If you've been researching custom night guards online, you've probably come across both Sentinel Mouthguards and Remi. Both companies manufacture custom-fit night guards in the United States and provide a convenient at-home impression process, making them affordable alternatives to traditional dentist-made appliances.
So which one is right for you?
The answer depends on what's most important to you. Some people prioritize fast turnaround times. Others want complete transparency about materials, longer product warranties, or specialized options for daytime clenching.
This guide compares both companies side-by-side to help you decide.
Quick Comparison
| Feature | Sentinel Mouthguards | Remi |
|---|---|---|
| Founded | 2012 | 2019 |
| Manufacturing | In-house FDA-registered U.S. laboratory | In-house FDA-registered U.S. laboratory |
| Turnaround Time | 3–5 business days | Approximately 10–14 days after impressions arrive (Rush service available) |
| Satisfaction Guarantee | 100 Days | 45-Night Perfect Fit Guarantee |
| Product Warranty | Soft: 6 months Hard & Dual: 1 year | Fit guarantee publicly stated; no separate long-term product warranty found |
| Digital STL Scans | ✔ | ✔ |
| Material Transparency | Exact materials disclosed | General dental-grade material description |
| Daytime Clenching Guard | ✔ No-Show Day Guard | Not currently offered |
| Tongue & Cheek Biting Guard | ✔ | Not currently offered |
| Whitening Trays | ✔ | ✔ |
What Both Companies Do Well
Before discussing the differences, it's worth mentioning what these companies have in common.
Both companies:
- Manufacture custom-fit guards instead of boil-and-bite appliances
- Accept at-home dental impressions
- Manufacture guards in the United States
- Accept HSA/FSA payments
- Offer digital ordering without visiting a dentist
- Provide customer support during the impression process
For most people, either company will provide a much better experience than an over-the-counter night guard.
Materials: Why Transparency Matters
One of the biggest differences between custom night guard companies isn't visible at all.
It's what the guard is actually made from.
Sentinel believes customers deserve to know exactly which materials are going into their mouths every night.
For that reason, we openly disclose the materials used to manufacture our guards, including:
- Keystone Pro-Form Splint (Hard Guards)
- Keystone Pro-Form NiteGuard EVA (Soft Guards)
We also disclose that our appliances are:
- BPA-Free
- BPS-Free
- Phthalate-Free
- PVC-Free
- MMA-Free
- Acrylic-Free
- Latex-Free
- Silicone-Free
- Resin-Free
Remi also provides extensive safety information and states that its guards are made from patented FDA-cleared dental-grade polymer that is BPA-free, phthalate-free, acrylic-free, latex-free, gluten-free, silicone-free, and methyl methacrylate-free. However, it does not publicly identify the specific material or manufacturer used.
Neither approach is necessarily right or wrong, but if knowing the exact materials used in your appliance is important to you, Sentinel provides more detailed information.
Both Sentinel Mouthguards and Remi manufacture custom over-the-counter night guards intended to help protect teeth from the effects of bruxism. These products fall under the FDA's Product Code OBR classification for over-the-counter mouthguards. FDA Product Code OBR Classification
Turnaround Time
If you're replacing a broken guard, production time can matter.
Sentinel Mouthguards
Most custom guards are manufactured and shipped within 3–5 business days after receiving acceptable impressions.
Remi
Remi states that standard production takes approximately 10–14 days after impressions arrive at their lab. They also offer an optional Rush Lab service that shortens production to approximately two business days for an additional cost.
Warranty and Fit Guarantee
Many shoppers confuse a fit guarantee with a product warranty, but they're actually different.
A fit guarantee protects you if the appliance doesn't fit properly when you first receive it.
A product warranty protects you after you've begun wearing it.
