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Overview

Allo lets you send and receive SMS directly from your business number — no personal phone needed.
SMS sending requires the Business plan. Starter users can receive SMS only.

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Before You Start — US & Canada Numbers Only

If you have a US or Canadian number, you must complete 10DLC registration before sending any SMS. This is a legal requirement — without it, your messages will be blocked by carriers.
Watch the setup guide below, then follow the steps.

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Setup — 3 steps

  1. Go to Settings > Compliance in your Allo dashboard
  2. Register your Brand — one-time fee of $24
  3. Create a Low Volume campaign once your brand is approved
Approval takes 3 to 7 business days. Start early so you don’t hit any delays.

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Sending Limits

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Daily limit

PeriodLimit
During trialSMS sending disabled
After trial150 SMS / day (no extra charge)

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Segment-based limits

Your daily limit is counted in segments, not characters. A single message can use multiple segments depending on its length and content.
Message typeCharacters per segmentDaily limit (T-Mobile/Sprint)
Plain text (GSM-7)1602,000 segments = 320,000 chars
Unicode (emojis, symbols)702,000 segments = 140,000 chars
Once you reach 2,000 segments sent to T-Mobile/Sprint users in a day, all further messages to those carriers are blocked until midnight.
A 161-character message = 2 segments, not 1. Keep messages under 160 characters (plain text) to stay efficient.

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FAQ

Yes. 10DLC registration is required for any US number, no matter where you’re located. If you have a US number, you must register to send SMS.
No. It’s a one-time $24 fee for your entire company — covers all users and all numbers.
You can assign up to 50 phone numbers to a single Low Volume campaign by default.
The SMS composer will appear in your Allo inbox and you can start sending immediately.
Yes. 10DLC registrations don’t transfer between providers. You’ll need to re-register your brand with Allo and create a new campaign.