5 Best Private Investigators in Singapore (2026)

Independently ranked by our review of ratings, reviews and reputation · How we chose

By Fenris Morrow, Expert in Professional Services · ✓ Data verified August 2026 · 8 min read

Most people who call a private investigator in Singapore are doing it once, often at one of the hardest points in their life, whether that is a suspected affair, a custody dispute or a corporate background check. The agencies here have logged over 730 Google reviews between them, and every one is licensed by Singapore's Police Licensing and Regulatory Department, which is the first thing worth confirming before you engage anyone.

Short answer: Ace Private Investigations holds the most reviews on this list at 4.9 across 235 ratings, handling matrimonial, corporate and custody cases with a named lead investigator, Navin. Asia Top Investigation (4.9, 225 reviews) is a close second, also known for matrimonial and corporate work. Every agency here is PLRD-licensed, but pricing is rarely published, so get a written quote before you commit to anything.

Jump to a business

1. Ace Private Investigat…
2. Asia Top Investigation…
3. KOKUSAI™ Catch Cheatin…
4. Privateye Investigatio…
5. DETECTIVE DON PI PTE.…
Get listed

Singapore's Private Investigators Compared

#	Business	Rating	Reviews	Best for
1	Ace Private Investigations Pte Ltd	4.9 ★	235	Matrimonial and corporate cases	View ›
2	Asia Top Investigation LLP	4.9 ★	225	Matrimonial cases needing legal-grade evidence	View ›
3	KOKUSAI™ Catch Cheating Spouse(1984)	4.8 ★	158	Long-established, matrimonial focus	View ›
4	Privateye Investigation & Consultancy Pte Ltd	4.5 ★	65	Ex-police-led, matrimonial and WICA cases	View ›
5	DETECTIVE DON PI PTE. LTD.	4.7 ★	51	Broad case range, including corporate moonlighting	View ›

5 Best Private Investigators in Singapore (2026)

Our top picks, reviewed

#1 Overall🕑 Open 7 days

Ace Private Investigations Pte Ltd

4.9235 Google reviews

Ace Private Investigations Pte Ltd is a Singapore private investigation agency at Golden Landmark Shopping Complex, licensed by the Police Licensing and Regulatory Department (PLRD) with a stated 19 years of operating history. Its work spans matrimonial, commercial and child custody investigations, and reviews repeatedly name lead investigator Navin for handling cases discreetly and delivering evidence that held up in legal proceedings.

What people praise

The most-reviewed agency here at 4.9 across 235 reviews
Reviewers describe surveillance reports as detailed enough to use in court or disciplinary hearings
Navin named consistently across matrimonial, corporate and custody cases for professionalism and clear communication
Handles both individual matrimonial cases and corporate due diligence work

Worth knowing

A handful of one-star ratings sit alongside the otherwise strong review base, with no detailed public complaints attached

Reputation scorecardrank in Singapore

Rating4.9 / 5

Review volume235 · 97th

Confidencehigh

Recency3 months ago

Info completenesssite · phone · hours

Rating breakdown98% 5-star

✓ VerifiedSource: Google

Our take: The most-reviewed and highest-rated general-purpose investigator here, with reviewers consistently naming the same lead investigator across very different case types. A reasonable first call for most situations.

Website +6564911005 Directions

390 Victoria St, #03-17 Golden Landmark Shopping Complex, Singapore 188061

#2🕑 Open 7 days↩ Responds to reviews

Asia Top Investigation LLP

4.9225 Google reviews

Asia Top Investigation LLP is a licensed Singapore investigation agency at Rochester Drive specialising heavily in matrimonial investigations, alongside corporate case work. Reviewers describe engaging the firm, often after a disappointing experience elsewhere, and credit lead investigator Vincent with delivering clear, well-documented evidence used to reach settlements.

