Popular Cities
2 of these agencies are based in Allen; the others serve Allen from towns including Dallas (22 mi), McKinney (6 mi) and Plano (6 mi).
6 open 24/7 · 12 open weekends · 20 rated 4.5+ · 10 show a license
Data verified October 21, 2026
The 24 agencies on this page are the private investigators listed for Allen, 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.
The 24 agencies on this page are rated from 3.8 to 5.0 across 383 reviews; 2 have 50 or more reviews and 20 are rated 4.5 or higher. When clients rate these agencies on specific qualities, they most often praise professionalism (100%), quality (75%) and responsiveness (70%). 6 are open around the clock; 12 are open on Saturdays and 7 on Sundays. 10 show a license on their websites and 3 have a BBB rating of A or A+. 12 have ten or more years of experience, the longest 27 years. 6 offer urgent consultations; 4 offer a free initial consultation and 2 are family- or locally-owned. We have a website on file for all 24 of the agencies on this page; 19 publish a contact page; 16 list a public email and 1 takes bookings online. 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.
2 of the 24 agencies have an address in Allen. The others come from other towns. Investigators travel to the subject, so an office one county over is rarely the issue. State licensing is the thing to check.
