Word Orb vs Free Dictionary API

Free Dictionary API is free and basic. Word Orb is free and comprehensive.

Feature Comparison

Feature	Word Orb	Free Dictionary API
Languages	47 + native script	English (some others)
Educational Content	162K words + 226K lessons + 21.9K quizzes	—
API Response Time	<50ms edge	~200ms
Knowledge Graph	30K connections	—
Quizzes & Assessment	21,900 assessments	—
Structured Lessons	226,000 blocks	—
Pronunciation Audio	240K hosted files	External links
Search	Prefix + fuzzy + definition	Exact match only
Batch Requests	Up to 50 words	—
Pricing	Free 500/day, from $29/mo	Free (no paid tier)
MCP Agent Support	12 tools	—

Why Developers Choose Word Orb

162K words with consistent JSON — not scraped HTML with unpredictable schemas.
Self-hosted audio on R2 — no broken external links.
47 languages, etymology, IPA, and age-calibrated definitions in every response.
Search, autocomplete, related words, word-of-the-day — all free.

Fair comparison: Free Dictionary API has zero cost with no rate limits and no signup required — great for quick prototypes.

Kelly, your AI language teacher, powers every Word Orb response. Curated by educators. Gender-equitable. Age-appropriate. No competitor offers this depth of pedagogical structure in an API.

Try It Now

Open Playground →

1,000 free API calls/month. No credit card required.