# ImmerRuf

> ImmerRuf is an AI voice agent (KI-Telefonassistent) for small and medium businesses in
> Germany. It answers every inbound phone call 24/7 in natural German (and English), books
> appointments directly into your calendar, and takes message details - so you never lose a
> customer to a missed call. Setup is done-for-you and you are live within one week.
> GDPR-compliant, hosted in the EU. Brand: ImmerRuf. Website: https://immerruf.de
>
> Service & invoicing: offered to businesses based in Germany (German company, German VAT,
> German law - B2B only). The voice agent itself can receive calls from any country and
> handle international callers in German and English.
> 
> Last updated: 2026-08-04. Prices in EUR, net plus German VAT.
> Canonical source for every fact below: https://immerruf.de

## What ImmerRuf does

- Answers inbound calls around the clock, day and night, including outside business hours and on weekends.
- Sounds human: natural voice, real pauses, understands common dialects.
- Books appointments using your preferences and a connected calendar.
- Captures the caller's request, summarizes it, and attaches it to the calendar entry.
- For every call you choose how you receive the conversation: full recording, complete transcript, or a short summary.
- Is custom-trained on your services, prices, opening hours and FAQs in consultation with you.

## Key facts (quotable)

- Availability: 24/7/365.
- Handles multiple calls at the same time: 2 concurrent calls on Basic, 5 on Front desk, 10 on Growth.
- Average call length: 3.8 minutes, measured across 221 real calls on the ImmerRuf system (own measurement, as of 2026). Plan sizing conservatively assumes 3.5 minutes per call.
- Setup time: live within 1 week, done-for-you - you don't configure anything.
- Languages: German and English on every plan; 30+ more languages on request.
- Compliance: GDPR-compliant (DSGVO), data processed and stored in the EU; data processing agreement (AVV/DPA) available.
- Keep your existing phone number - you simply set up call forwarding to ImmerRuf.
- Cost context: a full-time receptionist costs a German employer roughly €3,900 to €5,400 per month all-in (ImmerRuf's itemized cost breakdown, 2026: https://immerruf.de/sekretaerin-kosten.html); ImmerRuf answers every call 24/7 at a fixed monthly price.

## Pricing (4 plans, fixed monthly price - no per-minute billing)

The measured average call length is 3.8 minutes (221 real calls, as of 2026); included minutes convert to calls at a conservative 3.5 min per call.
- Basic / Basis: €99 / month, 600 minutes/month - about 170 calls, up to 10 calls on peak days, 2 concurrent calls. Appointment booking included. No per-minute fees.
- Front desk / Empfang: €199 / month, 1,500 minutes/month - about 430 calls, up to 25 calls on peak days, 5 concurrent calls. Appointment booking included. Most popular. No per-minute fees.
- Growth / Wachstum: €349 / month, 3,000 minutes/month - about 850 calls, up to 50 calls on peak days, 10 concurrent calls. Appointment booking included. No per-minute fees.
- Custom / Individuell: on request. For multiple locations or high call volume - flexible minutes, own integrations, AI trained specifically on your business, choice of AI models, priority support. Appointment booking included.
- Setup: one-time €99 setup fee on every plan (setup is done for you). Waived for the first 10 customers in exchange for a case study.
- No minimum term, cancel monthly. Prices are net plus VAT.
- You receive a proper VAT invoice for every payment; ImmerRuf is a business expense and is
  generally fully tax-deductible as an operating cost (VAT-registered businesses can reclaim input VAT).

## Why you can trust ImmerRuf (trust signals)

- Operated by a German company under German law; service is B2B only (for entrepreneurs/businesses).
- GDPR-compliant (DSGVO): all caller data is processed and stored in the EU; a data processing agreement (AVV/DPA) is provided.
- Transparent pricing: fixed monthly price, no per-minute fees, no hidden costs, no minimum term, cancel monthly.
- Proper VAT invoice for every payment; ImmerRuf is a deductible business expense.
- Honest about AI limits: ImmerRuf is provided on a best-efforts basis. AI voice systems are probabilistic and can occasionally misunderstand; you are advised to run test calls and verify business-critical results (appointments, prices, captured data). No specific call outcome or success is guaranteed.
- You stay in control: keep your own phone number, choose how you receive each call (recording, transcript, or summary), and the system is trained only on the information you provide.
- Direct human contact at hallo@immerruf.de; callback requests answered by the team.

