The 8 Best Smart Card Readers
Updated by · How we research
Working from home with a CAC or PIV card takes a reader. Eight compared by plug, size, Mac support and durability; the Identiv SCR3310v2 leads. When users buy our independently chosen editorial selections, we may earn commissions to help fund the Wiki.
Owners keep reporting broken hinges on folding smart card readers, so a cabled reader is the safer bet for a desk. Desk or pocket, each is a small USB device that lets a computer talk to the chip on an ID or bank card, and most buyers use one to log in with a military CAC or federal PIV card from home.
Editor's Notes
October 19, 2026, by Ezvid Wiki Admin:
Three of the seven old picks had to go, and one, the Rocketek SCR10, wouldn't read CACs at all, an independent CAC help site reports. The Rocketek and the Daoker SCR653C are no longer available. The Dell SK-3205 keyboard is down to old stock at a steep price, with drivers listed only for Windows versions from the 2000s. We also dropped the two iPhone and iPad readers from the honors, since we couldn't confirm either is still made.
The Identiv SCR3310v2 takes over first place. It's cheap, cabled, well documented and the reader that MilitaryCAC recommends. The IOGEAR GSR205 stays for USB-C laptops and federal buyers, and the HID OMNIKEY 3121 and Identiv SCR3500 Smartfold stay too.
New are the Identiv SCR3500C, a folding USB-C reader, the ACS ACR39U-NF, the smallest stick we found, and two budget desk readers, the Saicoo USB CAC Reader and the Zoweetek USB CAC Reader.
The list stops at eight on purpose. Past these, the field is mostly look-alike generic readers with no documents behind them. A heads-up on folding readers: owners keep reporting broken hinges, so if your reader lives on a desk, a cabled one is the safer bet.
March 30, 2021:
On its fundamental level, CAC smart card technology has not changed in years, and it almost certainly won't change significantly anytime soon. For that reason, the only recent change to this Wiki was the removal of the Gemalto IDBridge, which is now difficult to find and offers no tangible benefits compared to other options. Given their simplicity, these devices come down mostly to dependability, which all of our recommendations offer, and USA-sourced materials. That last part is important to many governmental offices and contractors, and as such, those institutions should look to the IOgear GSR205 for an American-made security solution.
Some of these models also support EMV payment processing, however, if you need to accept payments on a regular basis, we high recommend getting a dedicated credit card reader. For contactless smart cards that have more highly-powered RF circuits inside them, you'll need a specialized proximity card reader.
February 14, 2020:
There's not a ton differentiating these from each other, but you'll still need to make sure you get the right one. Right off the bat, the IOgear GSR205 is one of the best choices because, unlike many, it's compliant with TAA regulations that require many government offices to use devices produced mainly in the USA. The Identiv SCR3500 Smartfold and Identiv SCR-3310 are also excellent options made by one of the leaders in secure access components. There's also the Daoker SCR653C, which, like the IOgear, has a USB-C connector for use with modern smartphones and notebook computers. The Daoker has the added benefit of built-in SD card readers, as does the Rocketek SCR10, which also happens to be among the most compact.
If portability isn't your primary concern, check out the HID Omnikey, which is highly reliable but slightly bulkier than others. And if you definitely don't need to take it anywhere, the Dell SK-3205 keyboard features a permanently integrated reader.
Also note that these products are not designed to take payment cards or communicate with NFC devices. To do those, you'll need a credit card reader or proximity card reader
Match The Plug And The Shape To How You Work
Flat desk readers and upright stands are the sturdiest, since nothing moves except the card.
Start with the port. Many current laptops, including every recent MacBook, have only USB-C, while older office PCs are mostly USB-A. A reader on a cable, like the Identiv SCR3310v2 with its 1.5-meter lead, works fine through a cheap USB-C adapter, because the adapter just sits at the laptop end. A reader that plugs in directly is different: on an adapter it becomes a long lever hanging off the port, and one bump can break the reader or the port. If your laptop is USB-C only and you want a pocket reader, buy one with a USB-C plug, such as the ACS ACR39U-NF, which ACS rates for 100,000 card insertions.
