Streamlingo
Streamlingo delivers live AI speech translation for conferences, church services and university lectures. Listeners scan a QR code and follow in their own language, as audio or live text, across 80+ languages, with no app to install.
What is Streamlingo?
Streamlingo is a browser-based platform for real-time speech translation, built by Streamlingo GmbH in Karlsruhe, Germany. The setup is deliberately narrow. One person speaks into a microphone connected to a laptop, and everyone in the room follows on their own phone, in the language they choose. Nothing is installed on the audience side: attendees open a link or scan a QR code, pick from a list of more than 80 languages, and receive the translation as synthetic audio, as a live written transcript, or both.
The product comes in three commercial variants sharing one engine: events and conferences, church services and university lectures. Each adds a custom glossary, so technical vocabulary, biblical terms or subject names come through as intended rather than being guessed. The original audio can be broadcast alongside the translations, and human interpreters can be routed through the same infrastructure, which lets an organizer mix machine and human channels instead of choosing between them.
Latency is quoted at around 3.5 seconds to a translated sentence, with incomplete sentences held back until they make sense. Each listener needs under 50 kbit/s, less than a music stream. Audio reaches the laptop through XLR, a USB cable, Dante or other connections, though a built-in microphone is enough for a first test. Streamlingo 2.0, being announced at the time of review, adds automatic detection of the spoken language, a voice matched to the speaker and noticeably faster delivery, included on existing plans at no extra cost.
The company positions itself as an alternative to interpreting booths at a significantly lower cost, and its named references back the scale: osapiens ran a 2026 summit across seven parallel rooms in four languages each, Equip München used up to ten simultaneous languages, alongside Spring Harvest and Exponential Europe, with 250+ organizations claimed overall. The audiences it targets are specific: hard-of-hearing and deaf attendees, international guests, refugees and newcomers, parents stepping out with children, students following a lecture in a second language. The limits are stated openly, one input language at a time, monologue only, one event per account.
What it does
- Translate live speech into more than 80 languages and deliver it as audio to each listener's phone
- Show a live written transcript so attendees can read along instead of listening
- Distribute the stream through a link or QR code that opens in any browser, with no app
- Detect the spoken language automatically and speak it back in a voice matched to the speaker, with Streamlingo 2.0
- Apply a custom glossary for technical, biblical or subject-specific vocabulary
- Broadcast the original audio alongside the translated channels
- Carry human interpreters on the same infrastructure, and add or drop languages mid-event
When to use Streamlingo / When not to
A quick filter to help you decide if Streamlingo is the right fit.
When to use Streamlingo
- Event and conference organizers who need several rooms translated at once, as osapiens did across seven parallel rooms in four languages each
- Churches, faith communities and Christian conferences hosting international guests, refugees and newcomers, with a glossary for biblical vocabulary
- Universities and lecturers whose auditoriums mix native speakers with international students
- Hosts who care about accessibility, since the live written transcript lets hard-of-hearing and deaf attendees read along on their own phone
- Non-profits, NGOs and volunteer-run organizations that cannot fund a booth-and-interpreter setup for every public meeting
When not to use Streamlingo
- Teams that need a two-way multilingual group conversation: only one input language is live at a time, and the publisher itself advises against it
- Developers who want to embed translation in their own product: there is no public API and no developer documentation
- Anyone expecting a mobile app to install, on the speaker side or the listener side: Streamlingo runs in the browser only
- Organizations that must run several events in parallel from a single account, since each account hosts one event at a time
- Buyers looking to translate documents, subtitles or recorded files: the platform handles live speech, not written material
How to use Streamlingo
A typical end-to-end flow, from setup to results.
