PolyAI Alternatives

The closest alternative to PolyAI is Retell AI. 3 more are listed below, ranked by how much of PolyAI each one replaces.

1.Favicon of Retell AI

Retell AI

Direct replacement
Per-minute voice agent infrastructure with a published rate card
Sales-gated·+$0.00 per AI interaction

The same per-minute axis with the opposite disclosure posture. Retell publishes a full itemised rate card, $0.055/min voice infrastructure, $0.015/min telephony and a per-model LLM line, so the bill is calculable before contact. PolyAI publishes the unit and withholds the rate.

Direct replacementVoice AI
2.Favicon of Parloa

Parloa

Direct replacement
Enterprise voice agent with no published rate card
Sales-gated

The closest like-for-like on buyer and posture: an enterprise voice agent sold into contact centres through a demo request rather than a price.

Direct replacementChatbotsVoice AI
3.Favicon of Sierra

Sierra

Partial replacement
Outcome-priced AI agent with no published rate
Sales-gated

Also publishes no rate, but bills a resolved outcome rather than elapsed time. The choice between them is which exposure you prefer: a disputed definition of resolved, or minutes that bill whether or not the call worked.

Partial replacementAI SupportVoice AI
4.Favicon of Vapi

Vapi

Partial replacement
Developer voice infrastructure with pass-through model costs
Sales-gated·+$0.01 per AI interaction

Developer-first voice infrastructure with a published per-minute platform fee. A different buyer, and the counterexample to the claim that per-minute voice pricing cannot be published.

Partial replacementVoice AI

What PolyAI costs

  • Billing unit
    Per minute of voice agent use
  • Free tier
    Not published
  • AI pricing
    Not published
  • Vendor calls it
    minute
  • Human handoff
    Not published
  • Reopened chat
    Not published
  • AI billing window
    Not published
  • Data export
    Not published
  • Automation export
    Not published

7 of 9 not published by PolyAI, checked

4 Best PolyAI Alternatives in 2026 – Support Alternatives