Telnyx Voice AI Integration: A Developer's Guide to the Twilio Alternative

Twilio Is Not Your Only Option

If you have been building voice AI applications, chances are you defaulted to Twilio. It is the name everyone knows, the documentation everyone references, and the API everyone benchmarks against. But familiarity comes at a cost, literally.

I recently ran the numbers on a client project handling 50,000 minutes of voice traffic per month. The Twilio bill was substantial. Then I ran the same projections through Telnyx. The difference was not marginal. It was the kind of difference that changes your unit economics entirely.

This guide covers everything you need to know about integrating Telnyx Voice AI with Burki: verified pricing, head-to-head comparisons with Twilio, and a complete setup walkthrough. By the end, you will have the information needed to make an informed decision about your telephony stack.

What Is Telnyx? A Technical Overview

Telnyx is a full-stack communications platform that has been gaining serious traction among developers who prioritize cost efficiency and infrastructure control. Unlike Twilio, which operates as a CPaaS built on third-party networks and carrier relationships, Telnyx owns and operates its own private global IP backbone.

Key Technical Differentiators

Network Ownership: Telnyx holds telecom licenses in over 30 countries and operates its own infrastructure. This means direct control over routing, media quality, and security. Twilio, by contrast, relies on external partners and the public internet to deliver voice services.

Full-Stack Voice AI: Telnyx positions itself as more than just a telephony provider. Their platform includes everything needed to build intelligent AI agents: telephony, LLMs, and what they call "NaturalHD voices" for text-to-speech.

G2 Rating: According to G2's comparison report, Telnyx scores 8.9 out of 10 as a CPaaS, compared to Twilio's 8.0.

Telnyx Voice API Capabilities

• Programmable Voice API with SIP trunking
• Elastic SIP Trunks with local rate pricing globally
• Call Control for building custom logic using modular primitives
• TeXML: A TwiML-compatible markup language for easier migrations
• AMD (Answering Machine Detection) for campaign automation
• WebRTC support for browser-based calling

Telnyx Pricing: Verified 2026 Rates

Let me break down the current pricing structure. These numbers matter because they directly impact your voice AI operating costs.

Voice API Pricing

Voice AI Pricing

Telnyx offers Voice AI at $0.08 per minute, which bundles:

• Speech-to-Text (STT)
• Text-to-Speech (TTS)
• Open-source AI processing

For high-volume applications, rates can drop to $0.06 per minute (approximately $3.60 per hour), making advanced Voice AI accessible for scale.

Volume Discounts

Telnyx offers tiered pricing based on usage:

• Pay-as-you-go rates for low volume
• Contract pricing with predictable monthly payments for high volume
• Dedicated customer success manager included with contracts
• Free 24/7 support from in-house engineers at all tiers

Typical Savings: Customers who switch from Twilio to Telnyx report saving between 30% and 70% on their communication services. Telnyx specifically advertises 45% average savings when customers migrate to their full stack platform for Voice AI.

Telnyx vs Twilio: A Developer's Comparison

Let me walk through the practical differences that matter when building voice AI applications.

Infrastructure Architecture

API Compatibility

Good news for Twilio developers: Telnyx designed TeXML as a drop-in replacement for TwiML. The migration path is intentionally smooth, with minimal code changes required.

<!-- TeXML example (same structure as TwiML) -->
<Response>
  <Say voice="female">Welcome to our voice AI service.</Say>
  <Gather input="speech" timeout="3">
    <Say>How can I help you today?</Say>
  </Gather>
</Response>

Customer Support Comparison

This is where Telnyx makes a strong case:

Telnyx Support:

• Free 24/7 support from expert in-house engineers
• Ranks highest in support among cloud communication platforms
• No support tiers or guaranteed response times (they just respond quickly)

Twilio Support:

• Developer plan: Basic support, no guaranteed response times
• Production plan: 3-hour response for P1 issues, 6-hour for P2, 9-hour for P3
• Premium support requires additional payment

Unique Platform Features

Twilio Exclusive:

• Twilio Flex: Digital engagement center for customer service
• Twilio Engage: Marketing and customer engagement platform
• Extensive third-party integration marketplace

Telnyx Exclusive:

• Full-stack conversational AI (telephony + LLMs + TTS in one platform)
• Call Control: Modular primitives for custom voice logic
• Private network infrastructure with direct routing control

Burki + Telnyx Integration: Full Feature Support

Burki provides first-class support for Telnyx as a telephony provider. Here is what the integration enables:

Supported Capabilities

Why This Integration Matters

Burki's architecture is provider-agnostic. You can:

1. Start with Telnyx for cost-effective deployments
2. Mix providers based on geographic coverage or specific features
3. Migrate from Twilio without rebuilding your assistant logic
4. Bring your own SIP trunk if you have existing carrier relationships

The assistant configuration, system prompts, tools, and conversation logic remain unchanged regardless of which telephony provider you choose. This decoupling means your voice AI investment is portable.

