Knockout API vs popVideo
Knockout API
useknockout.compopVideo
reallusion.comSide by side
| Figure | Knockout API | popVideo |
|---|---|---|
| Price from | $0.02/mo | — |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| API | Yes | — |
| Plans published | 7 | 1 |
| Spec score · Video Background Removal Software | 8.1 (#10) | 7.3 (#18) |
| Spec score · Green Screen Software | 8.0 (#13) | 7.2 (#26) |
| Integrations | Official client options include Node, React, Python, and CLI, alongside REST and any HTTP client. | The proprietary popVideo format supports compositing in Reallusion animation software, including iClone. |
| Purpose | Knockout provides image and video processing tools through a browser app and API. | popVideo removes colored backgrounds from video and image sequences to create transparent video. |
| Support | The site lists community support for Free, email support for Pay-as-you-go, and Slack support for Volume. | Reallusion offers online manuals, free video tutorials, and a support contact for the product. |
Plans
Knockout API
- FreeFree
- Pay-as-you-go$0.02 a month
- Knockout Plus$10 a month
- FreeFree
- Pay-as-you-go$0.02 a month
- Knockout Plus$10 a month
- VolumePriced on request
In their own words
Knockout API
Knockout API provides image and video processing through a browser app and API. Its image tools cover background removal and replacement, batch processing, masking, smart crop, stickers, outlines, shadows, and inpainting; the API also handles upscaling, portrait restoration, colorization, and object removal. Video background removal runs asynchronously, with job polling for progress. The browser Canvas supports layered designs with text and effects, and users can save canvases and cutouts to a free account. Developers can connect through REST, any HTTP client, or official Node, React, Python, and CLI options. The service says it manages GPU processing, endpoint updates, usage records, credentials, teams, and billing. Its privacy policy says uploaded images are processed in GPU worker memory, not retained after the response, and not used to train models. The Free plan is free, with 30 images per month and 60 requests per minute. Pay-as-you-go is $0.02 a month, with metered usage billed monthly; Plus is $10 a month. Paid tiers have no monthly cap and a 600-request-per-minute limit.