Constant Contact users have one keyword automatically included with their account. It’s called the Textt to Join feature and you can find more information about it in the Knowledge Base
Leadpages offers several LeadDigits based on your level of service. Leadpages is primarily a landing page service but the opportunity to have several text to opt-in keywords ultimately sold me on their complete package. Start a trial today.
Want to Learn More about How Text to Opt-In can be used for your business?
Listen to my Podcast Episode 104: Text to Opt-In