MessageBlue vs Sendblue

MessageBlue supports 38 of the 77 features compared here, and Sendblue supports 58.

Feature comparison

Feature	MessageBlue	Sendblue
iMessage messaging
iMessage	Supported	Supported
Group chats	SupportedSend text, attachments and voice notes to groups; receive group messages.	BetaGroup API is in beta on select plans. AI Agent plan can only reply in existing groups.
Group management	PartialCreate groups of 2 to 31 by API; no add or remove participant endpoints.	BetaAdd and remove participants in iMessage groups via the beta groups API.
Group name and photo	Not listed	SupportedRename groups and set group photos on supported lines.
Mentions	Not listed	Not listed
Tapbacks	SupportedSend or remove emoji or tapbacks; inbound tapbacks arrive by webhook.	PartialSend classic tapbacks or any emoji. No inbound reaction events documented.
Threaded replies	Not listed	Supportedreply_to on V2 iMessage lines, in direct and group chats.
Typing indicators	SupportedSend and stop, up to 20 seconds; no inbound typing webhook documented.	SupportedSend and receive. iMessage 1:1 only, not in groups.
Read receipts	SupportedSend read receipts; outbound messages report a read status.	PartialCan mark chats read (1:1). Outbound statuses stop at DELIVERED, with no read status.
Edit and unsend	Not listed	Not supportedDocs say editing is not supported via API and delete does not unsend.
Message effects	Not listed	Supported13 send_style values.
Animated text effects	Not listed	Not listed
Stickers	Not listed	Not listed
Formatted text	Not listed	Not listed
Attachments	SupportedAttachments by public URL.	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	SupportedTo individuals and groups.	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	Not listed	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	Not listed	SupportedName and Photo Sharing profile per line, shared into direct iMessage chats.
FaceTime calls	Not listedInbox video call button is marked coming soon; voice calls need the team to enable.	PartialOutbound FaceTime audio over WebRTC (Agora). Needs a purchased FaceTime line.
Delivery status	Supportedsent, delivered, read, SMS_FALLBACK and failed via status webhook.	SupportedStatus callbacks from REGISTERED through SENT or DELIVERED.
iMessage availability check	SupportedCheck a number, or a whole group's participants, before sending.	SupportedLookup API checks a phone number or email for iMessage.
Focus and Notify Anyway	Not listed	Not listed
Numbers and delivery
Managed lines	SupportedRequest a number and the team provisions it, typically in 3 to 5 business days.	Supported
Dedicated numbers	Supported$100/mo per line on Startups & SMB.	Supported
Shared numbers	Not listed	SupportedFree sandbox uses a shared number with verified contacts only.
Bring your own number	SupportedPair your own Mac and its Apple ID number with the MessageBlue agent.	PartialOnly by porting the number in, which adds 3 to 5 days.
Line pooling	SupportedAssigns the least-mapped number per contact and remaps contacts if a number is blocked.	SupportedNumber pooling with sticky sending. Automatic line selection needs account enablement.
SMS fallback	SupportedStatus event reports SMS_FALLBACK; not available for group creation.	Supported
RCS fallback	Not listedMarketing pages say SMS or RCS fallback; docs only describe SMS.	SupportediMessage, then RCS, then SMS. RCS on V2 lines.
Outbound-first messaging	SupportedStart chats with any iMessage-capable number; warns after 5 unanswered messages.	SupportedFull outbound on Enterprise or Blue Ocean; Free and AI Agent plans are inbound-first
Calls on the iMessage number	Not listedInbox voice call button says to contact the team; number used is not stated.	SupportedDashboard calls and FaceTime from the texting number; API calls via your Twilio caller ID.
Other channels
SMS	PartialOnly as fallback; new chats need an iMessage-capable recipient.	Supported
RCS	Not listedMentioned only as a fallback on marketing pages.	SupportedV2 lines.
WhatsApp	Not supportedNot offered	Not supportedNot offered
Telegram	Not supported	Not supported
Slack	Not supported	Not listed
