Best Ignition Interlock Devices 2026
Three major providers dominate the IID market. Here's how Intoxalock, Smart Start, and LifeSafer compare on cost, coverage, and customer service.
Best Overall
Intoxalock
Best App
Smart Start
Best Value
LifeSafer
Top IID Providers Compared
Intoxalock
Editor's Pick$70-90
per month
Pros
- Largest service network
- Frequently offers free installation
- 24/7 customer support
- Smaller, discreet device
- Easy-to-use mobile app
Cons
- Mixed customer service reviews
- Some report billing issues
Smart Start
Best App$75-95
per month
Pros
- User-friendly mobile app
- Good customer support
- Quick installation appointments
- Reliable device performance
Cons
- Fewer locations than Intoxalock
- Slightly higher average monthly cost
LifeSafer
Best Value$70-100
per month
Pros
- Competitive monthly rates
- Established reputation (30+ years)
- Reliable technology
Cons
- Fewer service locations
- Not available in all states
- Calibration often costs extra
Side-by-Side Comparison
| Feature | Intoxalock | Smart Start | LifeSafer |
|---|---|---|---|
| Service Locations | 4,500+ | 2,200+ | 1,700+ |
| State Coverage | All 50 | All 50 | 48 states |
| Monthly Cost | $70-90 | $75-95 | $70-100 |
| Installation | $0-125 | $0-200 | $50-150 |
| Calibration | Included | Included | $20-50 |
| Mobile App | ✓ | ✓ | ✓ |
| 24/7 Support | ✓ | ✓ | — |
| Camera Option | ✓ | ✓ | ✓ |
How to Choose an IID Provider
Check Service Locations
Make sure there's a service center near your home or work. You'll need to visit monthly for calibration.
Compare Total Costs
Look beyond monthly fees. Factor in installation, calibration, and potential violation fees.
Consider Support Hours
24/7 support is valuable if you have issues early morning or late night. Some providers only offer business hour support.
Check State Approval
Verify the provider is approved in your state. Your court order may specify which providers you can use.
Our Recommendation
For most users, we recommend Intoxalock due to their extensive service network and 24/7 support. If there's no Intoxalock location convenient to you, Smart Start is an excellent alternative with a great mobile app experience.
Budget-conscious users should compare quotes from all three providers—LifeSafer sometimes offers the lowest monthly rates, though you may pay more for calibration.
Head-to-Head Comparisons
Get detailed breakdowns of how specific providers compare.
IID Cost Breakdown
Full breakdown of all costs involved
Installation Guide
What to expect during installation
Sources
Provider information compiled from official company websites, customer reviews, and industry reports as of January 8, 2026.
Disclosure: This page contains affiliate links. We may earn a commission if you install an interlock device through our partners, at no additional cost to you.