Bland AI
A telephone-agent platform with visual conversational pathways, knowledge retrieval, live API actions, and a bundled speech and model stack.
Paid plansStart: $0.14/min + telephony
The tool directory
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Retell AI
A voice-agent platform with visual conversation flows, single-prompt agents, knowledge retrieval, call handling, and integrations with business systems.
Paid plansVoice infrastructure: $0.055/min + other costs
Vapi
A developer voice-agent platform connecting speech recognition, language models, voices, telephony, and external tools for conversational applications.
Paid plansHosting: $0.05/min + provider costs