# PolyAI — The pre-LLM-era enterprise voice AI incumbent — $750M-valued, 200+ enterprise customers — that opened a genuine self-serve, free-to-start tier in May 2026.

> Source: The Agents Index — https://theagentsindex.com/polyai (structured, researched, re-verified)
> Facts last verified: 2026-07-25

PolyAI is a London-founded (2017) enterprise voice AI company that grew out of Cambridge machine-learning research, built by co-founders Nikola Mrkšić (CEO), Shawn Wen and Eddy Su. It raised an $86M Series D in December 2025 (co-led by Georgian, Hedosophia and Khosla Ventures, with NVIDIA’s NVentures also participating) at a $750M valuation — up from $500M in May 2024 — pushing total funding past $200M. Its Agentic Dialog Platform, built on the proprietary Raven dialog model, now also supports GPT-5, Claude and Gemini as reasoning engines and runs thousands of live phone and chat voice-agent deployments across 75+ languages in 25+ countries for 200+ enterprise customers, including PG&E, UniCredit, Caesars Entertainment, Marriott and FedEx. Until May 2026, access was enterprise, sales-led only; PolyAI then opened a genuine self-serve tier — free for the first two months, sign-up requiring only an email address.

| Fact | Value |
| --- | --- |
| Website | https://poly.ai |
| API | Yes |
| Best for | Teams that want a proven, enterprise-scale, compliance-certified voice AI vendor and are willing to start on its new self-serve free tier before deciding whether a larger, sales-led enterprise engagement makes sense. |
| Not for | Teams that need firm, public pricing for budgeting beyond the first two months today — PolyAI has not disclosed what its self-serve tier costs after the free period, and its largest deployments still require a sales-led enterprise engagement. |

## Verdict

PolyAI is the pre-LLM-era incumbent of the voice-agent category — founded in 2017, years before Vapi, Retell AI, Bland AI or ElevenLabs Conversational AI existed — with real enterprise scale to show for it: 200+ customers, thousands of live deployments, a $750M valuation, and a Forrester study (vendor-commissioned, but methodologically disclosed) modeling 391% three-year ROI for a composite enterprise customer. Until May 2026 it was also the most closed platform in this category — sales-led only, no public price, no self-serve account. That changed: PolyAI now offers a genuine self-serve tier, free for two months from just an email address, with both a no-code builder and a real developer API (ADK). The catch is that PolyAI has not disclosed what happens once that free period ends, and its flagship enterprise deployments (like PG&E’s 16M-call-a-year operation) still run through a separate, custom-quoted sales engagement. Pick PolyAI if you want proven enterprise scale with a low-friction way to try it first; go in aware that the free tier’s long-run economics are still a question mark.

## Strengths and weaknesses

- ✓ Deep enterprise proof: 200+ named customers, thousands of live deployments across 75+ languages in 25+ countries, and a $750M valuation (December 2025 Series D) with NVIDIA’s NVentures among the backers.
- ✓ A genuine self-serve tier as of May 2026 — free for two months from just an email address, via a no-code Poly Agent Builder or a real developer API (ADK with self-serve keys) — a real change from its previous sales-only-only access.
- ✓ A vendor-commissioned but methodologically disclosed Forrester Total Economic Impact study modeling 391% three-year ROI ($11.3M NPV, under-6-month payback) for a composite enterprise customer, including named, quantified benefit categories rather than one bare percentage.
- ✗ What happens after the 2-month self-serve free period is not publicly disclosed anywhere — no self-serve rate card, so budgeting past month two means either guessing or starting a sales conversation.
- ✗ PolyAI’s own reported GAAP financials show operating losses widening to $26.6M (from $23.8M) against $15M revenue for the 12 months to January 31, 2025 — spending well ahead of reported revenue even as forward ARR guidance (a less-audited metric) is projected near $40M.
- ✗ The Forrester ROI figures come from a PolyAI-commissioned study interviewing just 4 customers combined into one hypothetical composite organization — directionally useful, but not a broad independent sample, and its 5.0/5 G2 rating rests on a thin sample of only about 12 reviews.
- ⚠ The self-serve free tier is time-boxed to two months with no published rate for after that — real budgeting still requires either waiting to be billed or a sales conversation.
- ⚠ Enterprise-scale deployments (the kind PolyAI is best proven at) still run through a separate, custom-quoted, sales-led engagement rather than the new self-serve on-ramp.

## Key features

- **Raven dialog model, now multi-model** — PolyAI’s proprietary Raven model, trained on 1B+ enterprise conversations, now runs alongside third-party reasoning models (GPT-5, Claude, Gemini) since the May 2026 platform opening.
- **Poly Agent Builder (no-code)** — Describe a use case in natural language and the builder configures the agent, knowledge base and conversation flows automatically — production-ready in a claimed under 10 minutes.
- **Agent Development Kit (ADK), self-serve** — A CLI and Python package with self-serve API keys, native integrations and a Git-based workflow — build, version and deploy agents from your own IDE without a sales call.
- **Connect Portal integrations** — 130+ pre-built telephony, CRM, knowledge-base and productivity integrations via a self-serve portal with managed OAuth 2.0 and automatic health-checks.

## Use cases

- **High-volume regulated-industry phone support** — A utility or bank routes account inquiries, fraud alerts or outage calls through a PolyAI agent to absorb extreme call-volume spikes — PG&E’s deployment handles 16M calls/year and tens of thousands per day during emergencies, with 67% containment and 35,000 labor hours saved.
- **Self-serve prototype before an enterprise commitment** — A team signs up with just an email, uses Poly Agent Builder to configure a working agent in minutes on the free two-month tier, and evaluates it before deciding whether to pursue a larger, sales-led enterprise deployment.
- **Developer-built custom voice agent** — An engineering team uses the self-serve ADK to build and deploy a voice agent from their own IDE, wiring in one of 130+ Connect Portal integrations rather than working through PolyAI’s enterprise sales process.

## Integrations

Telephony/voice routing, CRM & knowledge, productivity/collaboration and vertical systems — 130+ pre-built connectors via the self-serve Connect Portal (managed OAuth 2.0, automatic health-checks) · Reasoning models — the proprietary Raven model, or GPT-5, Claude and Gemini as of the May 2026 platform opening · Developer tooling — self-serve Agent Development Kit (CLI + Python), Git-based local development workflow

## Sources

- https://poly.ai/
- https://poly.ai/pricing
- https://poly.ai/about
- https://poly.ai/case-studies/pge/
- https://poly.ai/integrations
- https://www.forbes.com/sites/iainmartin/2025/12/15/polyai-raises-86-million-as-fight-to-answer-calls-with-ai-heats-up/
- https://www.prnewswire.com/news-releases/polyai-opens-its-agentic-dialog-platform-making-the-tech-behind-complex-conversations-for-hundreds-of-enterprises-available-to-every-builder-302774666.html
- https://www.cmswire.com/customer-experience/polyai-makes-enterprise-conversational-ai-self-serve/
- https://tei.forrester.com/go/polyAI/PolyAITEI/
- https://www.g2.com/products/polyai/reviews?qs=pros-and-cons