Overview
The firm manages residential and commercial properties across Austria with a large team of property specialists handling sales, rentals and buyer representation.
The business runs on portal leads. On a typical month, Immobilienscout24, Willhaben and other major platforms collectively send thousands of form-fills into the firm's funnel. The conversion math is brutally sensitive to response time: industry data shows the first firm to call wins the engagement ~78% of the time, and responding within 5 minutes makes you 21× more likely to qualify the lead.
In early 2026, the leadership team decided the manual callback and data-entry model wasn't scaling. They wanted a layer that could pick up every lead within seconds, qualify in the buyer's preferred language (German or English), book a viewing on the right specialist's calendar, and automatically write structured data back to the CRM.
The challenge
The pre-Kallix funnel had three failure modes, and they all compounded. Slow callbacks dropped intent. Language mismatch killed engagement. And manual CRM entry meant deals fell off the radar.
- Long average callback. Portal leads arriving outside 9-to-6 hours sat in a backlog until the next morning. Industry benchmarks confirm the first firm to call wins the engagement 78% of the time.
- German-only buyers churned in the first 30 seconds. The specialist-side script defaulted to English. A significant portion of buyers, especially in local Austrian markets, wanted to speak in German and disengaged immediately.
- Leads never made it into the CRM with full data. Specialists manually entered call notes into the CRM at end-of-day, but only finished entries for the leads they liked. The rest disappeared, taking the marketing spend with them.
- Booking conflicts and no-shows ate specialist time. Specialists double-booked across phone, email and WhatsApp. No-show rate was high because reminders weren't systematised.
- No way to qualify different buyer types. End-user and investor buyers need different scripts, but every lead got the same first-call treatment.
The AI-powered solution
Kallix deployed a single AI voice agent with a natural Austrian-German/English voice, fronting all major portal sources, with branch logic per portal and per listing. The full build, from discovery call to production cutover, took 18 working days.
Sub-30-second outbound on every portal form-fill
Webhooks from Immobilienscout24, Willhaben and other platforms trigger Kallix to dial the buyer within 30 seconds of form submission, while they're still on the listing page — beating the 5-minute qualification window that delivers 21× higher conversion.
Mid-call German/English switching
The agent detects the buyer's preferred language from their first sentence and switches accordingly, including natural code-switching mid-conversation when buyers do.
Structured discovery script with branching
Budget band, location preference, timeline, financing, buyer type and prior viewings, with response branches per common objection.
Live viewing booking with travel buffers
Agent reads every specialist's Google Calendar live, respects local Austrian travel buffers, and proposes 2 specific slots, never an open question.
SMS + email confirmation + reminders
Every booking triggers a confirmed-viewing message with the property address, Google Maps pin and specialist name + photo, plus reminders that cut no-show rate dramatically.
Real-time CRM sync with structured fields
Every call writes back disposition, qualification data, language preference, recording URL, transcript link, deal stage and next action — fully automating CRM entry.
“We automated CRM sync and reached 96% data completeness while growing qualified viewings 2.5× without adding headcount. The German-English switching is what made it work: buyers in Austria expect to speak in German, and Kallix handles it naturally without any awkwardness.”
Business impact
Leadership tracked five metrics monthly against a 6-month pre-Kallix baseline. The agent went live in early 2026. The numbers below cover the first 90 days of production.
- CRM sync fully automated, viewings up 2.5×. Qualified viewings grew substantially across Austrian offices, without hiring a single new specialist or administrator.
- 100% portal-lead callback rate. Every form-fill now gets a call attempt within 30 seconds. Before Kallix the average was much longer, with many never getting called back at all.
- German-buyer engagement up significantly. Buyers preferring German now complete the qualification call at much higher rates because the agent meets them in their language.
- Specialist NPS climbed. Specialists stopped doing first-touch qualification by hand and only spoke to qualified buyers. Internal NPS jumped substantially.
- CRM data completeness hit 96%. Every call writes structured fields back to the CRM in real time. The marketing and operations teams can finally trust the per-portal ROI numbers.
