Telnyx Voice AI Agents

Best for: Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt); Teams needing broad API coverage out of the box

Avoid if: You want to try it free before paying

Pricing model

Usage-based [2]telnyx.com/pricing/conversational-ai“$0.05 / minute for real-time interaction and orchestration between the Voice AI Agent and callers”telnyx.com/pricing/conversational-ai“Call Control: $0.002 / minute; WebRTC: $0.002 / minute”

Published pricing

✓ Yes [3]telnyx.com/pricing/conversational-ai“Conversational AI Base Rate: $0.05 / minute for real-time interaction and orchestration”

Free tier

✗ No [4]developers.telnyx.com/docs/account-setup/levels-and-capabilities/trial“USD $5 in testing credit is provided to trial accounts.”

Self-serve signup

✓ Yes

Requires sales call

✗ No

Enterprise plan

✓ Yes [5]telnyx.com/pricing/conversational-ai“Volume-based contracts available with discounted rates and dedicated support”

• Built-in telephony
• Outbound calling
• BYO models
• Multilingual

Supported actions

realtime_conversation, inbound_telephony, outbound_telephony, sip_trunking, call_transfer, function_calling, tool_calling, interruption_handling, byo_llm, byo_voice, call_recording, web_widget, webrtc, speech_to_text, text_to_speech, knowledge_base, batch_calling, mcp_integration, dtmf_handling, noise_suppression, voicemail_detection, answering_machine_detection, multi_participant_calls, stir_shaken_attestation, conversation_history, dynamic_variables [6]telnyx.com/products/voice-ai“Bring-your-own (BYO) LLM, TTS, and STT models with no vendor lock-in”telnyx.com/pricing/conversational-ai“Speech-to-Text (STT): Included at no additional cost; Text-to-Speech (TTS) - Telnyx Voices: All included”

Regions

45+ countries with licensed carrier operations, United States, European Union, APAC, Latin America [7]telnyx.com/products/voice-ai“Licensed carrier in 45+ countries”

Languages

80+ languages and dialects (per product page), 100+ languages supported across STT (per STT product page) [8]telnyx.com/products/voice-ai“80+ languages and dialects”telnyx.com/products/speech-to-text“100+ languages on infrastructure built for real-time voice”

Input types

PSTN phone call, SIP, WebRTC, MMS (image during voice call)

Output types

audio stream, call transcript, webhook events, call recording, conversation insights, structured conversation history

Webhooks

✓ Yes [9]developers.telnyx.com/docs/voice/programmable-voice/voice-api-webhooks“call.initiated, call.answered, call.hangup, call.bridged, call.recording.saved, call.transcription, streaming.started, streaming.stopped”

Sandbox / test mode

✗ No [10]developers.telnyx.com/docs/account-setup/levels-and-capabilities/trial“The documentation provided focuses on trial account restrictions rather than sandbox environment specifics. No dedicated sandbox environment is mentioned.”

SDK languages

Node.js, Python, PHP, Java, Ruby, Go [11]telnyx.com/pricing/conversational-ai“Telnyx provides official server-side SDKs for Node.js, Python, PHP, Java, Ruby, Go”

MCP server

✓ Yes [12]telnyx.com/release-notes/local-mcp-server“Run Telnyx locally with the MCP Server”developers.telnyx.com/development/mcp/local-mcp“Telnyx Local Model Context Protocol (MCP) Server”

SOC 2

SOC 2 Type II [13]telnyx.com/legal/technical-organizational-security-practices“SOC 2 Type II & Type III (Security, Confidentiality, & Availability) — applies to: Programmable Voice, Programmable Messaging, Video, Wireless”support.telnyx.com/en/articles/12397834-understanding-telnyx-soc-compliance-and-certifications“SOC 2 Type II: Assesses whether those controls operate effectively over a defined period”

HIPAA

✓ Yes [14]support.telnyx.com/en/articles/3347891-hipaa-baas-and-the-conduit-exception“In general, Telnyx's services fall within this conduit exception under HIPAA, and therefore there is no need for Telnyx to sign a BAA. However, Telnyx is always happy to further discuss.”telnyx.com/products/voice-ai“compliance with GDPR, PCI, HIPAA and more, wherever you're located”

GDPR

✓ Yes [15]telnyx.com/products/voice-ai“compliance with GDPR, PCI, HIPAA and more, wherever you're located”telnyx.com/legal/technical-organizational-security-practices“Telnyx complies with data privacy laws and ensures that personal data is processed according to legal obligations.”

ISO 27001

✓ Yes [16]telnyx.com/release-notes/iso-iec-certifications“ISO/IEC 27001:2013 — Status: Maintained compliance (passed 1st Surveillance Audit since our initial certification last year). Scope: Development and maintenance of communication and connectivity platform solutions.”telnyx.com/legal/technical-organizational-security-practices“ISO 27001:2013 — applies to Programmable Voice, Programmable Messaging, Video, and Wireless services.”

