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Maximum number of characters in a message

Updated at April 3rd, 2025

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Each channel has its own rules regarding the maximum number of characters that can be used to write a message. These rules may sometimes differ from those in the consumer app, such as WhatsApp.

✅ Alcmeon always gives you an indication of the number of characters allowed in a response, from the Conversation Page for advisors or from the bot scenario editor.

 

Here is the maximum number of characters that can be used for each channel:

Platform Channel Maximum number of characters
AlcmeonChat Message Unlimited
Facebook Messenger & Facebook Ratings 2000
Facebook Open posts, Wall comments, Ad comments Unlimited
Instagram Direct, Story mentions, Story replies 1000
Instagram Iinstagram Comments, Live Comments Unlimited
WhatsApp Message 4096
Apple Messages Message Unlimited
Line Message Unlimited
KakaoTalk Message 1000
Google Business Profile (formerly my Business) Reviews 4096
Trustpilot Reviews Unlimited
X (Twitter) Direct message Unlimited
X (Twitter) @mentions 280
LinkedIn Linkedin Comments Unlimited
TikTok Comments 150
message length character limit

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