Can you send a mass iMessage blast?
No, and no credible platform lets you. Every real iMessage provider paces new conversations per line, because blasting is what gets a number flagged and a flagged number delivers to nobody. What works instead is paced outreach: a dedicated line starting a steady number of personal-reading conversations a day, with unlimited back-and-forth once someone replies.
The pacing numbers are published across the category rather than hidden: lines pace at 50 opted-in / 30 cold new contacts a day on Blue Reacher, and rival platforms publish caps in the same range. A team that needs more reach adds lines, so ten lines cover several hundred fresh contacts a day without any one number behaving like a broadcaster. The math per line is in How many iMessages can you send per day?
Blast-shaped sending also fails commercially before it fails technically. A thousand identical messages produce opt-outs and complaints; thirty well-aimed conversations produce replies, and replies are never metered. The full-funnel version of that motion, cold outreach through reactivation, is on iMessage for sales.
If the job really is one-way announcements to a large opted-in list, SMS broadcast tools are built for exactly that and price by volume. The comparison between the two jobs is covered in Is iMessage better than SMS for sales?
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