FAQ
The questions people actually ask
Short answers, including the ones that are inconvenient for the companies selling this.
- Does Apple have an official iMessage API?
- No. Apple has never published a public API for sending or receiving iMessages programmatically. The closest official product is Apple Messages for Business, which is a customer-service channel with real restrictions — most importantly, the customer has to start the conversation. There is no Apple-sanctioned way to cold-message someone's iPhone as a blue bubble.
- Then how do services like Sendblue and Miss Blue send iMessages?
- They operate the Apple-side infrastructure themselves — real Apple accounts and devices, managed at scale — and put a REST API in front of it. You send an HTTP request; they turn it into a genuine iMessage from a phone number they provision for you. That is why they charge per line rather than per message: the line is the actual scarce resource.
- Is using a third-party iMessage API legal?
- Sending business messages is legal and routine. The rules that bind you are consent rules — in the US that means TCPA and, for the providers themselves, Apple's own terms. You need permission before you message someone, you need to honor opt-outs immediately, and you need to keep records of both. That obligation is yours regardless of which vendor you use.
- What about Apple's terms of service?
- This is the honest risk in the category. Apple does not offer this capability, so providers build on infrastructure Apple did not design for commercial messaging. Vendors manage that risk on your behalf and have run for years, but it is a platform dependency worth understanding before you make iMessage your only channel. Keep SMS or email as a fallback path.
- Do I still need A2P 10DLC registration?
- For iMessage specifically, no — 10DLC is a US carrier requirement for SMS, and iMessage does not travel over the carrier's messaging rails. Sendblue calls this out as a reason you can launch in minutes instead of weeks. But if you use SMS fallback, the SMS leg is still SMS, and consent obligations apply to you either way.
- What happens when my customer is on Android?
- Depends on the provider. Sendblue automatically falls back to RCS or SMS so you do not have to branch on handset. Others are iMessage-only, which means you need a second channel for the roughly 40% of US mobile users on Android. Ask this question before you buy — it is the difference between one system and two.
- How much does this cost?
- Roughly $40 to $200 per month per phone line, depending on provider and whether the number is shared or dedicated. Miss Blue lists a shared number at $78/mo and a dedicated one at $198/mo, both discounted during their current promotion. Sendblue lists $100/mo per dedicated line. Both offer a free sandbox, so you can build and test before paying anything.
- Can I just run this off a Mac mini in my office?
- Technically yes — open-source bridges like BlueBubbles do exactly that. Practically it means you own an always-on Mac, an Apple ID that can get flagged, a home internet connection as your uptime story, and every OS update as a potential outage. It is a fine hobby project and a bad foundation for customer communication.
- How do I know whether iMessage outreach is actually working?
- Tag every link you send with UTM parameters and let your analytics attribute the revenue. Without tags, messaging traffic lands in your reports as direct traffic and the channel looks like it did nothing. This is the single most common reason businesses conclude that messaging 'did not work'.
- Will people find business iMessages intrusive?
- They will if you treat the channel like email. iMessage sits in the same thread as someone's family, so the tolerance for volume is far lower and the tolerance for irrelevance is roughly zero. The businesses that do well here send fewer, more specific, more timely messages — and stop the moment someone asks them to.
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Get in touchFurther reading
Longer answers
What is an iMessage API?
What these services actually are, how they send a blue bubble without Apple's involvement, what you get for the money, and what you are trusting when you buy one.
7 min readComparisonsBest iMessage API in 2026
Sendblue, Miss Blue, LoopMessage, Blooio and Tuco AI, compared on price, capability and who each one actually suits. Including which to avoid for cold outreach.
12 min readStrategySending iMessages automatically
Yes — four ways, with very different reliability. Here is what each approach can do, what it costs, and which ones fall over in production.
8 min readStrategyThe economics of a per-line plan
Why iMessage providers charge per phone line rather than per message, what that means for a small sender, and how to work out whether a line pays for itself.
7 min readOperationsIs business iMessage legal?
Sending business messages is legal and routine. What binds you is consent law, and it applies regardless of which channel carries the message.
7 min readComparisonsBlueBubbles vs paid APIs
The open-source self-hosted option is real and works. Here is an honest account of what it costs you in time and risk, and the cases where it is the right answer.
7 min read