No more missed calls, no more overloaded teams. Our voice AI agents answer every call, day and night, and run your campaigns at scale.
They run their calls on CallShift
Contact center · Social housing
1 of 5
Sofratel
200
housing operators
10,000 calls a day at peak, one agent fleet, zero entity-by-entity rebuild
Read the case studyThey also trust us
Integrates with
Six things the platform does, each with a customer running it.
Speech-to-speech & pipelines
Native speech-to-speech where a natural delivery converts, an STT → LLM → TTS pipeline where every word must be controlled. Both run in production, campaigns included, on your SIP trunk or our numbers.
Speech-to-speech vs pipeline50,000calls in under 3 hours, on their own SIPuMinds
Hybrid contact center
The agent answers first, resolves routine requests and transfers the rest, warm or cold, with the context of the call. It plugs in front of your switchboard, on your current numbers.
45%of on-call calls handled end to end by the AISofratel × Valophis
Multi-entity
One account and one invoice for the whole network, and one voice AI agent shared by every club, practice or agency, each keeping its own information. Every phone line stays in its entity, and an improvement validated at head office benefits all of them.
100clubs live 12 weeks after the pilot, in French and SpanishOnAir Fitness
Inbound
The agent takes the calls your team cannot, asks your qualifying questions, books the follow-up in your calendar and confirms it by SMS and email.
~0%missed calls, down from 55%, and +15% revenueBonnie&Car
Builder, API & Claude
Templates in the no-code builder, a REST API, custom tools that call your systems and an end-of-call webhook that pushes every call to your stack. Or steer it all from Claude with our skill.
100%of inbound handled without a human, steered from ClaudeDalia
Quality
Every call is flagged (reached, significant, successful) and judged on the success criteria you define, with an alert after each call and its transcript, summary and recording to review and improve the agent.
4/5average rating from callers, on 300+ calls surveyedBonnie&Car
Figures from each customer's production, not a contractual commitment.
Every feature in detail:Speech-to-Speech AI Voice AgentsMultilingual SupportReal-Time Quality MonitoringCall Builder, API, Webhooks & Claude Skill
The no-code builder: drop in steps, link them, and hit Try it out to talk to your agent straight away. Start from a built-in template to save time.
Four customers, four needs. Pick yours: the result, the setup behind it and the customer's words, all from production.
Sofratel × ValophisContact center · Social housing
Sofratel's 200-seat contact center runs the 24/7 on-call line of 200 social housing operators. A CallShift agent now answers first: it handles routine requests end to end and hands urgent and sensitive calls to Sofratel's agents, with the context. Valophis measured the result on its own line.
45%of on-call calls handled end to end by the AI at Valophis, with no agent involved
Observed in production at Valophis
Fewer nuisance calls, more time per case, and the peaks (opening time, rent reminders, the heating season) absorbed with no extra staff and no outsourced overflow.
Valophis figures, measured on its on-call line, not a contractual commitment.
OnAir FitnessFitness franchise · 100 clubs
A fitness franchise, one agent script in every club and no work left to the clubs: CallShift built the marketing and sales templates once, then deployed them across the network and keeps them up to date, in French and Spanish.
100clubs on the same script, 12 weeks after the pilot club
Why they chose CallShift
The multi-entity, done-for-you model and the GDPR support decided it: the templates are deployed and kept up to date for the clubs, not by them.
OnAir Fitness rollout figures, not a contractual commitment.
uMindsCreator sales funnels · 10+ creators
uMinds runs the sales funnels of more than ten creators. In a head-to-head A/B test live in production, their Spanish speech-to-speech agents beat the Cartesia + GPT-4.1 mini + Deepgram pipeline they ran before on the metric that pays: performance. Same campaign, one architecture swapped.
~20%better performance than their orchestrated pipeline, A/B tested in production
“I thought the biggest voice providers would be impossible to compete with. But CallShift focused on what others were missing. With strong bets on models like Gemini, they’ve delivered the quality and pricing that made us move away from other providers. For me, CallShift is the future of voice infrastructure.”
Francesco Haces MunozCofounder, uMindsFigures reflect one customer's production configuration and results, not a contractual commitment.
Bonnie&CarUsed-car marketplace
Bonnie&Car, a French online marketplace for used cars, saw more than half of its inbound calls go unanswered. Its CallShift voice agent now picks up every call, qualifies half of them on its own and keeps the line open longer, with no extra staff.
~0%missed calls, down from 55%
“We went from 55% missed calls down to basically 0%. We turned around data and concluded the impact was +15% revenue last month thanks to CallShift.ai.”
Jean-Charles RoyCEO, Bonnie&CarFigures from Bonnie&Car's production, not a contractual commitment.
We entered our partnership with CallShift.ai with complete peace of mind. They are a quality partner, close to their clients, and show great adaptability in every circumstance. The tailor-made solution they proposed fits our expectations perfectly, as well as those of our own clients.
I thought the biggest voice providers would be impossible to compete with. But CallShift focused on what others were missing. With strong bets on models like Gemini, they’ve delivered the quality and pricing that made us move away from other providers. For me, CallShift is the future of voice infrastructure.
CallShift lets us automate part of our inbound and outbound calls, which really takes the load off our staff day to day. Maxime and his team are always very responsive and attentive 👌🏻
Support
“The support has been perfect: responsiveness, regular meetings, continuous data sharing. We couldn’t ask for better.”
