What Siben & Siben does

Siben & Siben LLP is a family-owned, multi-generational law firm headquartered in Bay Shore, New York, that has served Long Island continuously since 1934. The firm is structured as a limited liability partnership under New York law and is independently owned by the Siben family, with no institutional or private equity ownership disclosed. Its core offering centers on personal injury representation, spanning car, truck, motorcycle, pedestrian, construction, slip and fall, brain injury, dog bite, nursing home abuse, medical malpractice, workers' compensation, and wrongful death matters, with the personal injury practice operating on a contingency fee basis. Beyond personal injury, the firm delivers 16+ additional practice areas including immigration, divorce and family law, criminal defense, real estate, bankruptcy, employment law, and trust and estate planning, providing cross-practice legal services to individuals and families across Suffolk and Nassau Counties.

The firm's technology footprint is intentionally minimal, consistent with a traditional professional services model: there is no proprietary software platform, no API, no mobile application, and no AI-augmented tooling described in available materials. Client acquisition runs through the firm website with SEO-optimized practice area and Featured Towns pages, free initial consultations, in-person office visits, and 24/7 phone intake specifically for personal injury cases, supplemented by television advertising. Revenue is generated through contingency fee arrangements in personal injury and varied fee structures across the remaining practice areas, and the firm reports lifetime client recoveries in excess of $1 billion. Operational scale is indicated by a 101–250 employee headcount, with no public revenue disclosure and no recent mergers, acquisitions, funding rounds, or new office locations in the source data.

Name

Siben & Siben

Legal name

Siben & Siben LLP

Website

https://sibensiben.com

Company type

Private

Founded year

1934

Operating status

Operating

Headcount range

101–250 employees

Short description

Siben & Siben LLP is a family-owned Long Island law firm founded in 1934, providing personal injury and 16+ general practice legal services to individuals across Suffolk and Nassau Counties from its Bay Shore office.

Ownership category

akta.pro rank

Headquarters

HQ city

Bay Shore

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Legal Services - Personal Injury: The firm provides legal representation in personal injury cases, typically handled on a contingency fee basis where legal fees are paid only if compensation is recovered. The firm also handles various other legal matters including real estate, family law, criminal defense, immigration, and bankruptcy services.
2. Legal Services - Other Practice Areas: Services provided across multiple legal practice areas including immigration, divorce, criminal defense, real estate, bankruptcy, trust and estates, employment law, and workers' compensation. Fee structures vary by practice area.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Siben & Siben LLP is a family-owned law firm founded in 1934 providing legal representation to individuals in Long Island across personal injury, criminal defense, divorce/family law, immigration, real estate, bankruptcy, trust and estates, employment law, and workers' compensation matters. The firm handles personal injury cases primarily on a contingency fee basis and offers 24/7 phone consultations and free initial consultations to convert prospects into clients. Its core offerings are organized by practice area with dedicated Long Island-specific landing pages for each legal service.

Product overview

Siben & Siben LLP is a family-owned personal injury law firm serving Long Island since 1934. The firm operates as a unified legal practice offering comprehensive legal services organized by practice area. Their core offering centers on personal injury law, with specialized services across motor vehicle accidents (car, truck, motorcycle, pedestrian), premises liability (slip and fall), medical malpractice, construction accidents, brain injuries, nursing home abuse, dog bites, wrongful death, and workers' compensation. Additionally, the firm provides complementary legal services including estate planning and trusts, employment law, immigration law, divorce/family law, criminal defense, real estate law, and bankruptcy law. The firm serves clients throughout Nassau and Suffolk Counties from their Bay Shore office location.

