Miss Blue

A virtual iMessage line with a REST API and a shared team inbox on top of it.

Overview

The distinguishing choice Miss Blue makes is that the inbox is a first-class product, not an afterthought. You get a REST API for sending, receiving, attachments, reactions and conversation state, and you also get a shared inbox where a human on your team can take over a thread mid-conversation. For a five-person business that combination is often the whole requirement: automate reminders, but let a person answer when the customer asks something real.

That hybrid automation-plus-handoff model is explicitly what they build for, and their listed target industries are the ones where it fits — real estate, plumbing, HVAC, home services, restaurants and medical practices. These are businesses where the reply to 'your appointment is confirmed' is frequently a question only a human can answer.

On the developer side the API covers sending and receiving, attachments and reactions, managing conversation state, real-time delivery tracking, and number-level access through their routing. Full API documentation sits behind a sign-in, so plan on creating a free sandbox account to evaluate the exact request shapes.

Pricing is the other notable difference: their dedicated tier is described as unlimited on messages, contacts and team seats rather than metered per message. If your volume is spiky — a restaurant confirming a Saturday's worth of reservations — a flat line rate is much easier to forecast than per-message billing.

What stands out

What Miss Blue does well

Message Center inbox included

A shared, threaded inbox your whole team can work out of — no code required to answer a customer.

Automation with human handoff

Built around the assumption that a bot starts the thread and a person finishes it.

Unlimited on the dedicated tier

Messages, conversations, contacts and team access are described as unlimited rather than metered.

Reactions and conversation state in the API

Tapbacks and thread state are addressable, not just raw message sends.

Real-time delivery tracking

Delivery status and events surface as they happen rather than on a polling delay.

Priced to pilot

A free sandbox plus a low shared-number tier makes it cheap to prove the channel works for you first.

Pick Miss Blue if

Service businesses that need humans and automation in the same thread
Teams that want a shared inbox without building one
Predictable flat-rate billing instead of per-message metering
Small teams testing the channel cheaply before committing

Look elsewhere if

Teams that need published API docs before signing up — the reference is gated
Buyers who need a long public track record; it is a newer entrant than Sendblue

The API

Send a message

Note the link in the message body — it carries UTM parameters, so when the customer taps it the visit is attributed to this exact campaign instead of vanishing into direct traffic.

Illustrative only

How the tagging works

bash

# Shape is illustrative. Confirm against missblue.dev/docs.
curl --request POST 'https://api.missblue.dev/v1/messages' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "to": "+19998887777",
    "body": "Thanks for stopping in! Leave us a review: https://acme.co/review?utm_source=imessage&utm_medium=messaging&utm_campaign=review-request"
  }'

Illustrative only — Miss Blue's API reference sits behind a sign-in, so field names will differ. Create a free sandbox account and use their docs as the source of truth.

Pricing

What Miss Blue costs

List prices with promotional rates as shown on missblue.dev. Promotional pricing is described as locked in for accounts created during the sale — confirm the current terms directly before you commit.

Free sandbox

API testing before launch. No customer-facing number.

API access with test messages
Message Center preview
No live number

Shared number

$78/month

Live conversations on shared infrastructure. Listed at $39/mo during their promotion.

Shared Miss Blue number
Real two-way conversations
API and Message Center access

Dedicated

$198/month per number

Production line, unlimited usage. Listed at $99/mo during their promotion.

Private number
Unlimited messages, contacts and seats
Full API, real-time events, integrations

Enterprise

Custom

Multiple numbers, guaranteed terms, migration help.

Dedicated hardware
Account manager and faster support
Migration assistance

Check current pricing

Last checked August 2026.

Feature checklist

Capabilities

Outbound iMessage
Two-way replies
SMS / RCS fallback(not stated)
Group chats(not stated)
Typing indicators(not stated)
Read receipts
Reactions / tapbacks
Rich media
Webhooks
Shared team inbox
Dedicated number
Free sandbox

Before you commit

Do this first

The sandbox is free on every provider in this category. There is no reason to sign a contract before you have sent yourself a message.

Create the free sandbox account and send a message to your own phone.
Check what share of your customer list is actually on iPhone — your CRM may already know.
Write the three messages you would send most often, and read them out loud.
Tag the links in them before the first send, not after.
Run one play on a slice of your list and compare it to what you send today.

Independent guide, commercial links

We are not affiliated with Miss Blue. Links to providers on this site carry tracking parameters that identify us as the referrer. Everything above comes from Miss Blue’s own public pages, and vendor marketing figures are labelled as such rather than presented as findings.

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