Tongyi Tingwu
Alibaba Cloud
90-day free trial: 48 hours/day of real-time recording, plus 2 hours/day of audio/video file transcription
Once the day's quota is used up, it takes 24 hours to replenish. Real-time recording supports 2 concurrent streams, file transcription supports 1. University faculty and students also get a separate public-welfare benefit.
Tongyi Tingwu speech transcription engine
Whether payment is required after the 90-day free trial ends isn't clearly stated on the official page for the long-term individual plan — test it hands-on to confirm whether it downgrades after expiry.