Best Private Investigators in London

Handpicked from 65 vetted & reviewed Private Investigator & Detective agencies in the London area, discover the top 5 leading options among the selected group of 24 finalists.

Nationwide Investigations Group

Nationwide Investigations Group

(7)
Due Diligence, Corporate Intelligence, Asset Investigations
““I recently used Nationwide Investigations to provide me with a Due Diligence report on a potential investor and his company and was amazed at the results and the turnaround time to produce the report. It was all about mitigating the risks for me ...”
Emergency Services
100 Borough High St, London SE1 1LB
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Private Investigator

Private Investigator

(3)
Fraud Investigations, Person Tracing, Cheating Partner
“These guys were very helpful and efficient. Would definitely recommend”
In Business Since 2004
Emergency Services
49 Queen Victoria St, London EC4N 4SA
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The Local Detectives

The Local Detectives

(28)
  • Company
  • Professional
  • Experience
“I hired The Local Detectives for a Surveillance job in Mayfair, London. They successfully watched my partner and got me excellent evidence in the form of photos and videos which I found very impressive, the quality was great. Excellent service and ...”
30+ Years Experience
Emergency Services
3rd floor, 86-90 Paul St, London EC2A 4NE
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Private Investigator UK

Private Investigator UK

(27)
Ewhoring Investigations, Trace An Individual, Private Investigations
“This excellent company helped me win a substantial case against a builder who had continuously lied about his assets and past work. The information they provided me with, was used to enable the Judge to make an order for him to pay nearly 10K within...”
In Business Since 2013
Free Initial Consultation
1st Floor, 2 Woodberry Grove, London N12 0DR
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Alpha 1 Legal Services

Alpha 1 Legal Services

(18)
Surveillance Cases
“I've worked with Paul on a growing number of instructions and it continues to be an absolute pleasure dealing with him. Paul has a very practical approach which is well aligned to how we like to work with our partners. Whats more, this approach de...”
Emergency Services
124 City Rd, London EC1V 2NX
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Best of 2024

Qualification Criteria for best of Winners

Minimum Overall Score
95 (100)
Minimum Reputation Rank
98.7 Percentile
All of our award winners are based on identifiable facts - reviews, performance, and experience - collected by scientific means. We use this data to assess each business’s essential features, weighting them according to their importance to customers.
Read our methodology
Prominent finalists
Tacet Global

Tacet Global

(9)
Legal and Other Services, Investigation Services, Security Services
“Super fast service. They found the person I wanted on the day they started the work. Am really impressed. Thanks guys!”
Transparent Fees & Pricing
In Business Since 2019
Emergency Services
International House, 124 Cromwell Rd, London SW7 4ET
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Private Investigator London - Principal Investigations

Private Investigator London - Principal Investigations

(21)
  • Understanding
“Definitely I'll recommend this service. They are professional, and most importantly friendly!! thank you very much”
Craven St, London WC2N 5NP
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Trojan Surveillance Private Investigator

Trojan Surveillance Private Investigator

(6)
Discreet Surveillance Services, Private Client Services, Legal & Litigation Support
“I am a long term client and I would highly recommend them. Very professional and discreet. I wouldn't go anywhere else, service is excellent.”
Emergency Services
5th Floor, 167-169 Great Portland St, London W1W 5PF
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National Private Investigators

National Private Investigators

(19)
“Definitely 100% recommend. Ben was patient, welcoming, diligent and a fast communicator. Can't thank him and the team enough. I had no shame in asking millions of questions! Thank you!!”
Emergency Services
71 75 Shelton St, London WC2H 9JQ
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Sloane Risk Group

Sloane Risk Group

(8)
  • Professional
  • Team
“I have had a variety of positive experiences with Sloane Risk Group. From requiring immediate support to remote teams with urgent security needs through to their surveillance and counter surveillance skills and excellent penetration testing. The re...”
In Business Since 2020
Emergency Services
71-75 Shelton St, London WC2H 9JQ
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SPS Investigations

SPS Investigations

(3)
Bug Sweeps, Private Investigations in London, Cheating Partners
“SPS handled my sensitive issue with the upmost professionalism. Shaun was exceptionally responsive and gained the evidence I required. I would absolutely recommend their service.”
Emergency Services
First Floor Office, 3 Hornton Pl, London W8 4LZ
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Private Detective London