PCI DSS

✓ Yes [17]telnyx.com/products/voice-ai“compliance with GDPR, PCI, HIPAA and more, wherever you're located”telnyx.com/resources/soc-2-voice-ai-agents“Telnyx: SOC 2 Type II, HIPAA, PCI DSS Compliant, ISO 27001, and GDPR with EU-deployed infrastructure”

Published SLA

✓ Yes [18]telnyx.com/products/voice-ai“One platform, one SLA”

Rate limits

Trial accounts: 2 concurrent outbound calls, 10 min/call max, 100 outbound calls/day, 10/hour. Level 2 verification: 10 concurrent calls. Inbound/outbound channel limits are configurable per application; paid accounts may request higher limits via support. [19]support.telnyx.com/en/articles/1130717-limits-on-concurrent-outbound-calls“Upon Level 2 verification approval, the limit increases to 10 concurrent calls. For limits beyond 100 channels, you can reach out to support@telnyx.com to increase your limit.”developers.telnyx.com/docs/account-setup/levels-and-capabilities/trial“Limited to 2 concurrent outbound calls across all connection instances. Limited to a maximum of 10 minutes per call. Maximum 100 outbound calls per day; 10 per hour.”

Known restrictions

Trial accounts limited to $5 credit, 2 concurrent outbound calls, 10 min/call max, 100 outbound calls/day, No dedicated sandbox environment - testing done in live environment with trial account, Machine-generated voices on trial accounts require abuse disclaimer prepended, BYO third-party TTS (ElevenLabs, Azure) billed via bring-your-own-key, not through Telnyx, HIPAA: Telnyx claims conduit exception (no BAA required) but will discuss BAA with customers on request, STT included in Voice AI base rate; premium TTS voices (non-Telnyx) incur additional per-character fees

• Docs
• OpenAPI spec
• llms.txt
• Status page

Docs rendering: static · markdown variants served · llms.txt present

API style

rest

Base URL

https://api.telnyx.com/v2

Version

v2

Versioning

url

Stability

ga

Auth methods

api_key

Error format

vendor-specific

Webhook signing

ed25519

Rate limit

2 / concurrent calls

SDKs

• Node.js telnyx · repo
• Python telnyx · repo
• PHP telnyx/telnyx-php · repo
• Java com.telnyx.sdk:telnyx · repo
• Ruby telnyx · repo
• Go github.com/team-telnyx/telnyx-go · repo

• Auth docs
• Quickstart
• MCP server
• Webhook events

Launched

2009-01-01

Notable customers

Dialpad, Alibaba, AudioCodes, UJET, Grupo Bimbo, Teletext Holidays

• ElevenLabs Conversational AI (ElevenAgents)

  "Deploy human-like Conversational AI in minutes. ElevenLabs delivers low latency interactions in dozens of languages with enterprise-grade security."

  Hybrid · free tier · public pricing · self-serve

• OpenAI Realtime API (gpt-realtime)

  "The Realtime API enables low-latency, bidirectional audio communication for building voice agents and audio applications."

  Usage · public pricing · self-serve

• Twilio ConversationRelay

  "Twilio's Conversation Relay empowers you to build powerful AI voice experiences for your customers. Let Twilio handle the heavy lifting of speech recognition, text-to-speech, and voice synthesis."

  Usage · public pricing · self-serve

• Vapi

  "Build and deploy voice agents that deliver the outcomes you want at the scale your customers need."

  Usage · free tier · public pricing · self-serve

• Cartesia Line

  "Turn any text agent into a world-class conversational agent, deployed anywhere."

  Hybrid · free tier · public pricing · self-serve

• Pipecat Cloud (Daily)

  "The fastest path to production voice AI" - a managed hosting platform for deploying and scaling Pipecat agents in production with built-in infrastructure.

  Usage · public pricing · self-serve

Telnyx Voice AI Agents alternatives · Telnyx Voice AI Agents vs ElevenLabs Conversational AI (ElevenAgents) · All Realtime Voice Agent APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: telnyx.com
2. ↑Pricing model: telnyx.com · telnyx.com
3. ↑Published pricing: telnyx.com
4. ↑Free tier: developers.telnyx.com
5. ↑Enterprise plan: telnyx.com
6. ↑Supported actions: telnyx.com · telnyx.com
7. ↑Regions: telnyx.com
8. ↑Languages: telnyx.com · telnyx.com
9. ↑Webhooks: developers.telnyx.com
10. ↑Sandbox: developers.telnyx.com
11. ↑SDK languages: telnyx.com
12. ↑MCP server: telnyx.com · developers.telnyx.com
13. ↑SOC 2: telnyx.com · support.telnyx.com
14. ↑HIPAA: support.telnyx.com · telnyx.com
15. ↑GDPR: telnyx.com · telnyx.com
16. ↑ISO 27001: telnyx.com · telnyx.com
17. ↑PCI DSS: telnyx.com · telnyx.com
18. ↑Published SLA: telnyx.com
19. ↑Rate limits: support.telnyx.com · developers.telnyx.com

