SMS TRAFFIC YOUR WAY 

Stay on track with SMS traffic controls & cost management 

SMS Traffic Controls let you set spending limits, velocity caps, and country permissions that are enforced before any message is sent, preventing fraud and surprise costs. Available through the Sinch Conversation API. 

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Join over 200,000 businesses, including 8 of the 10 largest tech companies in the world

WHY IT MATTERS 

Keep your budget in line and reputation safe with proactive SMS safeguards 

Prevent fraud, stay on budget, and scale messaging with ease. SMS Traffic Controls make it simple to keep your campaigns safe and under control.  

Stop accidental overspending  

Block any message that would push you over daily, weekly, or monthly caps, so surprise invoices never land on your desk. 

Real-time fraud filters

Country blocks and velocity limits shut down SMS Pumping and other AIT attacks before you’re even charged.

Multi-tenant control  

Apply unique rules to each sub-account, keeping every customer or department secure while sharing one platform. 

ELIMINATE BILL SHOCK 

Stop surprise invoices with automatic SMS spending caps 

Set hard spending limits by day, week, or month. Sinch blocks any message that would exceed your cap, so you never pay more than planned, even during a fraud attack. 

  • Daily, weekly, or monthly caps  

  • Automatic block before send 

  • Instant alerts as limits approach 

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MITIGATE FRAUD & ABUSE 

Block SMS pumping and other artificially inflated traffic 

Restrict high-risk countries and throttle message velocity. Rules are enforced before you send, so AIT schemes are stopped cold with no retroactive charges or headaches. 

  • Country allow/deny lists

  • Velocity controls per second or minute

  • Real-time enforcement 

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ENFORCE BUSINESS RULES 

Apply unique rules across teams, customers, and campaigns

Create sub-accounts for every tenant and attach tailored spend, country, and speed policies. Ideal for SaaS platforms and enterprises with complex org charts. 

  • Separate limits per sub-account

  • Role-based access in dashboard

  • Clear cost visibility for each unit 

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REAL LIFE EXAMPLES 

Where Traffic Controls shine 

Fraud prevention  

Block traffic to high-risk countries known for Artificially Inflated Traffic (AIT) and shut down expensive attacks before they start. 

Budget adherence  

Cap a specific marketing campaign’s spending at its allocated budget and keep finance teams happy with predictable costs. 

Multi-tenant rate limiting  

Stop any customer on your SaaS platform from overwhelming sending capacity or racking up unexpected fees. 

Compliance enforcement  

Prevent accidental messages to sanctioned or non-compliant regions, supporting your internal and regulatory policies. 

Staging environment safety  

Set very low limits on non-production accounts to avoid accidental large-scale sends. 

WHAT’S INCLUDED 

Controls that keep your SMS secure and affordable 

Spending limits  

Set strict daily, weekly, or monthly budget caps and automatically block overages. 

Geographic permissions  

Allow or block sending to specific countries with a single click. 

Velocity controls  

Throttle message rate per second or minute to avoid traffic spikes and abuse. 

Alerts  

Get instant notifications as you approach or hit defined limits. 

Sub-account controls  

Apply different rules to individual customers, teams, or environments. 

Real-time enforcement  

All rules are checked before each message leaves the platform, never after. 

Granular controls  

Configure limits at the account or sub-account level for maximum flexibility. 

190+ country coverage  

Manage permissions across 190+ countries from one easy-to-use dashboard. 

Frequently asked questions about Traffic Controls 

They’re built-in tools that let you define spending limits, geographic permissions, and velocity caps that the Sinch platform enforces before a message is sent. 

By blocking high-risk countries and setting strict velocity and budget limits, you shut down common AIT vectors before any charges occur. 

Yes. Create a sub-account for each customer or department and attach a unique set of Traffic Controls to keep costs and risk separated. 

Choose daily, weekly, or monthly caps in the dashboard. Messages that would exceed your budget are automatically blocked before sending. 

The API returns an error for any message that violates a rule, and the message is not sent. You can also receive alerts as limits are approached. 

Yes. Traffic Controls are a standard, free feature included with your account when you use SMS via the Conversation API. 

Traffic Controls are a critical security feature, allowing businesses to enforce their own internal compliance and risk management policies. Country blocks and granular permissions help enforce internal policies and adhere to international sanctions or data residency rules. 

All you need is an active Sinch Conversation API account. Configure in the dashboard or via account management APIs.