Full Circle vs Retell AI
Full Circle: A self-serve AI agent builder where small businesses hire AI agents that learn the business and send every piece of work for approval. Retell AI: A platform for building voice and chat AI agents for phone calls and messaging.
Choose Full Circle if
Small-business owners who want ready-to-work AI employees for content, social, leads and reviews without building workflows.
Choose Retell AI if
Developers and agencies building phone agents who want to choose their own LLM and voice.
Side by side
| Feature | Full Circle | Retell AI |
|---|---|---|
| What it is | A self-serve AI agent builder where small businesses hire AI agents that learn the business and send every piece of work for approval. | A platform for building voice and chat AI agents for phone calls and messaging. |
| Type | AI agent builder | AI receptionist |
| Price | From $39/month | From $0/month |
| Free plan | No | No |
| Pricing notes | Starter $39/mo (1 agent, 800 credits), Pro $99/mo (3 agents, 2,200 credits), Business $249/mo (10 agents, 6,000 credits); hard monthly limits; extra credits $15; 2 months free yearly | Pay as you go from $0 with $10 in free credits and 20 free concurrent calls. Voice agents about $0.07-$0.31/min all-in depending on LLM/voice; chat from $0.002/message; phone numbers $2/mo. Enterprise custom. |
| Best for | Small-business owners who want ready-to-work AI employees for content, social, leads and reviews without building workflows. | Developers and agencies building phone agents who want to choose their own LLM and voice. |
| Technical skill needed | None | Developer-level |
| AI model | Anthropic Claude | Multiple vendors (OpenAI, Anthropic, Google, custom) |
Strengths and limitations
Full Circle
Strengths
- +Chat-first: you brief an agent like a new hire, no workflow canvas
- +Agents learn your business from your website and documents, and write in your voice
- +Nothing goes out without your approval; every action is logged
- +Agents run on schedules, publish to WordPress and brief each other
Limitations
- −No free plan
- −Fewer third-party app integrations than workflow tools like Zapier or n8n
- −Built for small-business work rather than custom engineering pipelines
Retell AI ↗
Strengths
- +Choice of LLMs from OpenAI, Anthropic and Google, or a custom LLM
- +Multiple TTS voice providers including ElevenLabs and Cartesia
- +$10 free credits and no platform fee
- +Add-ons for PII removal, guardrails and QA
Limitations
- −Per-minute cost varies with chosen LLM and voice
- −Many separate add-on fees to model
- −Aimed at builders rather than non-technical owners
Frequently asked questions
Is Full Circle free?
No. Full Circle has no free plan; from $39/month.
Is Retell AI free?
No. Retell AI has no free plan; from $0/month.
Which is cheaper, Full Circle or Retell AI?
Retell AI starts lower at $0/month, against $39/month for Full Circle. Compare what each plan includes, not just the entry price.
Who should choose Retell AI?
Developers and agencies building phone agents who want to choose their own LLM and voice.
Who should choose Full Circle?
Small-business owners who want ready-to-work AI employees for content, social, leads and reviews without building workflows.
More comparisons
See the best Retell AI alternatives →
Sources
Facts were checked against each vendor's own pages on 2026-11-01. Pricing changes often; confirm on the vendor's site before you buy.