Best Private Investigators in Boston

Why These Private Investigators?

Our goal is to connect people with the best local experts. We scored Boston Private Investigators on more than 25 variables across five categories, and analyzed the results to give you a hand-picked list of the best.

Reviewed Curated Top Picks 158 100 14

Our Selection Criteria:

  • 1. Availability

    Consistently approachable and responsive, so customers never feel ignored.

  • 2. Qualifications

    Building customer confidence with licensing, accreditations, and awards.

  • 3. Reputation

    A history of delighted customers and outstanding service.

  • 4. Experience

    Masters of their craft, based on years of practical experience and education.

  • 5. Professionalism

    Providing service with honesty, reliability, and respect.

Read more about our selection process

American Legal Investigative Services

American Legal Investigative Services was founded in 1985 in Boston as a security and investigation consulting firm. The company features a team of investigators, forensic accountants, cyber security experts, and physical security professionals to help clients mitigate risk during business transactions, internal fraud investigations, and during hiring processes. The company is accredited by the BBB and is equipped to handle background, white-collar, and criminal defense investigations as well as surveillance and litigation support. Clients include corporations, attorneys, and private equity firms.

Boston, MA 02114


Bob Long Investigations Group LLC

Bob Long Investigations Group LLC is a Boston firm providing investigative and security consulting services to high net worth clients in the legal, corporate, and financial communities. Founder Bob Long is certified in fraud investigation and homeland security and holds multiple degrees in criminal justice. He is also a member of the Ancient and Honorable Artillery Company of Massachusetts. The company's menu of services includes asset searches, business intelligence, character due diligence, computer forensics, corporate investigations, missing person cases, and more.

Boston, MA 02116


DiNatale Detective Agency

DiNatale Detective Agency was founded in 1968 in West Roxbury and is currently one of the oldest privately-owned agencies in Massachusetts. The company is also fully licensed and was founded by former Boston Police detective and chief investigator Phil DiNatale, who was responsible for cracking the famous Boston Strangler case. The agency adheres to the principles of integrity, effectiveness, and professionalism. Phil's sons John and Richard currently operate the company and bring 75 years of combined experience to their work. Investigative services include civil and criminal cases, insurance fraud, corporate investigations, asset searches, and surveillance.

West Roxbury, MA 02132


Greystones Investigation

Greystones Investigation is a licensed, bonded, and insured Dorchester private investigation agency serving clients in the legal, corporate, and private sectors. The company has over 15 years of investigative experience and features a team of "affordable, confidential, and result-oriented" investigators. The agency was founded in 2005 by Harvard College graduate Sarah Alcorn, who frequently delivers lectures on investigation-related matters and offers a seminar for law students called Your Investigative Toolbox. Services offered include criminal and civil investigations, surveillance, witness interviews, and background checks. Free estimates can be requested by contacting the company directly.

Dorchester, MA 02122


Pinnacle Investigation

Pinnacle Investigation is a licensed investigative company in Tewksbury operated by an expert researcher and surveillance specialist. Investigations can be performed for cases involving divorce, child custody, asset location, insurance fraud, background checks, and business surveillance. The company's team promises to "stop at nothing" to ensure that clients receive the answers they seek to a range of personal and corporate matters.

Tewksbury, MA 01876


Rockwell Investigations

Rockwell Investigations is a full-service private investigation company in Wakefield. The firm is licensed, bonded, and insured and has over 20 years of experience serving attorneys, insurance companies, corporations, and the general public. Some of the services offered include marital investigations, loss prevention, lost or hidden asset location, and insurance fraud investigations. The firm is licensed in bail enforcement and constable services in Massachusetts.

Wakefield, MA 01880


United Investigative Services

United Investigative Services is a licensed, bonded, and insured full-service investigation company in Cambridge. The company was founded in 1995 by Conrad Temple, who has over 20 years of experience in the field and has successfully completed thousands of cases for major insurance companies in Rhode Island, Massachusetts, and New Hampshire. Clients include criminal victims, small and large businesses, insurance companies, law firms, and law enforcement agencies. Services are available for divorce cases, missing persons, surveillance, asset investigations, GPS tracking, and background checks, among other areas.

Cambridge, MA 02238


Wrong city? Here are some nearby places: