Migrate from Twilio to SIP.IO

Short answer: Migrating from Twilio to SIP.IO means three things: (1) get your numbers onto SIP.IO (port or provision), (2) recreate your call logic (Twilio webhooks return TwiML per step, while SIP.IO uses a declarative JSON call flow, also visual), and (3) if you use Flex/TaskRouter, recreate the routing as native ACD queues instead of hosting contact-center logic. You can run both platforms in parallel and cut traffic over gradually.

Concept mapping

Steps

1. Stand up an account and a number

Create an account and either port an existing Twilio number or provision a new DID to test with. Running a test number in parallel lets you validate flows before moving production traffic.

2. Recreate your call logic as a flow

Instead of a webhook that returns TwiML on every step, you describe the whole call once as a JSON flow (or draw it in the visual builder). A Twilio IVR that gathers a digit and routes to a queue becomes:

{
  "start": "menu",
  "nodes": [
    { "id": "menu",  "type": "menu",     "data": { "kind": "menu", "promptText": "Press 1 for sales, 2 for support", "maxDigits": 1, "timeoutSec": 5 } },
    { "id": "sales", "type": "enqueue",  "data": { "kind": "enqueue", "queueId": "q_sales" } },
    { "id": "supp",  "type": "enqueue",  "data": { "kind": "enqueue", "queueId": "q_support" } }
  ],
  "edges": [
    { "source": "menu", "target": "sales", "sourceHandle": "digit:1" },
    { "source": "menu", "target": "supp",  "sourceHandle": "digit:2" }
  ]
}

Dynamic logic that you’d compute in a TwiML webhook (look up a customer, branch on data) maps to the httpRequest and condition nodes, resolved inline without a per-step round-trip to your server.

3. Point the number at the flow

Set the DID’s route target to your published flow. For simple cases you can point a number directly at a queue or voicemail and SIP.IO synthesizes the flow for you.

4. Recreate contact-center routing (if you used Flex/TaskRouter)

Create queues with skills/tiers, attach agents, set business hours and overflow exits. This replaces TaskRouter workflows and Flex hosting with configuration. Supervisors get a live wallboard and you get queue CDR/KPIs out of the box.

5. Test in parallel, then cut over

Validate with your test number, move a slice of traffic, then port the rest. Keep both running until you’re confident.

What gets simpler

• No per-step webhook hosting: flows are declarative; conditional logic and HTTP lookups resolve inside the platform.
• No Flex build: the contact center is configured, not hosted.
• White-label is native: if you resell, you don’t rebuild multi-tenancy.

What to plan for

• Messaging: SIP.IO is voice-focused. If you rely on Twilio for SMS/WhatsApp, plan that channel separately.
• Ecosystem: rebuild any Twilio-specific integrations against SIP.IO’s HTTP API / SDKs.
• Number porting takes carrier lead time, so provision test numbers immediately and port in parallel.

FAQ

Can I port my Twilio numbers? Yes. Port existing numbers or provision new DIDs and migrate traffic gradually in parallel.

How does TwiML map over? Twilio returns TwiML per webhook call; SIP.IO uses one declarative JSON flow (also visual). Verbs map to nodes (Gather→menu/collect, Dial→dial, Enqueue→enqueue, Record→recording).

Do I have to rebuild Flex? No. SIP.IO’s contact center is configured, not built. You recreate routing as queues/agents/hours instead of hosting contact-center logic.

See the full SIP.IO vs Twilio comparison, or start free.