# Bird vs Sinch for SMS

Bird keeps SMS sending, 10DLC registration and delivery events under one API host and one key. Use the same product through its typed SDK, dashboard or hosted MCP server, from preparing a sender to investigating an individual message.

[Start for Free](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Fsms%2Fonboarding)

[Contact sales](/demo?product=sms-migrate-sinch)

## 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 provider-specific SMS migration guide. Prepare a test plan for sender registrations, consent, message fields, webhook signatures and delivery states. Keep the current provider running until I approve a cutover.

Use this Bird page as the starting context: https://bird.com/sms-api/compare/bird-vs-sinch
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.
```

[Read customer stories](/customers)

[Explore Enterprise](/enterprise)

- [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)

This comparison focuses on migration from Sinch’s SMS batch API. Sinch marks that API as end-of-sale and directs new integrations to its Conversation API. Evaluate that newer API separately when choosing a platform for a new application.

- Operate the channel: Bird
- SMS reach: Destination catalogue
- Carrier routes: Managed carrier routes
- Delivery visibility: Per-message outcomes

## What Sinch is great at. Where Bird is different.

### What Sinch is great at

- Java and .NET, for which Bird does not ship a server SDK. Their unified SDK covers Node.js, Java, .NET and Python. Teams that require those SDK languages should compare the supported operations with using Bird’s HTTP API.
- Delivery reporting you tune per batch. A batch picks its own delivery_report granularity and can override the service plan's callback URL for that send alone. Bird's events are a workspace-level subscription.
- Preview a batch before sending. Sinch’s SMS dry run can render personalized bodies and report segment counts before a batch is submitted.

### Where Bird is different

- An agent operates the account itself. The hosted MCP server at mcp.bird.com gives an agent tools that send SMS, read delivery status back and register 10DLC brands against your real workspace, without deploying your own MCP server.
- Recover an uncertain send. Reuse an Idempotency-Key with the same request within Bird’s three-hour retention window to recover the original result. After that window, the key can create a new request.
- Message intent is a first-class field. Every free-text send carries a category of transactional, marketing, authentication or service, which the Sinch batch has no counterpart for.

## Capability by capability.

Sinch gives batches their own reporting choices and offers Java and .NET clients. Bird brings sending and registration under one API host, with hosted account tools and a declared category on every free-text message.

| Capability | Bird | Sinch |
| --- | --- | --- |
| Send request | JSON to /v1/sms/messages on your regional host, with a bearer API key. | JSON to a batches endpoint under your service plan's path, with a bearer token. The primitive is a batch, so to is an array and the text field is body. |
| Safe retries | Reuse the same Idempotency-Key and request within Bird’s three-hour retention window. | The reviewed Sinch SMS batch request lists no send-idempotency parameter. Reconcile an uncertain request against message status before resubmitting. |
| Message intent | Every free-text send carries a category of transactional, marketing, authentication or service. | The batch has no field declaring a message's purpose. client_reference correlates and feedback_enabled asks for confirmation, and neither says why the message was sent. |
| Hosted MCP server | Bring your own agent. mcp.bird.com is hosted, so Claude Code, Cursor, ChatGPT or your own runtime signs in once and operates the workspace with the same tools. | Sinch provides a self-hosted API MCP package, @sinch/mcp, for real account actions. Its separate hosted Docs MCP supports documentation search without an account. |
| A2P 10DLC registration | /v1/sms/10dlc/* registers brands and campaigns over the API. | Their Registration API registers brands and campaigns on a separate host. Check SDK coverage for the registration operations you need. |
| One host for the whole channel | Sending, 10DLC registration, and delivery events share a base URL and key. | Sinch offers its SMS and Conversation APIs. Its Registration API has a separate host; the registration required depends on your sender and traffic. |
| Delivery events | A workspace webhook subscribed to the SMS event types you name, such as sms.sent, sms.delivered and sms.failed, delivered as JSON signed per Standard Webhooks. | A service plan holds the default callback URL, and each batch can override it and choose one of five delivery_report granularities. |
| SDK languages | SMS SDKs for TypeScript, Python, Go and PHP. Use the HTTP API from other languages. | A unified SDK for Node.js, Java, .NET, and Python. |

## The send call has a different primitive.

The Sinch example uses a batch request with a recipient array and body field. Bird’s single-message method takes one recipient and a category. Both return an API result before the final carrier outcome is known.

**Sinch** · send.ts

```typescript
import { SinchClient } from "@sinch/sdk-core";

const sinch = new SinchClient({
  projectId: process.env.SINCH_PROJECT_ID!,
  keyId:     process.env.SINCH_KEY_ID!,
  keySecret: process.env.SINCH_KEY_SECRET!,
  smsRegion: "us",
});

const response = await sinch.sms.batches.send({
  sendSMSRequestBody: {
    from: "+15557654321",
    to:   ["+15551234567"],
    body: "Your table is ready.",
  },
});
console.log(response.id);
```

**Bird** · send.ts