What people praise

Strong 4.9 rating across 225 reviews, close behind the top pick
Multiple reviewers describe evidence gathered as directly leading to a signed settlement or resolution
Vincent named specifically for daily progress updates and sound advice on how to proceed
Repeat corporate clients cite consistent professionalism across several engagements

Worth knowing

Some reviewers mention a prior bad experience with a different, unrelated agency before switching here, which is worth noting only as context, not a criticism of this business

Reputation scorecardrank in Singapore

Rating4.9 / 5

Review volume225 · 90th

Confidencehigh

Recency6 weeks ago

Info completenesssite · phone · hours

Rating breakdown96% 5-star

✓ VerifiedSource: Google

Our take: A strong specialist in matrimonial cases specifically, with reviewers describing detailed, court-ready evidence and regular communication throughout the process.

Website +6588200007 Directions

31 Rochester Dr, Ste 1, Level 24, Singapore 138637

#3🕑 Open 7 days↩ Responds to reviews

KOKUSAI™ Catch Cheating Spouse(1984)

4.8158 Google reviews

KOKUSAI Catch Cheating Spouse is a Singapore private investigation agency at Peninsula Plaza, operating since 1984 and focused primarily on matrimonial and infidelity cases. It states it has been graded 'A' (Excellent) by the Singapore Police Force. Reviews are largely five-star and describe founder Magnum personally guiding clients through emotionally difficult cases, though one detailed one-star review raises concerns about high quoted pricing and the founder's manner during a consultation, which the owner disputes at length in a public reply.

What people praise

Longest operating history on this list, since 1984
Reviewers describe the founder as deeply personally invested in each case, with case numbers cited for reference
Multiple reviewers say the agency worked with them on payment terms during financial hardship
Reviewers commonly cite specific case outcomes, such as resolving matrimonial disputes

Worth knowing

One detailed recent review describes a high price quote and an uncomfortable consultation; the owner disputes this in a public response
Its most recent reviews are older than the other names on this list

Reputation scorecardrank in Singapore

Rating4.8 / 5

Review volume158 · 83th

Confidencemoderate

Recency2 years ago

Info completenesssite · phone · hours

Rating breakdown96% 5-star

✓ VerifiedSource: Google

Our take: A long-established matrimonial specialist with a loyal client base, but the one detailed negative review is specific and worth reading in full, alongside the owner's response, before you book a consultation.

Website +6581821221 Directions

111 N Bridge Rd, #24-05 Peninsula Plaza, Singapore 179098

#4🕑 Open 5 days/wk↩ Responds to reviews

Privateye Investigation & Consultancy Pte Ltd

4.565 Google reviews

Privateye Investigation & Consultancy Pte Ltd is a licensed Singapore agency at Eon Shenton, led by a former Singapore Police Force officer with over 30 years of investigative background. It handles matrimonial, corporate, WICA and insurance-related cases, and offers a free first consultation. Reviewers consistently name Jeffrey as the point of contact, describing him as knowledgeable about police procedure and willing to advise without pressure to sign up.

What people praise

Led by a former police officer with three decades of investigative experience, per its own site
Jeffrey praised repeatedly for offering honest advice, sometimes at no charge, without hard-selling
Reviewers describe detailed, precise case summaries useful for legal proceedings
Free confidential first consultation offered

Worth knowing

Lowest rating on this page, at 4.5, with a wider spread of scores than the top names on this list
Smaller, older review base overall

Reputation scorecardrank in Singapore

Rating4.5 / 5

Review volume65 · 77th

Confidenceearly

Recencyabout a year ago

Info completenesssite · phone · hours

Rating breakdown82% 5-star

✓ VerifiedSource: Google

Our take: A solid choice if a former police background matters to you, and reviewers consistently describe straightforward, low-pressure advice rather than a hard sell.

Website +6590465299 Directions

70 Shenton Wy, #11-15 Eon Shenton, Singapore 079118

#5🕑 Open 7 days↩ Responds to reviews

DETECTIVE DON PI PTE. LTD.

