": ..., "captionDelayMsP95": ... },
"guard": { "flags": 37, "byReason": { "term_mismatch:amount": 9 }, ... },
"byPair": [ { "pair": "mr-en", "route": "soniox", ... } ] }07 · Control
Usage budgets and cost limits for AI calls
Know what a translated call costs before you scale.
Why it matters: Per-call limits and project budgets are enforced on the server. When a limit is reached, translation steps down or pauses; the call itself keeps going.
"maxMinutes": 30, // per-call translation limit
"onLimit": "captions_then_off" // voice → captions → off; the call continues60 languages
Regional accents, code-mixed speech (Spanglish, Hinglish, Taglish and more) and everyday colloquial speech, not just formal text. Every language supports voice and captions, and any one can be translated into any other.
Powered by Soniox.
Afrikaans
Afrikaans
Shqip
Albanian
العربية
Arabic
Azərbaycanca
Azerbaijani
Euskara
Basque
Беларуская
Belarusian
বাংলা
Bengali
Bosanski
Bosnian
Български
Bulgarian
Català
Catalan
中文
Chinese
Hrvatski
Croatian
Čeština
Czech
Dansk
Danish
Nederlands
Dutch
English
English
Eesti
Estonian
Suomi
Finnish
Français
French
Galego
Galician
Deutsch
German
Ελληνικά
Greek
ગુજરાતી
Gujarati
עברית
Hebrew
हिन्दी
Hindi
Magyar
Hungarian
Bahasa Indonesia
Indonesian
Italiano
Italian
日本語
Japanese
ಕನ್ನಡ
Kannada
Қазақша
Kazakh
한국어
Korean
Latviešu
Latvian
Lietuvių
Lithuanian
Македонски
Macedonian
Bahasa Melayu
Malay
മലയാളം
Malayalam
मराठी
Marathi
Norsk
Norwegian
فارسی
Persian
Polski
Polish
Português
Portuguese
ਪੰਜਾਬੀ
Punjabi
Română
Romanian
Русский
Russian
Српски
Serbian
Slovenčina
Slovak
Slovenščina
Slovenian
Español
Spanish
Kiswahili
Swahili
Svenska
Swedish
Tagalog
Tagalog
தமிழ்
Tamil
తెలుగు
Telugu
ไทย
Thai
Türkçe
Turkish
Українська
Ukrainian
اردو
Urdu
Tiếng Việt
Vietnamese
Cymraeg
Welsh
Every language supports captions and voice, and any language can be translated into any other.
Use cases
A doctor in Pune and a patient who speaks Tamil talk directly. Medicine names stay intact, and a changed dose gets flagged.
A buyer and a seller, or a customer and a delivery partner, sort out an address or a price without a shared language.
A tutor teaches in English while the student hears Hindi, and both can check the original words when a concept is unclear.
An English-speaking agent helps a customer in Marathi. PurpleLex keeps plan and product names right, and the call ends with notes.
Compare
Most calling SDKs give you audio and video. Translation is usually left for you to assemble from separate providers. Here's what that means, next to what comes with Live Translate.
Capability
Building it yourself
With PurpleCallio
Voice and captions
Building it yourself: Wire speech recognition, translation and speech synthesis providers into your media pipeline.
With PurpleCallio: Built inTurn on one flag per call; voice and captions just work.
Original next to translation
Building it yourself: Sync two text streams and build the side-by-side view yourself.
With PurpleCallio: DualView TranslationTime-synced original and translated captions.
Company vocabulary
Building it yourself: Maintain prompt hacks or glossaries per provider.
With PurpleCallio: PurpleLexOne reusable glossary for brand names and industry terms.
Catching misunderstandings
Building it yourself: No signal when a number, date or name changes in translation.
With PurpleCallio: MeaningGuardFlags risky phrases with replay and ask-to-repeat.
Latency and quality
Building it yourself: Instrument every provider hop yourself.
With PurpleCallio: Translation ObservabilityDelay, failures and flag rates by language pair.
Cost control
Building it yourself: Several provider bills and no per-call limits.
With PurpleCallio: CostGuardBudgets and per-call limits enforced on the server.
Notes after the call
Building it yourself: Record, store and process audio in a separate pipeline.
With PurpleCallio: Post-Call SuiteTranscript, summary and action items in each language (opt-in).
Call screen
Building it yourself: Build pickers, split views and right-to-left layouts from scratch.
