Speech-to-speech voice AI, finally built to scale.
A dedicated plan on Gemini 3.1 Flash Live: the latency of a real phone call, at €0.08 / min.
Google gives you the model. CallShift is the only platform that delivers it on your live calls, at scale.
Self-serve. No sales call. Live in minutes.
Powered by- 1,000,000+ calls handled
- Born at Station F, Paris
- EU AI Act compliant
Gemini gives you the model. We put it on the phone, at scale.
The model is public. Turning it into reliable phone calls at volume is the hard part, and it's the part we own.
You build it, you maintain it
- The realtime bridge between your telephony and the model.
- Concurrency and scaling to hundreds of lines.
- Multi-account management, monitoring and failover.
- STT → LLM → TTS chains that add latency at every hop.
Months of glue code you keep maintaining.
Connect your telephony, go live
- Native speech-to-speech, no STT → LLM → TTS chain.
- ~20% better performance than an orchestrated stack, A/B tested.
- Production-scale concurrency and multi-account access, built in.
- One simple price: €0.08 per minute.
Live in minutes, not months.
Pipeline orchestration (Cartesia + GPT-4.1 mini + Deepgram) still runs on our standard plans. We operate both, so the ~20% is a real, apples-to-apples result.
State-of-the-art voice AI, at real-world scale.
Gemini 3.1 Flash Live, infrastructure for real volume, two ways to build, and tools made for agencies.
State-of-the-art voice AI
The most natural, lowest-latency speech-to-speech available today.
About GeminiScales in production
No concurrency ceiling. Built for real call volume.
No-code, 1000+ connectors
Make.com, n8n or custom webhooks. Onboard a new client in minutes, no engineering required.
Multi-account access
Every client in its own sub-account, managed from one place.
About 20% better than their old pipeline.
In a head-to-head A/B test, one customer's Spanish-language 🇪🇸 speech-to-speech agents beat their previous Cartesia + GPT-4.1 mini + Deepgram stack on the metric that pays: performance. They run the whole operation across 3 sub-accounts from one place.
And it scaled on the very same campaign
The customer, in their own words
View on InstagramFigures reflect one customer's production configuration and results, not a contractual commitment.
Don't take our word for it. Hear it.
Drop in your number and our Gemini 3.1 Flash Live agent calls you within seconds.
- 1Tell us who you are and what to talk about.
- 2We trigger a speech-to-speech outbound call.
- 3Pick up, and judge the latency for yourself.
Frequently asked.
There are other speech-to-speech models. Why Gemini 3.1 Flash Live?
It's the current sweet spot for voice AI: intelligence, low latency, Google's worldwide infrastructure and cost, all in one.
Why can't I just use Gemini myself?
The model is the brain. Bridging it to live calls at scale, with concurrency, multi-account and reliability, is a different job, and it's the one CallShift handles for you.
What does it cost, and are there hidden fees?
€100/month gives you platform access with 100 minutes included, plus €0.08/min after that. No tokens, no sub-provider bills, billed in 1-minute increments. Connect your own telephony (Twilio or SIP), or contact sales.
Speech-to-speech or pipeline orchestration: which is right for me?
Native speech-to-speech wins on latency and tests ~20% better overall. Pipeline orchestration stays available on our standard plans for use cases that favour it.
How do I get started, and do I need engineers?
It's self-serve: activate the plan, connect your telephony, then build with the API or the no-code interface. Most teams are live in minutes.
Can it handle real volume and stay reliable?
Yes. It runs on Google's worldwide infrastructure; one customer completed 50,000 calls in under 3 hours at 300 concurrent lines.
Lock in €0.08/min before summer ends.
Self-serve, no sales call.