API Ninjas Sudoku alternatives
API Ninjas Sudoku pricing (for reference)
| Published paid plans | Free | Source, checked |
|---|---|---|
| Developer $39/100,000; Business $99/1,000,000; Professional $199/10,000,000 (shared API Ninjas quota); JSON only | yearly: '34% off' yearly | Free tier with key (3,000 calls/mo shared); commercial use not permitted on free | api-ninjas.com, 2026-09-27 |
Alternatives to API Ninjas Sudoku
What buyers compare on: Price per generated puzzle (per API request) and output format (JSON grid vs printable SVG/PNG).
| Option | Published paid plans | Free | Source, checked |
|---|---|---|---|
| Sumbloom API (CyberMax) | Sumbloom API Starter: 10,000 puzzles a month: $5/month Sumbloom API Pro: 100,000 puzzles a month: $15/month Sumbloom API Starter yearly: 10,000 puzzles a month, billed yearly: $50/year Sumbloom API Pro yearly: 100,000 puzzles a month, billed yearly: $150/year | free 50/day | CyberMax store, live |
| YouDoSudoku API | None | '100% free', API key required, no stated rate limit; JSON only, sudoku only | www.youdosudoku.com, 2026-09-27 |
| KDPEasy | Starter $19/mo 35 credits; Pro $49/mo 100 credits; Power User $79/mo 250 credits; includes sudoku/word search/crossword/maze creators (no kakuro/kenken listed) | PAYG: Credits purchasable individually (rates not shown) | yearly: '2 months free' banner | None for generators (3 free covers) | www.kdpeasy.com, 2026-09-27 |
Get Sumbloom API Starter: 10,000 puzzles a month: $5/monthTry itAll plans
How to choose
- Price the unit you actually use (Price per generated puzzle (per API request) and output format (JSON grid vs printable SVG/PNG)), not the headline plan.
- Check what the free tier allows before paying: several options above list one.
- Test on your own data; switch costs are usually the data format and integrations, not the price.
Head to head: Sumbloom API vs API Ninjas Sudoku
Cite this page: CyberMax, "API Ninjas Sudoku alternatives: 3 options with published prices (2026-09-27)", https://cybermaxtools.com/alternatives/api-ninjas-sudoku/ (prices checked 2026-09-27). Each rival price is quoted from the source linked next to it, on the date shown.
API Ninjas Sudoku and the other names here are trademarks of their owners, used only to compare published prices.