Comparing SignalWire vs

LiveKit

Plivo

Telnyx

Twilio

—— Platform comparison

SignalWire vs.

Telnyx

Telnyx gives you the pieces: SIP here, TTS/STT there, AI somewhere else. SignalWire gives you one programmable runtime where media, routing, and the AI kernel share the same environment.

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SignalWire positioning

A different philosophy: own the interaction, don't just transport it.

Communications has never had a control plane, a layer that owns interaction state, lifecycle, routing, and outcomes. CPaaS gave developers APIs but pushed state management, transfer logic, and compliance logging back onto every customer. SignalWire is defining Programmable Unified Communications: the missing layer. One carrier-grade orchestrator holds call state and AI-engine state in sync, with the AI kernel running inside the media engine, not haphazardly connected through webhooks and WebSocket bridges. Built by the FreeSWITCH team, the same technology powering major UCaaS and CCaaS platforms for two decades. Most voice AI is "prompt and pray," behavior governed by prompts alone. SignalWire's System-Directed AI constrains the model with code: scoped tools, step machines, and validation before execution. The AI can't leak what it doesn't know or break rules it doesn't enforce. Trusted across 2,700+ companies and 2.7 billion minutes and messages annually.

Where the architecture differs

What Telnyx does well and where the architecture differs.

WHAT TELNYX DOES WELL

Telnyx owns network infrastructure and gives developers low-level telecom control: carrier selection, routing, number provisioning, and private connectivity. For carrier-grade voice and SIP trunking at competitive rates, it is a capable platform.

THE STRUCTURAL DIFFERENCE

Telnyx is a CPaaS that treats AI as an architectural afterthought. Media streams, external logic layers, and orchestration tools are separate services you stitch together, an integration tax paid in latency, cost, and engineering time. Even the basics, like transfers and state management, turn into an engineering burden. SignalWire runs the AI kernel inside the media layer, so responses are real-time with no extra network hops.

Side by side

SignalWire vs. Telnyx, category by category.

The scannable verdict with the receipts. Every claim traces to a source.

Category

Telynx

Infrastructure ownership

Owns network and telephony, but AI and media orchestration are assembled from separate services.

Owns the full stack: carrier-grade telephony, media engine, and AI kernel, built by the FreeSWITCH team.

AI architecture

AI is layered on top of the CPaaS; media streams, logic, and orchestration are wired together by the customer.

AI kernel runs inside the media engine. No extra network hops, no added latency.

Latency (measured)

Extra hops between media, STT/TTS, and external AI orchestration add latency beyond the media path.

~1200ms typical round-trip, 800ms optimized, 600ms speech-to-speech. Measured by the open-source latency_checker.

Multi-agent handoffs

No native context-preserving handoff. State is yours to carry between agents.

Escalate, transfer, and summarize across agents with state preserved in one runtime.

PSTN deliverability

User-reported dropped calls and local numbers not receiving calls.

Distributed PoPs and owned routing reach PSTN endpoints directly, including rural.

Messaging campaign approval

Users report multi-day delays and week-long waits on brand and campaign registration

Same-day brand approval, real-time status tracking, and 48-hour campaign turnaround with concierge TCR review.

Observability

Segment-level visibility is limited, which slows failure diagnosis.

Consolidated logs across voice, messaging, video, and fax, down to the message and segment

Support responsiveness

User-reported response times in hours to days.

Actual engineers in your corner, responding right away, 24/7.

Telynx

Infrastructure ownership

Owns network and telephony, but AI and media orchestration are assembled from separate services.

AI architecture

AI is layered on top of the CPaaS; media streams, logic, and orchestration are wired together by the customer.

Latency (measured)

Extra hops between media, STT/TTS, and external AI orchestration add latency beyond the media path.

Multi-agent handoffs

No native context-preserving handoff. State is yours to carry between agents.

PSTN deliverability

User-reported dropped calls and local numbers not receiving calls.

Messaging campaign approval

Users report multi-day delays and week-long waits on brand and campaign registration

Observability

Segment-level visibility is limited, which slows failure diagnosis.

Support responsiveness

User-reported response times in hours to days.

