Real estate agencies in Basel that AI assistants recommend
We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for real estate agencies in Basel, 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
- 49
- Named only once
- 29
- Named by 2+ assistants
- 8 of 20
- Named again on a rerun
- 47%
Edition September 2026. Download the data
Asked for real estate agencies in Basel, ChatGPT, Claude and Gemini most often named Wincasa (64% of answers), Naef Immobilien (44%) and Livit AG (39%). Across 36 answers they named 49 different businesses, 29 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 | WincasaAlso written Wincasa AGIs this your business? | 95%: 48 to 78% | 17% | 83% | 92% | 4 of 4 | 2.5 |
| 2 | Naef ImmobilienAlso written Naef Immobilien Basel AG, Naef Immobilien BaselIs this your business? | 95%: 30 to 60% | 0% | 33% | 100% | 4 of 4 | 1.9 |
| 3 | Livit AGIs this your business? | 95%: 25 to 55% | 17% | 100% | 0% | 4 of 4 | 2.4 |
| 4 | Privera AGIs this your business? | 95%: 25 to 55% | 0% | 25% | 92% | 4 of 4 | 4.3 |
| 5 | Baloise ImmobilienAlso written Baloise Immobilien AGIs this your business? | 95%: 23 to 52% | 0% | 8% | 100% | 4 of 4 | 2.7 |
| 6 | Engel & Völkers BaselIs this your business? | 95%: 23 to 52% | 42% | 58% | 8% | 3 of 4 | 3.2 |
| 7 | GRIBIAlso written Gribi Vermarktung AG, Gribi Bewirtschaftung AG, GRIBI Bewirtschaftung AG, Gribi ImmobilienIs this your business? | 95%: 12 to 38% | 67% | 0% | 0% | 4 of 4 | 1.4 |
| 8 | Von GraffenriedAlso written Von Graffenried AG, Von Graffenried AG Immobilien, Von Graffenried AG LiegenschaftenIs this your business? | 95%: 12 to 38% | 0% | 67% | 0% | 3 of 4 | 3.6 |
| 9 | UBS ImmobilienAlso written UBS Immobilien Basel, UBS Real Estate, UBS Real Estate BaselIs this your business? | 95%: 8 to 32% | 0% | 50% | 0% | 3 of 4 | 2.8 |
| 10 | Apleona Real EstateAlso written Apleona Real Estate AGIs this your business? | 95%: 8 to 32% | 0% | 0% | 50% | 4 of 4 | 5.5 |
| 11 | RE/MAXAlso written RE/MAX Immobilien Basel, RE/MAX Switzerland, Remax BaselIs this your business? | 95%: 4 to 25% | 25% | 8% | 0% | 2 of 4 | 4.5 |
| 12 | Walde ImmobilienAlso written Walde Immobilien AGIs this your business? | 95%: 3 to 22% | 17% | 0% | 8% | 3 of 4 | 2 |
| 13 | Burckhardt Immobilien AGIs this your business? | 95%: 3 to 22% | 25% | 0% | 0% | 2 of 4 | 2.3 |
| 14 | PropertiAlso written Properti AGIs this your business? | 95%: 3 to 22% | 0% | 0% | 25% | 1 of 4 | 3 |
| 15 | Spinnler Immobilien AGIs this your business? | 95%: 3 to 22% | 0% | 0% | 25% | 3 of 4 | 4.3 |
| 16 | Fischer ImmobilienAlso written Fischer Immobilien AG, Fischer Immobilien AG Basel, Fischer Immobilien BaselIs this your business? | 95%: 3 to 22% | 0% | 25% | 0% | 2 of 4 | 5.7 |
| 17 | Domicil ImmobilienAlso written Domicil Immobilien AGIs this your business? | 95%: 2 to 18% | 17% | 0% | 0% | 1 of 4 | 1 |
| 18 | Wüest PartnerIs this your business? | 95%: 2 to 18% | 0% | 17% | 0% | 1 of 4 | 3.5 |
| 19 | BARNES BaselIs this your business? | 95%: 2 to 18% | 17% | 0% | 0% | 2 of 4 | 4 |
| 20 | Spitex ImmobilienIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 2 of 4 | 5 |
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. 29 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 | GRIBI67% | Livit AG100% | Naef Immobilien100% |
| 2 | Engel & Völkers Basel42% | Wincasa83% | Baloise Immobilien100% |
| 3 | RE/MAX25% | Von Graffenried67% | Wincasa92% |
| 4 | Burckhardt Immobilien AG25% | Engel & Völkers Basel58% | Privera AG92% |
| 5 | Wincasa17% | UBS Immobilien50% | Apleona Real Estate50% |
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/basel"><img src="https://aigrow.gg/badges/index/2026-09/real-estate-agencies/basel.svg" width="312" height="100" alt="Named by AI assistants: Real estate agencies in Basel, 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.
- 1Welche ist die beste Immobilienfirma in Basel?Who is the best real estate agency in Basel?
- 2Ich möchte meine Wohnung in Basel verkaufen. Welche Immobilienfirma empfiehlst du?I want to sell my home in Basel. Which real estate agency would you recommend?
- 3Ich suche eine Eigentumswohnung in Basel. An welche Immobilienfirmen sollte ich mich wenden?I'm looking for an apartment to buy in Basel. Which real estate agents should I contact?
- 4Welche Immobilienfirma in Basel würdest du für die Vermietung einer Wohnung empfehlen?Which real estate agency in Basel 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.
Where the assistants look
The sites read most often, with web search on, before the assistants answer about this category in Switzerland. From the AI Source Map: 7 answers.
- wikipedia.org
- Read in 86% of the answers
- realadvisor.ch
- Read in 71% of the answers
- reddit.com
- Read in 57% of the answers
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