The Razer Viper Ultimate is an amazing gaming mouse that's very versatile and handles anything you throw at it. Its performance is amazing and the latency, either when used wired or wirelessly, is extremely low. It has an ambidextrous design with two side buttons on each side, giving you plenty of programmable options. Its smaller size lends itself well to the fingertip grip, but small and medium-sized hands will find it comfortable for a palm grip and claw grip. Larger hands can use a claw grip, but fingers might go past the two main click buttons when using the palm grip. This mouse also comes with a unique charging station that also acts as a receiver range extender for better performance.
Great for office. This mouse has amazing ergonomics and is well-built. It's also a wireless mouse, meaning you don't have a cable cluttering your desk. Also, it has a good amount of programmable buttons, making software or browser work easier and more convenient.
Excellent for FPS games. The click latency, when wired or wireless, is amazing and even most competitive gamers won't notice any delay. It's also quite light, even for a mouse without a honeycomb pattern. Its performance is excellent and it's very accurate and consistent when moved at fast speed. Most people should find the mouse comfortable in a fingertip grip, but only larger hands might have some issues with a palm or claw grip. The mouse offers multiple customizable buttons, with two side buttons on each side.
Great for MMO games. The mouse has a good amount of programmable buttons, although not as much as some dedicated MMO mice which have a full side panel with easily nine or more side buttons. Nevertheless, this mouse has amazing performance and customization options. Its shape and size is better suited for fingertip grip for everyone, and is only awkward to grip with a palm or claw grip if you have very large hands.
Excellent for ultra-light gaming. If you're looking for a very light mouse that doesn't have a typical honeycomb pattern design, this is a great option. It's lightweight, well-built, and has amazing performance which you can customize to your preference in the software. The latency, even wireless, is amazing and the mouse feels very responsive.
Good for traveling. This mouse isn't too tall and should fit in some laptop cases. It also has a built-in receiver slot, so you don't need to carry around its cable, making it great for working in tight spaces like on a plane.
The Razer Viper Ultimate has a fairly aggressive style but with a nice high-end gaming feel to it. The logo at the back is RGB-lit. It has an ambidextrous design with a low back. The mouse comes with a proprietary charging cradle that's also RGB-lit at its base. You can either set the logo and the base to have the same lighting or individually assign them inside the software.
The Razer Viper Ultimate is quite portable thanks to its design. It isn't too high so you'll be able to toss it in a laptop bag without too much trouble. It also has a receiver storing slot under the mouse, so it's quite easy to bring around without having the clutter of a cable.
Without its cable, the Razer Viper Ultimate is very light. It's one of the lightest wireless mice we've reviewed. It compares itself easily to more traditional ultra-light gaming mice like the Glorious Model O, but without having a honeycomb pattern design.
Update 11/20/2020: The left and right buttons squeak when you press them all the way down. We reduced the build quality score from 8.5 to 8 because of it.
The Razer Viper Ultimate's build quality is great. Although it's entirely made out of plastic and it feels lightweight, the mouse feels durable and well-built. There's no wobble or gaps, but the left and right buttons squeak when you press them all the way down. The feet glide very well and the clicks feel slightly different than what you get on most mice, which is probably due to the optical switches.
The Razer Viper Ultimate's ergonomics are excellent. This is a true ambidextrous design with two side buttons on each side of the mouse. These buttons are also slightly further back on the mouse, which makes them more reachable than the G-Wolves Hati or the Glorious Model O. Since it doesn't have a high back, it's great for a fingertip grip, although it's not the best for bigger hands to use with a palm grip. If you prefer a right-slanted design rather than an ambidextrous one, check out the Razer Basilisk Ultimate, or the Basilisk X Hyperspeed for a cheaper alternative.
Due to its low-back design and fairly short body, the Razer Viper Ultimate is better suited for small and medium hands for a palm grip. People with larger hands won't feel as comfortable and your fingers might go past the two main click buttons.
With a claw grip, only people with extra large hands find the mouse to be too small. When curling up your fingers, even large hands should feel comfortable controlling this mouse.
The design of the Razer Viper Ultimate lends itself very well to the fingertip grip. Most people, other than some with very small hands, should have nice control over the mouse using this grip.
The Razer Viper Ultimate comes with a dedicated USB receiver to connect to your PC wirelessly. You can either put it inside the cradle, which acts as an extender, or plug it in directly in your PC. The dock can also give you information regarding your mouse battery.
The cable of the Razer Viper Ultimate is such an improvement over other Razer products. It feels very similar to the cable of the Glorious Model O. It's light, doesn't hold as many kinks, and feels better-made. It doesn't create any drag when moving the mouse around, which is great. If you don't want a charging cradle and would simply want this mouse in a wired design, check out the Razer Viper.
Update 10/01/2020: Fixed an error with the number of programmable inputs. We didn't count for the extra layer of inputs you get with the HyperShift button.
You can reprogram every button on the Razer Viper Ultimate to whatever you like, even the scroll up and down. You can even reassign the left click, but as long as the left click action is assigned to another button. You can also set a HyperShift button, which enables another layer of programmable inputs on the mouse, increasing your customization.
