AssemblyAI Speech Transcription Free Tier (185 hours pre-recorded + 333 hours streaming)

Ready to use on sign-up with no credit card required: the free tier includes up to 185 hours of pre-recorded audio transcription + 333 hours of streaming (real-time) transcription

Official pricing-page FAQ verbatim: "Yes. You can create an account and start transcribing immediately with no credit card required. The free tier includes up to 185 hours of pre-recorded transcription and up to 333 hours of streaming transcription." On streaming concurrency, the free plan can open at most 5 new streaming connections per minute (official wording "On the free plan, you can open up to 5 new streaming connections per minute"); the paid pay-as-you-go plan starts with a limit of 100 sessions per minute.

⚠️The official page does not say whether these 185 / 333 hours are a one-time allowance or refresh monthly, so go by the usage page in the console before claiming. Reachability from mainland China was not tested.