NovaBlock vs AdGuard

AdGuard is one of the most ambitious products in the ad-blocking space. It is not just an extension; it is a family of apps that filter network traffic at the operating-system level. NovaBlock is, deliberately, narrower in scope: a single browser extension that does ads, trackers, cookie banners and YouTube extremely well.

The right answer depends almost entirely on whether you want to filter only browser traffic or every byte your device sends and receives. This comparison walks through the differences honestly, with no marketing varnish on either side.

For background on the wider 2026 market, our best ad blocker 2026 guide places both in context.

What each product actually is

AdGuard the company sells:

• A free browser extension for Chrome, Edge, Firefox and Opera.
• Paid desktop apps for Windows and macOS that filter all browser and many native app requests.
• Mobile apps for Android and iOS.
• AdGuard DNS, a public DNS service with filtering rules.
• AdGuard VPN, a separate paid VPN product.

NovaBlock is:

• A browser extension for Chrome, Edge, Brave and Firefox.
• A free tier covering ads, trackers, pop-ups, cookie banners and YouTube basics.
• A Premium tier adding advanced YouTube AI detection, multi-device sync and faster filter updates, with a pricing page you can read in two minutes.

That difference in scope is the most important fact in this whole comparison. Everything else flows from it.

Performance in the browser

Comparing the AdGuard browser extension to NovaBlock on a clean Chrome 132 profile, with the standard test set of 25 sites:

The two are within statistical noise on filtering quality. NovaBlock is slightly lighter on memory, which matters more on Chromebooks and older laptops than on a recent MacBook. Cookie banners and YouTube are both excellent on both products.

When you bring AdGuard's desktop app into the picture, the comparison changes. The desktop app filters traffic from every browser and many native apps, which the NovaBlock extension cannot do. It also adds 60 to 120 MB of memory and a background service. Whether that trade-off is worth it depends on what you are trying to protect.

Features

Browser ad blocking

Both ship strong filter lists. AdGuard maintains its own set of lists in addition to community lists; NovaBlock ships community lists plus a small in-house list for very new trackers. In practice, blocking accuracy is essentially tied.

YouTube

Both invest in YouTube specifically. NovaBlock ships a dedicated YouTube module updated independently of filter lists. AdGuard has a comparable team. In our weekly tests through 2025 and 2026, NovaBlock typically caught up to new YouTube anti-blocker waves in 24 to 72 hours; AdGuard typically caught up in 2 to 7 days. For most users this is indistinguishable. For heavy YouTube watchers it can matter. Background in our block YouTube ads guide.

Cookie banners

NovaBlock has cookie banner removal on by default. AdGuard has it available but, depending on installation flow, it may be off by default. The end-state suppression quality is similar once enabled. See remove cookie banners for the technical detail.

System-wide filtering

This is where AdGuard pulls away. The paid desktop app filters traffic in Steam, Spotify, smart-TV apps if proxied, and many other native applications. If your goal is "no ads anywhere on this device", AdGuard is the tool. NovaBlock will not do that and is not trying to.

DNS filtering

AdGuard DNS is a useful, free public DNS resolver with optional family-friendly filtering. NovaBlock does not run DNS. You can absolutely combine NovaBlock in the browser with AdGuard DNS at the network level, and many users do.

Account and sync

NovaBlock Premium syncs across all your devices via one account. AdGuard's subscription is per-device-count, with a license server that activates each device. Both work; the NovaBlock flow is slightly simpler.

Privacy

Both companies have reasonable privacy postures.

• AdGuard collects some product analytics by default in the desktop app, with opt-out toggles. The extension is light on telemetry.
• NovaBlock collects no in-product analytics in either the extension or Premium account flow. Our privacy page is short on purpose.

There is no privacy "winner" here in any meaningful sense, but if you are the kind of person who reads privacy policies before installing software, NovaBlock's is shorter and that is by design.

Business model and cost

AdGuard's structure:

• Free browser extension.
• Paid desktop and mobile apps with per-device licensing.
• Separate paid VPN.

NovaBlock's structure:

• Free browser extension.
• Single Premium subscription, monthly or yearly, with a 7-day free trial. See the pricing page.

For browser-only users, NovaBlock is the lower-friction option both in setup and billing. For users who want one company providing browser, system-wide and VPN coverage, AdGuard's bundled approach has appeal.

Pros and cons

NovaBlock pros

• Focused, fast browser extension.
• Excellent YouTube and cookie banner defaults.
• Zero in-product telemetry.
• Simple subscription model.
• Light on memory.

NovaBlock cons

• Browser only. Will not filter native apps.
• Does not run a DNS resolver.
• No bundled VPN.

AdGuard pros

• System-wide traffic filtering on the desktop app.
• AdGuard DNS is genuinely useful even outside the AdGuard ecosystem.
• One vendor across browser, OS and DNS.
• Mature, well-funded company with a long history.

AdGuard cons

• Heavier across the board.
• Paid desktop app increases cost and complexity.
• Default telemetry exists, though it can be turned off.

Real-world scenarios

• You only use Chrome and you want one less tab of nonsense: NovaBlock.
• You watch a lot of Spotify with ads, play games with ads, or stream on a smart TV with proxying: AdGuard desktop or mobile app.
• You run a household and want to filter ads at the router level for guests too: AdGuard DNS or a Pi-hole, plus NovaBlock or AdGuard extension in the browser.
• You are an EU user with cookie banner fatigue and not much budget: NovaBlock free tier covers it.
• You want one vendor to handle browser, system and DNS: AdGuard.

Can you use them together?

Technically yes. Running NovaBlock in the browser and AdGuard's desktop app or DNS at the system layer is a reasonable, complementary stack. We would not recommend running both browser extensions simultaneously because they compete for the same requests.

Conclusion

AdGuard and NovaBlock are aimed at slightly different problems. AdGuard's strongest pitch is "one tool for every kind of ad on every kind of app". NovaBlock's strongest pitch is "the best browser ad blocker, with the least configuration and the cleanest business model". If your time is mostly spent in a browser, NovaBlock is the simpler win. If you want a system-wide solution and you do not mind paying for it, AdGuard earns its place.

Either way, do not browse 2026 without something. Install NovaBlock from the Chrome Web Store or Firefox Add-ons and the day-one experience will tell you everything you need to know.