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Overview

In the US, mobile carriers only reliably deliver business (“Application-to-Person”) text messages from numbers tied to a registered business. Custral handles this registration for you through Twilio’s A2P 10DLC program: you provide your business and messaging details once, in Settings → Phone & SMS → Compliance, and we register your Brand and Campaign with The Campaign Registry. Until your campaign is approved, texts may be filtered or blocked (and you’ll see a “Set up SMS campaigns” prompt wherever you text).

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How it works

  • Brand: your business identity (legal name, address, and EIN for Standard brands). Registered and given a trust score by The Campaign Registry.
  • Campaign: your messaging use case (what you send and how recipients opt in).
  • Brand types: pick based on your business:
    • Sole Proprietor: no EIN required. Lower daily throughput, no registration fee. Best for small businesses and individuals.
    • Standard: requires an EIN. Higher throughput, full vetting.
    • Low-Volume Standard: a lighter Standard tier.
Registration is asynchronous. Carrier vetting takes anywhere from a few hours to a few days. The Compliance tab shows live Brand and Campaign status and notifies you when it completes.

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Using it

1

Open the Compliance tab

Go to Settings → Phone & SMS → Compliance.
2

Choose a brand type

Pick Sole Proprietor if you don’t have an EIN, otherwise Standard.
3

Fill in your details

Business name, address, industry, website, an authorized representative, and your messaging campaign, including sample messages and an opt-in description (how people consent to receive texts, and how they opt out by replying STOP).
4

Submit and wait

Submitting charges a one-time registration fee (in credits) and starts vetting. The status banner updates from pending to approved on its own. You can leave the page. You’ll be notified when it’s done.

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Costs

Registration consumes a one-time amount of Custral credits (covering Twilio’s Brand + Campaign fees). If your balance is too low, the wizard shows an insufficient_credits error. Top up and resubmit.

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Opt-out is automatic

Carrier rules require honoring opt-outs. Anyone who replies STOP is automatically opted out and Custral will refuse further texts to them; they can reply START to opt back in. This is handled for you. You don’t need to track it.

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Troubleshooting

When reporting an issue, include the request id shown in the error toast. It links the in-app error to the server logs.