The scroll wheel of the Razer Viper Ultimate is pretty standard from other gaming mice and doesn't offer anything different. Its incremented design offers great feedback, but isn't very useful for fast scrolling through long documents.
The click latency, both wired and wireless, of the Razer Viper Ultimate is quite impressive. Even most competitive gamers won't notice any delay when playing.
The Razer Synapse 3 software is very good. You can easily customize most aspects of the mouse, and can save your settings on the mouse's onboard memory, meaning you won't have to download the software on another computer when using the mouse. It's unfortunately not available on macOS, and if you prefer something whose software is available on it, then check out the Logitech G903 HERO.
Although it's fully compatible with Windows, there are some buttons that won't work on macOS. When setting the mouse in 'right-handed mode' on Mac, the right side buttons won't work. Also, the rest of the buttons are set to their default settings, and can't be changed.
The Razer Viper Ultimate is an amazing wireless gaming mouse. It comes with a unique charging dock and offers amazingly low latency, both wired and wireless, which is quite impressive. It has superb performance and has two side buttons on both sides of the mouse. However, its software isn't compatible with macOS, while the Logitech G Pro Wireless is, which is its main competitor. See our recommendations for the best wireless gaming mouse, the best wireless mouse, and the best FPS mouse. If you're interested in Razer products, also check out the best Razer mice.
The Razer Viper Ultimate is a slightly better mouse than the Logitech G Pro Wireless. It has a few more programmable buttons and its cable, when used wired, is noticeably lighter and less cumbersome. The design of the Razer is also more ergonomic. On the other hand, the G Pro Wireless is a bit more versatile since it is fully compatible with macOS, which the Viper Ultimate isn't.
The Razer Viper Ultimate and the Razer DeathAdder V2 are similarly performing mice for FPS gaming. The Viper Ultimate is wireless and a little bit lighter, while the V2 is wired. The Viper Ultimate's click latency is excellent, and almost as low as the V2, even when used wirelessly. The V2 is a better mouse for palm grip, as it's suitable for every hand size with this grip type, while the Viper Ultimate is better in fingertip grip for those with larger hands.
The Razer Viper Ultimate and the Razer Basilisk Ultimate are very similar gaming mice. They're both basically the same mice internally, but have a different shape and design to them. The Basilisk Ultimate is a right-handed mouse with a thumb rest and has an additional sniper button on the left side. While the Viper Ultimate isn't recommended with all grip types for larger hands, the Basilisk Ultimate can be used comfortably with all grip types with anyone except those with very small hands.
The Glorious Model O and the Razer Viper Ultimate are both great ultra-light gaming mice. The Model O is a bit lighter thanks to its honeycomb design, but the Viper Ultimate is impressively lightweight considering it's a wireless mouse. If you have small hands, you may find the Model O a little bit too large, while the Viper Ultimate may be more comfortable. Both have impressively low latency, and a wide adjustable CPI range.
The Razer Viper Ultimate is a better gaming mouse than the Razer DeathAdder Elite. Its wireless design gets rid of the clutter of a cable and it's also noticeably lighter. Its click latency is also lower, and when used wired, its cable is lighter than the DeathAdder's. On the other hand, the DeathAdder has a right-slanted design and is slightly better for people with larger hands.
The Razer Viper Ultimate is a noticeably better performing mouse than the wired Logitech G502 HERO. The Razer is better for a fingertip grip and glides very well. Its wireless design and low weight make it a great mouse for FPS games. It's very comfortable to use, but people with larger hands might prefer the Logitech, especially with a palm grip.
The Razer Viper Ultimate is a slightly better gaming mouse than the Razer Viper Mini. The Mini is wired-only, while the Ultimate can be used wired or wireless. The Ultimate is slightly more comfortable due to its larger size, has more programmable buttons, and has a wider and more adjustable CPI range. While the Ultimate may be better for people with larger hands, smaller hands will likely get a better grip with the Mini, especially if using a fingertip grip.
The Razer Viper Ultimate is a better mouse than the Logitech G502 LIGHTSPEED, especially if you play FPS games. The Razer is lighter and its shape is better suited for a fingertip grip, while the G502 is very big, heavy, and better suited for a palm grip user. Also, the Logitech has an unlockable wheel and a sniper button while the Razer has two side buttons on each side of its body.
The Razer DeathAdder V2 Pro and the Razer Viper Ultimate are very similar performance-wise. The main difference is that the V2 Pro is a right-handed mouse, while the Viper Ultimate is fully ambidextrous. The Viper Ultimate is lighter; however, the V2 Pro has Bluetooth capability and a multi-device pairing feature.
The Razer Mamba Elite is a wired gaming mouse, while the Razer Viper Ultimate is wireless. Both mice are fairly lightweight, though the Viper Ultimate is lighter. The Viper Ultimate is most recommended for people with small or medium hands and those with very large hands will likely only find the Viper Ultimate comfortable in fingertip grip, while the Mamba Elite can be used in all grip types by all hand sizes, except claw and fingertip grip with small hands. Both mice have low latency, a very wide CPI range, and two additional side buttons.
