Top 6 of 18 researched candidates
Alternatives to Telnyx Voice AI Agents
Find a better fit for what you need. Compare alternatives to Telnyx Voice AI Agents with sourced features, strengths and trade-offs side by side.
On this page
Your reason for switching
What needs to be different?
Choose up to three requirements, or see the closest matches now ↓.
Evidence-backed shortlist
Closest researched alternatives to Telnyx Voice AI Agents
Ordered by the requirements met, strengths preserved, explicit trade-offs and research coverage. Sponsorship does not enter the order.
- 01
ElevenLabs Agents
Hosted platform for building voice and chat agents, with telephony, SDKs and a choice of LLM.
From FreeWhy it's on this listDone-for-you service · PartialSelf-serve software you run, but enterprises can buy ElevenLabs Forward Deployed Engineers who scope, build and stabilise the deployment; no price is published.Evidence ↗
Where it improves on Telnyx Voice AI Agents
- +Agent permissions · YesTool use is gated per MCP server and per tool: always ask, fine-grained (auto-approved, requires approval, disabled), or no approval at all.Evidence ↗
- +GPT · YesOpenAI models are natively supported and are the one provider family the vendor says stays fully available under EU data residency.Evidence ↗
Trade-offs against Telnyx Voice AI Agents
- −In your editor · NoThe vendor enumerates its surfaces as web widgets, mobile apps, phone systems and custom integrations; no editor or IDE extension appears in that list.Evidence ↗
- −Audit log · PartialOCSF-schema logs over 100 administrative endpoints, pullable into a SIEM, but gated on Enterprise tier plus an API key holding audit_log_read.Evidence ↗
- −Single sign-on · PartialSAML and OIDC with domain verification, plus SCIM provisioning, all Enterprise-only; SAML is service-provider-initiated only and Entra over OIDC is discouraged.Evidence ↗
35/35 researched criteria - 02
Vapi
Developer platform for building, testing and deploying voice AI agents that make and receive phone calls.
From $0.05/minuteWhy it's on this listDone-for-you service · PartialYou build and run the agent yourself; the Scale contract adds an embedded Vapi engineer for the go-live, not a done-for-you build.Evidence ↗
Where it improves on Telnyx Voice AI Agents
- +GPT · YesOpenAI GPT models are selectable as the assistant's LLM.Evidence ↗
- +Self-hosted · PartialSelf-serve is hosted only; on-premise is offered to large enterprises, and the orchestration layer otherwise never leaves Vapi.Evidence ↗
Trade-offs against Telnyx Voice AI Agents
- −Audit log · PartialThe dashboard keeps org-wide API, call and webhook logs and assistant version history; no member-action audit trail is documented.Evidence ↗
- −Single sign-on · PartialSAML 2.0 or OIDC with any IdP, but enterprise-only and without SCIM provisioning; the Build column shows a dash.Evidence ↗
- −Certifications · PartialSOC 2 Type II and a HIPAA BAA sit in the Scale contract, and the plan table shows SOC2 only in that column; HIPAA mode is a $2,000/month add-on on either plan.Evidence ↗
35/35 researched criteria - 03
PolyAI
Enterprise platform for building voice and chat agents that resolve customer calls, priced per minute.
Why it's on this listDone-for-you service · PartialSelf-serve software plus vendor-delivered work: PolyAI builds and maintains managed dashboards, configures managed-service integrations, and runs an enterprise build of roughly six weeks.Evidence ↗
Where it improves on Telnyx Voice AI Agents
- +GPT · YesOpenAI GPT is one of the third-party models you can run instead of Raven; the model docs list GPT options under the OpenAI provider tab, selectable per channel.Evidence ↗
- +In your editor · YesThe ADK edits agent resources as local files in any editor, and Builder MCP plugs the same workflow into Cursor, Claude Code, Claude Desktop and Codex.Evidence ↗
Trade-offs against Telnyx Voice AI Agents
- −Multi-agent · NoThe only 'team of agents' feature is assigning several TTS voices to one agent; no coordination between multiple agents on a single task is documented, and the build assistant works one branch at a time.Evidence ↗
- −Open models · PartialThe model catalogue enumerates only Raven, OpenAI and Amazon Bedrock (Claude, Nova) with no open-weight option, but you can attach your own LLM endpoint.Evidence ↗
- −Pooled budget · PartialConversation volume draws on one account-level Subscription Volume of CX Tokens, but the Wren builder allowance is per person and not shared.Evidence ↗
35/35 researched criteria - 04
Cartesia
Real-time speech models and a managed runtime for production phone and web voice agents.
