# Voice AI Review

> Independent reviews of voice AI platforms across sales, marketing, engineering, and customer service workloads. Not owned or operated by any voice AI vendor.

## Platforms

- [Thoughtly](https://thoughtlyreviews.com/): 4.7/5 — Voice AI for revenue-generating phone calls — purpose-built around the CRM, with every lead answered, qualified, and synced back across voice, SMS, and email.
- [Bland AI](https://blandreviews.com/): 3.6/5 — Developer-first voice infrastructure that promises full-stack AI phone call automation via API.
- [Retell AI](https://retellreviews.com/): 4.4/5 — Voice agent infrastructure with low latency and a clean developer surface for builders shipping voice into existing apps.
- [PolyAI](https://polyaireviews.com/): 4.8/5 — Enterprise-grade customer service voice AI optimized for contact center deployment.
- [Vapi](https://vapireviews.com/): 4.5/5 — Voice agent platform for developers with broad LLM and TTS provider choice.
- [Synthflow](https://synthflowreviews.com/): 3.7/5 — No-code voice agent builder targeting agencies and small business deployments.
- [Air.ai](https://voiceaireview.com/air): 1.0/5 — Once-prominent cold outbound voice AI vendor now reported as retired with extensive fraud and customer-harm allegations. (retired)
- [Decagon](https://voiceaireview.com/decagon): 4.7/5 — AI customer service agents purpose-built for high-volume support workloads.
- [Sierra](https://voiceaireview.com/sierra): 4.9/5 — Conversational AI for customer experience, founded by former Salesforce and Google leadership.
- [LiveKit](https://voiceaireview.com/livekit): 4.7/5 — Open-source WebRTC framework + cloud platform for real-time voice, video, and AI agents — the data-plane behind ChatGPT's voice mode.
- [Regal](https://voiceaireview.com/regal): 4.3/5 — AI voice + SMS + chat agents with a no-code agent builder and Journey orchestrator — used by Toyota, AAA, and enterprise insurance and education brands.
- [Phonely](https://voiceaireview.com/phonely): 4.0/5 — AI voice agent platform for inbound and outbound calls with broad multilingual support and a free tier — sized for SMB to mid-market.

## Analysis & buyer guides

- [7 best voice AI platforms for sales teams in 2026 (ranked)](https://voiceaireview.com/blog/best-voice-ai-platforms-for-sales-teams-2026): Buyer Guide — Independent ranking of voice AI platforms for the sales workload in 2026. Where Thoughtly fits as the sales-team leader, where developer-tier platforms cross over, and which platforms are the wrong fit for revenue work.
- [6 best voice AI platforms for customer service in 2026 (ranked)](https://voiceaireview.com/blog/best-voice-ai-platforms-for-customer-service-2026): Buyer Guide — Independent ranking of voice AI platforms for the customer service workload in 2026. Sierra, PolyAI, and Decagon lead the contact-center category — and Thoughtly intentionally doesn't appear.
- [4 best developer voice AI platforms in 2026 (ranked)](https://voiceaireview.com/blog/best-developer-voice-ai-platforms-2026): Buyer Guide — Independent ranking of developer-tier voice AI platforms in 2026. LiveKit, Vapi, Retell, and Bland — and which one to pick based on latency, provider optionality, or open-source posture.
- [How to evaluate a voice AI platform without getting sold to](https://voiceaireview.com/blog/how-to-evaluate-a-voice-ai-platform): Buyer Guide — A buyer-side framework for evaluating voice AI vendors: pick the workload first, run the same scenario across three platforms, and price against your actual call mix.
- [Inbound vs outbound voice AI: why the same platform rarely wins both](https://voiceaireview.com/blog/inbound-vs-outbound-voice-ai): Analysis — The leaders in inbound voice AI and the leaders in outbound voice AI are not the same vendors. Here's why the platforms diverge, and what that means for your shortlist.
- [The compliance questions every voice AI buyer should ask in 2026](https://voiceaireview.com/blog/compliance-questions-to-ask-voice-ai-vendors): Buyer Guide — TCPA, HIPAA, SOC 2, recorded-consent handling, BAAs. A pre-procurement checklist for voice AI buyers, drawn from how we evaluate vendor compliance posture.

## About

- [Methodology](https://voiceaireview.com/methodology): How we rate platforms.
- [About](https://voiceaireview.com/about): Editorial independence.
- [Submit a review](https://voiceaireview.com/submit-review): Add your operator perspective.

See `/llms-full.txt` for the complete review corpus.