LD Products vs. Castle Ink: Honest Comparison From Someone Who Should Know (2026)

Last updated: September 25, 2026.

Quick answer: LD Products (ldproducts.com, based in Long Beach, California) and Castle Ink (castleink.com, based in Greenlawn, New York) are both long-running U.S. sellers of third-party printer ink and toner. LD Products has the bigger catalog, including refill supplies and hard-to-find cartridges. Castle Ink focuses on the most common HP, Canon, Epson and Brother cartridges, ships from the East Coast the same day on orders placed by 4 PM ET, and is run by people with 20+ years in the printer supplies business. For a common printer, either is a legitimate choice; compare the price for your exact cartridge.

Full disclosure: we're Castle Ink, so of course we want your business. But if you're searching "LD Products vs. Castle Ink," you want a straight answer, not a sales pitch. Here's our honest 2026 take, including the situations where LD Products is the better pick.

Is LD Products Legit?

Yes. LD Products is a well-established U.S. online retailer of compatible, remanufactured and name-brand ink and toner, and it also operates the 4inkjets store. It has been selling printer supplies online for about two decades and is still in business in 2026. As with any seller, check recent customer reviews and the current guarantee terms on its site before you buy.

How Do LD Products and Castle Ink Compare?

Where Is LD Products the Better Choice?

Selection breadth

LD carries a wider catalog. If you have an unusual printer (a label printer, wide-format plotter, fax machine or older business printer), LD may stock cartridges we don't. We've deliberately focused on the most common cartridges so we can stock them deeply and test them well.

Refill kits and bulk supplies

If you refill your own cartridges or run a continuous ink supply system, LD's refill supplies are broader than ours. (If you're considering refilling, read do this first so you don't clog the printhead.)

Promotions

LD runs frequent sales and coupon codes. If you're patient and price-shopping a single cartridge, a stacked promotion can sometimes beat our everyday price.

Where Is Castle Ink the Better Choice?

Faster delivery on the East Coast

Orders placed by 4 PM ET Monday–Friday ship from our New York warehouse the same business day by USPS (typically 2–5 business days), with a 1–2 day expedited option. If you're in the Northeast or Mid-Atlantic, that usually means cartridges arrive sooner.

Printer-supplies expertise

Castle Ink is run by people who've worked in the printer and imaging supplies industry for more than 20 years. We'll help you figure out which cartridge you need, and we publish hundreds of free printer guides, from ink lookups by model to the Printer Troubleshooting Center.

Simple replacements

If a cartridge doesn't work, email us with your order number and we'll make it right with a replacement or refund.

Clear product labeling

We state plainly what you're buying: our inkjet cartridges are remanufactured (genuine OEM shells cleaned, refilled and tested) and our toner is compatible (newly manufactured). Here's why that distinction matters.

What Do Both Companies Have in Common?

• Both are U.S.-based and ship from U.S. warehouses.
• Both sell third-party cartridges for HP, Canon, Epson, Brother and other major brands at a fraction of OEM prices.
• Both have been in business long enough that their compatibility listings are reliable.
• Neither will void your printer warranty; U.S. law protects your right to use third-party ink.

Which Should You Pick?

Pick LD Products if:

• You have an unusual or older printer and need a hard-to-find cartridge
• You refill your own cartridges or run a continuous ink system
• You enjoy stacking coupon codes to chase the lowest price on a single item

Pick Castle Ink if:

• You own a common HP, Canon, Epson or Brother printer (most home and small-office users)
• You're on the East Coast and want faster delivery
• You want remanufactured inkjet cartridges built on genuine OEM shells
• You'd rather have a straightforward low price than hunt for promo codes

What Are Other LD Products Alternatives?

Other common places to buy third-party ink include large online marketplaces (quality varies widely by seller), office-supply chains' store-brand remanufactured lines, and other specialist e-commerce sellers. Whoever you choose, look for clear "remanufactured" or "compatible" labeling, stated page yields, a real guarantee and a U.S. return address. Our guide to whether compatible ink is safe explains what to check.

LD Products vs. Castle Ink FAQs

Is LD Products still in business?

Yes, LD Products is operating in 2026 at ldproducts.com.

Does LD Products sell name-brand cartridges?

LD Products sells name-brand OEM cartridges as well as its own compatible and remanufactured lines. Check the product listing to see which type you're buying.

What does LD Products sell besides ink?

Toner, refill supplies, paper, labels and a range of office products.

How do the warranties compare?

Both companies back their cartridges against defects. Terms change, so read the current guarantee on each site before you order.

Is Castle Ink cheaper than LD Products?

On common cartridges, our everyday prices are usually at or below LD's regular prices; during LD promotions, theirs can be lower on some items. Compare the exact cartridge and include shipping. Our Printer Ink Price Index shows what the original cartridges cost for comparison.

The Honest Closing Pitch

If you need a common cartridge, we'll usually match or beat LD's price, ship it fast from New York, and take care of you if something goes wrong. Start by finding your printer or browse HP, Canon, Epson or Brother ink and toner. If we don't have what you need, we'll tell you, and LD probably does.