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Learn how to either automatically unsubscribe or send unsubscribe instructions when an inbound message likely includes an opt-out request.
Get step-by-step instructions for setting up call forwarding for your US toll-free number. Implementing call forwarding is a best practice for businesses sending SMS messages to the United States, as some states’ telemarketing laws can be interpreted to require SMS recipients to be able to call the number you are using to send text messages.
Learn about compliance keywords in Klaviyo, including what they are, how they work, and which languages they’re available in. In addition, it explains the options for when opt-out keywords can remove consent.
Learn how to configure the language and responses compliance keyword settings in Klaviyo. These settings help you personalize replies to your audience in each country.
Learn how to control when an opt-out keyword results in an unsubscribe.
Learn about the organizational prefix for SMS messages, including what it is, how to change it, when it’s enforced, and more.
Learn about the 2 opt-out options for an SMS: unsubscribe instructions or unsubscribe link. This article describes both options, including how they work and when each can be used.
Learn how to change your quiet hour settings in Klaviyo, including:
Learn about the company info link for SMS messages.
Learn about age-gating in Klaviyo, which may allow brands to send otherwise prohibited content via SMS in most countries where SMS is available.
Learn about age-gating content and why it’s important for SMS marketing. Here, we provide an overview of age-gating for SMS, including what is required and which industries require it.
Learn about which content is not allowed for SMS marketing.
Certain states — including Florida, Oklahoma, Oregon, and Maryland — have enacted regulations that limit how many promotional text messages a person can receive within a rolling 24-hour period. Klaviyo will now automatically enforce text message state law frequency limits for recipients in these states to help better protect your brand from potential violations.
Learn about the Canadian law that governs commercial electronic messages (such as email and SMS), which is the Canadian Anti-Spam Legislation (CASL).
Learn about the new Texas laws affecting businesses sending marketing text messages.
Learn about the compliance laws governing the SMS channel. When getting started with SMS marketing, it's important to have a grasp on the corresponding legislation. As with email, to avoid spam violations, it’s important to understand what spam is, the laws that regulate telemarketing spam (TCPA), and the organizations that protect consumers from spam (CTIA). Please note that Klaviyo cannot provide legal advice regarding US SMS compliance laws, and if you have questions about any of the points outlined in this guide, we recommend contacting legal counsel.
Find out about the FCC’s revocation rules that go into effect on April 11, 2025, and what updates Klaviyo made in response.
Learn about the requirements to run an SMS sweepstakes program in the US and Canada, as well as free draws and prize competitions in the UK.
Learn about key details of Oklahoma’s “mini-TCPA” and its potential impact on your SMS marketing efforts.
Learn about Florida laws that impact SMS marketing, including the Florida Telephone Solicitation Act (FTSA), also known as the Florida “mini-TCPA.”
Learn about compliance best practice for SMS in shopping cart abandonment flows. Shopping cart abandonment flows include abandoned cart, abandoned checkout, and added to cart flows.
Learn how local compliance laws including GDPR and PECR affect SMS marketing in the UK. SMS in the EU is regulated by the General Data Protection Regulation (GDPR), and SMS in the UK is regulated by the UK General Data Protection Regulation (UK GDPR). Additionally, in the UK, the Public and Electronic Communications Regulations 2003 (PECR) applies to the sending of marketing texts to individuals. While these laws are most commonly associated with data protection, they also dictate how to gather proper consent and what to include in your SMS messages.
Learn about best practices for SMS marketing in the European Union (EU).
Learn about New Zealand’s anti-spam legislation and its message requirements for SMS.
Learn about Australia's anti-spam legislation, and message requirements to help you remain compliant.
Learn about throughput for MMS and strategies for getting the most out of this channel in the United States, Canada, and Australia.
Learn the important aspects of SMS deliverability, including how to evaluate it and best practices.
Learn reasons why SMS message delivery can fail and best practices for avoiding failures.
Learn about Klaviyo’s account-level SMS deliverability reporting. The SMS tab in Klaviyo’s deliverability hub is a centralized space that allows you to analyze and diagnose your SMS deliverability health across all your sends.
Learn about AT&T spam traps, how Klaviyo notifies you if it detects that you may have been caught in the spam trap, and the steps you can take to rebuild your reputation with AT&T.
Learn about the differences between the various types of SMS shortened links: the default Klaviyo link, branded Klaviyo link, and branded custom link.
Learn about list cleaning for SMS, including why list cleaning is important, how to list clean, and when to clean your lists.