How to migrate from Sinch to Infobip

Sinch is a cloud communications platform for messaging, voice, and email APIs, while Infobip is a global omnichannel communications platform covering the same channels plus a broader country footprint. Both are mature, full-stack providers, and on the messaging.dev Score they sit close together: Sinch rates 92/100 and Infobip 96/100. This guide covers what actually changes when you move sending code from Sinch to Infobip, based only on the two dataset entries.

What changes, and what doesn’t

Channels stay the same. Both providers support every channel we track: SMS, MMS, RCS, WhatsApp, Viber, Facebook Messenger, Telegram, Apple Messages for Business, voice, and email. You lose no channels and gain none by migrating.

Compliance and data residency are identical. Both hold GDPR, ISO 27001, SOC 2, and HIPAA alignment, and both offer EU and US servers with a data-residency choice. There is no certification or residency regression here. The regional footprint differs in the margins: Sinch also lists APAC, Australia, and Brazil; Infobip lists APAC, Latin America, Middle East, and Africa.

Where they actually differ:

• Pricing model. Sinch is pay-as-you-go per message with volume and committed-use pricing, and publishes a starting rate (approx. $0.0075 per US SMS segment, plus carrier fees). Infobip is primarily quote/contract-based (contact sales), with some pay-as-you-go options, and does not publish an SMS starting price. Expect to talk to sales to model costs.
• Country coverage: 150 (Sinch) to 190 (Infobip).
• Uptime SLA: 99.95% (Sinch) to 99.99% (Infobip).
• SDKs: both ship Java, C#, Python, PHP, and Node.js; Infobip adds Go. Sinch additionally lists no language you lose.
• Unchanged niceties: both offer a sandbox, free developer credit, high-quality docs, REST/SMPP/SMTP APIs, and direct operator connections.

How the request format differs

Sinch quickstart:

curl -X POST 'https://us.sms.api.sinch.com/xms/v1/YOUR_SERVICE_PLAN_ID/batches' \
  -H 'Authorization: Bearer YOUR_API_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{"from":"+15005550006","to":["+15551234567"],"body":"Hello from Sinch"}'

Infobip quickstart:

curl -X POST 'https://xxxxxx.api.infobip.com/sms/2/text/advanced' \
  -H 'Authorization: App YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json' \
  -d '{"messages":[{"from":"InfoSMS","destinations":[{"to":"15551234567"}],"text":"Hello from Infobip"}]}'

Three things change:

• Endpoint / base URL. Sinch posts to https://us.sms.api.sinch.com/xms/v1/{service_plan_id}/batches, with your service plan ID in the path. Infobip posts to https://{base_url}.api.infobip.com/sms/2/text/advanced, where {base_url} is your account-specific subdomain from the dashboard.
• Authentication. Sinch uses Bearer token auth (Authorization: Bearer YOUR_API_TOKEN). Infobip uses API-key auth with a different scheme: Authorization: App YOUR_API_KEY. Swap the header, not just the credential.
• Payload mapping. Sinch takes a flat object: from (E.164 with +), to (an array of strings), and body. Infobip nests everything under a messages array: sender becomes from (here an alphanumeric sender ID, InfoSMS), the recipient moves to destinations[].to (a string, no leading +), and the message text moves from body to text.

Migration checklist

1. Create an Infobip account and generate an API key from the dashboard; note your account {base_url} subdomain.
2. Map the request fields: from/to/body (flat) to messages[].from / messages[].destinations[].to / messages[].text (nested).
3. Re-point your sending code to https://{base_url}.api.infobip.com/sms/2/text/advanced and switch the auth header to Authorization: App {api_key}.
4. Re-test in Infobip’s sandbox (it has one) before sending live traffic. If you use an SDK, Infobip ships one for your language (Java, C#, Python, PHP, Go, Node.js).
5. Update webhooks and delivery-report callbacks to Infobip’s format so status events keep flowing.
6. Run both providers in parallel, comparing delivery on real numbers.
7. Cut over once parity holds, then decommission the Sinch path.

For a from-scratch walkthrough, see how to start with Infobip, and for a full side-by-side see the Infobip vs Sinch comparison.

Watch out for

• No public SMS pricing. Unlike Sinch’s published pay-as-you-go rate, Infobip’s SMS pricing is quote/contract-based and not listed, so budget for a sales conversation before you can forecast costs.
• Payload restructuring is where bugs hide. The move from a flat body to a nested messages/destinations array, dropping the + on destinations, and using an alphanumeric sender ID are all easy to get subtly wrong — validate against the sandbox first.
• No regressions elsewhere. You do not lose any channel, certification (GDPR, ISO 27001, SOC 2, HIPAA), EU/US residency, sandbox, free credit, or docs quality in this move.