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21 agencies listed · all 21 in Houston · 6 open 24/7 · 12 open weekends · 17 rated 4.5+
Data verified October 18, 2026
The 21 agencies on this page are the private investigators listed for Houston, 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.
All 21 agencies we list here are in Houston itself. We have 42 agencies in Houston on file; this page shows the highest-rated 21. The agencies on this page are rated from 4.0 to 5.0 across 514 reviews; 3 have 50 or more reviews and 17 are rated 4.5 or higher. The topics that come up most in reviews of the agencies on this page are "communication" and "price". 6 are open around the clock; 12 are open on Saturdays and 9 on Sundays. The services the agencies on this page list most often on their websites are corporate investigations (2), digital forensics (2), investigations (2) and litigation support (2). 10 show a license on their websites and 1 has a BBB rating of A or A+. Domain records put 15 websites of the agencies on this page at ten or more years old; the oldest dates from 1996. 6 offer urgent consultations; 8 offer a free initial consultation and 2 are family- or locally-owned. We have a website on file for all 21 of the agencies on this page; 18 publish a contact page; 16 list a public email and 1 takes bookings online. We count these figures across the agencies on this page; hours and prices change, so confirm the details with the agency before you book.
8 of the 21 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.
