When suspicions creep in or you simply need verified facts, hiring a professional can make all the difference. From matrimonial surveillance to corporate due diligence, a private investigator in Singapore can help uncover information legally and discreetly, giving you clarity in situations where guesswork only makes things worse.
Singapore has no shortage of licensed agencies, but not all investigators offer the same level of professionalism, transparency, or results. To help you narrow things down, we’ve rounded up some of the most reputable firms in the country, each known for reliability, ethical practices, and strong investigative track records.
Let’s take a closer look.
Note: This list is strictly not in order.
1. Asia Top Investigation
Asia Top Investigation has built a reputation for dependable and discreet investigative work across both personal and corporate cases. Licensed by the Singapore Police Force, the firm places strong emphasis on compliance, confidentiality, and evidence that stands up to scrutiny. Their services cover matrimonial investigations, digital forensics, background checks, and corporate enquiries, making them a reliable one-stop solution for complex situations.
Founder Vincent Tan, a veteran investigator with decades of field experience, has handled thousands of cases ranging from routine background checks to high-profile matrimonial matters. Clients often turn to the agency for its calm, methodical approach and clear communication throughout each stage of an investigation. Recognition such as the Singapore SME500 Award further highlights its consistent service standards.
Prices:
They don’t post their service fee publicly. Kindly visit or contact them directly for inquiries.
Highlights:
- Licensed by Singapore Police Force
- Strong expertise in matrimonial and corporate cases
- Founder with decades of investigative experience
- Award-winning SME500 recipient
Customer Reviews:
Li Fei
I m glad that I came upon Asia Top Investigation through Google Search when I am in desperate need of a PI.Mr Vincent Tan has provided me an exceptional, professional, responsive and discreet service. I was nervous and emotional, but he handled my situation with empathy by providing good advice Thanks to the efficient of Vincent and his team, I was update the findings throughout the investigation.if you need a service that come with kindness, professionalism and above all making you feel safe and better.
Di Cheng
Navigating the discovery of a cheating spouse is incredibly difficult, but Vincent and his team made the process so much more bearable. His speed in catching my partner was impressive, but it was Vincent’s extraordinary empathy that I will always remember. He didn’t just do his job; he genuinely considered my emotional reactions and dealt with everything so sensitively and with immense compassion. I am so grateful for his exceptional support. Highly recommend!
Grace “Grace” L
Vincent is a very good advisor, he also very knowledgeable about all the topics. He is a very understanding person, he knows my situation and provided me a lot of helpful advices. His team is very awesome! All the evidences they took is very useful and they are very Ru professional. My husband is a very alert, smart, careful person, but Vincent and his team made it! They help me to rebuild my confidence to fight back against this. This is a hard and difficult battle to me, especially I have financial constraints and have 2 very young kids. Vincent is really a kind person, very honest, very experienced and very professional. Hope my case will closed soon and very successful.
Website: https://asiatopinvestigation.com/
Contact: 8820 0007
Location: 31 Rochester Dr, Suite 1, Level 24, Singapore 138637
Opening Hours: Open 24 hours
2. Ace Private Investigations
Ace Private Investigations is a long-standing agency licensed by the Police Licensing & Regulatory Department, with nearly two decades of investigative experience. The team handles both personal and commercial assignments, focusing on legally compliant evidence collection that clients can rely on for court proceedings or internal decision-making.
On the corporate side, Ace supports businesses with employee screening, fraud detection, and workplace misconduct enquiries. Individuals seeking clarity in family matters can also engage the firm for discreet infidelity investigations or custody-related cases. Their balanced approach, such as combining empathy with professionalism, makes them a practical choice if you’re searching for a top private investigator in Singapore who understands both legal and emotional complexities.
Prices:
They don’t post their service fee publicly. Kindly visit or contact them directly for inquiries.
Highlights:
- Licensed by PLRD
- Strong background in corporate and matrimonial cases
- Court-admissible evidence collection
- Nearly 20 years of investigative experience
Customer Reviews:
ying xuan
I needed concrete proof for a court case and was referred to Ace. Navin handled my investigation—his attention to detail was meticulous. He provided timestamped evidence and a clear, factual report that was accepted without question by my lawyer. Their professionalism gave me immense peace of mind during a difficult litigation process.
ballu jhateri
I appreciated their honesty. They were upfront about expectations and never pushed services I didn’t need.
