These two are aimed at genuinely different buyers, and the difference is not really technical. Sendblue sells an API. Miss Blue sells an API and a place for your staff to work.
Side by side
| Miss Blue | Sendblue | |
|---|---|---|
| Published entry price | $99/mo dedicated (normally $198) | $100/line/mo |
| Entry plan sends outbound | Yes | No — reply-only |
| Dedicated line | $99/mo (normally $198) | Enterprise quote, reported ~$1,000/line |
| Free tier | Sandbox — simulated outcomes, no live number | No |
| Shared team inbox | Yes — Message Center | No |
| Team seats | Unlimited on Dedicated | Per line |
| SMS / RCS fallback | Yes, same number | Yes |
| CLI and MCP server | Yes — mb and mb mcp | Not published |
| Voice on the same line | Yes — paid add-on, $75–$300/line | No |
| SOC 2 / HIPAA | Not listed | Listed at enterprise |
| Setup fee | $205 only for a specific area code | Reported ~$2,000 |
| Backing | Not publicly disclosed | Y Combinator |
The reply-only trap decides this for most buyers
Sendblue's published $100/line plan cannot initiate conversations. If you are buying this to send appointment reminders or review requests, that plan cannot do the job and you are on the enterprise path. Miss Blue's $99 dedicated line sends outbound on day one, within its pacing limits. Full pricing detail.
Choose Miss Blue if
- Non-engineers will answer messages. The Message Center is the whole point, and no bare API replaces it.
- You want a dedicated line at a price you can see. $99/month is the cheapest published dedicated line in the category.
- Your team is more than one person. Unlimited seats on Dedicated is unusual and changes the maths against per-line competitors.
- You want to send outbound this month without a procurement cycle.
Choose Sendblue if
- You are building an inbound AI agent and the reply-only limitation genuinely does not matter. At $100/line that plan is honestly priced for what it does.
- You need a compliance posture on paper. Sendblue lists SOC 2 and HIPAA at the enterprise tier; Miss Blue lists neither.
- Track record is the deciding factor. Sendblue is the most established name here, and in a young category that is a real signal.
The limit to weigh seriously is reach, not Android
This used to say Miss Blue was iMessage-only. It is not, as of September 2026: a message to someone without iMessage re-routes to RCS, or to SMS where RCS is unavailable, from the same number and with nothing to configure. What has replaced it as the constraint worth checking is volume. A line is capped at fifteen messages a minute, and the recommended baseline is about thirty new outbound conversations per line per day at a 30% rolling reply rate — enforced, not advisory. Replies and ongoing threads do not count against it, and incoming messages are uncapped. If you need breadth rather than depth, the answer is more lines.
If neither fits, Sendblue alternatives covers the wider field, and the best iMessage API sorts every option by situation. Pricing across everyone is on the pricing page.
Common questions
- Is Miss Blue cheaper than Sendblue?
- For outbound, substantially. Miss Blue publishes a dedicated line at $99/month on its 50%-off sale (normally $198). Sendblue's published $100/line plan is reply-only, so outbound requires its quote-only enterprise tier, reported near $1,000 per line. Note that Miss Blue prices calling separately, at $75 to $300 a month per line.
- What does Miss Blue have that Sendblue does not?
- A Message Center — a shared team inbox non-engineers can work from — alongside the API. Sendblue is API-first. If your front desk will be answering messages, that difference decides the choice. Since September 2026 Miss Blue also ships an `mb` CLI and an MCP server over the same endpoints, and sells FaceTime Audio and phone calling as per-line add-ons on the messaging number; Sendblue publishes neither.
- What does Sendblue have that Miss Blue does not?
- Scale and track record. Sendblue is Y Combinator-backed and the most widely used name in the category, and it lists SOC 2 and HIPAA at its enterprise tier where Miss Blue lists neither. Fallback used to be on this list; as of September 2026 Miss Blue re-routes to RCS, or to SMS where RCS is unavailable, from the same number.