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SPECIFICTION
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Knockout API vs Mocki

Knockout API

useknockout.com

Mocki

mocki.io

Side by side

FigureKnockout APIMocki
Price from$0.02/mo$15/mo
Free planYes—
Free trial—Yes
Open source——
WebYesYes
APIYesYes
Self-hosted—Yes
Plans published71
Spec score · API Mocking Tools8.4 (#7)8.0 (#9)
PurposeKnockout provides image and video processing tools through a browser app and API.Mocki lets users create, run, and deploy mock APIs for development and testing.
SecurityThe privacy policy says API tokens are SHA-256 hashed, passwords are managed by Supabase Auth using bcrypt, and traffic is encrypted via TLS.Mocki's privacy policy says it uses commercially acceptable means to protect personal information but cannot guarantee absolute security.
SupportThe site lists community support for Free, email support for Pay-as-you-go, and Slack support for Volume.The site offers prioritized support with the Starter plan and says users can contact the maker through the site's chat.

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

Knockout API pricing →

Mocki

  • Starter$15 a month

Mocki pricing →

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.

Visit useknockout.com

Mocki

Mocki has no write-up on Specifiction yet; its figures are above.

Visit mocki.io