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Miss Blue vs Sendblue

Compare Miss Blue and Sendblue side by side: iMessage features, channels, developer tools, pricing and compliance, checked on each provider's own site.

Miss Blue

Dedicated iMessage line with API, team inbox and calling
Starting price
$99/month per number (launch price)
Free plan
Free sandbox; 30-minute live demo line
Visit Miss BlueRead more

Sendblue

iMessage API and CRM texting for sales and agents
Starting price
$100/month per line
Free plan
Free sandbox: shared number, up to 10 verified contacts, no webhooks
Visit SendblueRead more

Miss Blue supports 47 of the 77 features compared here, and Sendblue supports 58.

Where Miss Blue is ahead

Where Sendblue is ahead

and 5 more in the table below.

Feature comparison

FeatureMiss BlueSendblue
iMessage messaging
iMessage
Supported
Supported
Group chats
SupportedSend into an existing group by its chat_id and read group threads.
BetaGroup API is in beta on select plans. AI Agent plan can only reply in existing groups.
Group management
SupportedCreate groups of 2 to 32 and add or remove members; leaving a group is not supported yet.
BetaAdd and remove participants in iMessage groups via the beta groups API.
Group name and photo
SupportedRename a group and set or remove its photo.
SupportedRename groups and set group photos on supported lines.
Mentions
Not listed
Not listed
Tapbacks
SupportedAdd or remove the six tapbacks; tapbacks from customers appear on the message.
PartialSend classic tapbacks or any emoji. No inbound reaction events documented.
Threaded replies
SupportedQuoted replies with reply_to_message_id.
Supportedreply_to on V2 iMessage lines, in direct and group chats.
Typing indicators
SupportedSend typing, optional auto-typing on inbound iMessage, and contact typing via webhook.
SupportedSend and receive. iMessage 1:1 only, not in groups.
Read receipts
SupportedExplicit read receipts by API; outbound messages report read.
PartialCan mark chats read (1:1). Outbound statuses stop at DELIVERED, with no read status.
Edit and unsend
PartialUnsend within Apple's 2-minute window. An edit endpoint is documented, but the FAQ says editing is not supported yet.
Not supportedDocs say editing is not supported via API and delete does not unsend.
Message effects
Not supportedThe errors page says effects are not a supported API operation yet.
Supported13 send_style values.
Animated text effects
Not supportedThe errors page says expressive text styles and effects are not supported yet.
Not listed
Stickers
Not listed
Not listed
Formatted text
Not listed
Not listed
Attachments
SupportedImages, video, PDFs, Office files and more up to 100 MiB, one per send, or carousels of 2 to 20 images.
SupportedUp to 100MB on iMessage, 5MB on SMS.
Live Photos
Not listed
Not listed
Rich link previews
Not listed
PartialDocs say links expand only after the recipient saves your contact.
Voice messages
SupportedAudio-only sends use the native voice-note bubble by default.
SupportedSend .caf files to render as inline voice notes.
Contact cards
Not listed
SupportedSend .vcf files via media_url.
Polls
Not listed
Not listed
Chat backgrounds
Not listed
Not listed
Location sharing
SupportedSend Find My requests, read the sharing state and watch live fixes over Server-Sent Events.
SupportedFind My request, read and live watch. Dedicated iMessage lines only.
iMessage apps
Not listed
SupportedApp Cards for your own Messages extension. V2 lines, not on the free plan.
Live app cards
Not listed
PartialUpdates go out as new messages in the same App Card session; Sendblue says the original is not edited.
Sender name and photo
SupportedSet and verify the number's Name and Photo Sharing profile by API.
SupportedName and Photo Sharing profile per line, shared into direct iMessage chats.
FaceTime calls
PartialFaceTime Audio only, as a $250/month add-on per line.
PartialOutbound FaceTime audio over WebRTC (Agora). Needs a purchased FaceTime line.
Delivery status
Supportedpending, sent, delivered, read and failed with a reason, by webhook or per-message callback.
SupportedStatus callbacks from REGISTERED through SENT or DELIVERED.
iMessage availability check
SupportedLive iMessage and FaceTime registration lookup; a separate lookup reads your own past traffic.
SupportedLookup API checks a phone number or email for iMessage.
Focus and Notify Anyway
Not listed
Not listed
Numbers and delivery
Managed lines
SupportedEach number runs on a Mac that Miss Blue operates; staff provision numbers within about 48 to 72 hours.
Supported
Dedicated numbers
Supported$99/month per number at the launch price (normally $198).
Supported
Shared numbers
SupportedShared-pool numbers are offered as a separate, labelled option.
SupportedFree sandbox uses a shared number with verified contacts only.
Bring your own number
SupportedTransfer an existing number in; staff complete it in about 1 to 2 weeks.
PartialOnly by porting the number in, which adds 3 to 5 days.
Line pooling
SupportedAuto round robin spreads new contacts across a project's dedicated numbers, then keeps each on one.
SupportedNumber pooling with sticky sending. Automatic line selection needs account enablement.
SMS fallback
SupportedFalls back to RCS, or to SMS where RCS is unavailable, from the same number.
Supported
RCS fallback
SupportedFalls back to RCS where the carrier and recipient support it.
SupportediMessage, then RCS, then SMS. RCS on V2 lines.
Outbound-first messaging
SupportedNew contacts are paced: 50 per number per day by default and 150 messages a day in total.
SupportedFull outbound on Enterprise or Blue Ocean; Free and AI Agent plans are inbound-first
Calls on the iMessage number
SupportedFaceTime Audio and phone calls from the number customers already message.
