# Open-source alternatives for Image upscaling

> Enlarge and restore photos with AI models that run on your own computer, without a paid upscaler licence.

## Paid products
- [Open-source alternatives to Topaz Gigapixel](https://repoquarry.dev/alternatives/topaz-gigapixel.md): Topaz Labs' desktop image upscaler for Windows and macOS. It enlarges photos up to 16x with a set of AI models (Standard, High Fidelity, Low Resolution, Text and Shapes, Art and CG, generative Wonder and Redefine), recovers faces, renders locally or in Topaz's cloud, batch-processes folders and plugs into Photoshop and Lightroom Classic. It does not upscale video; that is a separate Topaz product. Pricing: See pricing page.

## Top ranked projects
1. [Upscayl](https://repoquarry.dev/projects/upscayl.md): Desktop AI image upscaler for Windows, macOS and Linux, built on Real-ESRGAN models running through ncnn and Vulkan. Commercial use: Partial.
2. [chaiNNer](https://repoquarry.dev/projects/chainner.md): Node-based image processing app built for AI upscaling, running PyTorch, NCNN, ONNX and TensorRT models on GPU or CPU. Commercial use: Partial.
3. [Final2x](https://repoquarry.dev/projects/final2x.md): Cross-platform desktop image super-resolution app with built-in models and support for loading your own. Commercial use: Unknown.
4. [QualityScaler](https://repoquarry.dev/projects/qualityscaler.md): Windows app that upscales and denoises photos and videos with ONNX models on any DirectX 12 GPU. Commercial use: Unknown.
5. [waifu2x-ncnn-vulkan](https://repoquarry.dev/projects/waifu2x-ncnn-vulkan.md): Portable command-line waifu2x upscaler and denoiser that runs on Intel, AMD, Nvidia and Apple Silicon GPUs via Vulkan. Commercial use: Confirmed.
6. [CodeFormer](https://repoquarry.dev/projects/codeformer.md): Face restoration model from NTU S-Lab with a fidelity slider, video input and face colorization; non-commercial licence. Commercial use: No.
7. [Real-ESRGAN](https://repoquarry.dev/projects/real-esrgan.md): Reference AI super-resolution model for real-world photos and anime, with a Python script and portable Vulkan executables. Commercial use: Confirmed.
8. [GFPGAN](https://repoquarry.dev/projects/gfpgan.md): Tencent ARC face restoration model that repairs blurry, low-res faces in old photos, with optional Real-ESRGAN background upscaling. Commercial use: Partial.
9. [SeedVR2 Video Upscaler (ComfyUI)](https://repoquarry.dev/projects/seedvr2-comfyui.md): ComfyUI nodes and standalone CLI for ByteDance's SeedVR2, a one-step diffusion upscaler for images and video. Commercial use: Confirmed.
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Source: RepoQuarry (https://repoquarry.dev/categories/image-upscaling). Data licence: CC BY 4.0. Quotes are from project documentation and belong to their authors.