STT Cost Calculator
Estimate your monthly speech-to-text API cost across major providers
Deepgram Nova-3
Free tier: $200 one-time credit
OpenAI Whisper
Free tier: None
Groq Whisper
Free tier: Generous tier
AssemblyAI
Free tier: 100 hrs/mo
Use these providers with OpenTypeless — switch between them in one click, no reconfiguration needed.
Frequently Asked Questions
Which STT provider is cheapest?
For paid usage, Groq Whisper (~$0.002/min) and AssemblyAI (~$0.00249/min) are the cheapest. Deepgram ($0.0059/min) is more expensive but offers the lowest latency. For free usage, AssemblyAI (100 hrs/mo) and Groq offer the most generous free tiers.
How accurate are these STT APIs?
All four providers achieve >95% accuracy for English in clean audio. For multilingual content, Whisper-based providers (OpenAI, Groq) support 99 languages. Deepgram excels at English technical vocabulary and real-time streaming.
Can I switch providers without losing my settings?
Yes — OpenTypeless stores each provider's API key and settings independently. Switch providers with one click from the settings panel.