```typescript
import { BirdClient } from "@messagebird/sdk";

const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });

const message = await bird.sms
  .send({
    from:     "+15557654321",
    to:       "+15551234567",
    text:     "Your table is ready.",
    category: "transactional",
  });

console.log(message.id, message.status);
```

## What does SMS cost per country?

Read published destination rates on the [SMS pricing page](/pricing/sms) and check separately itemised [carrier and registration fees](/pricing/sms/fees). Include segments, sender rental and the applicable destination in your estimate. Ask an SMS specialist about an unpublished rate or a larger deployment.

## Switching cost: Plan the cutover.

For the single-recipient example, remove the service-plan path and map body to text. For multiple recipients, evaluate Bird’s batch of up to 100 independent messages or the campaign workflow separately. Move callbacks to workspace subscriptions and preserve client_reference in your application metadata.

Plan the registration and number cutover alongside the SDK change. Sinch documents HTTP Basic on its Registration API for limited testing and recommends OAuth for production. Preserve that authentication setup until the replacement is verified. Confirm the registration steps with Bird and arrange number porting before moving traffic.

[Read the migration guide](/docs/guides/sms/migrate/sinch)

## Questions people actually ask

### How do I test before switching traffic?

Start with a separate Bird sender and the documented sandbox recipient. Verify callbacks, failure handling, encoding and effective opt-outs. Move a small approved cohort before changing the production sender or routing.

### How long does an idempotency key protect a retry?

Bird retains an idempotent result for three hours. Reuse the same key and request in that window. After the retention period, submitting the key again can create a new request. An accepted request is not evidence that the recipient received the SMS.

### Is Bird a good Sinch alternative for SMS?

Bird is a strong Sinch alternative when you want SMS sending, registration and delivery tools in one workspace, with a typed SDK and hosted agent access. Compare the destinations, sender requirements and operational workflow your application needs. Sinch is worth retaining when batch-specific report controls or its Java and .NET clients suit your application.

### How different is the send call?

The primitive differs more than the fields do. Sinch's send is a batch: the recipient is an array, the message text is body, and the request is keyed on a service plan in the URL path. Bird sends one message to one recipient with text, on a regional host with a bearer key. The two real additions on the Bird side are category, which declares whether a message is transactional, marketing, authentication or service, and the Idempotency-Key header for matching-request retries within its three-hour retention window.

### Does Sinch have an MCP server?

Yes. Sinch’s API MCP server runs in your environment and can execute account actions. Its hosted Docs MCP serves reference material. Bird hosts its account tool server at mcp.bird.com with OAuth delegation, so the deployment and credential model differ.

### Do Bird and Sinch both support A2P 10DLC registration over an API?

Both do, and this is where the two differ in shape rather than capability. Sinch's Registration API registers brands and campaigns on its own host, with its own authentication and request contract; check the current SDK coverage for the registration operations your application needs. Bird puts /v1/sms/10dlc/* beside /v1/sms/messages under one base URL and one key. Either way the registration goes to The Campaign Registry; review the registration and number-linking work required for your migration.

### What can the agent actually do in my account?

Bird’s OAuth consent flow lets you choose the workspace or organization permissions to delegate. An agent’s grant is limited by the requested permissions, your approval and your own access. Review and revoke grants in Connected apps. Keep send authorization in the workflow; an agent connection does not establish customer consent.

### What does Bird SMS cost per country?

Use Bird’s published SMS rates and carrier fees for the destination and currency you need. Include billable segments, sender rental and registration costs. If a required rate is unavailable, ask a specialist for a quote.

## Build your evaluation

Test Bird with your workflow and inspect the original product references.

- [Sinch SMS batches](https://developers.sinch.com/docs/sms/common-operations/batches): Review batch sending, dry runs and reporting choices.
- [Sinch SDK and API lifecycle](https://github.com/sinch/sinch-sdk-node): Review SDK examples, authentication and the SMS API end-of-sale notice.
- [Sinch agent tools](https://sinch.com/ai/agent-tools/mcp/): Compare the self-hosted API server and hosted documentation tools.
- [Compare SMS providers](/sms-api/compare): Review the other provider comparisons and choose the integration questions that matter to your application.
- [Explore SMS campaigns](/sms-api/features/marketing): See the audience, content and launch workflow for your marketing team.

## Put the comparison to work.

Test Bird with a representative message and sender. For a Sinch migration, bring your destinations, traffic and existing integration to an SMS specialist.



## Related resources

- [Plan an SMS migration](/docs/guides/sms/migrate) (docs)
- [Choose a sender for your markets](/explained/sms/which-sms-sender-type-should-i-use) (answer)
- [Check your message segments](/tools/sms-segment-calculator) (tool)