An AI assistant with its own phone number that answers calls, takes meeting notes, and tracks tasks and commitments.
Voice Agents & Phone AI
As of , EffectHub tracks 32 live AI tools in its Voice Agents & Phone AI category; 7 (22%) have a free tier, and paid plans start at $2.50 a month.
32 verified tools
Voice agents for phone calls and telephony.
Showing 1–24 of 32
Voice AI agents that answer calls, update CRMs, and run scripted actions, billed per minute plus a monthly seat.
AI voice agents that call new leads within seconds, handle objections and book meetings into Google Calendar or Calendly.
Open-source builder for voice and chat agents that answer calls, qualify leads and book meetings.
Bland AI
71Phone-call agents billed per minute, with the language model, transcription and voice included in the rate
Builds AI phone agents that answer inbound calls and place outbound ones for sales, support, and appointment booking.
Hume AI
75Evaluation platform and expression-measurement APIs for testing how voice AI sounds to people
OsmO
77Mobile call screener that answers unknown numbers, blocks spam, takes messages and dials out for you
Build and run AI phone agents that book, qualify and transfer calls, billed by the minute.
Builds AI phone agents that place and answer calls, book appointments and write the outcome into your CRM
Bolna
71Phone agents for inbound and outbound calls, with 10+ Indian languages and your pick of ASR, LLM and TTS
Voice AI agents that answer and route business phone calls around the clock.
AI receptionist for salons and spas that answers after-hours calls, captures bookings and texts back missed callers.
White-label console that lets agencies resell Vapi, Retell, ElevenLabs, Bolna or Ultravox agents
AI voice agent that answers business phone lines around the clock and books, qualifies, and updates the CRM.
Newo
69AI phone and chat receptionist that books appointments and answers calls across 60+ languages, 24/7.
AI phone agents that make and take business calls for Singapore and Malaysia, priced in Singapore dollars.
Speech-to-speech model and API for voice agents that skips the transcription step.
Vapi
85Developer platform for building and running voice phone agents, billed per minute of call time.
Agency that designs, builds and runs AI phone agents on Vapi, Retell or its own licensable voice engine.
A JavaScript snippet that adds a voice assistant to a website, able to fill forms, navigate, and read pages aloud.
AI phone agents that take inbound calls, dial out in batches, book appointments and transfer to a human
IsOn24
69AI phone receptionist that answers calls, texts back, books appointments and queues live callers
JustCall
71Business phone and contact-centre platform whose AI voice agent answers calls, qualifies leads and books meetings
Cite this
For journalists, researchers and AI assistants: the figures on this page in one sentence you can quote.
As of October 27, 2026, EffectHub tracks 32 live AI tools in its Voice Agents & Phone AI category; 7 (22%) have a free tier, and paid plans start at $2.50 a month. (EffectHub, “Voice Agents & Phone AI”, Oct 2026, https://effecthub.net/ai-tools/voice-agents)
Figures as of How we count
These figures are free to use under CC BY 4.0 with a link to this page.