Email	Not supported	Not supportedNot offered. iMessage can be sent to Apple ID email addresses.
Phone calls	Not listedInbox voice call button says to contact the team; call type and number not stated.	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	PartialOne API for iMessage and its SMS fallback only.	SupportedOne API for iMessage, RCS and SMS, the only channels offered.
Developer tools
REST API	SupportedOpenAPI 3.1 spec published.	Supported
TypeScript SDK	Supportednpm messageblue (0.0.7), generated from the OpenAPI spec.	Supportedsendblue on npm.
Python SDK	Not supportedDocs say only TypeScript is published today; other languages on request.	Supportedsendblue on PyPI.
Other SDKs	Not supported	PartialGo, Rust and Ruby packages, listed as community packages.
CLI	Not listedThe API page mentions a CLI, but none is documented.	Supported@sendblue/cli: signup, messaging, contacts and webhooks.
Webhooks	SupportedInbound and status URLs with retries and dead-lettering.	Supported
Signed webhooks	SupportedX-MB-Signature: HMAC-SHA256 over timestamp and raw body.	PartialSends your shared secret in an sb-signing-secret header. No HMAC signature.
MCP server	PartialDocumentation-only MCP server at docs.messageblue.ai/_mcp/server.	Supportedsendblue-api-mcp via npx.
Open source	Not listed	PartialSDKs and CLI are MIT or Apache-2.0 on GitHub. The messaging platform is closed.
Self-hosting	SupportedEnterprise plan: your cloud (BYOC), VPC or on-prem	Not listedSold as a hosted service on Sendblue's Apple devices; self-hosting is not mentioned.
Local testing	PartialBrowser test bench runs the no-code agent without sending an iMessage.	Not listed
Custom channel providers	Not listed	Not listed
Event replay	SupportedFailed and dead-lettered deliveries are kept and can be replayed.	PartialNo replay. Docs say to repair gaps by listing messages updated since a timestamp.
OpenTelemetry	Not listed	Not listed
No-code integrations	SupportedZapier, plus a no-code agent builder.	SupportedZapier, Make and GoHighLevel. Docs FAQ says n8n resources are coming soon.
CRM integrations	SupportedAgent connects to Salesforce, HubSpot and others; HubSpot inbox sync is private beta.	SupportedGoHighLevel, HubSpot, Salesforce, Close and Monday.com.
Built for AI agents
Agent framework	SupportedNo-code agent with model choice, prompt, knowledge, tools, memory and multi-step tasks.	PartialNo own framework. Maintains a Vercel Chat SDK adapter.
Agent framework integrations	Not listedSite says it works with LangChain and the Vercel AI SDK via webhooks; no official integration.	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	SupportedTeam inbox for manual replies; pause the agent or block it per contact.	SupportedShared team inboxes with assignment, and agents that escalate to a rep.
Audit logs	SupportedOn the Business and Enterprise plans	PartialSecurity page says all API requests are logged. No customer-facing audit log documented.
Message history API	SupportedConversation by phone number.	Supported
Plans and compliance
Free plan	Supported$0 when you bring your own number on your own Mac; every feature included.	SupportedFree sandbox: shared number, up to 10 verified contacts, no webhooks.
Public pricing	SupportedFree and $100/mo listed; Business and Enterprise are contact sales.	SupportedAI Agent plan at $100/mo per line. Enterprise is custom.
No per-message fees	SupportedFlat $100/mo per line.	Supported
Uptime SLA	Supported99.9% SLA listed from the $100 plan; the API page says enterprise plans	Supported99.99% uptime SLA on the Enterprise plan
Isolated infrastructure	SupportedEnterprise plan: single-tenant or self-hosted stack	SupportedA dedicated HIPAA instance for HIPAA customers
SOC 2 Type II	PartialEnterprise page claims audited SOC 2 Type II; pricing says SOC 2 ready; no report found.	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

Which should you choose?

Choose MessageBlue if you need self-hosting and local testing.

Choose Sendblue if you need group name and photo, threaded replies, message effects and rich link previews.

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