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SignalWire

SignalWire is a programmable communications platform offering voice, messaging, video, MFA, and fax APIs alongside an AI agent runtime.

Freemium · Web, API, Mobile

Pricing Plans

Standard$0.01/minute

Unlimited call recordings · Full API access · AI-powered call routing

Enterprise$0.008/minute

Dedicated support · Custom SLA · Advanced analytics

What is SignalWire?

SignalWire is a programmable communications platform with AI agent capabilities that enables developers and businesses to build voice, messaging, video, MFA, and fax applications. It provides communications APIs, real-time voice and video features, and an AI agent runtime for use cases including voice agents, contact centers, IVR, and call routing. SignalWire comes from the team behind FreeSWITCH and offers an API documented at https://signalwire.com/docs/rest/overview.

Key Features of SignalWire

SignalWire combines communications APIs with an AI agent runtime. Its documented capabilities cover communications channels, API access, multimodal AI input, and call handling.

  • Voice APIs for programmable calling and call routing.
  • Messaging APIs for programmable communications.
  • Video APIs with real-time voice and video capabilities.
  • MFA and fax APIs.
  • AI agent runtime for voice AI agent applications.
  • Multimodal support for text, audio, and vision; listed models include OpenAI GPT-4o-mini and GPT-4o.
  • Proprietary function calling capability.
  • REST API documentation at https://signalwire.com/docs/rest/overview.
  • Default voice throughput of 1 call per second, with 10,000 queued calls.
  • API rate limits of 13,800 POST, PUT, and PATCH requests per 10 seconds across the platform; GET and DELETE are effectively unlimited.

Who Should Use SignalWire?

SignalWire is aimed at developers and businesses building programmable communications applications. The supplied use cases focus on voice automation, call handling, and communications services.

  • Developers building voice AI agents with programmable voice APIs and the AI agent runtime.
  • Contact center teams implementing programmable communications and call handling.
  • Businesses building IVR systems and AI-driven call routing.
  • Developers integrating voice, messaging, video, MFA, or fax into applications.
  • Organizations seeking a programmable communications platform with API access.

How to Use SignalWire

Start with SignalWire's API documentation and select the communications APIs and AI agent capabilities needed for the application. Account setup, credentials, and product-specific implementation details should be confirmed in SignalWire's current documentation.

  1. Review the REST API overview at https://signalwire.com/docs/rest/overview.
  2. Choose the required capabilities, such as voice, messaging, video, MFA, fax, or the AI agent runtime.
  3. Build the application against the relevant SignalWire APIs and configure its user interface as needed.
  4. Test call flows and other communications features against the account's throughput and request limits.
  5. Check current pricing and any applicable account or compliance requirements before deployment.

SignalWire Pricing & Plans

The supplied pricing information lists Standard voice usage at $0.01 per minute and Enterprise at $0.008 per minute. Metadata also identifies the business model as hybrid and the product as freemium, but does not specify what the free tier includes or the subscription component of the hybrid model. At the listed Standard rate, 100 minutes cost approximately $1 and 500 minutes approximately $5, before any other charges or terms.

  • Freemium: listed as a pricing model; free-tier inclusions are not specified.
  • Standard: $0.01 per minute.
  • Enterprise: $0.008 per minute.

Pros

  • One platform provides APIs for voice, messaging, video, MFA, and fax.
  • Includes an AI agent runtime and lists support for text, audio, vision, and proprietary function calling.
  • Published voice rates are $0.01 per minute for Standard and $0.008 per minute for Enterprise.
  • SOC 2 Type II and ISO/IEC 27001:2022 certifications are listed; HIPAA alignment with a BAA is also stated.
  • Published API limits and default call throughput provide concrete capacity figures.

Cons

  • The listed freemium model does not specify free-tier inclusions.
  • The supplied pricing does not explain additional charges, plan terms, or the hybrid model's subscription component.
  • Default voice throughput is 1 call per second unless account-specific limits differ.
  • The listed request limits and 10,000-call queue backlog may require planning for high-volume workloads.
  • Compared with self-hosted options such as FreeSWITCH or Jambonz, a hosted platform offers less direct control over infrastructure.

SignalWire vs Competitors

SignalWire combines hosted communications APIs with an AI agent runtime. The alternatives listed below differ in deployment model, carrier responsibilities, or emphasis; specific pricing comparisons are not available in the supplied facts.

SignalWire

Freemium · Web, API, Mobile

Visit SignalWire

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