SupportedDashboard calls and FaceTime from the texting number; API calls via your Twilio caller ID.
Other channels
SMS
SupportedAs fallback from the iMessage number; the docs also describe Twilio SMS lines.
Supported
RCS
SupportedAs fallback when the carrier and recipient support it.
SupportedV2 lines.
WhatsApp
Not supportedNot offered
Not supportedNot offered
Telegram
Not supported
Not supported
Slack
Not supportedNot offered as a channel; the Slack page is an integration guide.
Not listed
Email
Not supportedNot offered as a channel; iMessage can be sent to Apple ID email addresses.
Not supportedNot offered. iMessage can be sent to Apple ID email addresses.
Phone calls
PartialBrowser phone calls as a $75/month add-on; API keys cannot place regular phone calls.
PartialNo native calling API. Dashboard calls, outbound via your Twilio caller ID, inbound forwarding.
Apple Messages for Business
Not supportedNot offered
Not supportedNot offered
Unified channel API
SupportediMessage with RCS and SMS fallback, groups and calls share one API and webhook stream.
SupportedOne API for iMessage, RCS and SMS, the only channels offered.
Developer tools
REST API
Supported113 endpoints across 13 resources, with an OpenAPI file.
Supported
TypeScript SDK
Not listedThe API is plain HTTP; no SDK package was found.
Supportedsendblue on npm.
Python SDK
Not listed
Supportedsendblue on PyPI.
Other SDKs
Not listed
PartialGo, Rust and Ruby packages, listed as community packages.
CLI
Supportedmb, with installers for macOS, Linux and Windows.
Supported@sendblue/cli: signup, messaging, contacts and webhooks.
Webhooks
Supported
Supported
Signed webhooks
SupportedHex HMAC-SHA256 over timestamp and raw body; per-message callbacks are unsigned.
PartialSends your shared secret in an sb-signing-secret header. No HMAC signature.
MCP server
Supportedmb mcp serves the CLI commands as MCP tools for Claude Code, Codex, Cursor and others.
Supportedsendblue-api-mcp via npx.
Open source
Not supportedThe CLI repo holds builds and installers without a license; the service is closed.
PartialSDKs and CLI are MIT or Apache-2.0 on GitHub. The messaging platform is closed.
Self-hosting
Not listed
Not listedSold as a hosted service on Sendblue's Apple devices; self-hosting is not mentioned.
Local testing
Supportedmb_sandbox_ keys simulate outcomes and signed webhooks on a virtual number, with no phone.
Not listed
Custom channel providers
Not listed
Not listed
Event replay
PartialPer-endpoint delivery log and history sync; docs say to poll GET /v1/messages to repair missed events.
PartialNo replay. Docs say to repair gaps by listing messages updated since a timestamp.
OpenTelemetry
Not listed
Not listed
No-code integrations
BetaGoHighLevel connector is in beta; the Zapier, Make and n8n pages are setup guides.
SupportedZapier, Make and GoHighLevel. Docs FAQ says n8n resources are coming soon.
CRM integrations
BetaGoHighLevel connector in beta; HubSpot and Salesforce pages describe API builds set up in onboarding.
SupportedGoHighLevel, HubSpot, Salesforce, Close and Monday.com.
Built for AI agents
Agent framework
PartialNo agent SDK; offers a managed conversational AI add-on and multi-step automations.
PartialNo own framework. Maintains a Vercel Chat SDK adapter.
Agent framework integrations
PartialGuide pages for Vercel AI SDK, Chat SDK, LangChain and Claude Agent SDK; no adapter package found.
SupportedSendblue-maintained Vercel Chat SDK adapter.
Streaming replies
Not listed
Not supportedDocs say message editing is not supported via the API.
Agent group chats
Not listed
BetaA line can add another of your own dedicated lines to a group, via the beta groups API.
Human handoff
SupportedShared Message Center for human takeover, with internal notes and resolving.
SupportedShared team inboxes with assignment, and agents that escalate to a rep.
Audit logs
Not listed
PartialSecurity page says all API requests are logged. No customer-facing audit log documented.
Message history API
SupportedThread history by API and a conversation sync from the line's Mac.
Supported
Plans and compliance
Free plan
SupportedFree sandbox with simulated sends, plus a 30-minute live demo line by texting DEMO.
SupportedFree sandbox: shared number, up to 10 verified contacts, no webhooks.
Public pricing
Supported
SupportedAI Agent plan at $100/mo per line. Enterprise is custom.
No per-message fees
Supported
Supported
Uptime SLA
PartialEnterprise only: contracted service terms; no uptime figure published.
Supported99.99% uptime SLA on the Enterprise plan
Isolated infrastructure
SupportedDedicated numbers run on hardware assigned to you; Enterprise adds dedicated equipment.
SupportedA dedicated HIPAA instance for HIPAA customers
SOC 2 Type II
Not listed
SupportedSOC 2 Type II, report on request.
GDPR
Not listed
SupportedPrivacy policy says Sendblue adheres to GDPR. DPAs on request.

Checked on each provider's own site and docs on 2026-10-25. “Not listed” means the provider does not mention it.

Pricing

Miss Blue

A free sandbox for testing, then $99 per dedicated number per month at the launch price (normally $198), with the usual $479 setup fee waived until October 31; FaceTime Audio ($250), phone calls ($75) or both ($300) are optional add-ons per line, and Enterprise is custom.

Pricing model: flat per line

Source

Sendblue

A free sandbox for testing, the AI Agent plan at $100 per line per month for inbound-first use, and custom Enterprise pricing for outbound and volume.

Pricing model: flat per line, no per-message fees

Source

Which should you choose?

Choose Miss Blue if you need edit and unsend and local testing.

Choose Sendblue if you need message effects, rich link previews, contact cards and iMessage apps.

Frequently asked questions

More Miss Blue comparisons

Miss Blue alternatives

More Sendblue comparisons

Sendblue alternatives