Isler Partner Rechtsanwälte

What Isler Partner Rechtsanwälte does

Isler Partner Rechtsanwälte is a Swiss law firm founded in 1980, operating as a traditional partnership from two offices in Stäfa (Kronenstrasse 9) and Zürich (Holbeinstrasse 34). The firm delivers comprehensive legal advisory and litigation services across twelve practice areas: labor law, construction and real estate law, inheritance law, family law, commercial and corporate law, mediation, rental law, litigation and arbitration, debt collection and bankruptcy law, social security law, criminal law, and contract law. Service is rendered by three partner-attorneys — Peter Isler (joined as partner in 1982; SAV-certified specialist in inheritance law), Christof Wyss (joined as partner in 1996; SAV-certified mediator), and Sibylle Diewald (promoted to partner in 2018 after joining the firm in 2009) — supported by additional staff for a total headcount of five.

The firm serves three horizontal client segments: private individuals, companies, and public authorities (Behörden), with no industry specialization. Client acquisition is driven by professional reputation, referrals, and memberships in the Zürich Bar Association (Zürcher Anwaltsverband) and Swiss Bar Association (Schweizerischer Anwaltsverband) rather than active marketing. The firm operates in German, English, French, Italian, and Dutch, with a primary geographic focus on the Canton of Zürich and broader Switzerland.

Revenue is generated entirely through professional services billing (hourly or fixed fees) for legal consultation, contract drafting, representation, and litigation. The firm is privately held as a partnership among the three named partners, with no parent company, external investors, venture capital, or institutional ownership disclosed. No funding rounds, acquisitions, or corporate structural changes have occurred. The firm holds GDPR-aligned data protection practices and is registered in the Swiss Bar Register (Anwaltsregister).

Name

Isler Partner Rechtsanwälte

Legal name

Isler Partner Rechtsanwälte

Website

https://islerpartner.ch

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

1–10 employees

Short description

Isler Partner Rechtsanwälte is a Swiss law firm founded in 1980, operating from Stäfa and Zürich with three partner-attorneys delivering general-practice legal advisory and litigation services across twelve practice areas to private individuals, companies, and public authorities.

Ownership category

akta.pro rank

Headquarters

HQ city

Stäfa

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Infrastructure, Others

Revenue model

1. Legal Services: Professional legal services billed to private individuals, companies, and public authorities. Revenue generated through legal consultation, representation, contract drafting, and litigation services in various Swiss legal domains.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

Isler Partner Rechtsanwälte is a Swiss law firm that provides legal advisory and representation services to private individuals, companies, and public authorities across twelve practice areas, including labor law, real estate law, inheritance law, family law, commercial and corporate law, mediation, rental law, litigation and arbitration, debt collection and bankruptcy law, social security law, criminal law, and contract law. Services are delivered by three partners and support staff from offices in Stäfa and Zürich, with no proprietary technology or product offerings.

Product overview

Isler Partner Rechtsanwälte is a Swiss law firm founded in 1980, offering comprehensive legal services through three partner-attorneys: Sibylle Diewald, Peter Isler, and Christof Wyss. The firm provides legal counsel and representation across twelve specialized practice areas including labor law, construction and real estate law, inheritance law, family law, commercial and corporate law, mediation, rental law, litigation and arbitration, debt collection and bankruptcy law, social security law, criminal law, and contract law. Rather than a software product, the firm operates as a traditional legal services practice serving private individuals, companies, and public authorities in Swiss legal matters.

Differentiator

Problem solved

Functional benefit

Products and services

• Labor Law (Arbeitsrecht) Legal advisory and representation in Swiss labor law matters for private individuals and companies, covering employment disputes, contracts, and workforce compliance.
• Construction and Real Estate Law (Bau- und Immobilienrecht) Legal counsel on construction and real estate matters in Switzerland, including transactions, contract drafting, and disputes for private and commercial clients.
• Inheritance Law (Erbrecht) Legal advisory and representation in Swiss inheritance law, including estate planning, wills, probate, and estate disputes, led by an SAV-certified specialist in inheritance law.
• Family Law (Familienrecht) Legal advisory and representation in Swiss family law matters, including divorce, custody, matrimonial property, and family disputes for private individuals.
• Commercial and Corporate Law (Handels- und Gesellschaftsrecht) Legal counsel for Swiss businesses on commercial and corporate law matters, including corporate governance, contracts, and business succession.
• Mediation Mediation services for business law and other civil matters, delivered by an SAV-certified mediator for business law.
• Rental Law (Mietrecht) Legal advisory and representation in Swiss rental and tenancy law matters for landlords and tenants, including disputes before conciliation authorities and rental courts.
• Litigation and Arbitration (Prozessführung und Schiedsgerichtsbarkeit) Courtroom representation and arbitration services in Swiss civil and commercial disputes for private clients and businesses.
• Debt Collection and Bankruptcy Law (Schuldbetreibungs- und Konkursrecht) Legal services in Swiss debt collection and bankruptcy proceedings, including creditor representation and enforcement actions.
• Social Security Law (Sozialversicherungsrecht) Legal advisory and representation in Swiss social security law matters, including disputes with social insurance institutions.
• Criminal Law (Strafrecht) Legal defense and representation in Swiss criminal law proceedings for private individuals.
• Contract Law (Vertragsrecht) Drafting, review, and dispute resolution for Swiss contracts across civil and commercial matters.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators1 record

Recent moves4 records

Direct peers

• Meyerlustenberger Lachenal (MLL): Zürich-based Swiss law firm offering full-service legal counsel including real estate, family, inheritance, and commercial law, with a similar horizontal practice breadth and comparable domestic-only Zürich/Geneva footprint.
• Vischer AG: Mid-size full-service Swiss law firm headquartered in Zürich, comparable to Isler Partner in offering broad legal services across commercial, real estate, employment, family, and inheritance matters to private and corporate clients in the Zürich market.
• Staiger Anwaltskanzlei: Boutique Zürich-based law firm of similar size and full-service profile, serving private and corporate clients in commercial, employment, and private client matters, making it a close structural peer to Isler Partner.
• Bracher Spagnuolo Rechtsanwälte: Small to mid-size Zürich-based law firm with comparable generalist practice scope serving private and business clients, the most direct headcount and positioning match to Isler Partner's 3-partner structure.

Broad incumbents

• Pestalozzi Rechtsanwälte AG: Large Swiss law firm with offices in Zürich and Geneva; offers comparable commercial, real estate, employment, and dispute resolution practices, but at significantly larger scale than Isler Partner.
• Bär & Karrer AG: Top-tier Zürich-headquartered Swiss law firm providing corporate, real estate, employment, private client, and dispute resolution services; substantially larger but overlapping service offering in the same Zürich market.
• Wenger & Vieli AG: Zürich-based full-service Swiss law firm offering corporate, real estate, employment, and private client services, with deeper resources than Isler Partner but overlapping practice coverage in the Zürich market.
• Homburger AG: One of Switzerland's leading full-service commercial law firms in Zürich; significantly larger than Isler Partner but operates in the same regional market with overlapping corporate, real estate, inheritance, and litigation practices.
• Niederer Kraft Frey AG: Established Zürich-headquartered Swiss law firm with broad commercial, real estate, employment, and private client practices; a larger incumbent competing in the same Zürich market across several of Isler Partner's practice areas.
• Walder Wyss AG: Major Zürich-based full-service Swiss law firm offering corporate, real estate, employment, litigation, and private client services; operates as a much larger incumbent in the same Zürich canton as Isler Partner.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat2 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/isler-partner-rechtsanw%C3%A4lte

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Isler Partner Rechtsanwälte