- Create a free account at app.streamlingo.net, which takes about five minutes and asks for no credit card
- Connect the laptop to the room's sound system, using a room microphone or a lapel microphone, or the built-in microphone for a first test
- Allow microphone access in the browser and select the right input device
- Choose the input language, or let Streamlingo 2.0 detect it automatically
- Press Start: translation begins immediately
- Retrieve the listener link and turn it into a QR code
- Check it yourself by scanning the code, picking a language and speaking into the microphone to hear what the audience will hear
- Announce the translation in advance, since guests need a smartphone, earphones and venue internet of under 50 kbit/s per listener
- Display the QR code on slides, posters or flyers, using the promotional materials downloadable from the account
- For the best audio quality, feed the mixing desk into the laptop through an XLR-to-USB cable
Pros & Cons
Pros
- Nothing to install on the audience side: a QR code and a browser remove the biggest practical obstacle at a live event
- More than 80 languages in audio and text, including languages rarely served by interpreting, such as Swahili, Zulu, Pashto, Sinhala and Maori
- Serious data protection groundwork for a company this size: an Art. 28 processing agreement published in the open, twelve subprocessors listed, EU-region platform data and an explicit claim that content is never used for AI training
- A permanently free tier of one hour of AI translation and ten listening hours, plus two trial hours without a credit card
- Per-minute billing, and nothing charged when a language is enabled but no one is listening
- Custom glossaries keep technical and biblical vocabulary intact rather than leaving it to the model
- Human interpreters can be carried on the same infrastructure, so the platform can complement them instead of replacing them by default
Cons
- One input language at a time: the publisher itself advises against group conversations, and video calls are supported as monologues only
- No public API and no developer documentation, an absence confirmed by the sitemap, so nothing can be embedded elsewhere
- No mobile app on either side, an assumed choice that closes off any use outside a browser
- One account hosts one event at a time, so parallel events require several accounts
- No standalone pricing page: prices live in three separate grids, one per vertical, which makes comparison awkward
- Prices are shown in euros only and include 19% German VAT, so buyers established elsewhere have to recalculate
- Translation quality carries no guarantee, and no security certification such as SOC 2 or ISO 27001 is mentioned anywhere on the site
Pricing & Plans
Two distinct price grids coexist, and both include a permanently free tier: a Free Plan on the monthly subscription used for churches and universities, and a Free Event on the one-time grid used for conferences, each covering one hour of AI translation and ten listening hours. The lowest paid entry point is the Small Plan at 44 EUR per month on the subscription grid, or 55 EUR as a one-time fee for a Small Event. An annual commitment reduces subscription prices by 20%. All amounts are quoted in euros and include 19% German VAT, and two hours of AI translation may be tried without providing payment details.
- prices include 19% German VAT and fall by 20% with an annual commitment
- 1 hour of AI translation included
- then 20 EUR per hour and language
- 10 listening hours included
- then 0.20 EUR per hour and listener
- 5 hours of AI translation
- then 11 EUR per hour and language
- 250 listening hours
- then 0.10 EUR per hour and listener
- 15 hours of AI translation
- then 10 EUR per hour and language
- 750 listening hours
- then 0.10 EUR per hour and listener
- 40 hours of AI translation
- then 9 EUR per hour and language
- 2
- 000 listening hours
- then 0.10 EUR per hour and listener
- prices include 19% German VAT and are charged per event
- 1 hour of AI translation
- then 20 EUR per hour and language
- 10 listening hours
- then 0.20 EUR per hour and listener
- 5 hours of AI translation
- then 11 EUR per hour and language
- 250 listening hours
- then 0.10 EUR per hour and listener
- 15 hours of AI translation
- then 10 EUR per hour and language
- 750 listening hours
- then 0.10 EUR per hour and listener
- 40 hours of AI translation
- then 9 EUR per hour and language
- 2
- 000 listening hours
- then 0.10 EUR per hour and listener
- between Small
- Medium and Large at any time on the subscription
- and event by event on the one-time grid
Data, GDPR & hosting
A consolidated view of how Streamlingo handles your data.
GDPR overview
Implementation is concrete rather than declarative. Streamlingo GmbH names itself as controller at its Karlsruhe address, cites Art. 6(1)(b), 6(1)(f) and 6(1)(a) as legal bases, and publishes its Art. 28 processing agreement as a PDF readable without registering, with an annex for church customers under §30(5) of the EKD data protection act. The policy lists the full set of rights (Art. 15, 16, 17, 18, 20, 21 and withdrawal of consent under Art. 7(3)), routes requests to info@streamlingo.net, and names the competent supervisory authority, the data protection commissioner of Baden-Württemberg in Stuttgart. Transfers outside the EEA rely on Art. 45 or standard contractual clauses under Art. 46(2)(c). Security measures cited are TLS, encryption at rest, access control with two-factor authentication and regular audits. No Art. 27 representative applies, the company being EU-based, and no data protection officer is named.
Who owns the data?
The terms are unusually explicit on ownership. Under §10(3), the rights to everything a user creates through the service, transcripts, translations and the audio generated from them, belong entirely to that user, and Streamlingo GmbH grants a right of use that is exclusive and unlimited in time, territory and content. The software itself, the Streamlingo trademark and their components remain the exclusive intellectual property of the publisher under §10(1), while §5(1) frames the customer license as non-exclusive and tied to the purpose and duration of the contract. Under the GDPR, Streamlingo is controller for sign-up, billing and usage data, and processor for event content, where the customer is the controller.
Reuse rights
Customers may reuse their transcripts, translations and generated audio freely, without asking permission: the exclusive and unlimited right granted by the terms covers reproducing, distributing, making publicly available and editing them, and the terms give publication on podcast platforms as an example. Two conditions come with that freedom. Any published translation must include an appropriate credit naming Streamlingo as the source (§5.2), and use that damages the publisher's reputation is prohibited. Copying, modifying or disassembling the software, reselling or sublicensing the service and sharing credentials outside the organization all remain forbidden. Streamlingo states that customer content is never used for AI training, and the customer stays responsible for the lawfulness of what is transmitted and for informing attendees that the event is being translated.