Marc Monkam-DaveratInnovation LeadMissed calls
“CallShift.ai had significantly reduces frustration of our customers trying to call us we fail answering.”
Florian PerthuisotSales ExecutiveEase of use
“The interface is intuitive and accessible, and the bot’s ability to evolve is impressive.”
Marc Monkam-DaveratInnovation LeadAutomation
“It’s automatic! It automates basic & routine tasks for us.”
Jean-Charles RoyCEOInbound or outbound, each of these runs in production for a customer today. Start with one, add the next once it works.
Answers when your team can't, at peak or out of hours, qualifies the caller and books the follow-up.
Books appointments straight into your calendar and confirms them by SMS and email.
Answers the routine requests itself, gives the caller the first step, and hands the rest to the right person with the context of the call.
Asks your qualifying questions first, so your team spends its time on the callers worth it.
Calls your lists by the tens of thousands on your own telephony, and sends every call's outcome back to your stack.
Drop our skill into Claude and drive your whole environment in plain language: list and duplicate agents, review a campaign's ROI, add contacts, assign SIP numbers, wire up webhooks. It talks to our API for you.
Add it in Claude under Settings → Capabilities → Skills, or drop it in your Claude Code skills folder.
All about how to improve your call centers, one topic at a time.
CallShift.ai is the only voice AI platform that masters the last mile of multilingual appointment scheduling. We deliver patient-centric, human-like reminders in French, Flemish, Spanish, and English to reduce no-shows and maximize operational impact in hearing care.
Maxime GrandjeanCall Extensions in Google Ads Ads can boost CTR and conversions, but not all campaigns benefit equally. Discover a simple framework for using Call Extensions effectively and learn how CallShift AI can maximize your call strategy.
Maxime GrandjeanBonnie&Car, a leading online car sales platform, saw 55% of their inbound calls go unanswered, leading to missed opportunities and reduced customer satisfaction. After adopting CallShift.ai’s AI-powered voice agent, Bonnie&Car eliminated missed calls, extended business hours by 50%, qualified 50% of calls automatically, and increased revenue by 15%. Discover how CallShift.ai can help you improve your call management today.
Maxime GrandjeanVoice communication is integral to human interaction, making it a powerful tool for customer service. Despite the rise of digital channels, voice remains essential for connecting with customers. Discover in this article how CallShift.ai enhances voice communication in call centers, aiming to boost customer satisfaction and operational efficiency.
Maxime GrandjeanCustomer support centers continually strive to enhance their service efficiency and customer satisfaction. One critical metric that can significantly impact these objectives is the repeat call rate. Explore industry benchmarks along with actionable strategies to improve it.
Maxime GrandjeanHere, you'll find answers to some of the most common questions about our services and how we can help transform your call center operations.
With our Claude skill, it takes only minutes: you drive the setup in plain language and Claude does it through our API. With a template, onboarding is immediate too. A custom agent goes live in 1 month on average, with a dedicated customer success manager: our engineers map your call flows with you, and the agent's performance is reviewed every week on the indicators you care about, such as average handle time, bookings per caller or satisfaction (NPS).
Starter is €40 a month with 100 minutes included, then €0.50 per extra minute; Professional is €350 a month with 1,000 minutes, then €0.40; Scale is priced on your volume, down to €0.15 a minute. Both plans are monthly, with no setup fee, and the yearly plans save 20%. See the pricing.
Both, chosen use case by use case. A pipeline (speech-to-text, then an LLM, then text-to-speech) keeps every turn as text you can inspect and constrain; a native speech-to-speech model such as Gemini 3.1 Flash Live answers faster and sounds more natural. Speech-to-speech runs on models from Google (Gemini Live), OpenAI and xAI; pipelines on OpenAI models with Cartesia or Gradium voices. Compare them on your own prompt in the architecture simulator, or read speech-to-speech vs pipeline.
Yes. 10 concurrent lines are included, and each extra line is €10 a month on Starter and Professional. In production, one customer completed 50,000 calls in under 3 hours on 45 concurrent lines. Size your own campaign in the outbound campaign simulator.
Our HQ is in Paris and your call data stays in the EU: hosting, storage and voice processing run on providers in France and Germany. CallShift is GDPR compliant, with ISO 27001 and health-data hosting (HDS) available. The infrastructure follows SOC-2 Type II best practices with an SSO-only policy, and can meet HIPAA requirements.
Agents are set up in French, English, Spanish, Dutch or Portuguese, and French and Spanish run at scale in production today. With speech-to-speech models, tone, accent and style are steered from the prompt. For dictated emails and numbers, we have the agent read them back before confirming, and use a pipeline where that precision matters most. Need another language? Ask an engineer: we test it on your own calls first.
Every call is scored: flags on 100% of calls and a verdict against the success criteria you define, with an alert after each call. We control quality at the knowledge brick level and can pre-train the agent on your call recordings with you, so it meets your standards from the very beginning.
Yes: creating your environment is free. Explore the app and the builder, set up your agents, prompts and flows. Any call needs an active plan, from €40 a month with Starter. Start at https://app.callshift.ai/
Yes, we can meet in person at any time to discuss your specific needs and how CallShift.ai can help transform your call center operations. Contact our sales team to schedule a meeting.
Contact us
Book a call with a voice AI engineer: we start from your real call flows and show you the agent, the architecture and the numbers that fit them.
