Sendblue Pricing 2026: Complete Breakdown

Sendblue publishes three tiers, and only the unpublished one sends outbound. As of 10 September 2026, sendblue.com/pricing lists a Free Sandbox at $0, an AI Agent plan at $100/month per dedicated line, and an Enterprise tier at custom pricing. Both published tiers are inbound-first — contacts have to text you before you can reply. "Full outbound messaging" appears only under Enterprise, which is Contact Sales.

Every figure below was read directly from Sendblue's own pricing page on the date above. Where a number is not published by Sendblue, it is labelled as reported and you should confirm it with them.

The short answer

If your motion is outbound — speed to lead, reminders, reactivation — the published prices do not apply to you.

Sendblue's published tiers, in full

Free Sandbox — $0

A genuine free tier, and Sendblue is clear about its limits on their own page: shared phone number, full API access, up to 10 verified contacts, CLI and SDK support, community support. It explicitly lists no dedicated phone number, no outbound messaging, and no webhooks or callbacks. This is a test environment, not a starter plan — but it is a real one, and most competitors do not offer it.

AI Agent — $100/month per dedicated line

Sendblue's "Most Popular" tier, described on their page as "For production inbound messaging at scale." You get a dedicated phone number, inbound-first messaging, 1,000 inbound contacts per day, webhooks and callbacks, media, typing indicators and reactions, and priority support.

The important word is inbound-first. At $100/month this looks like the cheapest real iMessage line in the category, and for a support or service desk it may well be. It cannot start a conversation.

Enterprise — custom, Contact Sales

Described as "For outbound teams and high-volume deployments." It adds full outbound messaging, multiple dedicated lines, SOC 2 and HIPAA, and a dedicated account manager. Pricing is volume-based and quoted on request.

Teams who have moved away from Sendblue commonly report figures around $1,000 per line per month for outbound. That figure is not published by Sendblue and we cannot verify it — treat it as a data point from switchers, not a price. Ask them directly.

What Sendblue charges nothing for

Worth stating plainly, because it is a real strength and it is published:

• $0 per-message fees
• $0 A2P 10DLC registration
• $0 carrier surcharges
• $0 SMS fallback fees

A "line" on Sendblue is a dedicated phone number that sends and receives iMessage, SMS and RCS. Volume discounts are available on 10+ lines, and annual billing discounts exist through their sales team.

Sendblue vs Tuco AI: the numbers side by side

Where Sendblue is genuinely the better buy

We would rather you pick correctly than pick us. Sendblue wins outright when:

• You need SOC 2 Type II or HIPAA. Sendblue is the only vendor in this category carrying both. Tuco AI carries neither and says so on our limitations page. If protected health information or a procurement security review is in scope, this decides it.
• Your volume is inbound. At 1,000 inbound contacts a day for $100, nothing else in the category is close for a support or service desk.
• You want to test before you commit. The free sandbox is real, and there is no equivalent elsewhere.

Where the pricing becomes a problem

• Outbound has no published price. The tier most sales teams need is a sales conversation, which means you cannot budget the channel before talking to someone.
• The $100 headline is doing a lot of work. It is repeated widely as "Sendblue starts at $100" without the inbound-first qualifier, which makes every outbound competitor look expensive by comparison against a plan that cannot do the job.
• No published daily outbound cap. Every vendor running real Apple hardware faces roughly the same ceiling — around 50 new contacts per line per day — but only some print it. Tuco publishes ~50 new and ~150 total per line per day, and explains why the cap exists.

Sendblue API, CLI and SMS pricing

These come up as separate searches, but on Sendblue they are the same bill:

• API pricing — there is no separate API price. Full API access is included on every tier, including the $0 sandbox. What changes by tier is capability: no webhooks or outbound on Free, webhooks and inbound on AI Agent, outbound on Enterprise.
• CLI pricing — the CLI is not billed separately either. CLI and SDK support are listed on the Free Sandbox tier, so you can drive it at $0 within the sandbox limits.
• SMS pricing — no separate SMS charge and $0 SMS fallback fees. A line covers iMessage, SMS and RCS. Note this is unusual: with most providers the SMS fallback leg still follows carrier rules and A2P 10DLC registration.

Is Sendblue's pricing transparent?

Partly, and the distinction matters more than a yes or no.

Transparent: the sandbox and AI Agent prices, the $0 fee structure, the SOC 2 Type II certification, and the plan limitations — Sendblue lists "no outbound messaging" on its own free tier rather than burying it.

Not transparent: the price of outbound, which is the number most buyers arriving at that page are looking for.

For comparison, Tuco AI publishes the monthly figure and the setup fee for every line count from 1 to 50 — 5 lines is $725/mo plus $840 setup, 10 lines is $1,400/mo plus $1,670 — along with the daily sending caps and a 13-item list of what the product cannot do. We also publish a corrections page for when someone finds a figure of ours that is wrong.

What Tuco AI costs, for comparison

• Starter — $149/mo: one dedicated line, ~50 new contacts/day, ~150 total messages/day, outbound included.
• Growth — $299/mo: two dedicated lines.
• One-time setup from $335, scaling with line count.
• Monthly or annual (20% off annual), month to month with no minimum term. No refunds — we buy real hardware per line up front.
• No per-message fees at any tier.
• Apple ID recreation if a number gets flagged — first replacement free, second and third $50.

Year one on Starter is about $2,123. Against Sendblue that comparison is only honest if you are comparing outbound to outbound — and Sendblue's outbound number is a quote, not a price.

Should you switch from Sendblue?

Switch if you need outbound at a price you can see, month-to-month billing with no minimum term, and published sending caps. Do not switch if you need SOC 2 or HIPAA, or if your volume is genuinely inbound — Sendblue is better at all three and Tuco AI will not pretend otherwise.

If you do move: export contacts and sequences, budget 48 hours minimum for carrier eSIM activation, and plan for a new number, because Tuco AI does not port existing ones.

See the outbound price before you talk to anyone

$149/mo with outbound included, every line count from 1 to 50 published, and a limits page listing all thirteen things we cannot do.

See Tuco pricing | Get started

Related reading:

• Sendblue alternative: honest comparison for 2026
• Sendblue vs Tuco AI — full feature comparison
• Sendblue vs Linq Blue vs Tuco AI
• Best iMessage API 2026 — ranked on a published rubric
• iMessage API pricing comparison across all providers