Pricing built for innovation

We have speech to text models available for both pre-recorded audio and live transcription settings. For pre-recorded, Universal-3.5 Pro is our most accurate model, delivering best-in-class transcription across a wide range of audio types and languages. Universal-2 offers excellent accuracy at a lower price point. Our streaming models are optimized for real-time use cases, with Universal-3.5 Pro Realtime delivering the highest accuracy and Universal-Streaming providing a cost-effective option.

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.

Yes. We offer custom pricing for customers with high-volume usage. Contact our sales team to discuss tiered pricing, volume discounts, and enterprise agreements tailored to your needs.

AssemblyAI’s Streaming API features free, unlimited, automatic scaling concurrency with no additional fees. On the free plan, you can open up to 5 new streaming connections per minute. On the pay-as-you-go plan, your starting limit is 100 sessions per minute — anytime you are utilizing 70% or more of your current limit, the number of new streams able to be opened over the next minute will automatically increase by 10%. This usage pattern has no ceiling and can continue to scale up indefinitely to whatever your application requires. Custom starting limits beyond 100 are also available at no additional cost.

We bill monthly based on your actual usage. There are no minimum commitments, upfront fees, or contracts on the pay-as-you-go plan. Invoices are generated at the start of each month for the previous month’s usage.

Multichannel audio is billed per channel. For example, a 1-hour stereo (2-channel) file is billed as 2 hours of transcription. Each channel is transcribed independently, which provides more accurate results for multi-speaker recordings.

Yes. AssemblyAI is available on the AWS Marketplace, allowing you to consolidate billing through your existing AWS account. Contact our sales team for details on setting this up.

AssemblyAI supports transcription in over 99 languages across our models. Please visit our documentation for the complete list.

Yes. With Speaker Diarization, AssemblyAI can detect and label different speakers — available for both pre-recorded and Realtime Speech-to-Text API models. AssemblyAI builds and trains its speaker diarization models in-house. And with Speaker Identification, you can replace generic “Speaker A” and “Speaker B” labels with real names or roles.

A token is a unit of text used by large language models (LLMs) in the LLM Gateway. Tokens roughly correspond to word fragments — on average, one English word equals about 1.3 tokens. LLM Gateway pricing is based on the number of input and output tokens processed by the selected model.