Summarize.One is a WhatsApp bot that transcribes and summarizes voice messages into text. It uses OpenAI's Whisper speech recognition model to convert spoken content into concise summaries, allowing users to read rather than listen to long voice notes. The tool supports over 100 languages, though accuracy is highest for English, German, Spanish, French, and Italian. It offers a free tier with 5 summaries per month and paid plans with unlimited summaries, full transcriptions, and bullet-point summaries. The Pro plan enables automatic summarization of every new voice message without forwarding. Summarize.One is GDPR-compliant and does not store chat data. It is particularly useful for professionals in meetings, students in quiet environments, and individuals with hearing loss, for whom the company provides free Pro accounts.