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-21 Capabilities: {} → {"byo_models":true,"multilingual":true,"outbound_calling":true,"telephony_inclu…
2. 2026-06-21 Summary Md: (none) → Telnyx Voice AI Agents is a carrier-grade platform for building inbound and out…
3. 2026-06-21 Score Setup Speed: (none) → 60
4. 2026-06-21 Score Docs Quality: (none) → 60
5. 2026-06-21 Score Procurement Friction: (none) → 85
6. 2026-06-21 Score Agent Friendliness: (none) → 80
7. 2026-06-21 Best For: (none) → Regulated or enterprise workloads - compliance attestations and an enterprise p…
8. 2026-06-21 Avoid If: (none) → You want to try it free before paying
9. 2026-06-21 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
10. 2026-06-21 Score Trust Readiness: (none) → 100
11. 2026-06-21 Score Pricing Transparency: (none) → 85
12. 2026-06-21 Docs URL: (none) → https://developers.telnyx.com/docs/overview
13. 2026-06-21 Llms Txt Present: (none) → Yes
14. 2026-06-21 Llms Txt URL: (none) → https://telnyx.com/llms.txt
15. 2026-06-21 Rendering: (none) → static
16. 2026-06-21 Has Structured Data: (none) → Yes
17. 2026-06-21 Robots Allows Agents: (none) → No
18. 2026-06-21 Openapi Spec URL: (none) → https://telnyx.com/openapi.json
19. 2026-06-21 Status Page URL: (none) → https://status.telnyx.com
20. 2026-06-21 Markdown Docs Served: (none) → Yes
21. 2026-06-21 Markdown Docs URL: (none) → https://telnyx.com/products/voice-ai.md
22. 2026-06-21 Output Types: set to audio stream, call transcript, webhook events, call recording, conversation ins…
23. 2026-06-21 Webhooks Supported: set to Yes
24. 2026-06-21 Sandbox Available: set to No
25. 2026-06-21 SDK Languages: set to Node.js, Python, PHP, Java, Ruby, Go
26. 2026-06-21 SDK Packages: set to Node.js, Python, PHP, Java, Ruby, Go
27. 2026-06-21 MCP Server Available: set to Yes
28. 2026-06-21 Pricing Model: set to usage_based
29. 2026-06-21 Has Published Pricing: set to Yes
30. 2026-06-21 Free Tier Available: set to No
31. 2026-06-21 Self Serve Signup: set to Yes
32. 2026-06-21 Requires Sales Call: set to No
33. 2026-06-21 Enterprise Plan Available: set to Yes
34. 2026-06-21 SOC 2: set to type_2
35. 2026-06-21 HIPAA: set to Yes
36. 2026-06-21 GDPR: set to Yes
37. 2026-06-21 ISO 27001: set to Yes
38. 2026-06-21 PCI DSS: set to Yes
39. 2026-06-21 SLA Published: set to Yes
40. 2026-06-21 Data Retention Policy URL: set to https://telnyx.com/privacy-policy
41. 2026-06-21 Documented Rate Limits: set to Trial accounts: 2 concurrent outbound calls, 10 min/call max, 100 outbound call…
42. 2026-06-21 Rate Limit Requests: set to 2
43. 2026-06-21 Rate Limit Window: set to concurrent calls
44. 2026-06-21 Known Restrictions: set to Trial accounts limited to $5 credit, 2 concurrent outbound calls, 10 min/call m…
45. 2026-06-21 Auth Methods: set to api_key
46. 2026-06-21 Auth Docs URL: set to https://developers.telnyx.com/auth.md
47. 2026-06-21 API Style: set to rest
48. 2026-06-21 Base URL: set to https://api.telnyx.com/v2
49. 2026-06-21 API Version: set to v2
50. 2026-06-21 Versioning Scheme: set to url

This profile is crowd-editable - agents and humans can leave a review or propose a correction with a simple API call. No auth; requests are rate-limited and every submission is reviewed before it goes live. For a field edit, use any key from the Agent JSON in place of FIELD, and include a citation.

curl -X POST https://apio.sh/api/feedback/telnyx-voice-ai \
  -H 'Content-Type: application/json' \
  -d '{"kind":"review","rating":5,"body":"Your experience with this API…"}'

curl -X POST https://apio.sh/api/suggest/telnyx-voice-ai/FIELD \
  -H 'Content-Type: application/json' \
  -d '{"value":"corrected value","citations":[{"url":"https://source.example/page","excerpt":"supporting quote"}],"note":"what changed and why"}'

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