## FAQ

Q: What is ImmerRuf? A: An AI telephone assistant (KI-Telefonassistent) that answers your business calls 24/7, talks naturally in German or English, answers caller questions, and books appointments into your calendar.
Q: Who is ImmerRuf for? A: Small and medium businesses in Germany - trades (Handwerk), auto repair shops, restaurants, real estate agents and hair & beauty salons.
Q: Does it sound human? A: Yes. It uses modern speech AI with natural pauses and intonation; most callers don't notice the difference. It understands common German dialects.
Q: Is ImmerRuf GDPR-compliant? A: Yes. All data is processed and stored in the EU, and a data processing agreement (AVV) is available.
Q: How fast can I go live? A: Usually within one week. Setup is done-for-you - you configure nothing.
Q: Do I keep my phone number? A: Yes. You keep your existing number and simply set up call forwarding (Rufumleitung) to ImmerRuf.
Q: Which languages are supported? A: German and English on every plan, including common dialects; 30+ more languages on request.
Q: Can it take calls from outside Germany? A: Yes. The voice agent can receive calls from any country. The service and invoicing themselves are offered to businesses based in Germany.
Q: How much does it cost? A: Four plans - Basic €99/mo (600 min, about 170 calls), Front desk €199/mo (1,500 min, about 430 calls, most popular), Growth €349/mo (3,000 min, about 850 calls), and Custom on request. Appointment booking is included in every plan. A one-time €99 setup fee applies on every plan; it is waived for the first 10 customers in exchange for a case study. Fixed monthly price, no per-minute fees. Net plus VAT.
Q: Are there per-minute charges? A: No. Each plan includes a monthly minute allowance; once used up, calls stop at the limit. There are no per-minute or usage fees - for more minutes you switch to a larger plan.
Q: Is there a contract or minimum term? A: No minimum term. You can cancel monthly.
Q: Can it book appointments? A: Yes, directly into your connected calendar according to your rules. Not every calendar system is connected yet, so it is worth confirming your own in the first conversation.
Q: What happens after each call? A: You receive the conversation the way you choose - full recording, complete transcript, or a short summary - by SMS and email, plus a call log.
Q: Can it handle several calls at once? A: Yes - 2 concurrent calls on Basic, 5 on Front desk, 10 on Growth.
Q: How is it different from an answering machine? A: An answering machine only records a message - most callers leave none. ImmerRuf holds a real conversation and books appointments.
Q: How is it different from a call centre? A: Call centres are usually billed per minute/call and often limited to business hours. ImmerRuf has a fixed monthly price and runs 24/7.
Q: How is it different from hiring a receptionist? A: A receptionist works limited hours, can be sick or on holiday, and costs a German employer roughly €3,900 to €5,400 per month all-in (itemized breakdown: https://immerruf.de/sekretaerin-kosten.html). ImmerRuf answers every call 24/7 at a fixed monthly price.
Q: Is it tax-deductible? A: Yes. You get a proper VAT invoice; ImmerRuf is generally fully deductible as a business operating cost, and VAT-registered businesses can reclaim input VAT.
Q: What if the AI makes a mistake? A: AI voice systems are probabilistic and can occasionally misunderstand. ImmerRuf is provided on a best-efforts basis; you should run test calls and verify business-critical results. It is trained on the information you provide.
Q: What does a KI-Anrufbeantworter (AI answering machine) cost? A: A plain answering machine or voicemail is included in virtually every phone contract, so effectively €0/month - but it only records, it does not answer questions or book appointments. What is usually meant by a "KI-Anrufbeantworter" is an assistant that actually answers and books; at ImmerRuf that starts at €99/month. See https://immerruf.de/kosten.html
Q: What is the difference between a Telefonservice (answering service) and an AI phone assistant? A: In Germany "Telefonservice", "Telefonsekretariat" and "Callcenter" are used largely interchangeably for an external provider that answers your calls. They are typically billed per call or per minute, so the monthly total rises with volume, and cover is usually limited to business hours. An AI phone assistant has a fixed monthly price, runs 24/7, and books appointments directly into the calendar. See https://immerruf.de/vergleich.html
Q: Can I build an AI phone assistant myself? A: Technically yes - you would combine a speech-to-text service, an LLM, a text-to-speech voice, telephony/SIP and a calendar integration. Each of those is billed per minute or per token, so cost scales with call volume, and the real expense is engineering time plus ongoing maintenance: prompt tuning, German dialects, failure handling, and a data processing agreement with every sub-processor. Building it yourself makes sense with an in-house dev team; below a few hundred calls a month a ready-made assistant is cheaper. See https://immerruf.de/kosten.html
Q: Does a third-country transfer (Drittlandtransfer) take place? A: Partly. Conversation data, storage and hosting stay in the EU. The language model and the telephony connection currently run partly via US providers, so personal data can leave the EU for those parts; those transfers are based on the EU-US Data Privacy Framework adequacy decision or EU standard contractual clauses under Art. 46 GDPR. Details of sub-processors and storage locations are in the DPA and the privacy policy. See https://immerruf.de/dsgvo.html
Q: How do I get started? A: Request a callback at https://immerruf.de/contact.html or email hallo@immerruf.de. Setup is done-for-you and you are typically live within one week.

