# Bird vs Vapi for Voice Bird supplies the calling foundation for your phone system or conversational application. Vapi supplies an AI voice orchestration layer with assistant tools and SIP integration. The two can occupy different parts of the same calling stack. [Start for Free](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Fvoice%2Fonboarding) [Contact sales](/demo?product=voice-migrate-vapi) ## 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-vapi 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 | Vapi | | --- | --- | --- | | AI conversation orchestration | Connect a runtime that manages speech, reasoning and tools. | Configure assistants and built-in or custom tools for live conversations. | | SIP connection | Provide the SIP trunk and telephone connection for a compatible runtime. | Connect assistants through documented SIP integrations. | | Business actions | Your conversational application calls the system responsible for the action. | Assistant tools can call APIs and make the result available during a conversation. | ## When is Vapi a strong choice? Vapi is a strong fit when you want a managed assistant layer with built-in call tools and integrations. Evaluate it as a conversational runtime, rather than assuming a telephony provider alone replaces that behavior. ## 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. ## Could I use Bird and Vapi together? They can serve complementary roles when the SIP and media requirements of the integration match. Bird can provide the telephone connection while an assistant runtime manages the conversation. Validate both call directions, caller identity, audio and handoff before relying on that setup. ## 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 assistants, model and voice settings, custom tools, transferred-call behavior and the current telephony connection. Decide whether the project changes the carrier connection, the assistant runtime or both. ### Map the behavior For a telephony-only change, keep the assistant’s conversation behavior in its runtime and validate the new SIP connection. For a runtime replacement, reproduce tool permissions, interruption behavior and confirmed business outcomes as a separate project. ### 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 Vapi migration guide](/docs/guides/voice/migrate/vapi) ## Questions about Bird and Vapi ### Could I use Bird and Vapi together? They can serve complementary roles when the SIP and media requirements of the integration match. Bird can provide the telephone connection while an assistant runtime manages the conversation. Validate both call directions, caller identity, audio and handoff before relying on that setup. ### 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 Vapi](/docs/guides/voice/migrate/vapi): 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 [Vapi calling documentation](https://docs.vapi.ai/advanced/sip) [Vapi workflow documentation](https://docs.vapi.ai/tools/default-tools) [Bird call sequences](/docs/guides/voice/call-sequences) [Bird AI voice integration](/docs/ai/voice-conversations) ## Plan your Vapi 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/vapi) ## 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)