Sentinel Mouthguards
- 100-Day Satisfaction Guarantee
- Soft Night Guard Warranty: 6 months
- Hard Night Guard Warranty: 1 year
- Dual Laminated Guard Warranty: 1 year
Remi
Remi offers a 45-Night Perfect Fit Guarantee, which covers the initial fit of the appliance. We could not find a separate publicly stated long-term product warranty for wear after that initial period.
Product Selection
This is one of the biggest differences between the two companies.
Sentinel offers:
- Soft Night Guards
- Hard Night Guards
- Hybrid Guards
- No-Show Day Guards
- Tongue & Cheek Biting Guards
- Sports Mouth Guards
- Retainers
- Whitening Trays
Remi currently offers:
- Custom Night Guards
- Retainers
- Whitening Trays
If you're simply looking for a traditional night guard, either company may meet your needs.
If you're looking for specialty appliances, Sentinel currently offers more options.
Sentinel vs. Remi at a Glance
Choose Sentinel Mouthguards if you:
✔ Want your guard made in 3–5 business days
✔ Prefer complete transparency about materials
✔ Want longer warranty protection after purchase
✔ Need specialty products like a No-Show Day Guard or Tongue & Cheek Biting Guard
✔ Already have a digital STL scan from your dentist
Choose Remi if you:
✔ Prefer a subscription replacement option
✔ Want guided video assistance during the impression process
✔ Are looking for a straightforward custom night guard with fewer product choices
A Unique Option: The No-Show Day Guard
Many people don't only grind at night.
Stress-related daytime clenching has become increasingly common, especially for people working at computers or under chronic stress.
Sentinel developed the No-Show Day Guard specifically for this situation.
Unlike a traditional full-coverage night guard, it has a low-profile front design intended to be significantly less noticeable while talking, working, or meeting with clients.
At the time of writing, we could not find a comparable daytime clenching appliance on Remi's website.
Customer Support
Both companies emphasize customer support throughout the impression process.
Sentinel provides personalized assistance, including impression reviews before manufacturing when requested.
Remi offers white-glove support and complimentary one-on-one video walkthroughs with dental professionals to help customers take accurate impressions.
Which Company Should You Choose?
Choose Sentinel Mouthguards if you:
- Want faster standard production times
- Value complete material transparency
- Prefer longer product warranty coverage
- Need a specialty appliance like a No-Show Day Guard
- Want a broader selection of custom dental appliances
Choose Remi if you:
- Prefer their subscription replacement program
- Like their impression support model
- Want a traditional custom night guard with a streamlined online experience
Final Thoughts
Both Sentinel Mouthguards and Remi have helped make custom night guards more accessible by eliminating the need for an in-office dental appointment.
The right choice depends on your priorities.
If your priorities are fast production, long-term warranty protection, complete transparency about materials, and access to specialized products like the No-Show Day Guard, Sentinel offers several meaningful advantages.
If you're looking for a straightforward custom night guard backed by an established subscription replacement program and an in-house U.S. lab, Remi is also a strong option.
Disclosure
This comparison was written by Sentinel Mouthguards using publicly available information from each company's website as of the publication date. Product offerings, warranties, turnaround times, and policies may change over time. We encourage readers to verify current information directly with each manufacturer before making a purchasing decision.
Continue Your Research
Choosing the right night guard is just one part of protecting your smile. If you'd like to learn more about fit, materials, and long-term care, these guides can help:
How Tight Should a Night Guard Be?
A properly fitting night guard should feel secure without causing excessive pain or pressure. Learn what a normal fit feels like, when tightness is expected, and when adjustments may be needed.
→ Read: How Tight Should a Night Guard Be?
Soft vs. Hard Night Guards: Which Is Right for You?
Not all night guards are made the same. Compare soft, hard, and dual laminated materials to understand which option is best for your level of teeth grinding and jaw clenching.
→ Read: Soft vs. Hard Night Guards
When Should You Replace Your Night Guard?
Even high-quality custom night guards eventually wear out. Discover the most common signs that it's time for a replacement and how to extend the life of your appliance.