Erase.bg vs Knockout API
Erase.bg
erase.bgKnockout API
useknockout.comSide by side
| Figure | Erase.bg | Knockout API |
|---|---|---|
| Price from | Free | $0.02/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 12 | 7 |
| Spec score · AI Background Removers | 9.3 (#5) | 8.5 (#19) |
| Spec score · Background removers | 9.4 (#5) | 8.5 (#16) |
| Spec score · Green Screen Software | 9.1 (#3) | 8.0 (#13) |
| Free plan | Yes | Yes |
| Support | The pricing page lists 24/7 customer support via chat and email with Pro, and the site directs users to [email protected]. | The site lists community support for Free, email support for Pay-as-you-go, and Slack support for Volume. |
Plans
Erase.bg
- Starter PlanFree
- One-time payment — 10 creditsPrice not published
- One-time payment — 100 creditsPrice not published
- One-time payment — 1000 creditsPrice not published
- 10 Credits$6, paid once
- One-time credits — 10 credits$6, paid once
- 100 Credits$12, paid once
- One-time credits — 100 credits$12, paid once
- 1000 Credits$50, paid once
- One-time credits — 1000 credits$50, paid once
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
Erase.bg
Erase.bg uses AI to remove backgrounds from images, with tools to replace backgrounds, add colors or patterns, and resize images by aspect ratio. It accepts PNG, JPEG, JPG, WEBP, and HEIC images up to 10,000 × 10,000 pixels, along with MP4, MOV, and WEBM videos up to 30 seconds. Downloads include PNG and JPG formats. Bulk processing can handle multiple images, and developers can use API examples for React, JavaScript, Python, Node.js, Kotlin, Golang, C#, and PHP. Each background removal uses one credit. The free Starter Plan includes three credits and three downloads for personal use; new API users receive three free credits that reset daily. One-time credit packs are listed at $6, paid once for 10 credits, $12, paid once for 100 credits, and $50, paid once for 1,000 credits. Those packs are non-refundable, with credits valid for one year. Erase.bg is available on the web and Android, with API access. Its privacy policy says images are anonymously stored and information may be processed in other countries.
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.