| Feature | Word Orb | Datamuse API |
|---|---|---|
| Languages | 47 + native script | English + Spanish |
| Educational Content | 162K words + structured daily lessons + 45K+ assessments | - |
| API Response Time | <50ms edge | ~100ms |
| Knowledge Graph | 30K+ connections (words↔lessons↔quizzes) | Word associations |
| Quizzes & Assessment | 45,916 assessments | - |
| Structured Lessons | structured daily lessons | - |
| Pronunciation Audio | 240K files | - |
| Search | Prefix + fuzzy + definition + autocomplete | Pattern + rhymes + related |
| Batch Requests | Up to 50 words | - |
| Pricing | Free 500/day, from $29/mo | Free (100K/day) |
| MCP Agent Support | 12 tools | - |
- Full word objects (definition, IPA, etymology, translations) - Datamuse returns only word strings and scores.
- Complete learning cycle: look up -> lesson -> quiz - all linked through the knowledge graph.
- 47-language translations in every response.
- MCP server for AI agents - real dictionary, not just word associations.
Fair comparison: Datamuse has excellent pattern matching (sounds-like, spelled-like, triggered-by) and 100K/day free.
Use the playground, inspect the JSON, and decide based on the shape of the product rather than the pitch.