AI Voice Agent Tools — All Reviews
Every major platform reviewed and rated. Prices verified June 2026.
Retell AI
Lowest latency, best agency features
Retell AI is the leading voice agent orchestration platform for agencies and developers. It offers the industry's best latency (~800ms), a full agency sub-account model, and native Google Calendar integration. Best choice for most agency deployments.
★★★★
4.8/5
From $0.07/min
VAPI
Most flexible, API-first voice infrastructure
VAPI (Voice AI Platform Infrastructure) is the most customizable voice agent platform available. Its API-first design lets developers control every layer of the stack. Best for complex integrations, custom tool calling, and teams who want maximum control.
★★★★
4.6/5
From $0.05/min + LLM costs
Bland AI
Best for B2B outbound calling
Bland AI specializes in outbound AI calling for B2B sales and appointment setting. It includes built-in call scheduling, a robust pathway system for branching conversations, and strong white-label options. Note: outbound consumer calling requires strict TCPA compliance.
★★★★
4.3/5
From $0.09/min (all-inclusive)
Synthflow
Easiest setup, best for non-technical users
Synthflow is a no-code AI voice agent builder designed for non-technical users and SMBs. Its flat-rate pricing tiers and visual builder make it ideal for reselling to clients who want to manage their own agents. Backed by $7M Series A.
★★★★
4.2/5
From $29/mo
ElevenLabs
Best voice quality and voice cloning
ElevenLabs is the gold standard for AI voice synthesis. While not a full voice agent platform, it's the preferred voice layer for premium AI receptionist deployments. Its instant voice cloning allows businesses to deploy a branded voice in minutes.
★★★★
4.9/5
From $0
Deepgram
Best speech-to-text accuracy for voice agents
Deepgram provides the speech-to-text layer powering most production AI voice agents. Its Nova-3 model has industry-leading accuracy, especially for accented English, noisy environments, and medical/legal terminology.
★★★★
4.7/5
From $0.0043/min (Nova-3)
PolyAI
Enterprise voice AI for high-volume contact centers
PolyAI builds lifelike conversational voice agents that replace traditional IVR menus and resolve a large share of inbound customer-service calls for large enterprises in hospitality, financial services, healthcare, retail, and telecom. It runs on its own proprietary voice-tuned models (the Raven family) with retrieval-augmented grounding, integrates with major contact-center platforms on-prem or cloud, and supports dozens of languages. It is built for enterprise-scale deployments rather than single-location small businesses.
★★★
3.3/5
From Contact sales
Goodcall
Plug-and-play AI receptionist for local service businesses
Goodcall is a no-code AI phone agent built for small and local service businesses that answers inbound calls 24/7, captures leads, answers FAQs, and routes or follows up via SMS. Founded in 2021 by former Google speech-AI lead Bob Summers (grown out of Google's CallJoy/Area120 project), it emphasizes fast self-serve setup over deep customization, using a drag-and-drop flow builder and Cartesia's Sonic voice for low-latency speech. It's a strong fit for simple call-answering needs, but its rules-based flows, mostly Zapier-based integrations, and lack of a public API/white-label program limit how far agencies can customize or rebrand it.
★★★
3.6/5
From Starting at ~$79/mo per agent (≈$66/mo billed annually)
Slang.ai
Voice AI built for restaurant reservations and FAQs
Slang.ai is a restaurant-specific voice AI that answers the phone 24/7 to handle reservations, common guest questions (hours, location, parking, menu basics), and call routing. It integrates natively with hospitality systems like OpenTable, SevenRooms, Yelp, Fishbowl, and Tripleseat, and is sold as a polished, restaurant-tuned product rather than a general-purpose voice agent builder. Notably, it does not complete food orders over the phone — it texts callers an SMS link to your online ordering platform instead.
★★★
3.6/5
From Starting at $399/location/month
Cartesia
Ultra-low-latency voice engine for builders of AI agents
Cartesia is a voice-AI infrastructure company whose flagship Sonic text-to-speech model is built on state space models for ultra-low latency, with time-to-first-audio reported under ~100ms. It also offers the Ink speech-to-text model and, more recently, a "Line" voice-agent development platform, but at its core it is a developer-grade voice layer rather than a turnkey receptionist product. For agencies, it is the engine you plug into a voice stack (LiveKit, Pipecat, Vapi, Retell), not a finished product you hand to a local business.
★★★
3.9/5
From $0/mo
PlayAI (Play.ht)
A pioneering voice-AI platform — now discontinued after Meta's acquisition
PlayAI (formerly Play.ht) was a well-regarded text-to-speech, voice-cloning, and voice-agent platform that offered 800+ realistic AI voices and a low-latency TTS API used to build conversational phone agents. In July 2025 Meta acquired the roughly 35-person team into its Superintelligence Labs division; the public API went dark on July 26, 2025, new sign-ups stopped in August 2025, and the platform was permanently shut down on December 31, 2025, with accounts and voice clones deleted. For agencies building AI receptionists today it is effectively unavailable — included here as a reference and a cautionary tale about building on a single acquisition-risk vendor.
★
1.5/5
From $0