Deepgram vs AssemblyAI pricing
STT: Deepgram from $0.0048 vs AssemblyAI from $0.0025.
Last updated · prices checked daily
Speech-to-text: Deepgram vs AssemblyAI
AssemblyAI has the lower listed STT price: $0.0025 per minute (Universal-Streaming (English)) vs $0.0048 for Deepgram (Nova-3 Monolingual (streaming, current price)), about 48% less.
| Vendor | Product / tier | $/min |
|---|---|---|
| AssemblyAI Visit site ↗ | Universal-Streaming (English) | $0.0025 |
| AssemblyAI Visit site ↗ | Universal-2 (pre-recorded) | $0.0025 |
| AssemblyAI Visit site ↗ | Universal-3.5 Pro (pre-recorded) | $0.0035 |
| Deepgram Visit site ↗ | Nova-3 Monolingual (streaming, current price) Pay as you go Page shows a discounted 'current price' next to a higher 'regular price'. | $0.0048 |
| Deepgram Visit site ↗ | Flux English (streaming, current price) Pay as you go | $0.0065 |
What it costs at volume (lowest listed rate)
| Minutes | Deepgram | AssemblyAI |
|---|---|---|
| 1,000 min | $4.80 | $2.50 |
| 10,000 min | $48.00 | $25.00 |
| 100,000 min | $480.00 | $250.00 |
Cost-per-call calculator
Estimate what one call really costs. Prices come from today's table; LLM and telephony presets are per-minute rates published by Retell and Vapi. Everything is editable.
Cartesia's pricing page puts one minute of speech at 750–800 characters; Rime says about 1,000. The talk share is your own guess at how much of each call the agent is speaking.
FAQ
Is Deepgram or AssemblyAI cheaper for speech-to-text?
AssemblyAI has the lower listed STT price: $0.0025 per minute (Universal-Streaming (English)) vs $0.0048 for Deepgram (Nova-3 Monolingual (streaming, current price)), about 48% less. Prices checked Oct 28, 2026.
How often are these prices updated?
Every day. A script reads each vendor's public pricing page, extracts the listed rates and keeps a dated copy, so price changes show up in the history.