Voice AI Tools for Calls and Agents
Voice AI tools help businesses answer calls, qualify leads, schedule appointments, transcribe conversations, and automate phone workflows. The strongest use cases have repeatable call patterns and clear escalation rules.
Voice agents and conversational AI platforms for calls, qualification, scheduling, support, and audio workflows.
How to choose in this category
Use this category when missed calls, slow qualification, or phone support volume affects revenue.
Test voice quality, latency, interruptions, and escalation behavior.
Confirm call recording, consent, and compliance requirements.
Review CRM, calendar, and telephony integrations.
Related category guides
Search all 604 toolsVoice AI tools
Compare official links, pricing notes, business fit, and alternatives for each tool.
Retell AI
Itemized per-minute: infrastructure plus TTS plus LLM, with per-minute add-ons and per-line concurrency
Voice agents at $0.07-$0.31/min with itemized infra plus LLM pricing
Best for
Operators in healthcare, financial services, logistics, hospitality who want a productised voice platform, Teams that want itemised per-minute economics they can model in a spreadsheet before going live
Vapi
$0.05/min Vapi platform fee plus pass-through model and telephony costs, with per-line concurrency surcharge
Developer-first voice agent platform at $0.05/min platform fee plus model pass-through
Best for
Voice AI startups and YC-stage teams building branded voice products on top of best-of-breed models, Engineering teams that want STT, LLM, and TTS provider flexibility instead of a black-box bundle
Bland AI
Usage-based
Enterprise voice agents with one per-minute price and no pass-throughs
Best for
Healthcare networks needing HIPAA-grade voice automation, Insurance and finance ops handling regulated high-volume calls
Synthflow
Usage-based
Voice AI with in-house telephony and a la carte LLM pricing
Best for
BPOs and call centers automating tier-1 conversations, Mid-market healthcare and real estate ops
ElevenLabs Conversational AI
Free plan + paid plans
ElevenLabs' best-in-class voice, wrapped in an agent platform
Best for
Product teams already using ElevenLabs for TTS, Consumer apps needing natural multilingual voice
PolyAI
Contact sales
Voice agents that actually sound like your brand on the phone
Best for
Enterprise contact center leaders at consumer brands, CX teams replacing legacy IVR systems
Deepgram
Per-minute audio metering for transcription, per-1k-characters for TTS, with PAYG, Growth (prepaid annual), and Enterprise tiers; $200 signup credit.
Enterprise speech-to-text, text-to-speech, and voice-agent APIs metered by the minute.
Best for
Voice-AI product teams shipping conversational agents at production scale, Contact-center platforms needing low-latency streaming transcription
AssemblyAI
Per-hour audio billing for transcription and add-ons, per-minute for Voice Agent API, per-token pass-through for LLM Gateway; generous free trial then pay-as-you-go.
Universal-2 speech-to-text with async and real-time tiers, plus LLM-powered transcript understanding.
Best for
SaaS teams adding transcription and audio intelligence to existing products, Media, legal and education companies processing long-form recorded audio
Speechmatics
Free plan + paid plans
Multilingual speech-to-text that doesn't choke on accents or two people talking
Best for
Voice agent builders needing speaker diarization, Healthcare scribe and meeting note platforms
Murf
Usage-based
Cheap, decent voiceovers for video creators and a fast API for agents
Best for
Content creators and YouTube producers on a budget, L&D teams localizing training content across languages
Descript
Free plan + paid plans
Edit video and podcasts by editing the transcript
Best for
Podcasters and YouTubers who self-edit, Marketing teams producing regular video content in-house
Resemble AI
Usage-based
Voice cloning, watermarking, and deepfake detection from one vendor
Best for
Media and entertainment companies licensing AI voices, Trust and safety teams screening synthetic content
Hume AI
Free plan + paid plans
Voice AI that reads tone, not just words
Best for
Indie developers building voice companions and chatbots, Healthcare and wellness startups
Tavus
Free plan + paid plans
Build real-time video AI that talks back in under 500ms
Best for
Developers building interactive video products, Sales teams running personalized outbound video
HeyGen
Free plan + paid plans
Avatar videos in 175 languages without filming a thing
Best for
Marketing teams localizing video content globally, Sales orgs running personalized video at scale
Synthesia
Free plan + paid plans
The enterprise pick for AI avatar training videos
Best for
Enterprise L&D and training teams, Compliance officers in financial services and healthcare
Daily
Usage-based
WebRTC plumbing for video calls and voice AI agents, with Pipecat baked in
Best for
Developers shipping realtime audio/video features, Voice AI startups using Pipecat
Twilio
Usage-based
The pay-per-message API every dev reaches for when SMS or voice has to just work
Best for
Engineering teams needing programmable comms, Product companies adding 2FA or notifications
Aircall
Contact sales
The call-center phone that actually plays nice with your CRM
Best for
Mid-market sales teams on Salesforce or HubSpot, Support orgs using Zendesk or Intercom
Dialpad
Published pricing
The phone system that listens, transcribes, and coaches in real time
Best for
SMBs and mid-market wanting AI-native calling, Sales teams replacing separate Gong subscriptions
OpenPhone
Published pricing
A shared inbox for your business phone number - now called Quo
Best for
Small businesses replacing Google Voice, Home service and property management teams
RingCentral
Contact sales
The boring, reliable enterprise phone system - now with agentic AI bolted on
Best for
Enterprises with 200+ seats, Multinational companies needing global PSTN coverage
Zoom
Free plan + paid plans
The meeting tool that quietly became a full work platform
Best for
Companies already standardized on Zoom video, SMBs consolidating meetings + phone in one bill
Krisp
Free plan + paid plans
Kill background noise on any call, and now soften accents in real time
Best for
Remote workers in noisy environments, Contact centers with global agent pools
Dapta
Published pricing
Launch voice and chat agents without writing code, billed by credit
Best for
SMB owners in real estate, law, or home services who need 24/7 phone coverage, GoHighLevel agencies reselling AI receptionists to local business clients
Vozy
Contact sales
Enterprise voice AI built for Spanish-speaking banks and telcos
Best for
LATAM banks and insurers needing native Spanish voice AI with bank-grade compliance, Telco and utility customer service leaders cutting cost-per-contact at scale
Common questions about Voice AI
What are Voice AI tools used for?
Voice AI tools help businesses answer calls, qualify leads, schedule appointments, transcribe conversations, and automate phone workflows. The strongest use cases have repeatable call patterns and clear escalation rules.
Which Voice AI tools should a business compare first?
Start by reviewing Retell AI, Vapi, Bland AI, Synthflow, ElevenLabs Conversational AI, then compare pricing, implementation effort, integrations, and workflow ownership against your actual use case.
How should buyers choose between Voice AI vendors?
Use criteria such as Test voice quality, latency, interruptions, and escalation behavior; Confirm call recording, consent, and compliance requirements; Review CRM, calendar, and telephony integrations.