Translate live
phone calls.
In real time.
Any language.
BabelStream drops two-way voice translation into the phone system you already run — cloud or on-prem. Sub-second latency, 50+ language pairs, no app required for the caller.
"We need to confirm the delivery date for the next shipment — can you check availability for Thursday?"
"Sí, el jueves está disponible. ¿Podemos confirmar antes del mediodía?"
Latency
210ms
Language pair
EN → ES
Confidence
98.4%
Path
On-Prem
Sub-second
Translation latency
50+
Language pairs
3
Deployment options
Cloud · Private Cloud · On-Prem
99.9%
Uptime SLA
Built for production
Built for real phone calls, not demos
Real telephony environments are noisy, compressed, and unpredictable. BabelStream is engineered for that reality, not a studio recording.
Real-time, not transcript.
Sub-second turnaround on the live audio path. The caller speaks; the listener hears their language — no post-call processing, no transcription pipeline.
Telephony-aware audio.
Built for narrow-band, packet-loss, codec-degraded reality — not pristine podcast input. Handles the G.711 and G.729 audio you're actually sending.
Route however you operate.
Prefix codes, time-of-day, language-of-caller, fallback chains. Configured in your routing layer, not coded into a custom integration every time.
Per-call observability.
Every translated minute and language pair is exportable. Built for finance and ops review — usage data that actually fits into your reporting tools.
Encrypted by default.
TLS in transit, signed media. No recordings stored unless your team explicitly opts in. Designed for regulated environments from day one.
Deploy where data lives.
Same product in your VPC, your data center, or ours. One SDK, one config schema — your data sovereignty requirements don't require a forked product.
Call Flow
Caller dials in
Existing SIP trunk, same DID. No changes for the caller.
BabelStream intercepts the media path
Audio forks at the media gateway — no call disruption.
Real-time translation engine
Sub-second STT → translate → TTS pipeline, tuned for telephony codecs.
Both sides hear their language
Translated audio injected back into the existing call path.
No hardware required. Works with your existing Asterisk, FreeSWITCH, Cisco, or cloud UCaaS stack. We meet you where you are.
Architecture
Plugs into the phone system you already run
No rip-and-replace. BabelStream integrates at the media layer, leaving your dial plan, routing logic, and carrier relationships intact.
SIP-native integration
Connects via standard SIP trunking. No proprietary API required on your PBX.
Caller experience unchanged
No app download, no PIN, no transfer. The caller just hears translated audio.
One config schema across all deployment modes
Cloud, private cloud, on-prem — same configuration format. Migrate between modes without re-integrating.
Pilot in under 48 hours
Most pilots are live in two business days. No professional services engagement required to get started.
Use cases
Who uses BabelStream
Anywhere language barriers slow down phone-based operations, BabelStream removes them — without changing the underlying workflow.
Call Centers
Serve every caller in their language without bilingual staffing requirements or language-specific queue routing.
Healthcare
Live patient conversations with on-prem-deployable handling for regulated environments and PHI data residency requirements.
Public Sector
Multi-language constituent service with controlled-environment delivery and audit-ready data exports for compliance teams.
Legal & Compliance
Reduce friction across language barriers without external interpreters — keeping sensitive conversations in your controlled infrastructure.
Operations & Logistics
Multilingual team coordination across regions and shifts — without interpreter scheduling delays or conference bridge complexity.
Global Sales
Open conversations with markets your team doesn't natively speak — your reps close deals, not language gaps.
Deployment
Deploy where your data lives
One product, three deployment modes. Pick the model that fits your data residency, compliance, and operational requirements.
Cloud
Hosted infrastructure, managed by BabelStream. Fastest pilot path — connect your SIP trunk, configure routing, go live.
- Live in under 48 hours
- Zero infrastructure to manage
- 99.9% SLA, fully managed
Private Cloud
Deployed in your VPC (AWS, Azure, GCP). You own the data residency; we manage the software lifecycle.
- Data stays in your cloud account
- Managed upgrades and monitoring
- Scales with your call volume
On-Premises
Fully air-gapped deployment in your data center. For regulated environments where cloud connectivity isn't an option.
- No external network required
- Full data sovereignty
- Meets strictest compliance requirements
All three modes use the same SDK, the same config schema, and the same API. Compare deployment options →
Start translating calls this week.
Get a pilot running in under 48 hours. No hardware. No new carrier. Works with the SIP trunks and PBX you already have.
No commitment required for a pilot. We'll set it up on a test DID so you can evaluate before any production change.