Blog
Blog
Research, analysis, and benchmarks from the Speko team.
How We Benchmark Voice AI: Our Methodology
Transparent methodology behind Speko's voice AI benchmarks. How we source data, normalize costs, and what we measure (and don't) across STT, TTS, LLM, and full-stack pipelines.
The Real Cost of Voice AI in 2026: What Every Builder Should Know
Comprehensive breakdown of voice AI costs in 2026. STT, TTS, LLM, platforms, and telephony: what you'll actually pay per minute, from $0.0095 budget stacks to $0.1727 ultra-premium.
Speech-to-Speech vs Cascaded Pipelines: Which Architecture for Voice AI?
Comparing S2S and cascaded (STT+LLM+TTS) architectures for voice AI. Latency, cost, quality, and when to use each approach, with real numbers from our benchmark data.
The Best STT Providers in 2026: Ranked by Accuracy, Latency, and Cost
A data-driven ranking of the top speech-to-text providers in 2026. Deepgram, AssemblyAI, Whisper, Google, Azure — compared on WER, latency, cost, and language support.
Building Voice AI for Non-English Languages: A Developer's Guide
A practical guide to building voice AI agents for Japanese, Hindi, Arabic, Spanish, and other non-English languages. Provider recommendations, accuracy benchmarks, and deployment patterns.