Sendblue iMessage API pricing
$100/line/mo for the reply-only plan; outbound is quote-only and reported near $1,000.
The tiers
AI Agent
$100per line, per month
- Send and receive without per-message charges
- Published price
Catch **Reply-only.** This plan lets you respond to people who text you first. It does not do outbound.
Enterprise
Quote onlyper line, per month
- Outbound messaging
- Higher volume
- Enterprise support
Catch Reported around $1,000 per line per month, plus a reported $2,000 setup fee.
Costs that are not on the pricing page
- A reported $2,000 upfront setup fee on the enterprise path.
- The published $100 plan cannot initiate conversations — the capability most buyers assume they are getting.
- Outbound pricing requires a sales conversation, which is a time cost before it is a money cost.
Sendblue is the best-known name in the category and, for most small businesses, the most expensive way into it. The pricing structure matters more than the headline number.
The published price is reply-only
This is the single most important pricing fact in the whole category. The $100/line AI Agent plan only lets you reply to people who text you first. If you want to send appointment reminders, review requests or any outbound campaign, that plan cannot do it and you are on the enterprise path.
For inbound AI agents — a customer texts your business, a model answers — the $100 plan is a genuine product at a reasonable price. For anything you initiate, budget for the enterprise conversation instead, and read what an iMessage API costs for how that compares across the category.
Sendblue is Y Combinator-backed and claims 35,000+ installations and $2.1B+ transacted through the platform. Those are vendor claims, reported as such — but the scale is real enough that it is the default name people encounter first.
Where these numbers come from
The $100 AI Agent price comes from Sendblue's published pricing page. The ~$1,000 enterprise figure and the $2,000 setup fee are **third-party reported** (including by competitors) and are not published by Sendblue. Confirm directly.
Best value for
Funded teams building inbound AI agents, or enterprises with budget and a procurement process.
