# PolyAI Alternatives (2026): 6 Voice Agent Platforms Compared

> Source: https://theagentsindex.com/polyai/alternatives (curated, quality-gated, re-verified)

PolyAI is the pre-LLM-era incumbent of the voice-agent category: founded in London in 2017, it has grown to 200+ named enterprise customers and thousands of live deployments across 75+ languages, backed by a $750M valuation on an $86M Series D (December 2025). Its Agentic Dialog Platform runs on Raven, PolyAI's own proprietary dialog model, and since a May 2026 update also supports GPT-5, Claude and Gemini as reasoning engines, reachable through a no-code Poly Agent Builder or a CLI-based Agent Development Kit. For about three months from May 2026, PolyAI was also briefly the most open platform in this category: a genuine self-serve tier, free for two months from just an email address. Re-verified live in August 2026, that tier is gone — PolyAI's own pricing and marketing pages no longer mention it, and every path in, including the no-code builder and the ADK, again starts with a sales conversation, with no public rate card (third-party estimates put typical contracts around $150,000/year and up). The six tools below are this site's other Published, individually researched voice-agent listings, each earning its place for a different reason rather than being a drop-in clone: Bland AI is the closest match on compliance depth while keeping a real no-card self-serve tier; Synthflow AI matches PolyAI's no-code builder and even exceeds its compliance certifications, with a metered self-serve on-ramp instead of a sales call; Vapi and Retell AI are both fully self-serve, developer-first platforms with published per-minute rates; ElevenLabs Conversational AI is the one alternative with an ongoing free tier, not just trial credits; and LiveKit Agents is the only genuinely open-source, self-hostable option. Every fact below traces to each tool's own already-Published, already-sourced listing on this site, re-read fresh for this page.

| # | Name | What it is | Why it's here | Pricing | API |
| --- | --- | --- | --- | --- | --- |
| 1 | [Bland AI](https://theagentsindex.com/bland-ai.md) | Enterprise voice AI that owns its own model stack, priced all-in per minute with no model pass-throughs. | The closest match on compliance depth — SOC 2 Type II, HIPAA and PCI DSS v4.0, plus self-hosted or on-premises deployment for regulated industries, the same enterprise territory PolyAI targets — but Bland keeps a real self-serve Start tier ($0.14/min, no card required, 2 credits plus an inbound number included) rather than requiring a sales conversation to even see a price. | $0.14/min / minute | Yes |
| 2 | [Synthflow AI](https://theagentsindex.com/synthflow-ai.md) | A no-code voice AI platform for enterprise phone agents — a visual Flow Designer and a structured Build-Evaluate-Launch-Learn deployment cycle, billed by the minute in separate components. | Matches PolyAI's no-code builder (a visual Flow Designer versus Poly Agent Builder) and goes further on paper-certified compliance (SOC 2, HIPAA, GDPR, PCI DSS and ISO 27001, one more certification than PolyAI lists) — but a metered pay-as-you-go tier ($0.11-$0.16/min) is live today with no sales call required, and its Enterprise contract starts around $30,000/year, a published floor PolyAI does not offer. | $0.11-$0.16 / min | Yes |
| 3 | [Vapi](https://theagentsindex.com/vapi.md) | The developer platform for voice AI agents, bring your own model, voice and telephony, and Vapi orchestrates the call. | A fully self-serve, developer-first orchestration layer at $0.05/min (plus model, voice and telephony passed through) with genuine enterprise scale to match PolyAI's own — Amazon Ring evaluated 40+ vendors and now routes 100% of its inbound calls through it — the trade-off is PolyAI's proprietary Raven model and no-code builder versus Vapi's bring-your-own-model, code-first assembly. | $0.05 / min | Yes |
| 4 | [Retell AI](https://theagentsindex.com/retell-ai.md) | Build phone-call voice agents on Retell's turn-taking layer, plug in your own LLM, voice, and telephony, ship over voice, chat, or SMS. | The other fully self-serve developer platform, live from $0.07/min with $10 in free trial credits and no sales call, built around a proprietary low-latency (~600ms) turn-taking model users consistently praise for natural-sounding calls — a newer, smaller company than PolyAI (founded 2023 versus 2017) but one that reached $60M ARR profitably on a single $4.6M seed round. | $0.07–$0.31 / min | Yes |
| 5 | [ElevenLabs Conversational AI](https://theagentsindex.com/elevenlabs-conversational-ai.md) | The voice-quality specialist’s own agent layer, 10,000+ voices and instant cloning, with a bring-your-own-LLM brain. | The one alternative here with an actual ongoing free tier, not just trial credits — 15 call minutes a month at $0/mo, versus PolyAI's complete absence of any free or self-serve path — built around ElevenLabs' own 10,000+-voice library and instant voice cloning, backed by comparable enterprise scale ($11B valuation, Deutsche Telekom, Square and Revolut already in production). | $0 / mo | Yes |
| 6 | [LiveKit Agents](https://theagentsindex.com/livekit-agents.md) | The Apache 2.0 voice-agent framework. 13.1k GitHub stars, self-hostable, and the only open-source pick in this category with fully published pricing. | The furthest departure: a genuinely open-source (Apache 2.0), self-hostable framework with a real free tier (1,000 agent-session minutes a month, no credit card) for teams that want to own their code and infrastructure entirely, rather than PolyAI's closed, cloud-only platform reachable only through a sales conversation. | $0 / month | Yes |

## Methodology

These six are drawn from this site's own Published, individually-researched voice-agents category — eleven listings in total, the same corpus behind /best-ai-voice-agents and the site's AI voice agent buyer guide — never a fresh, unverified list assembled for this page. A tool qualifies only if we have already fact-checked its pricing model and sourced its pros, cons and a "best for" call. The order runs from closest-to-furthest from PolyAI's own sales-led, no-public-pricing model, on the axis that actually separates them: self-serve access. Bland AI first, the closest match on compliance depth (SOC 2, HIPAA, PCI DSS) that still keeps a real, no-card entry tier; Synthflow AI next, matching PolyAI's no-code builder and compliance breadth with a metered self-serve path instead of a sales call; Vapi and Retell AI third and fourth, both fully self-serve, developer-first platforms with published per-minute rates; ElevenLabs Conversational AI fifth, the only one with an ongoing free tier rather than trial credits; and LiveKit Agents last, the furthest departure — open-source and self-hostable, versus PolyAI's closed, cloud-only platform.