The Top Retell Alternative

At a glance

Data sourced from telnyx.com/products/voice-ai-agents and retellai.com/pricing, May 2026. Verify current details on the vendor sites.

Where Retell is genuinely strong

Retell has earned a reputation for shipping a great voice agent quickly, especially for appointment booking, lead qualification, and other repeatable call patterns. We'll name the strengths plainly:

• Voice quality with proprietary turn-taking. Their interrupt-handling and turn-taking model has been benchmarked well in the developer community.
• Drag-and-drop agentic framework. The visual builder lowers the lift to deploy a first agent.
• Verticalized use cases. Healthcare (Pine Park Health), EV support (SWTCH), debt collection (Medical Data Systems) — Retell has put real customers in production in specific verticals.
• Competitive base voice-infrastructure rate at $0.055/min once you've chosen the cheapest model combinations.

If your project is to ship a voice agent for a single use case fast, with a known model stack, and your call volume is moderate, Retell is a legitimate choice.

Where Telnyx is built differently

The architectural difference between Retell and Telnyx is the most direct of any vendor in this space, because Retell's own pricing page lists Telnyx as one of the SIP trunk providers their customers integrate with. The Retell relationship to telecom is explicit: they don't own it. We do.

1. We are the carrier — and Retell tells customers to bring one (often us).

Retell AI uses a BYOC (bring your own carrier) model: "SIP Trunking — Connect to Any Telephony." Their published partners include Twilio, Vonage, and Telnyx. Their published US telephony rate is $0.015/min, which they document as being via "US Twilio." If a Retell customer wants to switch to Telnyx as their underlying carrier, they can — many do. You can use Retell on top of Telnyx, but you don't have to use Retell to use Telnyx Voice AI.

When you use Telnyx Voice AI directly, you remove a layer. The carrier, the agent runtime, the STT, the LLM, and the TTS are one operator on one private network. There is no third-party carrier invoice. There is no third-party LLM invoice unless you choose one.

2. Models live on our GPUs, co-located with telephony.

Telnyx Natural HD TTS, Deepgram Flux STT, and the Telnyx-hosted LLM catalog all run on Telnyx GPUs across 18 Points of Presence. Every layer of the voice chain stays inside our network. Sub-200ms RTT is the consequence of co-location, not a marketing claim measured in isolation.

Retell pieces together third-party STT/TTS/LLM providers over the public internet. Their published per-minute rate ranges from $0.07 to $0.31 depending on which components you select. Their stated latency is ~600ms — three times higher than ours, which is the natural consequence of routing each component call externally.

3. Single, transparent bill — not a stack of component invoices.

Retell's pricing is component-priced and additive:

• Voice infrastructure: $0.055/min
• TTS: $0.015/min (Retell platform, Minimax, Fish, Cartesia, OpenAI Voices) or $0.040/min (ElevenLabs)
• LLM: $0.003/min (GPT 5 nano) to $0.080/min (GPT 5.4)
• Telephony: $0.015/min (US via Twilio)
• Knowledge Base: +$0.005/min
• Advanced denoising: +$0.005/min
• PII removal: +$0.01/min
• Branded calls: +$0.10/outbound call
• Concurrency: 20 free, then $8/month/line
• Phone numbers: $2/month
• Knowledge bases: $8/month each (first 10 free)

This is honest unbundling, but it means a real production deployment quotes against a spreadsheet of line items — and the components route through different providers with different SLAs, different data-handling policies, and different incident playbooks.

Telnyx charges one consumption-based rate, with telephony, in-region compliance processing, and observability included.

4. STIR/SHAKEN attestation, owned end-to-end.

For outbound calling at any meaningful volume, STIR/SHAKEN attestation determines whether your calls show as "Verified" or as "Spam Likely" on the recipient's screen. Telnyx is the carrier — we sign at A-level attestation directly. Retell inherits attestation from whichever carrier the customer brings.

If you're using Retell + Twilio, you have Twilio's attestation. If you're using Retell + Telnyx, you have Telnyx's attestation — but the call now traverses an extra layer.

5. Compliance is the baseline, not a tier.

Telnyx ships HIPAA, PCI DSS, SOC 2 Type II, GDPR, and ISO certifications by default. BAA is standard. EU AI Act-aligned processing is available in-region.

Retell offers Enterprise-tier compliance options with custom pricing. Their dedicated server, 24/7 support, and SSO sit at the Enterprise tier as well. That's an honest commercial structure, but it means the compliance posture you need for a regulated workload isn't part of the rate card you saw.

6. Production muscle.

Telnyx Voice AI runs at Cisco, Weave, Talkdesk, and Iterable, among others. The platform handles 10M+ daily call minutes and 25M+ daily API requests on infrastructure shared with our broader voice business.