Private Detective London

(9)
Matrimonial Investigation, Consultancy, Corporate Investigations
“We operate a prestige property portfolio throughout the UK - PDL has assisted us since 2016 with screening and person and asset tracing for recovery purposes, always a comprehensive personal service.”
In Business Since 2014
Transparent Fees & Pricing
20 N Audley St, London W1K 6LX
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Valorous Group

Valorous Group

(3)
Intelligence Gathering, Security System Design, Physical Protection
“The epitome of professionalism is all that can be said. Discreet, diligent with a wealth of experience. Can not recommend Valorous Group enough.”
Emergency Services
4th Floor, 43 Berkeley Square, London W1J 5AP
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Verity Henton Private Investigations Mayfair

Verity Henton Private Investigations Mayfair

(7)
“Pleasure to work with. Professional, knowledgeable and results are accurate!”
In Business Since 2020
Emergency Services
23 Berkeley Square, London W1J 6HE
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London Private Detectives

London Private Detectives

(8)
Lie Detector Test, Digital Forensics, Security Services
“Very professional and confidential service- Thankyou”
Free Initial Consultation
25+ Years Experience
Emergency Services
3rd Floor, 207 Regent St., London W1B 3HH
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PEL Consultancy Services

PEL Consultancy Services

(2)
Marital Infidelity Investigation Experts, Private Investigation Services, Business & Corporate Investigation Services
“Excellent and professional service. Don't listen to these google reviews. I am really surprised to see any low ratings. PEL were incredibly professional and understanding, and I highly recommend them. They are responsive, prompt and straightforward w...”
In Business Since 2020
Emergency Services
Unit 317, Harbour Yard, London SW10 0XD
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Helios Investigations

Helios Investigations

(1)
Matrimonial / Infidelity, Covert Surveillance, Workplace Investigations
“Great company, top surveillance operatives who are able to undertake complex surveillance work in central London successfully !!!”
In Business Since 2019
Emergency Services
776-778 Barking Rd, London E13 9PJ
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ASV LAW

ASV LAW

(16)
Commercial Litigation Strategy, Strategic Alliance Partnership Programme, Crisis Response
“I have recently been bombarded with fraudulent emails of someone pretending to work for ASV Lawfirm in the UK. I live in the US, and I recently spoke with Lauren van den Heever legal Clerk and she was very professional and welcoming in her approach t...”
In Business Since 2011
Transparent Fees & Pricing
1 Knightsbridge Grn, London SW1X 7QA
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Bravo Security

Bravo Security

(11)
  • Team
“Bravo security provide exceptional security, professional staff and are diligent with organisation. For business events or other security requirements, I highly recommend Cezar and the team!”
Emergency Services
Damsel House, Unit C1, First Floor, Dragonfly Pl, London SE4 2FN
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Argo Investigations

Argo Investigations

(1)
“they have been of great help in recovering money from our creditors”
Emergency Services
In Business Since 2017
Licensed
60 St Martin's Ln, London WC2N 4JS
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Conflict International

Conflict International

(1)
“A comprehensive range of excellent services!”
In Business Since 2006
Emergency Services
180 Piccadilly, St. James's, London W1J 9HF
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National Private Detective Force - Npdf

National Private Detective Force - Npdf

(2)
“Professional Investigator - very pleased with the results”
Free Initial Consultation
Emergency Services
Transparent Fees & Pricing
3, Bolt Court, Fleet St, London EC4A 3DQ
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Westminster Security

Westminster Security

(15)
Residential Security Services, Close Protection, Private Investigation
“I used Westminster Security this weekend and I have been highly impressed by the professionalism from this company. From the first call to John to the last, everything request I made was tailor made and nothing was too much for them to handle. Absolu...”
16 Old Queen St, London SW1H 9HP
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E1 Security

E1 Security

(1)
Event Security, Door Supervisors, Security Guards
“Have used E1 multiple times in my property management role, going back 5 years - From Hackney to Hampstead - and no complaints! Highly recommend”
In Business Since 2009
Free Initial Consultation
202b, Tally Ho corner, London N12 0EH
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Why these companies made our list

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