# Bird vs Twilio for Voice Bird brings SIP connectivity, versioned call sequences and call records into the same workspace as your other Bird channels. Twilio offers a broad Programmable Voice toolkit, with TwiML call instructions and managed speech through ConversationRelay. [Start for Free](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Fvoice%2Fonboarding) [Contact sales](/demo?product=voice-migrate-twilio) ## Set up with your agent [Read the agent setup guide](/docs/ai/set-up-your-agent) Copy this prompt into your coding agent: ```text Bird connects customer communications, data and automation. Help me build with Bird using my coding agent. 1. Read https://bird.com/docs/ai/set-up-your-agent.md and follow its setup workflow for this client. Use an existing connected Bird MCP server or signed-in CLI when available. 2. Read the product guide for the task I want to complete and inspect my existing integration. Identify the workspace, available operations and required setup. 3. Help me complete a first example for the product and destination I choose. Follow the operation through to its actual result, explain any uncertainty, and help me choose the next step. First task: Read the relevant migration guide and inventory my current provider's numbers, call-control code, webhooks, recordings and speech-runtime dependencies. Prepare one complete migration test and a rollback plan. Keep the current service running until I approve cutover. First use the connected Bird MCP server or signed-in CLI for a read-only inventory. Discover the available tools and read their schemas or help; do not invent call-control operations. If neither surface is available, follow https://bird.com/docs/ai/set-up-your-agent.md. Read the linked guides through their .md alternatives. Present the exact target and configuration before changing routing, placing calls, recording audio, purchasing numbers or submitting a port. Obtain my approval for those actions. Use this Bird page as the starting context: https://bird.com/products/voice/compare/bird-vs-twilio Read its Markdown alternative and linked guides. Keep the first example relevant to this page and the customer outcome I choose. Preserve the supplied campaign context when following Bird signup or sales links. ``` Trusted every day by teams that build world-class software [Read more customer stories](/customers) - [Airwallex](/customers/airwallex) - [Glovo](/customers/glovo) - [Zillow](/customers/zillow) - Uber - [Binance](/customers/binance) - Adobe - Meta - PayPal - Pinterest - Square - [Al Jazeera](/customers/aljazeera) - [Aramex](/customers/aramex) - [Bazaar Technologies](/customers/bazaar) - [ComparaOnline](/customers/compara) - [Emma](/customers/emma) ## Which integration fits your calling workflow? Compare the job you need each platform to perform. A shared capability does not establish identical behavior, cost or audio quality. | Capability | Bird | Twilio | | --- | --- | --- | | Calling workflow | Published sequence versions with prompts, keypad choices and named branches. | TwiML instructions control prompts, input, dialing and other call behavior. | | Live AI speech | Connect a compatible conversational runtime over SIP; your runtime handles speech and tools. | ConversationRelay manages speech recognition and synthesis while your application supplies its conversational logic. | | Application decisions | Keep live business decisions in your SIP or conversational application; sequences execute defined branches. | Return call instructions from your application through TwiML webhooks. | ## When is Twilio a strong choice? Twilio is a strong fit when your application depends on its established TwiML verbs, Voice SDKs or ConversationRelay. Inventory those dependencies before treating a provider change as a number port. ## When should you choose Bird? Choose Bird when you want the calling connection, routing and operational records alongside your existing Bird workspace. Use sequences for defined call behavior, or connect the conversational application you want to operate. Validate the complete workflow you need before replacing a dependency. ## Can I move TwiML directly into Bird? TwiML is Twilio’s instruction format; it is not a Bird sequence package. Rebuild the calling behavior around the intended prompts, inputs and decisions. Check any conference, queue, payment or media feature individually before planning a replacement. ## How should you compare the full cost? Start with the same destinations, call directions and expected duration. Include number rental, each connected leg, recording or transcription, and the speech and model runtime your design uses. A telephone-minute rate and a managed AI-conversation rate include different work; compare the total workflow. ## What does a careful migration involve? Inventory TwiML, Studio or application-generated instructions, Voice SDK clients, ConversationRelay sessions, recordings and callback endpoints. Separate the telephone connection from the application behavior you intend to keep. ### Map the behavior Map defined prompts and keypad branches to a Bird sequence. Keep live application decisions in your existing SIP or conversational application. Treat ConversationRelay as a speech-runtime dependency; replacing the telephone connection alone does not replace its managed speech services. ### Prove a complete call Use numbers you control to test audio, input, tool results, failure handling and the final record. Keep the old route available while validating the replacement. ### Plan the cutover Confirm number eligibility, porting or route changes, access and capacity. Preserve historical records and define how new call identities connect to your application. [Read the Twilio migration guide](/docs/guides/voice/migrate/twilio) ## Questions about Bird and Twilio ### Can I move TwiML directly into Bird? TwiML is Twilio’s instruction format; it is not a Bird sequence package. Rebuild the calling behavior around the intended prompts, inputs and decisions. Check any conference, queue, payment or media feature individually before planning a replacement. ### Can I keep my current phone numbers? Number eligibility and portability depend on the country, number type and existing provider. Confirm the path before planning a port. A number move and an application migration are separate changes. ### How should I evaluate call quality? Test the destinations and clients your customers use. Check connection rates, audio in both directions, interruptions, keypad input and clean hangup. For AI calls, include speech recognition and response timing in the complete conversation test. ### Should I start with signup or a specialist? Use a Bird workspace for a controlled technical evaluation. Speak to a Voice specialist about number migration, AI runtime integration, production routing and capacity. ## Prepare the next step - [Migrate from Twilio](/docs/guides/voice/migrate/twilio): Inventory your integration, test the replacement and prepare a controlled cutover. - [Voice comparisons](/products/voice/compare): Compare the integration and operating model across providers. - [Voice resource library](/products/voice/resources): Find the setup, explanation and troubleshooting guide. ## Primary documentation [Twilio calling documentation](https://www.twilio.com/docs/voice/twiml) [Twilio workflow documentation](https://www.twilio.com/docs/voice/conversationrelay) [Bird call sequences](/docs/guides/voice/call-sequences) [Bird AI voice integration](/docs/ai/voice-conversations) ## Plan your Twilio migration. Inventory the numbers, call control and application dependencies you use today. Test one complete journey with Bird before approving a wider cutover. [Read the migration guide](/docs/guides/voice/migrate/twilio) ## Related resources - [Voice overview](/docs/guides/voice/overview) (docs) - [What is a voice API?](/explained/voice/what-is-a-voice-api) (answer) - [Voice](/products/voice) (product) [Get an implementation brief](/learn/workspace?topic=voice)