Regional Provider Comparison
RoadGuard vs Intoxalock: Which IID Is Better in TX, OH & TN?
For drivers in Texas, Ohio, and Tennessee, RoadGuard wins on cost, rating, and customer service. Here's the full breakdown.
Winner for TX/OH/TN
RoadGuard Interlock
RoadGuard beats Intoxalock in these three states on rating, monthly cost, installation price, and customer satisfaction. Intoxalock's advantage is nationwide coverage — useful only if you relocate.
At a Glance
RoadGuard Interlock
Winner4.2/5 rating
200+ TX/OH/TN locations
$65-85/month
- Lower monthly cost and installation
- Higher customer satisfaction rating
- Regional expertise in TX, OH, TN
Intoxalock
Runner-up3.8/5 rating
3,000+ national locations
$80-100/month
- Available nationwide (good if relocating)
- Higher monthly cost and installation fees
- More customer service complaints
Feature-by-Feature Comparison
| Feature | RoadGuard | Intoxalock |
|---|---|---|
| Regional Coverage | TX, OH, TN | All 50 states |
| Monthly Cost | $65-85 | $80-100 |
| Installation | $0-75 | $75-150 |
| Customer Rating | 4.2/5 | 3.8/5 |
| Customer Service | Reliable | Mixed reviews |
| Cancellation Fees | Low | Reported high |
| Regional Expertise | TX/OH/TN specialist | General |
| Calibration | Included | Included |
| 24/7 Support | 24/7 | 24/7 (mixed reviews) |
Cost Comparison
| Cost Type | RoadGuard | Intoxalock |
|---|---|---|
| Installation | $0-75 | $75-150 |
| Monthly Lease | $65-85 | $80-100 |
| Calibration | Included | Included |
| 12-Month Estimate | $840-1,095 | $1,035-1,350 |
Edge: RoadGuard — typically $150-250 cheaper per year in TX, OH, and TN.
The Bottom Line
Choose RoadGuard if:
- You're staying in Texas, Ohio, or Tennessee for your full requirement period
- You want to save money on monthly fees and installation
- You prefer a regional specialist over a large national chain
Choose Intoxalock if:
- You plan to relocate outside TX, OH, or TN
- No RoadGuard location is convenient to you
Other Comparisons
Sources
Comparison based on provider websites, state DMV data, and customer reviews as of March 2026.Last updated: March 20, 2026
- 01Texas DPS - Ignition Interlock (Regulatory Services Division)dps.texas.gov · Texas vendor standards and device approval
- 02Texas DPS - Approved Ignition Interlock Devices (PDF)dps.texas.gov · Texas approved device models, including Intoxalock
- 03Intoxalock - Ignition Interlock Cost in Texasintoxalock.com · Intoxalock monthly pricing in Texas
- 04Ohio Adm.Code 4501-45-04 - Certification requirements for ignition interlock devicescodes.ohio.gov · Ohio device certification and monitoring rules
- 05Tennessee Department of Safety - Ignition Interlocktn.gov · Tennessee interlock program and provider search
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