How we rank: Translation tools
The Score (0–100) is a weighted sum of the factors below. Each factor is the weighted average of its metrics; each metric is calculated from one published fact. Missing facts score zero, and a service is ranked only when enough of its Score is backed by facts.
A service is ranked only when at least 70% of its Score is backed by verified facts.
Privacy 30%
Whether the vendor states that texts sent on its paid plan or API are not used to train models and are deleted after translation, and whether it holds ISO 27001 certification.
| Metric | Rule |
|---|---|
| Texts not used for training (paid plan / API) | Yes = 100, No = 0 |
| Texts deleted after translation | Yes = 100, No = 0 |
| ISO 27001 certification | Yes = 100, No = 0 |
Features 30%
The officially stated number of languages (log scale, full credit at 250), translation of whole documents with layout, glossaries, a developer API and offline mode in the apps.
| Metric | Rule |
|---|---|
| Languages | Logarithmic, full score at 250 |
| Document translation | Yes = 100, No = 0 |
| Glossary | Yes = 100, No = 0 |
| Developer API | Yes = 100, No = 0 |
| Offline mode | Yes = 100, No = 0 |
Price 20%
Whether a free plan exists and the monthly price of the cheapest paid personal plan: $0 (free-only services) scores 100, $30 or more scores 0.
| Metric | Rule |
|---|---|
| Free plan | Yes = 100, No = 0 |
| Cheapest paid plan, per month | Linear from 0 (100) to 30 (0) — lower is better |
Reputation 20%
App Store rating (US): 3★ scores 0 and 5★ scores 100, damped when there are few ratings (full weight at 1,000,000); plus the company's track record (15+ years gets full credit).
| Metric | Rule |
|---|---|
| App Store rating | 3★ = 0, 5★ = 100, damped below 1,000,000 ratings |
| Company founded | Full score at 15+ years |