ATOS Analyzer vs Readable
ATOS Analyzer
renaissance.com
Readable
readable.comSide by side
| Figure | ATOS Analyzer | Readable |
|---|---|---|
| Price from | Free | $12/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 1 | 3 |
| Spec score · Readability Checkers | 8.4 (#5) | 8.3 (#8) |
| Founded | 1986 | LinkedIn lists Readable as founded in 2016. |
| Intended users | Renaissance describes ATOS as a readability measure designed to guide students to appropriate-level books. | Readable describes its audiences as authors, marketers, educators, lawyers, and others working to improve writing. |
| Purpose | The analyzer calculates readability levels for text passages or books. | Readable is an online toolkit for analyzing and improving writing readability and quality. |
| Support | Renaissance offers product support through its Knowledge Base, support form, in-product chat, phone during regular business hours, and email. | Readable advertises an extensive knowledge base plus in-app and email support. |
Plans
In their own words
ATOS Analyzer
ATOS Analyzer is a free web tool for estimating the readability level of text and books in English or Spanish. Users can enter a passage, analyze an entire book, or submit a sample with an estimated word count. Text can be typed or uploaded as a .txt, .docx, or .epub file, with uploads limited to 10 MB. The suggested passage length is 150 to 25,000 characters. Results include an ATOS level, grade-level equivalent, word count, AR Points, average word length, average sentence length, and language. ATOS estimates complexity on a grade-level scale using sentence length, word length, and word difficulty; its measure also accounts for book length. For a sampled book, Renaissance recommends three passages of about 150 words from different parts and an estimated total word count. Scanned documents need OCR to become recognized text before submission; changing a file extension does not convert them. The page includes a CCSS/ATOS grade-band chart for grades 1 through 12. Renaissance presents the measure as guidance for matching students with appropriately leveled reading material.