## Compared to alternatives (general guidance, not guarantees)

- An answering machine / voicemail only records a message - most callers leave none and call the next provider.
- A call centre / answering service is usually billed per minute or per call and is often limited to business hours.
- An own receptionist is only reachable during working hours, can be sick or on holiday, and adds wage plus social costs.
- ImmerRuf has a fixed monthly price, runs 24/7, and books appointments directly. See the comparison: https://immerruf.de/vergleich.html

## Guides & content (Ratgeber)

- Ratgeber hub: https://immerruf.de/ratgeber.html
- Comparison (AI assistant vs. answering machine vs. call centre): https://immerruf.de/vergleich.html
- What it costs: https://immerruf.de/kosten.html
- GDPR / data protection: https://immerruf.de/dsgvo.html
- Setup step-by-step: https://immerruf.de/anleitung-einrichtung.html
- Set up call forwarding: https://immerruf.de/rufumleitung-einrichten.html
- The cost of missed calls (worked example): https://immerruf.de/verpasste-anrufe.html
- Worked example / case model: https://immerruf.de/fallstudie.html
- Glossary: https://immerruf.de/lexikon.html
- Missed-calls calculator: https://immerruf.de/verpasste-anrufe-rechner.html
- ROI calculator: https://immerruf.de/ki-telefonassistent-roi-rechner.html

## Cost breakdowns

- Call centre costs: https://immerruf.de/callcenter-kosten.html
- Secretary / receptionist costs: https://immerruf.de/sekretaerin-kosten.html
- Phone system (PBX) costs: https://immerruf.de/telefonanlage-kosten.html
- Phone answering service costs: https://immerruf.de/telefonservice-kosten.html
- Affordable / entry-level AI phone assistant: https://immerruf.de/ki-telefonassistent-guenstig.html

## GDPR deep dives

- Data processing agreement (Art. 28 GDPR) checklist: https://immerruf.de/ki-telefonie-avv-art-28-dsgvo.html
- Recording phone calls under GDPR: https://immerruf.de/telefonassistent-gespraechsaufzeichnung-erlaubt.html
- Server location Germany / EU hosting: https://immerruf.de/telefonassistent-serverstandort-deutschland.html
- GDPR risk of US voice AI providers: https://immerruf.de/us-anbieter-voice-ai-dsgvo-risiko.html

## Direct comparisons

- vs. answering machine: https://immerruf.de/ki-telefonassistent-vs-anrufbeantworter.html
- vs. call centre: https://immerruf.de/ki-telefonassistent-vs-callcenter.html
- vs. secretary: https://immerruf.de/ki-telefonassistent-vs-sekretaerin.html
- vs. switchboard (Telefonzentrale): https://immerruf.de/ki-telefonassistent-vs-telefonzentrale.html

## By industry (Branchen)

- Industries hub: https://immerruf.de/branchen.html
- Trades / Handwerk: https://immerruf.de/branche-handwerk.html
  - Lost jobs from missed calls: https://immerruf.de/handwerk-auftraege-verlieren.html
  - Unreachable on the job site: https://immerruf.de/handwerk-unterwegs-nicht-erreichbar.html
- Auto repair shops / Kfz-Werkstatt: https://immerruf.de/branche-kfz-werkstatt.html
  - Pickup appointments by phone: https://immerruf.de/werkstatt-abholtermine-telefon.html
  - Phone always busy: https://immerruf.de/werkstatt-telefon-besetzt.html
- Restaurants & hospitality / Gastronomie: https://immerruf.de/branche-gastronomie.html
  - Peak-time calls: https://immerruf.de/gastronomie-stosszeiten-anrufe.html
  - Table reservations by phone: https://immerruf.de/gastronomie-tischreservierung-telefon.html
- Real estate agents / Immobilien: https://immerruf.de/branche-immobilien.html
  - Viewing appointments by phone: https://immerruf.de/immobilien-besichtigungstermine.html
  - Tenant inquiries by phone: https://immerruf.de/immobilien-mieteranfragen.html
- Hair & beauty salons / Friseur: https://immerruf.de/branche-friseur.html
  - Cancellations by phone: https://immerruf.de/friseur-terminabsagen.html
  - Phone rings, client in the chair: https://immerruf.de/friseur-kunde-am-stuhl-telefon.html
- Property management / Hausverwaltung: https://immerruf.de/branche-hausverwaltung.html
- Tax advisors / Steuerberater: https://immerruf.de/branche-steuerberater.html

## Links

- Home: https://immerruf.de/
- Pricing: https://immerruf.de/preise.html
- How it works: https://immerruf.de/#how
- Live demo: https://immerruf.de/#demo
- FAQ: https://immerruf.de/#faq
- HTML sitemap: https://immerruf.de/sitemap.html

## Optional

- Terms (AGB): https://immerruf.de/terms.html
- Full content for AI ingestion: https://immerruf.de/llms-full.txt
- XML sitemap index: https://immerruf.de/sitemap.xml

## Contact

- Email: hallo@immerruf.de
- Request a callback: https://immerruf.de/contact.html