Infrastructure ownership

Owns the full stack: carrier-grade telephony, media engine, and AI kernel, built by the FreeSWITCH team.

AI architecture

AI kernel runs inside the media engine. No extra network hops, no added latency.

Latency (measured)

~1200ms typical round-trip, 800ms optimized, 600ms speech-to-speech. Measured by the open-source latency_checker.

Multi-agent handoffs

Escalate, transfer, and summarize across agents with state preserved in one runtime.

PSTN deliverability

Distributed PoPs and owned routing reach PSTN endpoints directly, including rural.

Messaging campaign approval

Same-day brand approval, real-time status tracking, and 48-hour campaign turnaround with concierge TCR review.

Observability

Consolidated logs across voice, messaging, video, and fax, down to the message and segment

Support responsiveness

Actual engineers in your corner, responding right away, 24/7.

Disclosure Statement: Latency numbers come from the open-source latency_checker benchmark, measured as a full round-trip on stereo recordings. Deliverability, campaign approval, and support response comparisons are based on publicly reported user experiences.

Migration

Migrating from Telnyx

Whether the switch is a weekend or a quarter comes down to how much orchestration you carry today.

Port or parallel-run your numbers

Number porting is supported, and you can run both platforms in parallel during cutover; no flag-day risk.

Swap your endpoint, not your app

Telnyx's TeXML follows Twilio-style XML conventions, and SignalWire's Compatibility API accepts the same request shapes so most migrations start by changing the API endpoint and credentials, not rewriting the application.

Move your AI workloads

Replace separate STT/LLM/TTS orchestration with governed SWML agents. State management, turn detection, and transfers are platform-native, so this is typically less code than what you are replacing.

Re-register your messaging campaigns

Concierge TCR review, same-day brand approval, and campaign turnaround in as little as 48 hours. Register before cutover so messaging goes live the moment you switch.

Talk to a migration specialist

Not sure what your migration looks like? Get a validated estimate for your exact setup and architecture reviewed by an engineer.

Talk to an expert

Port or parallel-run your numbers

Number porting is supported, and you can run both platforms in parallel during cutover; no flag-day risk.

Swap your endpoint, not your app

Move your AI workloads

Replace separate STT/LLM/TTS orchestration with governed SWML agents. State management, turn detection, and transfers are platform-native, so this is typically less code than what you are replacing.

Re-register your messaging campaigns

Concierge TCR review, same-day brand approval, and campaign turnaround in as little as 48 hours. Register before cutover so messaging goes live the moment you switch.

Talk to a migration specialist

Not sure what your migration looks like? Get a validated estimate for your exact setup and architecture reviewed by an engineer.

Talk to an expert

Port or parallel-run your numbers

Number porting is supported, and you can run both platforms in parallel during cutover; no flag-day risk.

Swap your endpoint, not your app

Move your AI workloads

Replace separate STT/LLM/TTS orchestration with governed SWML agents. State management, turn detection, and transfers are platform-native, so this is typically less code than what you are replacing.

Re-register your messaging campaigns

Concierge TCR review, same-day brand approval, and campaign turnaround in as little as 48 hours. Register before cutover so messaging goes live the moment you switch.

Talk to a migration specialist

Not sure what your migration looks like? Get a validated estimate for your exact setup and architecture reviewed by an engineer.

Talk to an expert

Migration from Telnyx

copy

# Point your SDK at SignalWire. Same request shape
export ACCOUNT_SID="your-project-id"
export AUTH_TOKEN="your-api-token"
 
curl -X POST \
  https://your-space.signalwire.com/api/laml/2010-04-01/Accounts/$ACCOUNT_SID/Calls.json \
  -u "$ACCOUNT_SID:$AUTH_TOKEN" \
  --data-urlencode "From=+15551112222" \
  --data-urlencode "To=+15553334444" \
  --data-urlencode "Url=https://your-app.com/handler.xml"
 
# The LaML your app returns keeps working

Migration from Telnyx

copy

# Point your SDK at SignalWire. Same request shape
export ACCOUNT_SID="your-project-id"
export AUTH_TOKEN="your-api-token"
 
curl -X POST \
  https://your-space.signalwire.com/api/laml/2010-04-01/Accounts/$ACCOUNT_SID/Calls.json \
  -u "$ACCOUNT_SID:$AUTH_TOKEN" \
  --data-urlencode "From=+15551112222" \
  --data-urlencode "To=+15553334444" \
  --data-urlencode "Url=https://your-app.com/handler.xml"
 
