10 Best Electric Knife Sharpeners

The SHARPAL 198H electric knife sharpener is a solid choice if you want a quick and easy way to sharpen most double-beveled straight edge and serrated knives. It features a three-stage sharpening system that uses durable monocrystalline diamond wheels and ceramic materials, which are effective for restoring a sharp edge without harming the blade's temper. This means your knives stay sharper for longer. One standout feature is its ability to sharpen both sides of a blade at the same time, speeding up the process and making it beginner-friendly—no special skills required.

The sharpener also offers preset speed options so you can adjust how aggressively your knives are sharpened, adding some control without complexity. Noise levels are kept low, under 65 decibels, which is noticeable but won't be disruptive in a typical kitchen. It’s fairly compact and light, making it easy to store without taking up much space. The built-in iron filing collector helps keep cleanup simple. It does not have adjustable angle guides, which some users might miss if they want more control over sharpening angles for different knives. While it’s designed for double-beveled blades and serrated knives, it may not suit specialty edges like single-beveled or very delicate knives.

The unit is well-built and backed by a 3-year warranty, adding confidence in its durability. If you want a straightforward, efficient electric sharpener for everyday kitchen knives with minimal noise and fuss, the SHARPAL 198H should serve you well.

The Kyocera DS-38 electric knife sharpener is designed to make sharpening knives easy and consistent. It uses an industrial diamond whetstone, which is strong enough to sharpen not only metal knives (like stainless steel and titanium steel) but also ceramic knives, including Kyocera's own ceramic range. This is a real plus if you have a mix of knife types at home. The device features a guide slot that keeps the sharpening angle steady, helping you achieve good results without guesswork. It has a simple pull-forward action to sharpen, which is straightforward and user-friendly.

Size-wise, it’s compact and lightweight (about 10cm x 8cm x 23cm and 260g), making it easy to store and handle in the kitchen. The safety switch requires you to push and hold it on while sharpening, reducing the risk of accidental operation. The sharpener runs on 4 AA batteries, which are sold separately, so you need to keep that in mind. One limitation is it has only one sharpening stage with fine grit, so it may not be ideal for restoring very dull or damaged blades that need coarse sharpening first. Also, some users might prefer a corded option for continuous power rather than using batteries.

This Kyocera model is a practical choice for home cooks wanting an easy-to-use, safe sharpener that handles various knife types including ceramic.

The GRAEF CC120 electric knife sharpener offers a three-stage sharpening process that uses diamond-coated disks for the first two stages and a stropping polishing disk in the third. This combination is excellent for restoring and maintaining very sharp edges on both straight and serrated knives, making it a versatile choice for kitchen, hunting, and even commercial use. Its high precision elastomeric angle guides help you sharpen knives at the perfect 20° angle without guessing, which is very helpful if you’re not experienced in sharpening. The diamond abrasive material is known for its durability and effectiveness, ensuring long-lasting sharpness.

Weighing just over 2 kg and measuring 25 by 11 by 11 cm, it’s compact enough to fit comfortably on a countertop, though it doesn’t have specialized storage features. With its 75-watt power, it runs efficiently without being too loud or power-hungry. On the downside, it's designed mainly for knives with a 20° blade angle, so knives with very different angles might not sharpen as well. While the product is easy to use and safe thanks to guided slots and a solid design, it might require some practice to get used to the three-stage process for best results.

This sharpener represents a solid choice for anyone wanting a reliable, user-friendly tool to keep a variety of knives ultra-sharp without the hassle of manual sharpening.