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What is sendblue?

SendBlue is a messaging platform that lets you send iMessage, SMS, and RCS messages directly from your CRM or through a REST API. It's designed for businesses that want to reach customers through personal messaging channels rather than traditional business SMS alone. The service reports 2-3 times higher response rates than standard SMS, likely because iMessage and RCS can feel more personal than A2P (Application-to-Person) messaging. A notable advantage is that it doesn't require A2P registration, which speeds up setup. The platform is SOC 2 certified for security and is used by over 20,000 businesses.

Key Features

iMessage, SMS, and RCS sending

Send messages across multiple protocols from a single platform

CRM integration

Embed messaging directly into your existing CRM workflow

REST API

Build custom messaging functionality into your own applications

No A2P registration required

Faster setup without carrier approval processes

Response rate tracking

Monitor engagement metrics across your campaigns

Pros & Cons

Advantages

  • Higher response rates compared to standard SMS due to iMessage and RCS support
  • Reduces friction by removing A2P registration requirements
  • Works within existing CRM systems, minimising disruption to current workflows
  • SOC 2 certified, indicating strong security and compliance practices

Limitations

  • Pricing at $100 per line per month is relatively high for smaller teams or those testing the service
  • iMessage delivery depends on Apple's ecosystem; not all contacts will have iMessage capability
  • RCS adoption is still inconsistent across carriers and geographies, limiting reliability

Use Cases

Sales teams using CRM systems who want to reach prospects via iMessage for higher engagement

Customer support teams sending time-sensitive notifications and confirmations to existing customers

E-commerce businesses contacting customers about orders, returns, and promotions

Real estate agents and account managers who rely on personal relationships and quick back-and-forth communication