Data retention & training
Hosting summary
The site and the platform run on Google Cloud EMEA Limited infrastructure (Firebase) under an Art. 28 agreement, with platform data, database and file storage held in the EU region. Twelve subprocessors are published with their locations: Google Cloud EMEA and the Gemini API in Ireland, with Gemini processing taking place in the United States, Microsoft Ireland Operations, DeepL SE in Germany, Amazon Web Services EMEA in Luxembourg for DNS, Agora Lab, LiveKit and OpenAI L.L.C. in the United States, Sentry and HubSpot as US companies hosting in the EU, HubSpot in Frankfurt, Stripe Payments Europe in Ireland and Paddle.com Market in the United Kingdom. Analytics run on Plausible, on EU servers, with no cookies and no personal data. Transfers outside the EU and EEA rely on Art. 45 through the EU-US Data Privacy Framework, or on standard contractual clauses under Art. 46(2)(c). Audio routing is exclusively European for EU customers, while international customers get optimized routing that excludes servers in China. German law applies, with Karlsruhe as the place of jurisdiction. The domain resolves to a Fastly anycast address in the United States, which reflects content delivery rather than where data is stored.
Things to keep in mind
Risks and trade-offs to weigh before adopting Streamlingo.
- Translation quality varies and is not guaranteed: the terms state plainly that Streamlingo GmbH assumes no liability for translation errors, so a misrendered sermon, lecture or legally sensitive statement is the organizer's problem, not the publisher's
- Fluency is easily mistaken for fidelity: a smooth-sounding translation invites trust and quietly discourages anyone from checking whether it was actually right
- The tool is sold as costing significantly less than traditional interpreters, and used as a default rather than a complement it displaces a human profession, along with the judgment, cultural nuance and accountability that come with it
- Live audio and transcripts can incidentally carry Art. 9 data such as religious or philosophical beliefs, and it is the customer, as controller, who must handle that and inform attendees that the event is being translated
- Part of the processing happens in the United States through Agora Lab, LiveKit, OpenAI for speech synthesis and the Gemini API, while Paddle.com Market Ltd. acts as merchant of record in the United Kingdom for some payments
- Costs can run away: beyond the plan quota every additional language and every additional listener is billed by the hour, and displayed prices include 19% German VAT, so the real amount differs for a buyer established elsewhere
- The setup depends entirely on venue connectivity and on one account per event, so an unstable network or an unplanned parallel session breaks it or costs another account, and a publisher founded in 2024 with a team of eight is worth weighing before a multi-year commitment
Setup & Integrations
Technical difficulty
Low overall, with a clear asymmetry. Listeners do nothing: a smartphone, earphones and an internet connection. The organizer's side needs a little care. Creating an account takes about five minutes with no credit card, and the publisher claims readiness in under a minute, but real audio quality depends on feeding the room's sound into a laptop through XLR, a USB cable or Dante. A built-in microphone is enough for a first test. Allow roughly fifteen minutes of preparation beforehand and five on the day; a step-by-step PDF guide, per-vertical setup pages and phone support during installation are available.
Deployment
Supported languages
Behind Streamlingo
Social
Resources
All the official URLs gathered for verification and reference.
Frequently asked questions
Do listeners need to install an app?
How many languages are available?
Is there a free trial or a free plan?
How is usage billed once the plan quota is used up?
What equipment do I need at the venue?
How long is the delay before the audience hears the translation?
Can I use it for video calls or group conversations?
Is my content used to train AI models?
Can I change plan, and do I have to commit to specific languages?
Which payment methods are accepted and when is the invoice issued?
Should you pick Streamlingo?
Streamlingo makes a narrow promise and keeps its edges visible. One speaker, one room, an audience holding smartphones: within that frame it removes the two things that usually stop live translation from happening at all, the interpreting booth and the app nobody installs. More than 80 languages, audio and written transcript, a QR code and a browser.
What stands out beyond the product is the legal groundwork, unusually careful for a company that began in 2024 with eight people on its team page: an Art. 28 processing agreement anyone can read without registering, twelve subprocessors listed with location and legal basis, an annex for church customers under the EKD data protection act, EU-region hosting and a stated refusal to train models on customer content.
The reservations are as documented as the strengths, mostly by the publisher itself. Monologue only, one input language at a time, one event per account, no API, no app. Pricing is readable inside each grid but scattered across three pages, and per-minute overage by language can climb quickly on a multilingual day. Translation quality carries no contractual guarantee, since the terms disclaim liability for translation errors, and that matters most exactly where the content matters most, in a sermon, a lecture or anything with legal or medical weight.
Named and checkable references such as osapiens, Spring Harvest, Equip München and Exponential Europe, together with a permanently free tier, make the tool easy to try before committing. A young company on a multi-year commitment remains a bet, and two free hours cost nothing to test it.
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