iMessage API Pricing in 2026: Every Provider Compared

Per-message or per-line? The two models, explained#

Metered billing (pay per message) and flat billing (rent a line) are the two models. Metered scales with volume, flat is a fixed monthly cost. Flat per line has won in iMessage; every major provider sells it. Linq pitches "save thousands vs. pay-per-message" and Sendblue advertises $0 per-message fees, $0 A2P registration, $0 carrier surcharges.

Comparing iMessage to SMS means comparing two different billing shapes. Metered starts near zero and scales linearly. Flat is a wall you pay whether you send 10 or 100,000 messages. The breakeven is where those two lines cross, then whether the booked appointments justify the extra cost.

• Metered: cost = fixed overhead + (rate x volume). Cheap at low volume, punishing at scale.
• Flat per line: cost = lines x monthly rate. Expensive at low volume, effectively free at the margin.
• The trap: most iMessage vendors sell flat per line but cap you on new conversations per day, which quietly reintroduces metering.

Every iMessage API provider's published pricing, July 2026#

Pricing verified July 24, 2026 from vendor pages. iBluSend bills per iPhone you connect (2, 5, or 15 depending on tier); myCRMSIM connects your own SIM. Both shift device and carrier costs to you.

Advertised prices are inbound only#

Headline prices are almost always inbound-only. Outbound costs two to ten times more. Sendblue's $100/mo includes only 1,000 inbound contacts; outbound sits on Enterprise at custom quote. Blooio's $109/mo Inbound can't start new conversations; that's the $289/mo Commercial tier. LoopMessage's $59.99 Light needs a $30/mo add-on for outbound.

Price the outbound tier if you're doing B2B prospecting. LoopMessage Light real cost is base $59.99 plus $15 number plus $15 fallback plus $30 outbound: $119.99/mo, double advertised.

At what volume does flat beat per-message?#

Around 21,000 segments per month at $249/line, or 13,400 at $162.50/mo annual. Below that, metered SMS is cheaper. Above it, flat wins and keeps winning. Math: Twilio is $0.0083/segment plus $0.004 carrier, so $0.0113 all-in. Overhead: $1.15 long code plus $10 campaign fee = $11.15/mo. Formula: $249 = $11.15 + ($0.0113 x segments). Crossover: 21,049 segments, roughly 2,630 contacts at four touches each.

The crossover is a floor. Metered cost climbs linearly; flat stays fixed. At 100,000 segments, metered costs $1,141 vs. $249 flat.a 4.6x gap.

• Variable metered rate used: $0.0083 Twilio segment + roughly $0.004 blended carrier surcharge = $0.0123
• Fixed metered overhead: $1.15 long code + $10.00 campaign = $11.15/mo
• Crossover formula: flat monthly price = $11.15 + ($0.0113 x segments)

Does flat pay for itself below the crossover?#

Below the crossover, flat costs more in dollars. The only justification is booking more appointments. At 5,000 segments/mo, an annual line ($162.50) vs. metered ($67.65) needs a 2.40x appointment lift to break even. At 10,000 segments it drops to 1.31x. At 13,400 it's 1.00x; past that you're ahead on cost and outcome.

Under 4,000 segments/mo (~500 contacts on four touches), a 3x lift barely covers flat. Between 4,000-13,400 segments, flat costs more but 2-3x lift pays for it. Above 13,400 annual (21,000 monthly), flat is cheaper in absolute dollars and books more meetings. Metered also requires A2P registration with wait times, plus carrier filtering; the segment math assumes sent messages actually arrive.

You're metered on new conversations, not messages#

Nearly every provider advertises unlimited messaging. The real meter is new conversations per day. What separates a $39 plan from a $289 plan is how many first-time contacts you're allowed each day. Divide monthly cost by daily conversation allowance to get cost per conversation slot across vendors. The spread: $7.80 down to $0.16 per slot.

• Blooio Commercial Dedicated ($289) and Blue Reacher ($249) don't publish a daily conversation cap, so the denominator is set by your list size instead of your plan.
• Low cost per slot is only useful if you can actually fill the slots. Buying 1,000 daily conversations at $0.16 each is worse than 50 at $5.00 if you only have 60 leads a day.
• Sanity-check any plan against your real daily lead flow before optimizing this number.

Who publishes pricing vs. makes you call?#

Ten of twelve publish something. Linq and Chert publish nothing. Sendblue publishes only inbound tiers while gating outbound behind a custom quote. Sales-gating isn't bad on its own.Linq and Chert sell enterprise with custom SLAs and volume commitments, making public pricing hard. But for teams wanting three lines next week, the gate costs two weeks and a blind negotiation.

Published pricing matters because it's the difference between buying Tuesday and buying next month. If you're quoted, walk in with the crossover number and comparable prices. Quoted prices should land between $99-$289/line, the band the published market sits in.

How to pick#

Calculate monthly outbound segments (contacts × touches × segments/msg). If above 21,000, flat wins on cost alone. Price the outbound tier, not advertised price; add every add-on. Divide by actual daily lead flow, not plan maximum, to see real cost per conversation.

Then weigh spreadsheet misses: no A2P means send this week, native CRM is one tool not two, no device fleet to babysit. Blue Reacher: $249/mo or $1,949/yr, unlimited iMessages (50 opted-in / 30 cold new contacts/day), RCS then SMS fallback, white-glove setup.

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