Then decide between desk and travel. Flat desk readers and upright stands are the sturdiest, since nothing moves except the card. Folding pocket readers save space, but owner reports across folding models point to the hinge as the part that fails first. Upright readers keep the card in view, which helps if you tend to walk away with it still inserted. Finally, if you buy for a federal office, check whether the purchase must be TAA compliant; IOGEAR lists the GSR205 as compliant.
Drivers, Macs And Newer CAC Cards
Almost every reader in this class uses the USB CCID standard, so the computer talks to it with a driver it already has. Identiv's manual says no installation is needed where a CCID driver comes preinstalled, which covers Windows and current macOS. On Linux, install the PC/SC daemon and the free CCID driver from your distribution's packages. MilitaryCAC says macOS 10.15 and later has smart card support built in and tells Mac users not to disable it (MilitaryCAC). Some offices and websites still require middleware such as ActivClient, which is about the software your agency uses, not the reader.
Age matters more than people expect. Newer CACs use chips that some older readers can't read. MilitaryCAC reports that IOGEAR GSR202 and GSR203 readers made before May 2019, some Identiv units with firmware older than 6.02 on recent Macs, and the ACS ACR39U-N1 won't read the G+D SCE 7.0 and DLGX4 cards. That's a good reason to buy a new reader from a known seller instead of a used one. If a reader seems dead, first check that the card is inserted chip-side toward the contacts; MilitaryCAC notes that's easy to get wrong on folding readers (MilitaryCAC).
Contact, Contactless And What A Reader Can't Do
A CAC, a PIV card and a bank chip card all use contact chips that follow the ISO 7816 standard, and every reader on this list is a contact reader. Contactless readers, such as Identiv's uTrust 3700 F, read tap-style badges that follow ISO 14443, but they can't read the contact chip on a CAC. Office badge readers and proximity readers are a separate category with their own software.
An EMV Level 1 approval means the reader's contacts meet the bank-card hardware standard. It doesn't turn the reader into a payment terminal; taking card payments needs a merchant's card terminal and account. Combo readers with SD and SIM slots exist, but the ones that used to be sold widely are now unavailable or drew poor compatibility reports. The reader itself holds no secrets, since the card does the cryptography, so keep your card with you, never share your PIN, and follow your command's or agency's rules on which computers you may use it with. We found no recalls for any brand here in the Consumer Product Safety Commission database.
How we researched this
We screened more than 30 smart card reader listings, compared 16 readers in detail and read the makers' manuals or spec sheets for the finalists where they exist. We checked each reader against the independent MilitaryCAC compatibility lists, analyzed patterns in owner feedback, and searched the U.S. Consumer Product Safety Commission database for recalls. We found no independent lab tests of these readers.
Frequently asked questions
What is a smart card reader?
It's a small USB device that powers the chip on an ID or bank card and passes it to software on your computer. Most people buy one to log in with a military CAC or federal PIV card from home.
Do I need drivers for a CAC reader?
Usually not. Most readers use the standard CCID driver built into Windows and current macOS. Linux needs the free PC/SC and CCID packages. Your agency may still require middleware for some websites.
Will a smart card reader work on a Mac?
Most do. MilitaryCAC lists the Identiv SCR3310v2, Identiv SCR3500C and Saicoo readers as Mac friendly. Apple built smart card support into macOS 10.15 and later.
Should I get a USB-A or USB-C reader?
Match your laptop. A cabled USB-A reader works fine with a USB-C adapter, but a reader that plugs in directly should match the port, or it will stick out and break easily.
Can a smart card reader take credit card payments?
No. Some readers meet the bank-card hardware standard, but taking payments needs a merchant terminal and account.
Why won't my reader read my new CAC?
Older readers and firmware may not read newer CAC chips, per MilitaryCAC. Check that the chip faces the contacts, then try a new reader with current firmware.
