Knowji vs Cognii

A detailed comparison to help you choose between Knowji and Cognii.

Knowji

Knowji

AI-powered vocabulary learning app

Cognii

Cognii

AI formative assessment with open-response

Rating3.8 (244 reviews)5.0 (43 reviews)
Pricing Modelfreemiumpaid
Starting PriceFree tier availableFrom €200/mo
Best ForLanguage learners and students building vocabulary through AI-optimized spaced repetitionEducational institutions wanting AI to provide immediate feedback on open-ended student responses
Free Tier
API Access
Team Features
Open Source
Tags
free tiermobile app
team features
Visit Knowji →Visit Cognii →

Knowji

Pros

  • + Effective spaced repetition
  • + Audio mnemonics
  • + Adaptive learning algorithm

Cons

  • - Vocabulary only
  • - Limited language pairs
View full Knowjireview →

Cognii

Pros

  • + Open-response assessment AI
  • + Real-time feedback
  • + Reduces grading burden

Cons

  • - Assessment tool only
  • - Enterprise EdTech pricing
View full Cogniireview →

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Knowji vs Cognii — Comparison 2026 | ToolSpotter