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AI Visibility Index · September 2026

Accountants in Bern that AI assistants recommend

We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for accountants in Bern, three times each, in German, and counted who they named. These are the businesses named in two or more of the 36 answers.

Check whether AI names youSee the ranking

Names are printed as the assistants wrote them. We have not checked that any of them is good, open, or real.

Accountants · Bern
75%of answers named BDO AG
Answers
36
Businesses named
37
Named only once
18
Named by 2+ assistants
10 of 19
Named again on a rerun
42%

Edition September 2026. Download the data

Asked for accountants in Bern, ChatGPT, Claude and Gemini most often named BDO AG (75% of answers), T+R AG (39%) and ENGEL COPERA AG (33%). Across 36 answers they named 37 different businesses, 18 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.

Accountants in Bern named by AI assistants, September 2026
#BusinessAI Recommendation RateChatGPTClaudeGeminiQuestionsAvg. position
1BDO AGAlso written BDO AG Bern, BDO AG, Bern, BDO AG – Bern, BDO AG – Treuhand BernIs this your business?75%95%: 59 to 86%75%50%100%4 of 41.6
2T+R AGAlso written T + R AG, T&R AG, T&R AG, Bern, T&R AG, Treuhand und Revision, Bern, T+R AG, Gümligen/BernIs this your business?39%95%: 25 to 55%33%83%0%4 of 42.8
3ENGEL COPERA AGAlso written ENGEL COPERA AG, BernIs this your business?33%95%: 20 to 50%50%50%0%4 of 43.1
4Gfeller + Partner AGAlso written Gfeller + Partner AG, BernIs this your business?33%95%: 20 to 50%17%58%25%4 of 43.4
5OBT AGAlso written OBT AG Bern, OBT AG, Bern, OBT AG – BernIs this your business?28%95%: 16 to 44%33%17%33%3 of 42.8
6Von Graffenried Treuhand AGAlso written Von Graffenried AG Treuhand, von Graffenried Treuhand AG, Von Graffenried AG Treuhand, BernIs this your business?25%95%: 14 to 41%25%50%0%4 of 42
7Treuhand- und Revisionsgesellschaft Mattig-Suter und PartnerAlso written Treuhand- und Revisionsgesellschaft Mattig-Suter und Partner, BernIs this your business?25%95%: 14 to 41%0%0%75%3 of 42.6
8Wicki Treuhand AGAlso written Wicki Treuhand AG, BernIs this your business?22%95%: 12 to 38%0%0%67%4 of 43.3
9Balmer-Etienne AGAlso written Balmer-Etienne AG, BernIs this your business?14%95%: 6 to 29%25%17%0%2 of 42.2
10Dr. Röthlisberger AGIs this your business?14%95%: 6 to 29%8%33%0%4 of 43
11Treuhand Bern AGIs this your business?14%95%: 6 to 29%0%0%42%2 of 43.2
12Fiducia Treuhand AG BernIs this your business?14%95%: 6 to 29%0%0%42%4 of 44.6
13PwC SchweizIs this your business?11%95%: 4 to 25%0%0%33%2 of 42
14Gewerbe-Treuhand AG, BernAlso written Gewerbe-Treuhand AG Bern, Gewerbetreuhand AG BernIs this your business?11%95%: 4 to 25%17%17%0%4 of 42.3
15Buchhaltungsbüro Bern AGIs this your business?6%95%: 2 to 18%17%0%0%1 of 41
16Dialog Treuhand AGAlso written Dialog Treuhand AG, BernIs this your business?6%95%: 2 to 18%8%8%0%2 of 43.5
17Wenger PlattnerIs this your business?6%95%: 2 to 18%0%0%17%2 of 44
18Gfeller Treuhand AGIs this your business?6%95%: 2 to 18%0%0%17%1 of 44.5
19Zimmermann Treuhand AGAlso written Zimmermann Treuhand AG, BernIs this your business?6%95%: 2 to 18%0%0%17%1 of 44.5

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. 18 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.

Check your businessNamed above? Add the badgeWhat the audit does

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.

#ChatGPTClaudeGemini
1BDO AG75%T+R AG83%BDO AG100%
2ENGEL COPERA AG50%Gfeller + Partner AG58%Treuhand- und Revisionsgesellschaft Mattig-Suter und Partner75%
3T+R AG33%BDO AG50%Wicki Treuhand AG67%
4OBT AG33%ENGEL COPERA AG50%Treuhand Bern AG42%
5Von Graffenried Treuhand AG25%Von Graffenried Treuhand AG50%Fiducia Treuhand AG Bern42%

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.

Correct or remove a listing
Named by AI assistants: Accountants in Bern, AIGROW AI Visibility Index, September 2026
<a href="https://aigrow.gg/index/accountants/bern"><img src="https://aigrow.gg/badges/index/2026-09/accountants/bern.svg" width="312" height="100" alt="Named by AI assistants: Accountants in Bern, 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.

  1. 1Wer ist der beste Treuhänder in Bern?Who is the best accountant in Bern?
  2. 2Ich habe ein kleines Unternehmen in Bern. Welches Treuhandbüro empfiehlst du?I run a small business in Bern. Which accounting firm would you recommend?
  3. 3Ich brauche in Bern einen Treuhänder für meine Steuererklärung. Wen würdest du empfehlen?I need someone to do my taxes in Bern. Which CPA should I use?
  4. 4Welches Buchhaltungsbüro in Bern würdest du einem kleinen Unternehmen empfehlen?Which bookkeeping service in Bern would you recommend for a small company?

How to read this page

The full method
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.

See every site for this category
wikipedia.org
Read in 86% of the answers
bdo.ch
Read in 57% of the answers
localsearch.ch
Read in 57% of the answers

Elsewhere in the Index

Accountants elsewhere
BaselGenevaLausanneLuganoZurichBerlin
Also in Bern
DentistsLawyersPlumbersGymsReal estate agenciesRestaurants

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.

Run the free AI scanRead the method

Edition September 2026 · published by Guglielmo Paesano, founder of AIGROW · data under CC BY 4.0