Speech Recognition Provider Comparison

Understand how UponAI’s speech recognition providers differ and how the platform auto-routes to the best fit for your selected languages.

UponAI automatically picks a speech recognition provider based on the languages your agent is configured for. You don’t need to choose one manually, but understanding the trade-offs helps when deciding which languages to support.

These observations are based on internal testing and routing rules. Results may vary depending on specific languages, audio conditions, and call patterns.

Provider Overview

Deepgram

• Best for: Lowest latency — the default for single-language agents on common languages
• Multilingual: Supports code-switching across 10 languages: English, Spanish, French, German, Hindi, Russian, Portuguese, Japanese, Italian, Dutch
• Consideration: Doesn’t cover less-common languages (e.g., Welsh, Marathi, Kazakh)

Azure

• Best for: The broadest single-language coverage — including languages no other provider supports (e.g., Icelandic, Nepali, Filipino)
• Consideration: No multilingual mode. Used only when the agent is configured with a single language.

Soniox

• Best for: Multilingual code-switching across a much wider set than Deepgram — about 50 languages, with the same coverage in both single and multi modes
• Consideration: Slightly higher latency than Deepgram, so UponAI prefers Deepgram when both providers support a language

How UponAI Picks a Provider

UponAI evaluates the agent’s selected languages against each provider’s coverage and routes to the most accurate option:

Scenario	Provider chosen
Single common language	Deepgram
Single uncommon language (not covered by Deepgram)	Azure
Multiple languages, all within Deepgram’s multilingual set	Deepgram multilingual
Multiple languages, broader combination	Soniox
Multiple variants of the same base language (e.g., en-US + en-GB)	Routed as single-language — no accuracy penalty

If no single provider can cover all of your selected languages together, the dashboard prevents you from selecting that combination. See Configure a multilingual agent for details.