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4 Best Private Investigators in Houston (2026)

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

Fenris Morrow
By Fenris Morrow, Expert in Professional Services · ✓ Data verified August 2026 · 7 min read

Calling a private investigator in Houston usually means something is already unresolved, a custody question, a missing person, a suspicion you can't shake. These four have logged 573 Google reviews between them, and every one holds a rating of 4.7 or higher, so the split here comes down to specialty: infidelity and custody work versus background checks and corporate investigations.

Short answer: Terrance Private Investigator leads with a 5.0 average across 318 reviews, the deepest track record here, handling infidelity and child custody cases. ACES Private Investigations Houston (4.9, 104 reviews) is the fast-turnaround pick for background checks, and Kgriff Investigations, Inc. (4.7, 65 reviews) specializes in skip tracing and locating people.
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Houston private investigators, compared

# Business Rating Reviews Best for
1 Terrance Private Investigator 5.0 ★ 318 Infidelity and child custody cases View ›
2 ACES Private Investigations Houston 4.9 ★ 104 Background checks with fast turnaround View ›
3 Mayer Security Services 5.0 ★ 86 Security services with investigation capability View ›
4 Kgriff Investigations, Inc. 4.7 ★ 65 Skip tracing and locating people View ›
4 Best Private Investigators in Houston (2026)

Our picks, reviewed

Terrance Private Investigator logo
#1 Overall🕑 Open 7 days

Terrance Private Investigator

5.0318 Google reviews

Terrance Private Investigator has served Houston and Harris County since 2009, according to its site, which states it's licensed by the Texas Department of Public Safety. The firm focuses on infidelity investigations and child custody documentation, and describes its approach as building each case around the client's specific situation rather than a fixed template.

What people praise

  • Reviewers describe Terrance himself as professional, discreet, and communicative throughout the process
  • Praised for attention to detail and thorough follow-through on cases
  • Multiple clients say they were kept informed at every step without feeling overwhelmed
  • Described repeatedly as handling stressful, sensitive situations with care
Reputation scorecardrank in Houston
Rating5 / 5
Review volume318 · 97th
Confidencehigh
Recency3 months ago
Info completenesssite · phone · hours
Rating breakdown99% 5-star
✓ VerifiedSource: Google

Our take: The deepest review base and a perfect rating on this page. The consistent theme across reviews, discretion paired with clear communication, is exactly what most people want from this kind of investigation.

Website+1832-404-3400 Directions

11811 North Fwy #811, Houston, TX 77060

ACES Private Investigations Houston logo
#2🕑 Open 7 days

ACES Private Investigations Houston

4.9104 Google reviews

ACES Private Investigations Houston is a downtown-based firm that reviewers describe as working frequently with personal injury law firms on background checks, alongside general investigative services. Investigator Henry is named specifically in several reviews for responsiveness.

What people praise

  • Reviewers highlight same-day turnaround on background checks, in one case under an hour
  • Described as responsive and quick to answer the phone
  • Pricing described by multiple clients as reasonable and clearly explained upfront
Reputation scorecardrank in Houston
Rating4.9 / 5
Review volume104 · 91th
Confidencemoderate
Recency5 months ago
Info completenesssite · phone · hours
Rating breakdown97% 5-star
✓ VerifiedSource: Google

Our take: The clear pick if speed matters, several reviewers specifically cite fast turnaround as the reason they'd return. Strong second choice on this page with a near-perfect rating.

Website+1281-404-4366 Directions

1001 Texas Ave Ste 1400, Houston, TX 77002

Mayer Security Services logo
#3🕑 Open 7 days↩ Responds to reviews

Mayer Security Services

5.086 Google reviews

Mayer Security Services is primarily a Houston security guard company, providing services like construction site security, executive protection, and event security, with private investigation listed among its broader service offerings. Its site describes the firm as veteran-owned.