With PurpleCallio: Translation UI KitDrop-in components for React, Vue, Svelte and more.
Languages
Building it yourself: Coverage and pricing change with each provider you add.
With PurpleCallio: 60 languagesAny to any, with voice and captions in every language.
Pricing
Building it yourself: Per-provider bills on top of your calling platform.
With PurpleCallio: One simple ratePer minute, per person translating, from one credit balance.
Live Translate features are in early access.
One rate per minute for each person who has translation on (one side 1×, both sides 2×), in credits from your prepaid balance. Same-language calls aren't charged for translation. Rates are set by PurpleCallio and shown here and in your dashboard.
Developers
Hosted UI users get translation with no code. Otherwise, add a translation block to POST /calls, then use the SDK or the React components in the browser.
REST: create a translated call
curl -X POST https://purplecallio.com/api/calls \
-H "x-api-key: $PURPLECALLIO_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"callerId": "doc_1",
"receiverId": "pat_9",
"callerLanguage": "en",
"receiverLanguage": "mr",
"translation": {
"mode": "voice",
"lexiconId": "lex_123",
"context": {
"industry": "healthcare",
"purpose": "post-surgery follow-up",
"roles": { "caller": "doctor", "receiver": "patient" }
},
"postCallReport": true,
"maxMinutes": 30,
"guard": { "enabled": true, "sensitivity": "standard", "replay": false },
"onLimit": "captions_then_off"
}
}'Browser SDK
import { TranslationClient } from "@purplecallio/sdk";
// token = this participant's call session token (bj_session_…)
const translation = new TranslationClient({
serverUrl: "https://purplecallio.com/api",
token,
speak: "mr", // or "auto"
hear: "en",
mode: "voice", // "captions" | "voice"
originalVolume: 0, // other person's original voice while it's translated (0 = muted)
remoteAudio: remoteAudioElement,
});
await translation.enable();
translation.on("caption", (p) => render(p.phraseId, p.original, p.translated));
translation.on("flagged", (p) => markUncertain(p.phraseId, p.guard?.reasons));
translation.on("repeat.requested", ({ prompt }) => showPrompt(prompt));
translation.on("limit", ({ kind, message }) => showBanner(kind, message));
translation.requestRepeat(phraseId); // ask the speaker to say it again
translation.replay(phraseId); // only if the project enabled replay
translation.setMode("captions");React UI Kit
import {
DualViewCaptions,
LanguagePicker,
TranslationControls,
useTranslation,
} from "@purplecallio/react";
export function TranslatedCall({ token }: { token: string }) {
const translation = useTranslation({ token, speak: "en", hear: "en", mode: "voice" });
return (
<>
<LanguagePicker translation={translation} />
<TranslationControls translation={translation} />
<DualViewCaptions translation={translation} layout="both" />
</>
);
}There is a short delay of a second or more between someone speaking and the other person hearing the translation, depending on the language pair and route. We publish measured numbers at launch, and Translation Observability shows your own live numbers.
Translation is AI-generated and can be wrong, especially with names, numbers, accents and noisy audio. DualView shows the original words next to the translation, PurpleLex keeps your terms consistent, and MeaningGuard flags phrases that may be misunderstood. A phrase that isn't flagged can still be wrong, so important details should be confirmed.
60 languages across Europe, Asia, the Middle East and Africa, each with both captions and voice translation, from English, Spanish, French and Arabic to Hindi, Chinese, Japanese and Swahili. Speech in any of them can be translated into any other, and the speaker's language can be detected automatically.
Not by default. Audio is streamed to the translation providers and not stored by PurpleCallio. Replay of the original audio is off by default; if a project turns it on, recent audio is kept in memory only for about 30 seconds and cleared when the call ends. Transcripts are stored only if you opt in to the Post-Call Suite, with the retention period you choose.
CostGuard warns both people first. Then, depending on your settings, voice translation steps down to captions or translation pauses. The call itself never drops, and you get a translation.limit_reached webhook.
Yes. The original voice is turned down (ducked) rather than muted while the translation plays, so tone and emotion still come through. Each person can adjust the level.
It's in early access. Join the early-access list and we'll enable it for your account. Pricing, languages and features may change before general availability.
Early access
Join early access and we'll enable Live Translate for your account. Tell us your language pairs and use case, and we'll share measured results as they come in.