# Choose the right foundation for your calls. Compare the telephone connection, calling workflow and conversational runtime separately. Find the integration that fits your customer journey, with practical migration guidance for each provider. [Start for Free](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Fvoice%2Fonboarding) [Contact sales](/demo?product=voice&source_page=%2Fproducts%2Fvoice%2Fcompare) ## 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 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) ## Compare three parts of the call. Start with the customer journey. Then decide which system owns each part of it. - **01** The telephone connection: Numbers, SIP connectivity, caller identity and destination coverage connect your application to the phone network. - **02** The calling workflow: Routing, prompts, keypad choices and call records determine what happens before, during and after a conversation. - **03** The conversational runtime: An AI assistant adds speech, business tools and decisions. Check how it connects to your telephony and hands over to a person. ## Compare your options Understand the integration before planning the move. Each comparison includes a practical migration guide. - [Twilio](/products/voice/compare/bird-vs-twilio): Compare TwiML, call instructions and managed speech with Bird’s calling model. - [Telnyx](/products/voice/compare/bird-vs-telnyx): Compare SIP connectivity, programmable calling and the assistant runtime. - [Vonage](/products/voice/compare/bird-vs-vonage): Compare NCCO instructions, application decisions and inbound routing. - [Vapi](/products/voice/compare/bird-vs-vapi): Decide where the telephone connection ends and AI orchestration begins. - [Bland](/products/voice/compare/bird-vs-bland): Compare assistant Pathways, SIP integration and business actions. - [Bandwidth](/products/voice/compare/bird-vs-bandwidth): Compare SIP realms, routing and the assistant connection. - [Plivo](/products/voice/compare/bird-vs-plivo): Compare inbound and outbound trunks, access and media configuration. ## Understand the calling model - [SIP trunking](/products/voice/sip-trunking): Connect your PBX, softphone or SIP application to the telephone network. - [Call sequences](/products/voice/call-sequences): Turn prompts, keypad choices and named branches into a versioned workflow. - [AI voice conversations](/products/voice/ai-voice): Bring a conversational runtime to the phone, with your context, tools and handoff. - [Voice resources](/products/voice/resources): Explore practical setup guides and clear explanations. ## Evaluate the call your customers make. Use your real destinations, clients and failure paths to compare providers. Keep the current service available while you test a small migration. [Explore Bird Voice](/products/voice) ## Related resources - [Voice overview](/docs/guides/voice/overview) (docs) - [What is a voice API?](/explained/voice/what-is-a-voice-api) (answer) [Get an implementation brief](/learn/workspace?topic=voice)