Tiffany Goh
Communication was smooth and professional. They knew exactly what to do and guided me step by step.
Website: https://www.acepi.com.sg/
Contact: 6491 1005
Location: 390 Victoria St, #03-17 Golden Landmark Shopping Complex, Singapore 188061
Opening Hours: Open 24 hours
3. DETECTIVE DON PI
Detective Don PI is one of Singapore’s more established agencies, run by former police officers who bring practical law-enforcement experience to private investigations. Their membership in global organisations such as the Council of International Investigators and the World Association of Professional Investigators gives them access to overseas networks for cross-border assignments.
Beyond standard matrimonial and corporate enquiries, Detective Don PI also handles specialised work like undercover operations and mystery shopping. These services can help uncover misconduct or evaluate customer service standards without tipping off the subject. Clients value their transparent pricing, global reach, and calm handling of delicate situations.
Prices:
They don’t post their service fee publicly. Kindly visit or contact them directly for inquiries.
Highlights:
- Managed by former police officers
- Worldwide investigative network
- Offers undercover and mystery shopping services
- Transparent pricing structure
Customer Reviews:
Gerald
One of the best guys out there, gave me more than I asked for.
Jo J
They made a great first impression—extremely professional, quick to respond, and very courteous in their approach.
Andy Toh
Life savior! Best private investigators in Singapore. Thanks detective don pi and team for the job well done
Website: http://detectivedonpi.com/
Contact: 8810 0981
Location: 111 MacPherson Rd, Singapore 348502
Opening Hours: Open 24 hours
4. Privateye Investigation & Consultancy
Privateye Investigation & Consultancy stands out for its client-centred philosophy. The agency treats every case as unique, taking time to understand the personal or corporate context before planning an investigative strategy. With backgrounds in the military and police force, their investigators combine tactical planning with behavioural analysis to produce reliable findings.
Privateye’s core services include matrimonial investigations, commercial enquiries, work injury claims, and general investigative work. For clients unsure of what they’re facing, the agency also offers short-term surveillance assignments to uncover initial facts. Their familiarity with Singapore’s legal requirements ensures evidence is gathered responsibly and within proper boundaries.
Prices:
They don’t post their service fee publicly. Kindly visit or contact them directly for inquiries.
Highlights:
- Investigators with military and police experience
- Strong focus on personalised case planning
- Covers matrimonial, commercial, and WICA cases
- Familiar with Singapore court evidence standards
Customer Reviews:
Jenny Koh
I want to thank Jeffrey and his team. He has extensive experience and expertise, handles cases responsibly, and keeps me informed throughout the process. I thank your team, and I recommend this company to anyone who needs their services.
Shahirah Singlaire
Jeffrey is very professional. Walked us through everything. During the service, he is prompt in updating. He also puts in suggestions and listens to our concerns and enquiries.
Ivy Liew
I would like to thank Jeffrey and his team. Efficient and excellent service! Great job ?
Website: https://www.privateye.com.sg/
Contact: 9046 5299
Location: Paya Lebar Square, Office Lobby 2, #12-41, 60 Paya Lebar Rd, Singapore 409051
Opening Hours: Open 24 hours
5. KOKUSAI
Founded in 1984, Kokusai Pte Ltd is one of Singapore’s more seasoned investigative firms, built by former public officers with backgrounds in police and armed forces training. Their early experience in security management, crowd control, and protective services continues to shape the agency’s disciplined and methodical investigative style today.
Kokusai is especially well known for matrimonial cases, helping clients uncover the truth behind suspected infidelity, custody disputes, or domestic conflicts. However, their work isn’t limited to personal matters, they also assist with commercial investigations, missing persons cases, and general surveillance assignments. Clients appreciate being able to speak directly with the investigator handling their case, ensuring clarity and trust throughout the process. With decades of on-the-ground experience, the firm focuses on delivering factual, unbiased findings that help clients make confident decisions.
