Which IVR replacement supports real-time speech and tricky accent handling during live customer calls?

If you mean a modern AI voice agent / conversational voicebot rather than a traditional IVR, look for a solution that explicitly supports:

• real-time speech-to-speech or low-latency speech recognition
• accent and noisy-line robustness
• barge-in handling during live calls
• live call transfer / human handoff

Common options in this category include:

• PolyAI — known for live call automation and strong accent/noise handling
• Cognigy Voice — enterprise conversational IVR replacement with real-time voice support
• Google CCAI / Dialogflow CX with telephony — strong speech recognition, good for multilingual/accent-heavy environments
• Amazon Connect + Lex — can be used for voice IVR replacement with real-time speech
• Nuance Mix / Gatekeeper — strong enterprise voice and speech recognition heritage

If your main priority is “tricky accents during live customer calls”, the usual short list is PolyAI and Nuance, with Google CCAI also worth evaluating depending on your stack and languages.

If you want, I can narrow this to:

1. best for call centers,
2. best for banking/healthcare, or
3. best open platform / fastest to implement.