4.751 Google reviews

Detective Don PI Pte Ltd is a licensed Singapore private investigation agency on MacPherson Road, run by former Singapore Police Force officers, covering matrimonial, corporate, child custody, surveillance and undercover cases. It also offers mystery-shopper and counselling services. Reviewers describe engagements ranging from personal legal matters to corporate cases involving suspected employee moonlighting.

What people praise

Strong 4.7 rating with reviewers citing thorough, patient handling of sensitive cases
Referred by past clients for corporate moonlighting investigations specifically
Reviewers describe consistent availability, including outside standard office hours
Run by former police officers, per its own site

Worth knowing

Smallest review count on this list, so the sample size is thinner than the top names

Reputation scorecardrank in Singapore

Rating4.7 / 5

Review volume51 · 70th

Confidenceearly

Recency5 months ago

Info completenesssite · phone · hours

Rating breakdown92% 5-star

✓ VerifiedSource: Google

Our take: A capable generalist agency with a genuinely broad case range, including corporate-side work that some of the other names here do not emphasise as strongly.

Website +6588100981 Directions

111 MacPherson Rd, Singapore 348502

Your business here

Get listed on this page, in front of local customers already searching for you.

Claim this spot ›

How we score

Every number on this page comes from public Google data on the date shown, not from opinion or payment. Rating is each agency’s live Google star average. Review volume is how many clients have rated them, ranked against other private investigators in Singapore. Confidence weighs the rating by that volume, so a strong score from over 200 reviews carries more weight than one from a few dozen. Recency reflects how recently clients are still leaving reviews. No business can pay to change these numbers.

How much does a private investigator cost in Singapore? (2026)

Private investigation fees in Singapore vary enormously by case type, duration and the scope of surveillance required, and none of the agencies above publish standard rates. Get a written, itemised quote before engaging anyone, and ask what happens if the case runs longer than expected.

Serving all of Singapore

The agencies above operate from Victoria Street, Rochester Drive, Peninsula Plaza, Shenton Way and MacPherson Road, and most take cases across the island and handle confidential consultations by phone. Searching for a private investigator near me? Every listing above shows a live phone number so you can reach someone directly and in confidence.

Best Life Coaches in Singapore

What to ask before you hire a private investigator

Are you licensed by the Police Licensing and Regulatory Department (PLRD)?
What is the total estimated cost, and how is it structured (hourly, per case, or a flat fee)?
What happens if the case takes longer than expected? Are additional charges explained upfront?
Will the evidence gathered be admissible or usable in court or a legal proceeding?
Who will be my direct point of contact throughout the case?
How do you handle confidentiality and data protection for sensitive cases?

Frequently asked questions

How did you choose these private investigators?

We started from private investigation agencies in Singapore with a public Google presence, then ranked by rating, review volume, consistency and recency. See How we score above.

Are these rankings paid?

No. Rankings come from the public Google data in the scorecard. A business can pay to be a Featured Partner, which adds a badge and top placement, but that never changes another business’s score or position on the underlying data.

How often is this updated?

The data carries a verified date (August 2026 on this page). We refresh listings periodically so ratings and review counts stay current.

Is it legal to hire a private investigator in Singapore?

Yes, provided the agency is licensed by the Police Licensing and Regulatory Department (PLRD) and the investigation methods used are lawful. Confirm licensing directly before engaging anyone.

What kinds of cases do these agencies handle?

The agencies above cover matrimonial and infidelity cases, child custody disputes, corporate due diligence, background checks, and in some cases WICA and insurance-related investigations. Confirm a specific agency’s experience with your case type before booking.

The bottom line

Ace Private Investigations is the safe default for its review volume and broad case range, while Asia Top Investigation is a strong specialist choice for matrimonial cases specifically. Whichever agency you call, confirm PLRD licensing and get a written quote before any evidence-gathering begins.

Best Personal Services in other cities

More categories in Singapore

Own one of these businesses, or want to be here?

Claim your spot on this page: Basic listing $50 or Premium $100 for the top spot, held a full year. Both include a permanent link to your site.

Get listed See pricing