Differentiator

Problem solved

Functional benefit

Products and services

• Personal Injury Law Services Core legal representation for individuals injured due to negligence on Long Island, covering various accident and injury types including car, truck, motorcycle, pedestrian, slip and fall, construction, brain injury, dog bite, nursing home abuse, medical malpractice, wrongful death, and workers' compensation. Handled primarily on a contingency fee basis.
• Car Accident Lawyer Services Legal representation for car accident victims in Suffolk and Nassau Counties, pursuing compensation for injuries, medical expenses, and lost wages.
• Truck Accident Lawyer Services Legal representation for victims of commercial truck collisions on Long Island, pursuing claims against trucking companies and drivers.
• Motorcycle Accident Lawyer Services Legal representation for motorcycle riders injured in collisions, addressing the unique challenges of fault-based claims without No-Fault benefits.
• Pedestrian Accident Lawyer Services Legal representation for pedestrians injured by motor vehicles on Long Island, pursuing compensation for catastrophic injuries.
• Slip and Fall Lawyer Services Premises liability legal services for individuals injured in slip and fall accidents on commercial or residential properties on Long Island.
• Construction Accident Lawyer Services Legal representation for injured construction workers, pursuing claims under New York Labor Law including Section 240 Scaffold Law.
• Brain Injury Lawyer Services Legal representation for traumatic brain injury victims, pursuing compensation for medical treatment, rehabilitation, and long-term care.
• Dog Bite Lawyer Services Legal representation for dog bite victims on Long Island, pursuing strict liability claims for medical expenses and pain and suffering damages.
• Nursing Home Abuse Lawyer Services Legal representation for families of nursing home residents who have suffered abuse or neglect on Long Island, pursuing accountability against facilities.
• Medical Malpractice Lawyer Services Legal representation for victims of medical negligence on Long Island, including misdiagnosis, surgical errors, and medication mistakes.
• Wrongful Death Lawyer Services Legal representation for families pursuing wrongful death claims under New York law for fatal injuries caused by negligence.
• Workers' Compensation Lawyer Services Legal representation for injured workers on Long Island, pursuing workers' compensation benefits and third-party claims.
• Criminal Defense Lawyer Services Criminal defense representation in Suffolk and Nassau County courts for white-collar crimes, violent crimes, drug offenses, and DUI/DWI cases.
• Divorce and Family Law Services Legal representation in divorce proceedings, including child custody, asset division, and spousal support matters.
• Immigration Lawyer Services Legal services for immigration matters including citizenship, green cards, asylum, work visas, and deportation defense.
• Real Estate Attorney Services Legal services for real estate transactions on Long Island, including residential and commercial purchases, title searches, and litigation.
• Trust and Estates Lawyer Services Estate planning and administration services including wills, trusts, probate, and asset protection strategies.
• Bankruptcy Lawyer Services Legal services for bankruptcy filings, including Chapter 7 and Chapter 13 proceedings for debt relief.
• Employment Lawyer Services Legal representation for employees facing wrongful termination, discrimination, harassment, and wage disputes.

Quantifiable outcome

• Over $1 billion recovered for clients
• +1 more outcomes

Segments10 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Weitz & Luxenberg: Long-established New York personal injury and mass tort firm (founded 1986) with high-volume TV marketing and significant verdicts. Comparable in scale, target clientele, and multi-practice personal injury model.
• Cellino Law: Personal injury firm that emerged from the Cellino & Barnes split, serving New York State including Long Island. Directly comparable in practice mix, target client (accident victims), and contingency-fee model.
• Block O'Toole & Murphy: New York personal injury firm known for high-value verdicts in construction, motor vehicle, and premises liability cases. Comparable to Siben & Siben in core PI practice areas, contingency model, and notable settlement positioning.
• The Barnes Firm: Major New York personal injury law firm (formerly Cellino & Barnes) that advertises heavily in the Long Island and upstate NY markets. Direct competitor for PI cases across car accidents, construction accidents, and wrongful death.
• Rosenbaum & Rosenbaum, P.C. New York City-based personal injury and general practice law firm with overlapping practice areas including construction accidents, car accidents, and premises liability. Comparable contingency-fee model and Long Island/Manhattan client base.
• Raphaelson & Levine Law Firm: New York personal injury and accident law firm running heavy TV advertising in the NY metro and Long Island markets. Comparable in target clientele (accident victims), practice areas, and contingency-fee economics.
• Mirman, Markovits & Landau, P.C. New York-based personal injury firm handling car accidents, construction accidents, and wrongful death cases. Comparable in practice mix, contingency-fee model, and regional focus on the NY metro area including Long Island.

Broad incumbents

• Jacoby & Meyers: National consumer law firm with offices in New York, operating a multi-practice model (PI, family, criminal) similar to Siben & Siben's diversified Long Island practice. Comparable business model and contingency-fee approach.
• Morgan & Morgan: Largest personal injury law firm in the United States, running aggressive TV/digital marketing across New York. Overlap with Siben & Siben in core PI practice areas; broader scale and national brand present competitive pressure on Long Island.

Regional players

• Keogh Crisanti, PLLC: Long Island-based personal injury firm serving Suffolk and Nassau counties. Direct geographic peer and competitor in the same hyperlocal market as Siben & Siben, with overlapping car accident and premises liability work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/sibenandsiben
• Facebookfacebook.com/longislandinjurylawyers
• LinkedInlinkedin.com/company/siben-and-siben-llp

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Siben & Siben