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Pricing is quote-based.
SignalWire has no published flat subscription price or annual plan price. Its listed charges are usage-based: SIP/WebRTC voice starts at $0.003 per minute, while the AI Agent Runtime is $0.16 per minute before separately billed voice transport. Local SMS is $0.00415 per segment, inbound and outbound. Numbers, add-ons and carrier fees can raise the bill. The pricing page lists no free plan; trial availability is not published, so budget from expected volume and channels.
01Every plan, line by line
| Plan | Billed annually | Billed monthly | Built for |
|---|---|---|---|
| SignalWire AI Agent Runtime | — | Quote | AI voice agent developers |
| Voice API | — | Quote | Businesses adding voice to apps |
| Messaging API | — | Quote | Businesses sending customer messages |
Add-ons and overages
- Voice high-throughput calling: 1 call/sec $0/month each; 2–20 $15/month each; 21–50 $20; 51–100 $25; 101–200 $30; 201–250 $40; three-month commitment.
- Voice features: call recording $0.002/min; transcription $0.02/15 seconds; conferencing $0.0018/min/participant; E911 $0.75/month.
- TTS: $0.000008–$0.0002 per character, depending on tier.
- SMS short codes: $1,500 or $3,000/quarter, plus $750 setup; vanity codes require $500 minimum monthly spend.
- Subscriber: $3/month. Port-out: $5 per number.
- Number pooling: $100 processing and $2,000 configuration, one time; requires pre-approval.
- Campaign fees include $4.50 one-time brand registration and campaign fees from $0 to $30/month, depending on use case.
- Carrier fees may apply to messages; Meta messaging fees are billed separately. The page also lists a $250 T-Mobile inactivity passthrough fee after 60 consecutive inactive days.
02What the plan grid doesn't tell you
AI voice transport
The $0.16/min runtime excludes voice transport. The listed typical standard SIP/PSTN total is about $0.163–$0.168/min.
Number rental
Local numbers cost $0.50/month each; toll-free numbers cost $0.80/month. These are separate from usage charges.
Voice features
Recording is $0.002/min, transcription $0.02 per 15 seconds, conferencing $0.0018/min/participant, and E911 $0.75/month.
Messaging and carrier fees
Campaign fees range from $0–$30/month, plus $4.50 brand registration. Carrier fees may apply; the page lists a $250 T-Mobile inactivity fee after 60 days.
03Which plan should you buy?
| If you are… | Get | Why |
|---|---|---|
| AI voice agent developers | SignalWire AI Agent Runtime | $0.16/min with standard TTS included; voice transport is separate. Typical standard SIP/PSTN total is about $0.163–$0.168/min. |
| Apps that need voice | Voice API | SIP/WebRTC costs $0.003/min. Local PSTN costs $0.0066 inbound and $0.008 outbound, before number rental and other features. |
| Businesses sending messages | Messaging API | Local SMS is $0.00415 per segment in either direction. MMS, WhatsApp, number rental and possible carrier or Meta fees are separate. |
04Is SignalWire worth the money?
SignalWire is worth considering when you need programmable voice, messaging, video or AI flows under one control plane. The trade-off is a bill built from usage rates and separate charges, not a published flat subscription. That makes costs less predictable than a flat plan, especially when you add voice transport, number rental, features or messaging fees. Before switching, model expected minutes, message segments and add-ons against the specific rates for each channel.
SignalWire pricing FAQ
What does SignalWire do?
SignalWire is a programmable communications platform for calls, messaging, video and AI. Developers can define call flows and AI agents in code. Its listed tools include SWML flows, REST APIs and realtime SDKs for controlling calls and responding to call events.
What is SignalWire FreeSWITCH?
The pricing information for this page does not define a product called SignalWire FreeSWITCH or explain how it relates to SignalWire. It describes SignalWire as a programmable communications platform and lists usage-based rates for its AI Agent Runtime, Voice API and Messaging API.
What is the SignalWire app?
The pricing information does not describe a standalone SignalWire app or its features. It describes a programmable platform with APIs, SWML flows and realtime SDKs for calls, messaging, video and AI. Check the product documentation for details about any specific app or client.
How much does SignalWire cost?
There is no published flat subscription price or annual price. Listed rates include $0.003/min for SIP/WebRTC voice, $0.16/min for AI Agent Runtime, and $0.00415 per local SMS segment. Number rental, voice features and other fees can add to usage costs.