Alt Denoiser vs Noise Blocker
Alt Denoiser
github.com
Noise Blocker
closedlooplabs.comSide by side
| Figure | Alt Denoiser | Noise Blocker |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | — |
| Plans published | 0 | 5 |
| Spec score · AI Noise Cancellation Software | 7.5 (#10) | 7.9 (#7) |
| Latency | The v1.0.2 release notes state that the processing FIFO uses a declared 1920-sample latency. | The FAQ says audio processing adds about 80 milliseconds of latency, varying by system. |
| Purpose | Alt Denoiser is a real-time AI audio noise suppression plugin based on DeepFilterNet. | Noise Blocker removes microphone background sounds such as fans, keyboards, clicks, hiss, and room noise in real time. |
| Support | The repository exposes GitHub Issues for project questions and bug reports. | Personal licenses include 12 months of priority support, and the FAQ directs users with questions to email support. |
Plans
Noise Blocker
- Business trialFree
- Free versionFree
- Personal license renewal$30, paid once
- Personal license$50, paid once
- Business licensePrice not published
In their own words
Alt Denoiser
Alt Denoiser is a real-time audio noise suppression plugin based on DeepFilterNet. It is free and open source, with precompiled downloads for Windows, macOS and Linux in VST3, VST2, AU, LV2 and Standalone formats. DeepFilterNet3 models are bundled, so no separate model download is needed. The plugin accepts any host sample rate and resamples automatically. Its interface has an attenuation control and input and output RMS meters. Version 1.0.2 supports mono-to-mono, stereo-to-stereo and mono-to-stereo routing, and declares 1,920 samples of latency for startup and reset FIFO prefill. Release notes mention fixes for stutter and dropouts in EqualizerAPO and DAWs at standard host buffer sizes. Linux build instructions cover Ubuntu/Debian, Fedora and Arch; building from source requires CMake 3.15 or later, Rust and a C++ compiler. The project is licensed under GPLv3 and directs questions and bug reports to GitHub Issues. macOS binaries target macOS 14.0 and later.
Noise Blocker
Noise Blocker is a Windows app that reduces unwanted microphone sounds in real time, including fan noise, keyboard sounds, clicks, hiss, and room noise. Version 3 uses AI to distinguish a speaker’s voice from background sound and is designed for everyday laptops. The maker says the app needs no tuning or complicated setup. It is listed as compatible with Zoom, Google Meet, Discord, Slack, Teams, and OBS, and supports microphone audio for recording and streaming. Noise Blocker supports Windows 10 and Windows 11; other operating systems are not currently supported. Processing adds about 80 milliseconds of latency, which varies by system. The free version provides 30 minutes of blocking per week without an email requirement. A Personal license is a one-time payment of $50 for one person on up to three PCs, with 12 months of updates and priority support, indefinite use of covered versions, and a 14-day money-back guarantee. A 30-day business trial for up to 20 employees or computers requires a request and approval; no card is required.