Use case · Outbound sales
Best voice agents for outbound sales and appointment-setting
These platforms make the calls: qualifying leads, booking appointments and following up at a volume a human team cannot match. If you are dialling out rather than answering, this is the shortlist.
What to look for: Look for batch calling, reliable booking write-backs to your calendar or CRM, and pricing that still works once you are placing thousands of calls.
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The most natural-sounding AI voice we have heard, whether you are voicing a video or putting it on a live phone line.
Cheap, good text-to-speech plus a genuinely all-in voice-agent rate from $0.07 a minute, under the SpeechifyAI brand.
Get a working phone agent live in days, not months, with the call handling built in and the AI brain your choice.
The speed specialist whose fast, natural speech is what keeps a live phone agent feeling real rather than laggy.
Build a phone agent exactly the way you want it, choosing each part yourself, if you have a developer to hand.
The open-source real-time stack that carries voice-agent audio, plus a framework to wire your own STT, LLM and voice.
The no-code voice-agent builder that went enterprise-only: public pricing is gone and contracts start at $30,000 a year.
OpenAI's speech-to-speech model and API for building your own voice agent, billed by audio tokens, not by the minute.
Open-source Python framework where you pick every voice-agent part, free to self-host, with Daily's cloud for scaling.
A voice that picks up how the caller is feeling and answers in kind, for warmer and more human conversations.
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Get the voice agent and the phone network it runs on from one provider, useful when you want billing in one place.
Run big outbound calling campaigns on one flat per-minute rate, best if you have engineers to set it up.
Enterprise text-to-speech built for high-stakes phone calls, where a mispronounced name loses the customer.
Fast, accurate speech-to-text to power high-volume voice apps, for teams happy to build on a developer API.
Cloud call-centre software with deep calling and CRM features, now adding AI voice agents as a per-minute add-on.
Enterprise speech-to-text with very broad language coverage and real on-prem options, for teams who self-host.
Enterprise omnichannel AI for voice and chat, used by airlines and carmakers, now owned by NICE. Quote-only, sales-led.
Accurate streaming speech-to-text with built-in audio intelligence, for teams who want the listening half done well.
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