# The LaML your app returns keeps working

Migration from Telnyx

copy

# Point your SDK at SignalWire. Same request shape
export ACCOUNT_SID="your-project-id"
export AUTH_TOKEN="your-api-token"
 
curl -X POST \
  https://your-space.signalwire.com/api/laml/2010-04-01/Accounts/$ACCOUNT_SID/Calls.json \
  -u "$ACCOUNT_SID:$AUTH_TOKEN" \
  --data-urlencode "From=+15551112222" \
  --data-urlencode "To=+15553334444" \
  --data-urlencode "Url=https://your-app.com/handler.xml"
 
# The LaML your app returns keeps working

Migration from Telnyx

copy

# Point your SDK at SignalWire. Same request shape
export ACCOUNT_SID="your-project-id"
export AUTH_TOKEN="your-api-token"
 
curl -X POST \
  https://your-space.signalwire.com/api/laml/2010-04-01/Accounts/$ACCOUNT_SID/Calls.json \
  -u "$ACCOUNT_SID:$AUTH_TOKEN" \
  --data-urlencode "From=+15551112222" \
  --data-urlencode "To=+15553334444" \
  --data-urlencode "Url=https://your-app.com/handler.xml"
 
# The LaML your app returns keeps working

Customer proof

2,000+ companies build on SignalWire

“We're able to meet our customers' requests in hours. Not even days. Our development time is so short because SignalWire has so many of the capabilities built in.”

Justin Massey

Founder and CEO at RelayHawk

“We're able to meet our customers' requests in hours. Not even days. Our development time is so short because SignalWire has so many of the capabilities built in.”

Justin Massey

Founder and CEO at RelayHawk

Frequently asked questions

Common questions about migrating from Telnyx to SignalWire.

What is the difference between PUC and a CPaaS like Telnyx?

A CPaaS gives you APIs to move calls and messages; you assemble AI, state, and orchestration on top of them. Programmable Unified Communications puts voice, messaging, video, and the AI kernel in one runtime, so multi-agent handoffs preserve context by default with no separate services to connect.

How fast can I get an A2P 10DLC campaign approved?

Same-day brand approval and a 48-hour campaign turnaround, with concierge review to get the submission right the first time and real-time status tracking so you are never guessing.

Does SignalWire own its telephony infrastructure?

Yes. It is built by the FreeSWITCH team with no third-party CPaaS underneath. The same technology powering major UCaaS and CCaaS platforms for two decades, with native SIP connectivity and distributed PoPs.

Can I keep my phone numbers if I switch?

Yes. Number porting is supported, and you can run both platforms in parallel during cutover, so there is no flag-day risk.

How does SignalWire's pricing compare to Telnyx?

SignalWire bills one transparent rate, about $0.16/min runtime for STT, LLM, TTS, and orchestration. A Telnyx-based AI stack adds separately billed STT/TTS and orchestration vendors on top of telephony, so the all-in number is usually higher than the headline rate.

How does SignalWire measure its latency claims?

With the open-source latency_checker, which measures the full conversational round-trip on stereo recordings, not a single model hop. Typical turns land around 1200ms, 800ms on an optimized stack, and 600ms with speech-to-speech models. Be skeptical of sub-500ms claims that measure only part of the path.

Moving off Telnyx? See the difference on your own stack.

Spin up test credentials in minutes, or walk your migration through with an engineer for no flag-day risk.

Start building

Talk through your migration

Moving off Telnyx? See the difference on your own stack.

Spin up test credentials in minutes, or walk your migration through with an engineer for no flag-day risk.

Start building

Talk through your migration

Moving off Telnyx? See the difference on your own stack.

Spin up test credentials in minutes, or walk your migration through with an engineer for no flag-day risk.

Start building

Talk through your migration

Moving off Telnyx? See the difference on your own stack.

Spin up test credentials in minutes, or walk your migration through with an engineer for no flag-day risk.

Start building

Talk through your migration