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The Best Telnyx Alternative for AI Agents

Add voice to your AI proposition without moving deeper into the communications stack

Seamly and Telnyx can both connect AI agents to the phone channel, but they approach that job differently. This page explores the difference between Seamly and Telnyx, so you can make an informed decision.

The core difference

Telnyx offers an increasingly integrated environment for building Voice AI, combining communications infrastructure with AI services.

Seamly takes a more focused role. Your existing AI platform remains responsible for the agent, while Seamly provides and operates the infrastructure required to make that agent available over the phone.

Integrated communications and AI stack

Telnyx combines telephony infrastructure with Voice AI capabilities such as orchestration, speech-to-text, text-to-speech and access to AI models. Teams can use these services together through the Telnyx platform, either through APIs or its Assistant Builder.

This creates an integrated environment for building and operating voice agents. It also means that more parts of the Voice AI architecture move into the Telnyx ecosystem, including components that may already exist within your conversational AI platform.

Voice infrastructure around your existing AI platform

Seamly is designed to connect an existing AI agent to the phone channel without replacing the platform behind it. Your own platform remains responsible for agent logic, orchestration, integrations and customer workflows.

Seamly adds the voice-specific layer around that setup, including telephony, routing, speech technology, number management, monitoring and operational support.

Bring more of the stack together

Telnyx follows a platform approach in which communications infrastructure and AI services can be sourced and configured within one environment. This can suit teams that want to consolidate telephony and Voice AI components with a single provider.

The result is an architecture that becomes more closely connected to the services, models and configuration choices available within the Telnyx platform.

Keep the AI proposition where it is

Seamly starts from the assumption that your AI proposition already exists. Seamly operates as the managed voice layer underneath that platform, rather than introducing another environment for building the agent.

Your team retains control over the intelligence and customer proposition, while Seamly takes responsibility for the phone channel.

European hosting by default

Telnyx has European infrastructure and offers European data locality options.

However, European infrastructure does not automatically mean that every configuration is processed exclusively in the EU. Telnyx states that processing location can depend on configuration and the third-party STT, TTS or AI services selected.

Seamly is fully built and hosted in Europe by default.

For European platforms, system integrators and enterprise customers, EU hosting is therefore part of the standard Seamly architecture instead of a deployment choice that needs to be configured and validated.

Comparison overview

	Seamly	Telnyx
Starting point	Existing AI agent or conversational AI platform	Integrated communications and AI stack
Product model	Managed voice infrastructure layer	Communications and AI infrastructure platform
Telephony	Fully managed by Seamly	Telnyx infrastructure and APIs
Operational model	Managed voice service	Platform services configured by customer
Partner model	Purpose-built for platforms and system integrators	General communications infrastructure platform
Pricing unit	Fixed price per voicebot call	Primarily usage-based per minute
Hosting	Fully EU built and hosted by default	Global infrastructure with European locality options
From text to voice AI transition support	Included	Self-managed
Support model	Dedicated partner support	Documentation & support tickets
Best fit	Adding managed voice to an existing AI proposition	Consolidating telephony and AI services within one provider

Per-minute pricing or fixed pricing per call?

Telnyx prices its Voice AI engine primarily on usage.

At the time of writing, Telnyx lists Voice AI orchestration, STT and TTS at $0.05 per minute. LLM usage and telephony are charged separately. Additional telephony functionality can also carry separate usage charges.

This structure gives teams detailed visibility into the services they consume, while total costs depend on call duration and the components selected.

Seamly uses a fixed price per voicebot call.
Speech recognition, voice synthesis, recordings, transcripts, insights, voice infrastructure operations, support and EU hosting are all included. This gives partners a call-based unit that can be incorporated directly into their own commercial model. And it’s predictable. For partners and their clients.

	Seamly	Telnyx
Pricing model	Fixed price per voicebot call	Usage per minute
Voice orchestration	Included	Included in Voice AI engine
STT and TTS	Included	Included in Voice AI engine
LLM	Existing AI layer remains in place	Billed separately based on model
Telephony infrastructure	Included	Charged separately
Recordings and insights	Included	Depends on selected services
EU hosting	Included	European options available
Primary cost driver	Number of voicebot calls	Call duration and selected components

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When to choose which?

Choose Seamly when

You already have or build an AI agent or conversational AI platform
You want to add telephony while keeping your existing AI layer
Voice needs to become part of the solution you sell to customers
You prefer a managed voice service
Fixed pricing per voicebot call fits your commercial model
Fully European hosting by default matters

Choose Telnyx when

You want communications and AI infrastructure from the same provider
You want to use Telnyx's own Voice AI tooling
Usage-based pricing fits your economics
You need global communications infrastructure

Keep your AI proposition. Add the phone channel.

Telnyx brings telephony and AI services together in one integrated environment.

Seamly keeps the AI layer where it already lives and adds a managed voice channel around it.

For conversational AI platforms and system integrators that want to expand into voice without shifting more of their product into a communications stack, we can only tell you which is the better option!

Talk to our partner manager Albert