If you've searched for a Faraday bag, you've probably run into Mission Darkness, GoDark, and SLNT — three well-known signal-blocking brands, alongside us. This guide compares real, current prices and specs across all four, sourced directly from each brand's own product pages, so you can see where each one actually stands rather than take anyone's marketing at face value.
Compare each brand in depth: Mission Darkness alternative · GoDark alternative · SLNT alternative
Competitor prices and specs were checked directly against each brand's official site on July 17, 2026; ours were updated September 24, 2026. Pricing changes — always confirm on the brand's own site before buying.
Who's Who
- Mission Darkness (mosequipment.com) — founded 2015, USA-assembled, originally built for digital forensics and law enforcement. Wide catalog from small pouches to forensic enclosures.
- GoDark (godarkbags.com) — a Kickstarter-origin brand focused on rugged, outdoor-styled bags with 600D poly shells.
- SLNT (slnt.com) — the "Silent Pocket" brand, known for a broad lifestyle range (backpacks, wallets, apparel) built around their Multishield® lining.
- The Faraday Bag (us) — signal-blocking bags and leather key-fob pouches. Our published test pack covers an SGS fire test on our leather, SGS Prop 65 chemical testing on the fiberglass bag materials, and a lab shielding test of our conductive fabric.
Phone Faraday Bags: Price Comparison
| Brand | Entry phone bag price | Fireproof stated? | Waterproof stated? |
|---|---|---|---|
| The Faraday Bag | $14.99 phone bag — out of stock now; $25.95 phone-size pouch in stock | Yes (fiberglass shell) | Yes |
| Mission Darkness | $23 (Non-Window Faraday Bag) | Not stated | Not stated |
| SLNT | $44.95 (Waterproof Faraday Phone Bag) | Not stated | Yes |
| GoDark | $60.00 | Not stated | Water & puncture resistant |
Our $14.99 phone bag is the least expensive entry bag of the four — but it's out of stock right now. The phone-size pouch we do have in stock is $25.95, a little above Mission Darkness's $23 entry bag. Either way, ours is the only entry option of the four with a fire-resistant fiberglass shell stated on the product page.
Key Fob Faraday Bags: Price Comparison
| Brand | Price | Material / format |
|---|---|---|
| Mission Darkness | $15 for a 2-pack (~$7.50 each) | Water-resistant ballistic nylon pouch |
| The Faraday Bag | $15.99 single / $29.99 2-pack | Handcrafted genuine leather pouch |
| SLNT | $21.95 | 500D weatherproof polyester pouch |
| GoDark Vault | $49–$56 | Rigid aluminum case with magnetic hinge (a different product category — a hard case, not a soft pouch) |
Here it's a mixed picture, and we'll say so plainly: Mission Darkness's utility 2-pack is the cheapest per-unit key fob option of the four. Ours sits in the middle, priced for a genuine leather pouch rather than nylon — if bare lowest cost is your only priority, their 2-pack wins on price. If you want leather instead of nylon, ours is built for that.
Shielding Certifications: The Honest Part
This is the section most comparison pages skip, and it matters. Mission Darkness, GoDark, and SLNT each publish a specific, named lab certification for their shielding fabric on their product pages:
- Mission Darkness cites MIL-STD-188-125 and IEEE 299-2006 testing for their TitanRF fabric.
- GoDark cites independent lab testing exceeding 100 dB of attenuation and MIL-STD-188-125-2 compliance.
- SLNT cites MIL-STD-188-125-2 compliance with a stated 100,000:1 signal reduction ratio.
Here is exactly what we can show, and where it stops. Our test pack (PDF) includes a shielding-effectiveness test of our conductive fabric by the Beijing Institute of Radio Metrology & Measurement (CASIC 203, method GJB 6190-2008): 67–72 dB across 10 MHz–1.5 GHz.
Two limits matter. It tests a fabric sample, not a finished, sealed bag — and seams and closures are where real bags leak. And it stops at 1.5 GHz, below Wi-Fi (2.4/5 GHz), Bluetooth and many cellular bands, so it says nothing about those frequencies.
On fire: SGS glow-wire tested our leather pouch material at 500°C (no ignition over 60 seconds). Our fiberglass bag materials were SGS-tested for Prop 65 chemicals (lead, cadmium, phthalates: pass) — a chemical test, not a fire test.
If a finished-product RF test across Wi-Fi and cellular bands is your deciding factor, the other three brands publish broader tests than ours today, and we'd rather tell you that than dodge the question.
So Which Should You Buy?
- Cheapest phone bag with a fire-resistant shell: ours — $14.99 when in stock; right now our in-stock phone-size option is the $25.95 pouch.
- Cheapest key fob pouch, no leather preference: Mission Darkness's 2-pack.
- Want a finished-bag RF test across Wi-Fi and cellular bands: Mission Darkness, GoDark or SLNT. Ours is a fabric-level lab test up to 1.5 GHz.
- Want a leather key-fob pouch instead of nylon or polyester: ours.
- Want a rigid hard-case vault instead of a soft pouch: GoDark's Vault is the only hard case of the four here.
All four brands make signal-blocking products built around the same basic Faraday-cage principle — the differences come down to price, material, and which specific certification each one has bothered to test and publish. Browse our own Faraday bags and key fob protectors to compare against what you've read here.