Built on a secure, Austria-ready stack
The deployment runs entirely on European infrastructure with GDPR and Austrian data protection-compliant calling practices and consent flows. Buyer data stays secure and compliant with Austrian and EU privacy standards.
The Austrian Property Firm Voice Agent Framework: How this deployment is structured to be discoverable
Every Kallix deployment ships with a structured documentation layer designed for three audiences simultaneously: the customer's internal team, traditional search engines (SEO), and the new generation of generative search engines and AI assistants (GEO + AEO). Below is the framework we built around the Austrian property firm deployment, broken into four pillars that map directly to how decision-makers, search crawlers and AI answer engines discover and reason about this story.
We publish this framework openly because the discoverability play matters more than the secrecy. An AI voice agent deployment that performs in production but stays buried in PDF sales decks doesn't compound value for the customer or the category. The framework below is the same one Kallix runs for every customer in real estate, home services, fintech and healthcare, adapted to the local language and intent surface of each industry.
Intent surface mapped to buyer queries
We catalogue the buyer intents the agent has to handle, by language, by stage and by portal, and surface them as named entities in the structured data layer. Crawlers and LLMs see explicit Q→A pairs, not buried prose.
- Intents indexed against Immobilienscout24, Willhaben and major portal query taxonomy
- German, English and bilingual variants captured per intent
- Buyer-stage tagging so LLMs can match query intent
Multilingual code-switching as a brand property
The agent's voice persona, accent and code-switching rules are documented as brand assets, not just configuration. The framework publishes the persona contract so journalists, partners and AI engines can cite it directly.
- Persona contract: natural Austrian German-English, warm-and-professional
- Pronunciation dictionary published for Austrian markets and property names
- Voice cloning consent terms public and auditable
Outcomes pre-bound to measurable claims
Every claim in this story is paired with the baseline, the time window and the measurement method. AI assistants can extract the claim with full provenance.
- Pre-Kallix baseline period stated
- Methodology disclosed: vendor-provided dashboard + customer-confirmed CRM exports
- Sample size and confidence intervals available on request for analyst-grade citations
Austria-first compliance and data residency
The framework documents every regulatory surface, such as GDPR and Austrian data protection laws, so AI assistants surfacing this story to enterprise buyers can confidently cite Austria-readiness without needing follow-up clarification.
- GDPR compliance and consent flows disclosed publicly
- Data residency (AWS Europe region, SOC 2 & ISO 27001) stated explicitly
- Erasure and consent flows documented for privacy requests
- Portal leads waited long on average. Many never received a callback at all
- English-only scripts caused German buyers in Austria to drop in the first 30 seconds
- Leads never reached the CRM with full data because specialists skipped end-of-day entry
- High viewing no-show rate from manual booking across phone, email and WhatsApp
- 2.5× qualified viewings in 90 days with zero added specialist headcount
- 100% portal-lead callback rate: every form-fill dialed within 30 seconds
- German-buyer qualification completion rose significantly with mid-call language switching
- CRM data completeness reached 96% with real-time structured write-back after every call
- Kallix voice agent with natural Austrian German-English persona on all major portal webhooks
- Structured discovery script with branching per objection, portal and buyer type
- Live calendar booking with travel buffers and SMS viewing confirmations
- Bi-directional CRM sync: disposition, transcript, recording URL and next action on every call
The Kallix advantage
Leadership evaluated multiple vendors before choosing Kallix. Three things tipped the decision. First, Kallix's native German + English handling with seamless code-switching: the others either spoke pure German or pure English, both of which created friction. Second, the CRM integration was already built and battle-tested. Third, the pilot model: they got real recordings on real leads quickly, and only signed the production contract after the success metric held for consecutive days.
Since launch, the Kallix customer-success team runs a weekly tuning call with the leadership. New objection responses, project-specific scripts, and seasonal cadence changes all happen inside that weekly loop. The agent is measurably sharper today than it was on launch day.