If you're looking for a PROMT.One alternative, Reverso is another good option. The service translates text among 15 languages using AI technology that's designed to produce natural-sounding translations. It can translate documents in several formats, check grammar and spelling, and conjugate verbs. Reverso also offers pronunciation help and a rephraser designed to help you sound more fluent, which could be useful for students or professionals.
Another good option is DeepL. It offers translations in 11 languages, using AI technology that's designed to produce translations that sound natural to native speakers. It can translate text, documents and websites, so it's good for personal and professional use. DeepL offers a free plan with some limits and a paid subscription for more features.
You could also try Lingvanex, which offers translations in more than 100 languages with AI technology. It's available on iOS, Android, Windows and Mac, and offers several pricing tiers. Lingvanex is geared for businesses that want to improve communication and productivity across languages.
Last is OpenL, which offers translations in more than 100 languages for text, documents and images. OpenL offers a free plan with limited credits and several paid plans with different character and format limits, so it's good for different situations. The service also prioritizes privacy, deleting translation data as soon as it's done.