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FreeSWITCH vs Twilio Studio

Both stand on interactive voice response software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

FreeSWITCH

Free plan APILinuxMac+2

FreeSWITCH provides a no-cost, self-hostable framework with call-control and integration options. Teams should account for infrastructure upkeep and the separate commercial modules and support options.

Visit FreeSWITCH

Twilio Studio

Free plan APIWeb

Twilio Studio combines a visual workflow builder with triggers, backend connections, and optional code for communication tasks. Check its widget, execution, retention, and HTTP request limits, and account for separate Twilio communications charges.

Visit Twilio Studio

The facts

FreeSWITCHTwilio Studio
Free planYesYes
Open sourceNot publishedNot published
Runs onAPI, Linux, Mac, Self-hosted, WindowsAPI, Web
Lowest paid planFree or on requestFree or on request
Plans published32
MakerNot publishedNot published
Websitesignalwire.comtwilio.com
On interactive voice response software#2 of 20#6 of 20

FreeSWITCH: what it does well

  • Open-source MPL license; production use can be free.
  • Event Socket exposes call and channel control over TCP.
  • Supports multiple scripting and programming integrations.
  • Supports inbound and outbound calling through SignalWire connectivity.

What to know first

  • A free SignalWire account is needed for downloads.
  • Self-hosting requires dedicated infrastructure maintenance resources.
  • Open-source edition support is community-based.

Twilio Studio: what it does well

  • Build flows visually with optional custom code.
  • Supports voice and messaging workflows.
  • Starts flows from calls, messages, webhooks, or other flows.
  • Free tier includes 1,000 executions monthly.
  • Can exchange data with backend systems.

What to know first

  • Flows are limited to 2,000 widgets.
  • Executions end after 1,000 steps or 30 days.
  • Execution and Step data is retained for 30 days.
  • Additional Twilio communications charges are separate.

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