# Bird vs Bandwidth for Voice Bird connects your SIP application to the same workspace as call sequences, operational records and your other Bird channels. Use it to bring the calling journey into your customer workflow while retaining the phone system or conversational runtime you choose. [Start for Free](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Fvoice%2Fonboarding) [Contact sales](/demo?product=voice-migrate-bandwidth) ## 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-bandwidth 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 | Bandwidth | | --- | --- | --- | | SIP connection | Connect an existing phone system or compatible conversational runtime. | Connect a SIP client through a realm and credentials. | | Inbound routing | Bind the receiving number to the intended SIP endpoint or call sequence. | Configure prioritized routes and weighted endpoints for incoming calls. | | AI runtime integration | Use SIP connectivity with the runtime that owns speech, reasoning and tools. | The documented Vapi integration uses Bandwidth for the call and Vapi for the assistant. | ## When is Bandwidth a strong choice? Bandwidth fits teams already using its SIP realms, routing and number configuration. Its Build setup and documented Vapi integration give concrete paths for connecting an existing SIP client or assistant runtime. ## 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 keep my existing PBX or AI runtime? You can evaluate a connection change while retaining the application if its SIP, authentication and media requirements match. Reconfigure the connection deliberately and verify incoming and outgoing calls, caller identity, audio and handoff. An existing integration is not proof of compatibility with a new carrier path. ## 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 realms, credentials, inbound route priorities, endpoint weights, phone-number assignments and any separate Programmable Voice behavior. For an AI integration, record the runtime and its inbound source rules separately from the carrier connection. ### Map the behavior Map the outbound client connection and inbound number route as separate operations. Preserve the customer-facing call behavior in the PBX or assistant runtime you intend to keep. Confirm how authentication, caller identity and media settings change before moving traffic. ### 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 Bandwidth migration guide](/docs/guides/voice/migrate/bandwidth) ## Questions about Bird and Bandwidth ### Can I keep my existing PBX or AI runtime? You can evaluate a connection change while retaining the application if its SIP, authentication and media requirements match. Reconfigure the connection deliberately and verify incoming and outgoing calls, caller identity, audio and handoff. An existing integration is not proof of compatibility with a new carrier path. ### 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. ### Does this comparison establish better call quality? No. The comparison describes documented product and integration choices. Test representative destinations, clients and audio paths to evaluate your own workload. ### 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 Bandwidth](/docs/guides/voice/migrate/bandwidth): 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 [Bandwidth calling documentation](https://dev.bandwidth.com/docs/voice/sip-trunking/sip-getting-started/) [Bandwidth workflow documentation](https://dev.bandwidth.com/docs/voice/integrations/vapi/) [Bird call sequences](/docs/guides/voice/call-sequences) [Bird AI voice integration](/docs/ai/voice-conversations) ## Plan your Bandwidth 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/bandwidth) ## 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)