Setup Guide: Connecting Telnyx to Burki

Prerequisites

• Active Telnyx account with API credentials
• Burki account with organization admin access
• At least one phone number provisioned in Telnyx

Step 1: Obtain Telnyx Credentials

1. Log into your Telnyx Mission Control Portal
2. Navigate to Auth > V2 API Keys
3. Create a new API key or copy an existing one
4. Note your API key (starts with KEY...)

Step 2: Configure Telnyx in Burki

1. Navigate to Settings > Provider Settings in your Burki dashboard
2. Select Telnyx from the provider list
3. Enter your Telnyx API key
4. Configure your preferred webhook URL format
5. Save the configuration

Step 3: Purchase or Import Phone Numbers

Option A: Purchase through Burki

1. Go to Phone Numbers > Search
2. Select Telnyx as the provider
3. Search by area code or locality
4. Complete the purchase (pricing comparison shown)

Option B: Use Existing Telnyx Numbers

1. In Telnyx Mission Control, configure your number's voice settings
2. Set the webhook URL to your Burki endpoint: https://your-burki-instance.com/api/v1/webhooks/telnyx/voice
3. Import the number in Burki's phone number management

Step 4: Assign to Assistant

1. Navigate to your assistant's configuration
2. Under Phone Number Assignment, select your Telnyx number
3. The webhook configuration is handled automatically
4. Test with an inbound call

Step 5: Verify Webhook Configuration

Telnyx webhooks should be configured to send:

• Call initiated events
• Call answered events
• Call hangup events
• DTMF events (if using IVR navigation)

Burki generates the appropriate TwiML/TeXML responses automatically based on your assistant configuration.

Cost Savings Analysis: Real Numbers

Let me quantify what switching to Telnyx could mean for different usage levels.

Scenario 1: Small Deployment (5,000 minutes/month)

Scenario 2: Medium Deployment (50,000 minutes/month)

Scenario 3: Enterprise Deployment (500,000 minutes/month)

At this volume, Telnyx contract pricing kicks in. Typical savings range from 50-70%, and you receive a dedicated customer success manager.

These savings compound with Burki's platform efficiency. Because Burki charges platform fees separately from pass-through telephony costs, every dollar saved on carrier costs goes directly to your bottom line.

When to Choose Telnyx Over Twilio

Choose Telnyx when:

• Cost efficiency is a priority
• You want infrastructure-level control over routing and quality
• You need responsive support without premium tier pricing
• You are building voice AI at scale (the savings multiply)
• You want a single vendor for telephony + AI capabilities

Stick with Twilio when:

• You need Twilio-specific products (Flex, Engage)
• Your team has deep Twilio expertise and migration cost is high
• You rely heavily on Twilio's third-party integration marketplace
• You have existing Twilio contracts with favorable terms

Use Both (Burki supports this):

• Route by geography (Telnyx for US, Twilio for international)
• A/B test call quality with real traffic
• Gradual migration while maintaining stability

Frequently Asked Questions

Is Telnyx as reliable as Twilio?

Telnyx operates its own private global IP backbone, which gives them more direct control over reliability than Twilio's third-party network approach. Their G2 rating of 8.9 vs Twilio's 8.0 reflects this, though both are production-ready platforms.

How hard is migration from Twilio to Telnyx?

Telnyx designed TeXML as a TwiML-compatible format specifically to ease migrations. Most applications require minimal code changes. With Burki, the migration is even simpler since the assistant logic is provider-agnostic.

Does Telnyx support international calling?

Yes. Telnyx holds telecom licenses in 30+ countries and their SIP trunking architecture means all calls are charged at local rates, regardless of where your users are.

What about voice AI capabilities?

Telnyx offers a full Voice AI stack at $0.06-0.08/minute that includes STT, TTS, and AI processing. However, Burki's multi-provider architecture lets you mix telephony (Telnyx) with your preferred STT/TTS providers (Deepgram, ElevenLabs, etc.) for maximum flexibility.

Is Telnyx SOC 2 compliant?

Yes. Telnyx maintains SOC 2 Type II compliance and offers enterprise security features. For healthcare applications requiring HIPAA compliance, Burki's platform layer adds additional security controls.

Can I use my existing phone numbers?

Yes. You can port numbers to Telnyx or configure your existing Telnyx numbers to work with Burki's webhook system.

Start Building with Telnyx and Burki

The voice AI landscape has evolved. You no longer need to default to the most expensive option because it is the most familiar. Telnyx offers genuine cost savings, comparable (often superior) infrastructure, and excellent support, all while maintaining API compatibility with Twilio patterns.

Burki makes this choice low-risk. Our provider-agnostic architecture means you can:

1. Test Telnyx on a subset of traffic
2. Compare costs with real usage data
3. Scale confidently knowing your assistant logic is portable

Ready to see the difference? Sign up for Burki and connect your Telnyx account in minutes. Your voice AI deserves infrastructure that scales with you, not against your budget.

Get Started with Burki | View Telnyx Integration Docs

Sources:

• Telnyx Voice API Pricing
• Telnyx Conversational AI Pricing
• Telnyx vs Twilio Comparison
• Telnyx: The Better Twilio Alternative
• Plivo: Telnyx vs Twilio Comparison
• Capterra: Telnyx vs Twilio 2026