The Razer Viper Ultimate is a better overall gaming mouse than the Logitech G903 LIGHTSPEED. It's lighter, more comfortable to use (especially if you prefer the fingertip grip), and its sensor is amazing. It comes with a nice RGB charging station. The Razer also has optical switches according to the manufacturer. On the other hand, the Logitech is a bit more versatile, thanks to its wheel unlock button and the fact that it's fully compatible with macOS.
The Razer Viper Ultimate is a bit better than the Logitech G703 LIGHTSPEED Wireless Gaming Mouse with HERO Sensor. The Razer is lighter, more comfortable to use, and it has more programmable inputs. However, the G703 has a lower CPI error and software support for macOS.
The Razer Viper and Viper Ultimate are nearly identical. The Viper Ultimate is wireless, while the Viper is wired-only. The Viper is actually a few grams lighter than the Ultimate, but other than that, they are pretty much the same. You get a nice RGB charging cradle with the wireless Viper Ultimate and the cable is a bit more flexible.
The Zowie S2 is a very different mouse than the Razer Viper Ultimate. The S2 is a wired mouse and it has a higher back hump, which might be better for claw grip users. On the other hand, the Viper Ultimate is wireless, slightly lighter, and feels more high-end. If you were to use the Razer wired, its cable is better than the Zowie's. It also has RGB lighting that can be customized inside its software.
The Razer Viper Ultimate is a better gaming mouse than the SteelSeries Rival 3 Wireless. The Razer is more comfortable, has more precise CPI adjustment steps, and it has side buttons on both sides of the mouse, unlike the SteelSeries that only has them on the left side. However, the SteelSeries has Bluetooth, a slightly more accurate sensor, and is fully compatible with macOS, unlike the Razer.
The Razer Viper Ultimate is a better gaming mouse than the Corsair HARPOON RGB Wireless. The Viper is larger but lighter and is much more comfortable and durable feeling. Both mice are only suitable for palm grip with small or medium hands, and while the Corsair can be used by all hand sizes with claw grip, people with extra-large hands will only get a comfortable grip of the Viper when using fingertip grip. The Viper has a much wider and more adjustable CPI range, though the sensor on the Corsair is more accurate. The Viper Ultimate has more programmable buttons, and its L/R click buttons are optical instead of mechanical.
The Razer Viper Ultimate is a better mouse than the Logitech G403 Wireless Gaming Mouse. It's noticeably lighter and smaller than the G403, which is great for fast movements. Its low-profile, ambidextrous design is great for FPS players to use a fingertip grip and it also comes with a nice and sleek looking charging dock, which also has RGB lighting. The Razer Viper Ultimate also has one of the lowest click latencies we've measured. On the other hand, if you prefer a palm grip, the Logitech G403 Wireless is the better option. Its software is also available on macOS, which isn't the case with Razer Synapse.
The Razer Viper Ultimate is a much better wireless gaming mouse than the Alienware AW610M. The Razer is much lighter, has a much better cable, much lower click latency, better sensor performance, and more programmable buttons. While the Alienware is suitable for all hand sizes with palm grip, and larger hands for claw grip, the Razer can only be used by extra-large hands with a fingertip grip.
The Razer Pro Click and the Razer Viper Ultimate score the same overall; however, they're designed for different uses. The Pro Click is meant for productivity with multi-device pairing capability, and its scroll wheel has L/R tilt input. The Ultimate is much lighter and comes with a nice charging cradle. The Pro Click is designed for right-handed use, while the Ultimate is ambidextrous.
The Razer Viper Ultimate is a better gaming mouse than the SteelSeries Sensei Ten. Both mice come with an ambidextrous design and two side buttons on each side, but the Razer has a more solid design and doesn't feel slippery. The Razer also comes with a unique charging station that also acts as a receiver range extender for better performance.
The Razer Viper Ultimate is a slightly better gaming mouse than the Corsair KATAR PRO Wireless. The Razer feels better built, has a wider and more adjustable CPI range, and more programmable buttons. However, the Corsair has Bluetooth support, uses one AA battery, and its software is compatible with macOS, although it's less user-friendly.
The Razer Viper Ultimate is a much better gaming mouse than the VicTsing Wireless Gaming Mouse. The Razer is much lighter, better for more hand sizes with claw grip, has significantly lower click latency, and has a much better performing sensor. The Razer has 10 buttons that can be programmed within Razer's software, while the VicTsing doesn't have a companion program to make any customization options.
The Razer Viper Ultimate is a much better-performing mouse than the J-Tech Digital V628X. The Razer performs better in every regard, though the J-Tech has a very unique and customizable vertical design that may be more comfortable to some people after using it for extended periods.
The Razer Viper Ultimate is better for most uses than the Logitech G903 HERO. The Razer has slightly lower click latency, is more comfortable, and has much better feet so it glides better. However, the Logitech has a higher max CPI, less CPI variation, and the G HUB software is available on macOS, while the Razer Synapse 3 software isn't.