Prices:
They don’t post their service fee publicly. Kindly visit or contact them directly for inquiries.
Highlights:
- Founded in 1984 with ex-police and military leadership
- Strong expertise in matrimonial investigations
- Direct communication with assigned investigator
- Offers security and bodyguard services
Customer Reviews:
Mira Ho
Case 2407037MQ: A reputable, dedicated, safe, and trustworthy place.
Chiu Ssi Poh
Full security. Really a professional job in tracking. 100% trust. With peace.
GAYATRI SUTAR
Excellent service! Mr. Magnum and their team expertise and ethical approach were evident from the start, delivering reliable and timely results.
Website: https://catchcheatingspouse.sg/
Contact: 8182 1221
Location: 111 N Bridge Rd, #24-05 Peninsula Plaza, Singapore 179098
Opening Hours: Open 24 hours
6. Adrian & McKenzie Investigators
Adrian & McKenzie Investigators LLP is a licensed agency regulated by the Singapore Police Force, with investigators individually accredited by the Police Licensing & Regulatory Department. Many team members are former SAF senior officers or experienced operatives from policing backgrounds, bringing a disciplined and systematic approach to each assignment.
Their investigations span matrimonial disputes, corporate concerns, and civil or criminal matters. Clients receive regular updates, helping them stay informed about progress while maintaining transparency about costs and timelines. Beyond gathering evidence, the firm takes a thoughtful stance towards sensitive family matters, sometimes recommending reconciliation programmes when appropriate. Consultations are obligation-free, and the agency is upfront about fees, making them a reassuring option for clients seeking clear answers without hidden surprises.
Prices:
Investigation Fees: $500++
Highlights:
- Licensed by Singapore Police Force and PLRD
- Team includes ex-SAF officers and police-trained investigators
- Regular progress updates for clients
- Transparent, no-hidden-fee consultations
Customer Reviews:
tim tim
Very professional and gave good and honest advice that helped me to save some money
Benny Tai
Contacted Adrian & McKenzie for some cross border due diligence and surveillance. Great job, thanks.
Szana Magyar
I contacted Adrian & McKenzie as I had some suspicions about my partner. We discussed some details and they proposed a surveillance plan which was little complex. It turned out well and got the evidence I wanted. Job well done. Would recommend.
Website: http://am-investigators.com/
Contact: 9489 7754
Location: 61 Ubi Ave 1, #03-14 UB Point, Singapore 408941
Opening Hours: Open 24 hours
7. Eyes Private Investigators
Eyes Private Investigators Pte Ltd is run by former Singapore Police Force officers and offers investigative services for individuals, businesses, and legal professionals alike. Their team combines practical law-enforcement experience with modern investigative tools, allowing them to handle cases efficiently and discreetly.
Surveillance is one of their key strengths, often used in infidelity, fraud, or insurance-related investigations. The firm also conducts thorough background checks using public records, interviews, and digital research—helpful for employment screening or business partnerships. Another specialised service is skip tracing, which involves locating missing individuals or those attempting to avoid legal obligations. Working closely with legal professionals, the agency provides reliable evidence and case support, helping clients move forward with confidence.
Prices:
They don’t post their service fee publicly. Kindly visit or contact them directly for inquiries.
Highlights:
- Managed by former Singapore Police Force officers
- Strong expertise in surveillance and background checks
- Skip tracing and legal investigation support
- Serves individuals, corporations, and law firms
Customer Reviews:
justjoeyl lim
Hired Eyes Private Investigators for a business fraud check. The service was engaged on Friday and evidence were found within 1-2 days. Mark guided me step by step on maximum extraction on the fraudster. The fraudster made full restitution within 6 days from start. Highly recommended.
Nina Williams
We had a great experience with the team at Private Eyes. We needed help proving the illegal employment of a former emoployee undergoing a WICA case. After 1 week we received full evidence and detailed report proving his illegal employment which allowed us to repatriate him back to his home country immediately. The officer in charge is a bit stoic and limits the communication during the process which worried me at first, but I can attest to their solid work and follow through.
