# Alternatives to Ringly > Source: https://theagentsindex.com/ringly/alternatives (current datasheets, evidence-ranked) Candidates share the baseline category or are previously researched peers. Requirements, preserved strengths, explicit trade-offs and research coverage decide the order; paid tier does not. ## Shortlist ### 1. Vapi Developer platform for building, testing and deploying voice AI agents that make and receive phone calls. **Research coverage:** 35/35 criteria **Where it improves on Ringly:** - [Multi-agent: yes — Squads route one conversation across several specialised assistants with context-preserving handoffs.](https://docs.vapi.ai/quickstart/introduction) - [Claude: yes — Claude is selectable as the assistant's LLM, on Vapi's integration or your own Anthropic account.](https://docs.vapi.ai/providers/model/anthropic) - [Open models: yes — Open-weight models reach the pipeline through Groq, Together AI, Mistral, DeepSeek and OpenRouter, or a self-hosted server.](https://vapi.ai/platform) **Trade-offs against Ringly:** - No researched regression against the baseline. [View Vapi](https://theagentsindex.com/vapi) ### 2. Synthflow Enterprise voice AI platform with in-house telephony for inbound and outbound call automation. **Research coverage:** 35/35 criteria **Where it improves on Ringly:** - [Multi-agent: yes — Subflows act as specialised agents that a parent flow triggers for individual tasks.](https://synthflow.ai/) - [Agent permissions: yes — Flow logic, approved knowledge sources, end-call reasons and handoff triggers bound what an agent may say or do.](https://synthflow.ai/) - [Model choice: partial — You pick the model per agent, but only from Synthflow's list of GPT and Synthflow LLM options.](https://docs.synthflow.ai/general-configuration) **Trade-offs against Ringly:** - No researched regression against the baseline. [View Synthflow](https://theagentsindex.com/synthflow-ai) ### 3. ElevenLabs Agents Hosted platform for building voice and chat agents, with telephony, SDKs and a choice of LLM. **Research coverage:** 35/35 criteria **Where it improves on Ringly:** - [Multi-agent: yes — An orchestrator agent routes a live conversation to specialist agents on natural-language conditions, and transfers can be nested; the transcript carries across.](https://elevenlabs.io/docs/eleven-agents/customization/tools/system-tools/agent-transfer) - [Agent permissions: yes — Tool use is gated per MCP server and per tool: always ask, fine-grained (auto-approved, requires approval, disabled), or no approval at all.](https://elevenlabs.io/docs/eleven-agents/customization/tools/mcp) - [Claude: yes — Anthropic models are natively selectable in agent settings; a few older Claude models drop out in EU data-residency workspaces.](https://elevenlabs.io/docs/eleven-agents/customization/llm) **Trade-offs against Ringly:** - [Admin controls: partial — Guardrails constrain what an agent may say and per-tool approval constrains what it may do, but Guardrails is in Alpha and enabling MCP servers is not restricted to admins.](https://elevenlabs.io/docs/eleven-agents/best-practices/guardrails) [View ElevenLabs Agents](https://theagentsindex.com/elevenlabs-conversational-ai) ### 4. PolyAI Enterprise platform for building voice and chat agents that resolve customer calls, priced per minute. **Research coverage:** 35/35 criteria **Where it improves on Ringly:** - [Claude: yes — Claude is one of the third-party models you can run instead of Raven; the model docs list Claude options under the Amazon Bedrock provider tab, selectable per channel.](https://poly.ai/blog/agentic-dialog-platform-open-to-builders) - [Open models: partial — The model catalogue enumerates only Raven, OpenAI and Amazon Bedrock (Claude, Nova) with no open-weight option, but you can attach your own LLM endpoint.](https://docs.poly.ai/behavior/models/byom) - [Model choice: yes — You choose the model per channel in voice and chat configuration; Raven is the recommended default rather than the only option.](https://docs.poly.ai/behavior/models/model-use) **Trade-offs against Ringly:** - [Pooled budget: partial — Conversation volume draws on one account-level Subscription Volume of CX Tokens, but the Wren builder allowance is per person and not shared.](https://docs.poly.ai/wren/usage-and-limits) [View PolyAI](https://theagentsindex.com/polyai) ### 5. OmniDimension No-code platform for building voice AI agents and running them on phone, web chat, WhatsApp, email and SMS. **Research coverage:** 35/35 criteria **Where it improves on Ringly:** - [Multi-agent: partial — Workflows chain agent actions and can call sub-workflows, so several agents run in sequence, but the docs describe no agent-to-agent handoff or shared-state orchestration.](https://docs.omnidim.io/docs/workflows) - [Open models: yes — Open-weight families are selectable through the OpenRouter and Bedrock entries in the catalogue, so you are not confined to closed frontier models.](https://omnidim.io/pricing) - [Model choice: yes — You choose the speech-to-text, LLM and text-to-speech provider per agent and may mix them freely; the vendor does not pin you to one stack.](https://omnidim.io/pricing) **Trade-offs against Ringly:** - [Admin controls: partial — Real per-user controls exist only for reseller accounts, which can switch dashboard menus on or off per client and cap their concurrency; ordinary team plans have no documented roles or permission settings, and agent limits are set per agent instead.](https://docs.omnidim.io/docs/api-reference/reseller/setUserAccessControl) [View OmniDimension](https://theagentsindex.com/omnidimension) ### 6. Retell AI Platform for building, testing and deploying AI voice and chat agents on phone, web and SMS, billed per minute. **Research coverage:** 34/35 criteria **Where it improves on Ringly:** - [Multi-agent: yes — Agent Transfer (agent swap) hands a live call from one AI agent to another with full transcript inherited; subagent nodes attach tool-using agents inside a flow.](https://docs.retellai.com/build/conversation-flow/transfer-agent-node) - [Claude: yes — Claude Sonnet and Haiku models are selectable for voice agents, priced per minute, and for chat agents per AI message.](https://www.retellai.com/pricing) - [Open models: partial — The hosted model menu enumerates only OpenAI, Anthropic and Google models, so no open-weight model is offered, but the custom LLM WebSocket path exists precisely so you can host one yourself.](https://docs.retellai.com/integrate-llm/overview) **Trade-offs against Ringly:** - [Admin controls: partial — Role-based access control is sold as an Enterprise line, marked absent for pay-as-you-go in the plan table, yet the docs describe Admin/Developer/Member roles with no tier restriction; API keys can be scoped read or edit on any plan. Contradiction recorded in notes.](https://www.retellai.com/pricing) [View Retell AI](https://theagentsindex.com/retell-ai) ## Method Unknown data is never treated as a benefit or a trade-off. Featured placement is labelled but cannot alter recommendation order.