Marshall Agency
“Their service is amazing and anyone who knows the management and their staff knows they will be well taken care of and make you feel safe!”
Best Private Investigators near Pasadena, TX
1 of these agencies is based in Pasadena; the others serve Pasadena from Houston (17 mi) and Alvin (17 mi).
4 open 24/7 · 6 open weekends · 8 rated 4.5+ · 5 show a license
Data verified October 15, 2026
Aces Private Investigations Houston
“Took 5 min for Henry to connect me with a old friend”
Powerhouse Discovery
“Powerhouse was quick to respond, accurate in its work, professional, and very accommodating.”
Powerhouse Forensics - Digital Forensics Experts
“If I ever need private investigation services again I will be reaching back out to Gary from Powerhouse Forensics.”
Frizell Group International
“Best place for off duty police officers and investigations”
EM Investigations
The 10 agencies on this page are the private investigators listed for Pasadena, TX. What each one states about its license, its specialties and the areas it covers comes from its own website; ratings and quotes come from public reviews.
Area overview: Pasadena, TX
The 10 agencies on this page are rated from 4.3 to 5.0 across 528 reviews; 2 have 50 or more reviews and 8 are rated 4.5 or higher. When clients rate these agencies on specific qualities, they most often praise professionalism (100%), responsiveness (73%) and quality (55%). The topics that come up most in reviews of the agencies on this page are "communication" and "results". 4 are open around the clock and 6 are open on weekends. 5 show a license on their websites and 1 has a BBB rating of A or A+. Domain records put 5 websites of the agencies on this page at ten or more years old; the oldest dates from 1999. 4 offer urgent consultations and 4 offer a free initial consultation. We have a website on file for all 10 of the agencies on this page; 9 publish a contact page and 8 list a public email. We count these figures across the agencies on this page; distances are straight-line, and hours and prices change, so confirm the details with the agency before you book.
Do investigators listed for Pasadena discuss a case free?
4 of the 10 agencies state that a first consultation costs nothing. Use it to describe the problem and hear whether the work can be done lawfully at all. A straight agency will sometimes tell you on that call that what you want cannot be obtained, which saves you a retainer.
Morris Investigations
“Would recommend him to anyone in search of a private investigator.”
Praetorian Protective Services Corporation
“I cannot begin to express how much I appreciate the hard work Kat and her team at Praetorian put in to each and every single one of the cases in they serve process for me.”
Cardinal Investigations
“Thorough and very responsive to questions and concerns during entire investigation.”
Stealth Investigations
“They helped me to resolve a long outstanding issue and did so with professionalism and trust.”
Why these companies made our list
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