What people praise

  • Reviewers consistently praise guards and staff as professional and reliable across a range of settings, from construction sites to film shoots
  • Described as calm and well-coordinated in high-pressure situations like funeral security
  • Quick response times mentioned by more than one commercial client

Worth knowing

  • The reviews on file are almost entirely about security guard services, not private investigation specifically, so its track record for investigative work is thinner than the other names here
Reputation scorecardrank in Houston
Rating5 / 5
Review volume86 · 84th
Confidencemoderate
Recency4 months ago
Info completenesssite · phone · hours
Rating breakdown100% 5-star
✓ VerifiedSource: Google

Our take: Ranks third on rating and volume, but worth flagging clearly: nearly all the review evidence available is about its security guard work, not investigations. If you specifically need a private investigator, verify that service directly with them before booking.

Website+1281-202-9862 Directions

1201 Fannin St Ste 202, Houston, TX 77002

Kgriff Investigations, Inc. logo
#4🕑 Open 7 days

Kgriff Investigations, Inc.

4.765 Google reviews

Kgriff Investigations, Inc. is a Bellaire-based, woman-owned private investigation and civil process serving firm that describes itself on its site as a large, nationwide practice headquartered in Texas. Reviewers mention background checks, surveillance, and skip tracing (locating people) as the services they used.

What people praise

  • Reviewers describe the team, and Kathy specifically, as warm and supportive during difficult situations
  • Praised for finding people with minimal starting information, in one case within about 24 hours
  • Surveillance work described by one client as producing solid video evidence and reporting

Worth knowing

  • A handful of lower ratings appear in the distribution alongside the mostly five-star reviews, though no specific complaint text was available in the sampled reviews
Reputation scorecardrank in Houston
Rating4.7 / 5
Review volume65 · 78th
Confidenceearly
Recency4 weeks ago
Info completenesssite · phone · hours
Rating breakdown91% 5-star
✓ VerifiedSource: Google

Our take: The strongest option here specifically for locating someone or process serving, with reviewers repeatedly citing quick results even from thin starting information.

Website+1713-526-7711 Directions

6750 W Loop S #120, Bellaire, TX 77401

5

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How we score these investigators

Rating is each firm’s live Google average. Review volume shows how many clients actually left a rating, measured against the others on this page. Confidence blends the two, so a 5.0 built on 318 reviews carries more weight than a 5.0 on a smaller base. Recency tracks how recently people are still reviewing. No business can pay to change any of these numbers.

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

None of the firms on this page publish flat rates for private investigation work. Pricing for this kind of service typically depends heavily on the type of case (infidelity, background check, surveillance, or skip trace), how long it runs, and how much travel or documentation is involved. Ask each firm directly for a quote and ask what’s included, such as reporting or court-ready documentation, before you commit.

Serving all of Houston and Harris County

These firms are based around North Freeway, downtown, and Bellaire, and several describe serving Harris County broadly rather than a single neighborhood. If you’re searching for a private investigator near me in Houston, confirm directly whether a firm covers your specific area, since some work case types like process serving that require travel to a specific address.

What to ask before you hire a private investigator

  • Are you licensed to operate as a private investigator in Texas, and can you provide your license number?
  • What’s included in your fee: reporting, evidence, court-ready documentation?
  • How do you handle confidentiality and discretion during the investigation?
  • What’s your typical timeline for this type of case?
  • How do you communicate updates during an active investigation?
  • What happens if the investigation doesn’t turn up the information I’m looking for?

Frequently asked questions

Are these rankings paid?

No. Rankings come from public Google data. A business can pay to be a Featured Partner (badge and top placement), but that never changes another business’s score or position.

How did you choose these private investigators?

We pulled every private investigation business in Houston with a real Google Business Profile, then ranked by rating, review volume, and how recently clients were still reviewing them.

How often is this updated?

This page was last verified in August 2026 using live Google ratings and reviews.

Is private investigation legal in Texas?

This page reflects what businesses and reviewers say publicly on Google; we don’t independently verify licensing. Ask any firm directly for their Texas Department of Public Safety license before hiring, as one firm on this list states explicitly on its own site.

What kinds of cases do these investigators typically handle?

Based on the reviews and site text available, cases mentioned include infidelity, child custody documentation, background checks, surveillance, and skip tracing (locating a person). Confirm a firm handles your specific case type before hiring.

The bottom line

Terrance Private Investigator is the safe default given its review depth and the consistent focus on discretion and communication. If speed on a background check is the priority, ACES is worth a direct call instead. Whichever firm you choose, confirm licensing and what’s included in the fee before signing anything.

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