Aaron goh
Great experience with Eyes Private Investigator! As promised, they delivered the evidence I needed within the 3-day package. Their service was efficient and professional. Thanks to the team for helping me out during a tough time.
Website: http://www.sgprivateinvestigators.com/
Contact: 8806 4000
Location: 151 Chin Swee Rd, #02-11 Manhattan House, Singapore 169876
Opening Hours: Open 24 hours
8. INTERNATIONAL INVESTIGATORS
International Investigators Pte Ltd is a PLRD-licensed agency with more than three decades of investigative experience and thousands of completed cases. As members of global professional investigator associations, the firm can tap into overseas networks when cases require cross-border enquiries or surveillance.
Their expertise covers matrimonial and commercial investigations, along with more specialised services such as overseas surveillance, debugging, handwriting analysis, and digital forensics. The agency emphasises confidentiality and handles client information in compliance with Singapore’s Personal Data Protection Act. Clients value their structured investigative methods and clear communication, which help ensure that evidence collected is reliable and legally defensible. With a balanced mix of traditional surveillance and modern forensic techniques, the agency offers comprehensive support for complex cases.
Prices:
They don’t post their service fee publicly. Kindly visit or contact them directly for inquiries.
Highlights:
- Licensed by PLRD with 30+ years of experience
- Global investigative network for overseas cases
- Offers digital forensics and specialised investigations
- Strict PDPA-compliant data handling
Customer Reviews:
Ethan Hunt
Very experienced team, knows how and what to look for when u need them to find out discretely, well coordinated. And very reasonable fee, which is important for many who may not be able to afford and yet needs to know the truth. Highly recommended !
Simin Liu
I was so lucky to find a private investigation company; otherwise, I would never have known the truth behind my divorce. They were decisive, serious, responsible, and professional. They also provided advice and assistance based on my budget. My case is still in court, and this evidence has become a strong asset in many areas, such as applying for social work and a protection order. They have been a great help to us foreign brides, both practically and emotionally, in handling our cases. I hope they stay true to their original intentions and continue to help everyone.
Audrey Soh
Thank you International Investigators for helping with my investigation & had resolved it professionally and within a short period of time! Thanks to your Team! I would recommend anyone who needs your services without any hesitation!
Website: http://www.intlpi.com/
Contact: 6337 6608
Location: 60 Albert St, #08-06, Singapore 189969
Opening Hours: Open 24 hours
BestLah’s Recommendation
With several strong agencies to consider, the key question becomes: which one aligns with your needs? Some cases require speed, others demand global reach or meticulous court documentation.
Here’s how to narrow it down.
1. If You Need Court-Admissible Evidence For Legal Proceedings
Our Pick: Ace Private Investigations
Ace Private Investigations is a strong choice if your case involves litigation, divorce settlements, custody disputes, or employment tribunals. With nearly two decades of experience and licensing under the Police Licensing & Regulatory Department (PLRD), the agency is known for producing structured, timestamped evidence that lawyers can confidently present in court.
Clients frequently highlight their meticulous documentation and clear factual reporting — crucial when credibility matters. If you’re preparing for a legal battle and cannot afford loosely gathered information, Ace stands out for its disciplined evidence collection and procedural reliability.
2. If You Suspect Infidelity And Need Experienced, Empathetic Handling
Our Pick: Asia Top Investigation
Asia Top Investigation is particularly well-suited for matrimonial cases where emotions run high. Founder Vincent Tan brings decades of investigative experience, and client reviews consistently mention not just results, but the calm and empathetic support provided throughout the process.
The agency specialises in discreet surveillance and thorough documentation while maintaining strong confidentiality standards. If you are navigating a sensitive marital issue and need both professional competence and human understanding, Asia Top Investigation offers a balanced approach that combines strategy with emotional awareness.
3. If Your Case Involves Overseas Or Cross-Border Elements
Our Pick: International Investigators
When investigations extend beyond Singapore, International Investigators becomes especially valuable. With more than 30 years of experience and membership in global investigative networks, the firm can coordinate overseas surveillance and enquiries efficiently.