From FreeWhy it's on this listGPT · YesOpenAI GPT models appear in the same supported-models table.Evidence ↗
Where it improves on Telnyx Voice AI Agents
- +Self-hosted · PartialOn-premise or VPC model deployment is sales-gated; separately, agent reasoning code can run on your own servers with Cartesia connecting to your URL.Evidence ↗
- +Open source · PartialThe official JS/TS and Python client SDKs are public repositories on Cartesia's GitHub; the Sonic and Ink models and the agent runtime are not.Evidence ↗
Trade-offs against Telnyx Voice AI Agents
- −Multi-agent · NoSystem tools enumerate three slots: end call, DTMF, and transfer to an E.164 phone number. An agent therefore hands off to a number, not to another Cartesia agent.Evidence ↗
- −Open models · PartialThe LLM layer routes through LiteLLM to 100+ providers, but the vendor names only Anthropic, OpenAI and Google, and its own speech models are API-only.Evidence ↗
- −Bring your own key · PartialNo bring-your-own LLM key: Cartesia bills the LLM itself. You can bring your own carrier via SIP trunking and host the agent's reasoning code yourself.Evidence ↗
35/35 researched criteria - 05
Retell AI
Platform for building, testing and deploying AI voice and chat agents on phone, web and SMS, billed per minute.
From $0.07/minuteWhy it's on this listDone-for-you service · PartialYou run the software self-serve; Retell sells dedicated implementation support as an Enterprise add-on rather than a managed service, and points elsewhere to certified partners.Evidence ↗
Where it improves on Telnyx Voice AI Agents
- +GPT · YesGPT models dominate the model menu, with both the standard STT-LLM-TTS path and GPT Realtime speech-to-speech priced per minute.Evidence ↗
- +Self-hosted · PartialOn-prem deployment is an Enterprise offering; on pay-as-you-go the only self-hosted piece is your own LLM behind the custom-LLM WebSocket, or your own SIP telephony.Evidence ↗
Trade-offs against Telnyx Voice AI Agents
- −Open models · PartialThe 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.Evidence ↗
- −On the command line · NoThe docs enumerate every way to drive Retell: dashboard, REST API, Node/Python SDKs and MCP server. No command-line tool is among them.Evidence ↗
- −Audit log · PartialAgent configuration changes are recorded as immutable published versions with browsable history and side-by-side comparison; no workspace-level log of administrative actions such as role changes or key rotation is documented.Evidence ↗
34/35 researched criteria · 1 not established - 06
AudioCodes Live Hub
Self-service SaaS for building voice AI agents and connecting them to SIP trunks, Teams, WhatsApp and WebRTC.
From $0.05/minuteWhy it's on this listDone-for-you service · PartialCore product is self-service software you operate; AudioCodes will sell onboarding and integration help, but only as separately purchased hours.Evidence ↗
Where it improves on Telnyx Voice AI Agents
- +GPT · YesOpenAI text and realtime models are pre-deployed and resold per token by Live Hub, so no OpenAI account of your own is required.Evidence ↗
- +Free tier · YesSelf-signup with no card and no sales call, seeded with $10 of credit; the trial account is deleted three months after creation.Evidence ↗
Trade-offs against Telnyx Voice AI Agents
- −Claude · PartialAnthropic is reachable only as a bring-your-own-key custom model; the pre-deployed catalogue Live Hub bills for is OpenAI and Google only.Evidence ↗
- −Open models · PartialOpen-weight models run only as custom models on your own Groq, Cerebras or OpenAI keys; none appear in the pre-deployed list Live Hub hosts.Evidence ↗
- −In your editor · NoNo editor plug-in exists; the two supported external clients are Claude Code and Claude Desktop over MCP, and neither is an IDE.Evidence ↗
33/35 researched criteria · 2 not established
Full datasheet
Compare Telnyx Voice AI Agents with the shortlist
Replace any candidate, show every criterion, or keep only differences and unknowns.
Compare alternatives to Telnyx Voice AI Agents
Keep Telnyx Voice AI Agents as the baseline and choose up to three alternatives. Differences and unanswered criteria appear first.
The digest
Done comparing? Watch the field move. Which agents actually ship, one short email, every Tuesday.
Advertisement
Sponsor this page. Alternatives pages are read by buyers actively choosing an agent, first-party inventory, clearly labelled, sold by the week.
Sponsor this page →Featured · top of your category →Method
How the shortlist is calculated
Comparable first. We consider listings in the same category as Telnyx Voice AI Agents and alternatives previously researched for this page.
Requirements first. We prioritise your selected needs, then shared strengths, fewer documented trade-offs, more complete research and finally alphabetical order.
Unknown remains unknown. Missing evidence is never converted into a benefit or a trade-off. Every improvement shown above comes from the same sourced criterion as the listing.
Independent order. Payment does not affect selection or ranking. Paid placements are labelled Advertisement.
Where next? Back to the full research, deeper into the category, or get your own agent into the index.
Advertise here
Reach buyers mid-decision. Reach builders choosing their next agent. Promote your brand with a display placement or bring your listing into focus with Featured.
Explore owner options →Advertise on this page →The digestFree
Which agents actually ship.
What we re-checked, what got added, and one number from the index. Tuesdays.
One-click unsubscribe