Retell's published customer set includes Pine Park Health, SWTCH, and Medical Data Systems. Both vendors have real production customers — the architectural fit for your deployment is the question.

Feature-by-feature comparison

Pricing — modeling a real workload

Take a regulated mid-market workload: 50,000 minutes/month of inbound voice agent traffic, 100 concurrent calls, HIPAA required, ElevenLabs voice quality, GPT-class LLM, English + Spanish.

On Retell, with conservative provider choices:

• Voice infrastructure: $0.055 × 50,000 = $2,750
• TTS (ElevenLabs): $0.040 × 50,000 = $2,000
• LLM (mid-tier GPT): ~$0.040 × 50,000 = $2,000
• Telephony (Twilio US default rate): $0.015 × 50,000 = $750
• Concurrency: 100 lines − 20 free = 80 × $8 = $640/month
• HIPAA Enterprise tier: custom (gated)
• Knowledge bases: depends on architecture
• Estimated component total before HIPAA gating: ~$8,140/month spread across multiple vendor invoices

On Telnyx, that workload runs on a single consumption-based bill with HIPAA, PCI, SOC 2, GDPR, ISO, in-region processing, STIR/SHAKEN attestation, and observability already in the platform. The exact rate depends on your model selection, but the comparison isn't headline per-minute — it's TCO across all the line items, plus the vendors you'd need to manage.

Ask us for a quote against your actual volume and we'll model it transparently against your Retell stack.

Compliance and trust

Voice AI is a trust technology. Telnyx research has consistently found that consumers care about self-disclosure, latency, and consistent accuracy. 80%+ will abandon a call that feels slow. For the regulated buyer specifically:

• HIPAA: Telnyx HIPAA-compliant with BAA in the baseline. Retell gates compliance posture at the Enterprise tier with custom pricing.
• PCI DSS: Both can support PCI workloads; Telnyx ships PCI controls in the baseline.
• SOC 2 Type II: Telnyx — certified, default. Retell — Enterprise tier.
• GDPR / ISO: Telnyx certified to both as defaults.
• STIR/SHAKEN: Telnyx signs at A-level as the carrier. Retell inherits whatever the bring-your-own-carrier provider attests.
• Data residency: Telnyx processes in-region across US, EU, APAC on its own infrastructure. Retell's residency depends on the third-party providers it routes to.

When to choose Retell

We'd tell you to consider Retell honestly if you're:

• Building a single-use-case voice agent for a known vertical with moderate volume
• Comfortable bringing your own carrier and managing multiple component contracts
• Optimizing for time-to-deployment on a specific call type
• Not yet operating under HIPAA, PCI, or strict EU residency requirements
• Working with a known model stack and don't expect to swap models often

When to choose Telnyx

Choose Telnyx if you're:

• Shipping voice agents into production at scale (50K+ minutes/month is a typical threshold)
• Operating in healthcare, FinServ, insurance, telecom, or any regulated vertical
• Doing meaningful outbound calling and need A-level STIR/SHAKEN attestation natively
• Tired of managing the carrier separately from the platform
• Required to demonstrate data residency in EU/APAC
• Defending a sub-second latency budget
• Looking for one operator and one bill across the voice chain

Migrating from Retell to Telnyx

If you've already shipped on Retell — many teams have, and many of them are using Telnyx as their carrier underneath — the migration path is often shorter than the original build. The carrier is already wired up. The model layer moves onto our network. The agent logic ports over. Talk to us about a migration plan that preserves your existing agent design while consolidating onto one operator.

FAQ

Retell explicitly partners with Telnyx as a SIP provider — why move? Because that's one layer. When you use Retell + Telnyx, you have two vendors. When you use Telnyx directly, you have one. The economics, the latency budget, and the incident response all simplify.

Can I keep using ElevenLabs voices on Telnyx? Yes — ElevenLabs voices are available on Telnyx without the $0.040/min component routing premium. We also offer Telnyx Natural HD, which is the #1 TTS model in production on our platform.

Is Telnyx more expensive than Retell? On a single line item, sometimes. On TCO across voice infrastructure + TTS + LLM + telephony + concurrency + HIPAA gating + multi-vendor management, generally not. We'll model your specific workload openly.

What about Retell's drag-and-drop builder? Telnyx Voice AI ships with 175+ pre-built skills and 30+ pre-built integrations across 13 categories. Different design philosophy — both yield a working agent fast.

Will my CCaaS still work? Yes. Telnyx Voice AI is designed to sit in front of Genesys, NICE, Five9, Twilio Flex, and others as a deflection layer — not to force a forklift replacement.

Try it

• Start free on Telnyx Voice AI Agents
• Talk to a solutions engineer about a side-by-side proof of concept on your workload
• Read the State of Voice AI 2026

Telnyx is the agent platform that runs the full voice chain — network, models, runtime — on one infrastructure. One API, one bill, one operator.