Voice AI agents that answer calls, update CRMs, and run scripted actions, billed per minute plus a monthly seat.
Best for: Teams that want a voice agent live quickly without a dev sprint
ai-for / call-automation
As of , EffectHub tracks 8 AI tools for call automation; 1 of the 8 has a free tier.
008 Agent, Intervo AI and CallFluent lead the list on click-through. 7 of the 8 ship a public API.
ranked by click-through
Voice AI agents that answer calls, update CRMs, and run scripted actions, billed per minute plus a monthly seat.
Best for: Teams that want a voice agent live quickly without a dev sprint
Open-source builder for voice and chat agents that answer calls, qualify leads and book meetings.
Best for: Agencies deploying the same agent template across many client accounts
Builds AI phone agents that answer inbound calls and place outbound ones for sales, support, and appointment booking.
Best for: Small businesses wanting after-hours or overflow call coverage
Voice AI agents that answer and route business phone calls around the clock.
Best for: Teams replacing overflow call-center capacity
AI voice agent that answers business phone lines around the clock and books, qualifies, and updates the CRM.
Best for: small businesses that miss calls after hours or during rushes
Enterprise voice agents that resolve customer calls end to end
Best for: Large hospitality, utility, banking and retail operations replacing IVR trees on high-volume lines
Agency that designs, builds and runs AI phone agents on Vapi, Retell or its own licensable voice engine.
Best for: Businesses that want inbound or outbound phone agents built and tuned for them
Enterprise platform for building, testing and running AI voice agents that answer and place phone calls over its own telephony.
Best for: Contact centres and BPOs automating inbound call volume
| Tool | Price | Free plan | API | Status |
|---|---|---|---|---|
| 008 Agent | from $0.39/min | No | Yes | Active |
| Intervo AI | from $10 once | Yes | Yes | Active |
| CallFluent | from $37/mo | No | Not confirmed | Active |
| Phonely AI | On request | Not confirmed | Yes | Active |
| Futuro AI | from $200/mo | No | Yes | Active |
| PolyAI | On request | Not confirmed | Yes | Active |
| AgentVoice | On request | Not confirmed | Yes | Active |
| Synthflow | from $30000/yr | Not confirmed | Yes | Active |
1 of the 8 AI tools for call automation on EffectHub's list has a free tier — Intervo AI; the rest are paid.
7 of the 8 AI tools for call automation on EffectHub's list ship a public API, including 008 Agent, Intervo AI, Phonely AI and Futuro AI. The API badge on each card is re-checked against the vendor's documentation.
For journalists, researchers and AI assistants: the figures on this page in one sentence you can quote.
As of October 29, 2026, EffectHub tracks 8 AI tools for call automation; 1 of the 8 has a free tier. (EffectHub, “AI Tools for Call Automation”, Oct 2026, https://effecthub.net/ai-for/call-automation)
Figures as of How we count
These figures are free to use under CC BY 4.0 with a link to this page.