Apps
10 apps for AI voice agent platforms and vendors. Prices come from each vendor site.
Retell AIFeatured
Platform for building, testing and deploying AI voice agents that answer and make phone calls.
$10 free credits; pay as you go from $0.07-$0.31/min
VapiFeatured
Developer platform for building voice AI agents with your choice of speech, language and voice models.
$5 free credits; $0.05/min hosting plus model costs
Bland
Enterprise voice AI platform for phone agents that handle inbound and outbound calls at scale.
Free start with credits; from $0.14/min, team plans add a platform fee
Calendly
Scheduling software that voice agents and booking flows can use to put appointments on real calendars.
Free plan; paid plans from $10/seat/month
Coval
Testing and evaluation platform that simulates calls to check voice agents before and after launch.
From $100/month; 7-day free trial
Deepgram
Speech-to-text, text-to-speech and voice agent APIs built for real-time phone conversations.
$200 free credit, then pay as you go per minute
ElevenLabs
AI voice generator and agents platform with lifelike text-to-speech voices in many languages.
Free plan; paid subscriptions add credits and features
LiveKit
Open source framework and cloud for building real-time voice AI agents over phone and WebRTC.
Free plan; paid plans from $50/month plus usage
Synthflow
Enterprise AI voice agent platform for receptionists, appointment booking, IVR and customer service calls.
Enterprise contracts from $30,000 a year
Twilio Voice
Programmable voice API and phone numbers that connect AI agents to the phone network.
Free trial; pay-as-you-go per-minute rates
Published by VoiceAgents. How we check each voice AI vendor.