Real estate agencies in Vienna that AI assistants recommend
We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for real estate agencies in Vienna, three times each, in German, and counted who they named. These are the businesses named in two or more of the 36 answers.
Names are printed as the assistants wrote them. We have not checked that any of them is good, open, or real.
- Answers
- 36
- Businesses named
- 20
- Named only once
- 7
- Named by 2+ assistants
- 8 of 13
- Named again on a rerun
- 66%
Edition September 2026. Download the data
Asked for real estate agencies in Vienna, ChatGPT, Claude and Gemini most often named Otto Immobilien (89% of answers), EHL Immobilien (83%) and Raiffeisen Immobilien (50%). Across 36 answers they named 20 different businesses, 7 of them only once. Each of four buyer questions was asked three times, in German, in September 2026.
The ranking
The AI Recommendation Rate is the fraction of the 36 answers that named a business. The range under it is a 95% confidence interval: where two ranges overlap, the gap between those businesses could be chance.
| # | Business | AI Recommendation Rate | ChatGPT | Claude | Gemini | Questions | Avg. position |
|---|---|---|---|---|---|---|---|
| 1 | Otto ImmobilienAlso written OTTO Immobilien, Otto Immobilien GmbH, OTTO Immobilien GmbHIs this your business? | 95%: 75 to 96% | 100% | 75% | 92% | 4 of 4 | 2.1 |
| 2 | EHL ImmobilienAlso written EHL Immobilien GmbHIs this your business? | 95%: 68 to 92% | 100% | 100% | 50% | 4 of 4 | 1.3 |
| 3 | Raiffeisen ImmobilienAlso written Raiffeisen Immobilien Wien, Raiffeisen Immobilien Vermittlung GmbHIs this your business? | 95%: 35 to 66% | 0% | 92% | 58% | 4 of 4 | 4 |
| 4 | RE/MAXAlso written RE/MAX Wien, RE/MAX First Vienna, RE/MAX Austria, RE/MAX Donau-City-Immobilien, REMAX AustriaIs this your business? | 95%: 30 to 60% | 8% | 33% | 92% | 4 of 4 | 3 |
| 5 | s REALAlso written s REAL Immobilien, s Real Immobilien, s RealIs this your business? | 95%: 23 to 52% | 17% | 92% | 0% | 4 of 4 | 4.3 |
| 6 | Rustler ImmobilienAlso written Rustler Immobilienentwicklung GmbH, Rustler Immobilien GmbHIs this your business? | 95%: 18 to 47% | 25% | 8% | 58% | 4 of 4 | 4.2 |
| 7 | 3SI ImmogroupAlso written 3SI Immobilien, 3SI MaklerIs this your business? | 95%: 16 to 44% | 0% | 83% | 0% | 4 of 4 | 4 |
| 8 | IMMOcontractAlso written IMMOcontract Immobilien Vermittlung GmbHIs this your business? | 95%: 16 to 44% | 8% | 0% | 75% | 4 of 4 | 4.3 |
| 9 | ERA ImmobilienAlso written ERA Immobilien Wien, ERA Real Estate, ERA Immobilien Austria, ERA Real Estate WienIs this your business? | 95%: 12 to 38% | 0% | 0% | 67% | 4 of 4 | 3 |
| 10 | ÖRAGAlso written ÖRAG Immobilien, ÖRAG Immobilien Vermittlung GmbHIs this your business? | 95%: 10 to 35% | 0% | 58% | 0% | 3 of 4 | 3 |
| 11 | Engel & Völkers WienIs this your business? | 95%: 6 to 29% | 33% | 0% | 8% | 3 of 4 | 3.4 |
| 12 | BUWOGAlso written BUWOG Group GmbH, Buwog ImmobilienvermittlungIs this your business? | 95%: 4 to 25% | 33% | 0% | 0% | 2 of 4 | 3 |
| 13 | Wohnnet ImmobilienIs this your business? | 95%: 2 to 18% | 0% | 17% | 0% | 2 of 4 | 6 |
Each assistant column is the share of that assistant's own answers. Questions counts how many of the four produced the name at least once; position is where it came in the answer's list, 1 being first. 7 more names came up in a single answer and are counted above but not listed.
Is this your business?
See what the assistants say about your business today. The free checker asks ChatGPT, Claude, Gemini and Grok two of the Index questions for this category, with the category and the place already filled in, and shows every answer word for word. About 30 seconds, no sign-up.
What each assistant said
The same questions, the same number of times, and often different names. Each column is one assistant's top five from the ranking above, with the share of its own answers that named them.
| # | ChatGPT | Claude | Gemini |
|---|---|---|---|
| 1 | Otto Immobilien100% | EHL Immobilien100% | Otto Immobilien92% |
| 2 | EHL Immobilien100% | Raiffeisen Immobilien92% | RE/MAX92% |
| 3 | Engel & Völkers Wien33% | s REAL92% | IMMOcontract75% |
| 4 | BUWOG33% | 3SI Immogroup83% | ERA Immobilien67% |
| 5 | Rustler Immobilien25% | Otto Immobilien75% | Raiffeisen Immobilien58% |
Named here? Put it on your site
Every business in the ranking was named in two or more answers. The badge says that and nothing more: no position, because the ranges above do not support one. It links back to this page, so anyone can check.
<a href="https://aigrow.gg/index/real-estate-agencies/vienna"><img src="https://aigrow.gg/badges/index/2026-09/real-estate-agencies/vienna.svg" width="312" height="100" alt="Named by AI assistants: Real estate agencies in Vienna, AIGROW AI Visibility Index, September 2026"></a>The questions
Asked word for word, three times each, to every assistant, in German. The English under each is our translation. The prompt is the one the free scan uses. No web search, no location and no chat history, so every answer starts from the same place.
- 1Welcher ist der beste Immobilienmakler in Wien?Who is the best real estate agency in Vienna?
- 2Ich möchte meine Wohnung in Wien verkaufen. Welchen Makler empfiehlst du?I want to sell my home in Vienna. Which real estate agency would you recommend?
- 3Ich suche eine Eigentumswohnung in Wien. An welche Makler sollte ich mich wenden?I'm looking for an apartment to buy in Vienna. Which real estate agents should I contact?
- 4Welches Maklerbüro in Wien würdest du für die Vermietung einer Wohnung empfehlen?Which real estate agency in Vienna would you recommend for renting out an apartment?
How to read this page
- What it measures
- Which names these models produce when asked cold, from what they learned in training. It is not a review, a rating or our recommendation, and a business missing here may simply be one the models were never shown.
- Why the ranges matter
- 36 answers is a sample. Asked again next month, most shares will move by a few points; the ranges say how far they could move by chance alone.
- One business, several spellings
- Branches, legal suffixes and spellings of one business are merged, and the other spellings are printed under its name. Names that might be two businesses are kept apart.
- A name is wrong
- If a business here is closed, misnamed or yours and you want it removed, tell us. We correct or remove it when the page is next published.
Is your business on this list?
The free scan asks the same assistants the questions your customers ask, scores whether they name you, and lists who they name instead.
Edition September 2026 · published by Guglielmo Paesano, founder of AIGROW · data under CC BY 4.0