They also provide specialised services such as digital forensics, handwriting analysis, and technical debugging, making them a practical choice for complex or high-stakes cases. If your situation involves foreign jurisdictions, offshore assets, or international parties, their established global connections offer a significant advantage.
4. If You Need Fast Surveillance Or Fraud Detection
Our Pick: Eyes Private Investigators Pte Ltd
Eyes Private Investigators is a strong option if speed is critical. Managed by former Singapore Police Force officers, the team is known for efficient surveillance operations and quick turnaround times, particularly in fraud, insurance, and workplace misconduct cases.
Several client testimonials highlight evidence delivered within days, not weeks. Their structured approach, combined with practical law-enforcement experience, makes them well-suited for cases where time-sensitive proof can make or break negotiations or recovery efforts.
Final Thoughts
Hiring a private investigator isn’t about spying for curiosity’s sake but gaining clarity when emotions or uncertainty cloud your judgement. From corporate risks and missing persons to delicate family matters, the agencies listed above can handle them all with professionalism, discretion, and legal compliance. Choosing a licensed firm with proven experience helps ensure the evidence you receive is accurate, ethical, and genuinely useful.
Of course, not every situation uncovered by an investigation needs to end in conflict. If your concerns are marital in nature, you might consider pairing investigative findings with guidance from a qualified marriage counselling service in Singapore. Honest conversations, supported by professional advice, can sometimes help couples resolve issues constructively and move forward with confidence.
Frequently Asked Questions (FAQ)
2. How much does it cost to hire a PI?
Fees are typically structured around hourly rates or package deals, depending on the complexity of the task. On average, you can expect to pay between $100 and $200 per hour for surveillance. Many agencies offer matrimonial packages starting from $2,000 to $5,000 for a block of hours, though additional costs like transport, meals, and specialised equipment may be billed separately.
3. Can the evidence gathered by a PI be used in court?
Evidence such as photographs, video footage, and detailed surveillance logs is generally admissible in civil proceedings, like divorce or child custody cases, provided it was obtained legally. If a PI breaks the law to get the information—such as by trespassing—the court may reject the evidence entirely.
4. Can a PI hack into my spouse’s phone or social media accounts?
No, this is a common misconception. Hacking, installing spyware, or accessing password-protected accounts without authorisation is a direct violation of the Computer Misuse Act. Professional PIs will refuse such requests to avoid criminal charges and ensure that any other evidence they collect remains untainted.
5. How can I verify if a private investigator is properly licensed?
You should always ask the investigator to produce their PLRD-issued identification card during your first meeting. Additionally, you can verify the legitimacy of an agency and its investigators through the official GoBusiness portal or the Singapore Police Force website to ensure their licences are current and valid.
6. Are PIs allowed to use GPS trackers on vehicles?
The use of GPS trackers is a legal grey area and is generally restricted. Typically, a tracker can only be installed on a vehicle if the person commissioning the search is the legal owner or a joint owner of that vehicle. Installing a tracker on a car that you have no legal claim to could be classified as harassment or a breach of privacy.
7. Can a PI enter private property or install hidden cameras in a house?
A PI has no more legal power than an ordinary citizen, meaning they cannot trespass on private property. They are not allowed to enter a home without permission or install "nanny cams" in a residence they do not live in. Most surveillance is conducted from public vantage points or shared spaces like shopping centres and car parks.
8. Will my personal information and the investigation remain confidential?
Licensed PIs are bound by a code of conduct and the Personal Data Protection Act (PDPA). Established agencies maintain strict confidentiality protocols and will never reveal the client’s identity to the subject of the investigation. Most will sign a non-disclosure agreement (NDA) before the start of any assignment.
9. What kind of cases do PIs handle besides suspected infidelity?
While matrimonial cases are the most famous, PIs also handle missing person searches, background checks for potential employees, and commercial investigations into fraud or intellectual property theft. They are also frequently engaged to serve legal documents or locate debtors who have gone "missing" to avoid payment.
10. Do private investigators have the power to make an arrest?
They do not. A private investigator is not a police officer and holds no special powers of arrest or search. Their role is strictly to observe, record, and report. If they witness a crime being committed, they must contact the authorities just like any other member of the public.