What is the difference between Miss Blue and Linq?

Miss Blue supports 47 of the 77 features compared here, and Linq supports 63. Miss Blue adds FaceTime calls, bring your own number, local testing and human handoff. Linq adds mentions, message effects, animated text effects, stickers and formatted text.

How much do Miss Blue and Linq cost?

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. Linq: Hobby is free with up to 20 contacts through the CLI, Pro starts at $260 a month with a 7-day free trial, and Enterprise is custom.

Does Linq support FaceTime calls?

Linq does not support FaceTime calls.

Does Linq support bring your own number?

Linq does not list bring your own number on its site or in its docs.

Does Linq support local testing?

Linq does not list local testing on its site or in its docs.

Miss Blue vs Linq: Features, Pricing and Differences

Feature comparison

Feature	Miss Blue	Linq
iMessage messaging
iMessage	Supported	Supported
Group chats	SupportedSend into an existing group by its chat_id and read group threads.	SupportedPro plan. Up to 31 recipients. No read or delivery receipts in groups.
Group management	SupportedCreate groups of 2 to 32 and add or remove members; leaving a group is not supported yet.	SupportedAdd and remove participants and leave a group, iMessage groups only, 3-member minimum.
Group name and photo	SupportedRename a group and set or remove its photo.	SupportedSet display_name and group_chat_icon on group chats.
Mentions	Not listed	SupportedGroup chats only. Notifies iMessage recipients even in a muted chat.
Tapbacks	SupportedAdd or remove the six tapbacks; tapbacks from customers appear on the message.	SupportedSix classic tapbacks or any emoji, send and receive via reaction webhooks.
Threaded replies	SupportedQuoted replies with reply_to_message_id.	Supportedreply_to with optional part_index. iMessage only.
Typing indicators	SupportedSend typing, optional auto-typing on inbound iMessage, and contact typing via webhook.	SupportedSend and receive, in direct and group chats. iMessage only.
Read receipts	SupportedExplicit read receipts by API; outbound messages report read.	SupportedMark chats read and receive message.read. One-to-one chats only.
Edit and unsend	PartialUnsend within Apple's 2-minute window. An edit endpoint is documented, but the FAQ says editing is not supported yet.	PartialEdit text up to 5 times within 15 minutes. Delete does not unsend from the recipient's device.
Message effects	Not supportedThe errors page says effects are not a supported API operation yet.	Supported11 screen and 4 bubble effects.
Animated text effects	Not supportedThe errors page says expressive text styles and effects are not supported yet.	Supportedtext_decorations animations: big, small, shake, nod, explode, ripple, bloom, jitter.
Stickers	Not listed	SupportedPeel emoji or images onto messages, send stickers, or place them inline in text.
Formatted text	Not listed	SupportedBold, italic, underline and strikethrough ranges, plus animated text. iMessage only.
Attachments	SupportedImages, video, PDFs, Office files and more up to 100 MiB, one per send, or carousels of 2 to 20 images.	SupportedUp to 10MB by URL, 100MB with pre-upload.
Live Photos	Not listed	Not listed
Rich link previews	Not listed	Supportedlink parts render as rich previews on iMessage and RCS.
Voice messages	SupportedAudio-only sends use the native voice-note bubble by default.	SupportedDedicated voice memo endpoint renders the native iMessage voice bubble.
Contact cards	Not listed	SupportedSend .vcf files as media parts.
Polls	Not listed	SupportedCreate, add options, vote and read tallies, with poll webhooks. Not as a chat's first message.
Chat backgrounds	Not listed	SupportedColor, animated or photo backgrounds, in direct and group chats.
Location sharing	SupportedSend Find My requests, read the sharing state and watch live fixes over Server-Sent Events.	SupportedRequest, read and stop Find My shares. Live location is a $79/mo add-on on Pro.
iMessage apps	Not listed	SupportedPro plan. Cards from your own Messages extension, or Linq-hosted cards (Experiences).
Live app cards	Not listed	SupportedUpdate App Card replaces a delivered iMessage app or Experience card in place.
Sender name and photo	SupportedSet and verify the number's Name and Photo Sharing profile by API.	SupportedContact card API sets name and photo, shared per chat via Name and Photo Sharing.
FaceTime calls	PartialFaceTime Audio only, as a $250/month add-on per line.	Not supportedDocs say the API does not place or answer calls.
Delivery status	Supportedpending, sent, delivered, read and failed with a reason, by webhook or per-message callback.	Supportedsent, delivered, read and failed webhooks. Groups report sent only.
iMessage availability check	SupportedLive iMessage and FaceTime registration lookup; a separate lookup reads your own past traffic.	Supportedcheck_imessage and check_rcs endpoints.
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).	SupportedPaid lines are dedicated. Provisioned by Linq, no self-serve number API.
Shared numbers	SupportedShared-pool numbers are offered as a separate, labelled option.	SupportedFree Hobby tier uses a Shared Line, inbound-first, 20 contacts.
Bring your own number	SupportedTransfer an existing number in; staff complete it in about 1 to 2 weeks.	Not listed
Line pooling	SupportedAuto round robin spreads new contacts across a project's dedicated numbers, then keeps each on one.	SupportedManaged load balancing (Pro): send without from and Linq picks and fails over lines.
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.	SupportedOrder is iMessage, then RCS, then SMS.
Outbound-first messaging	SupportedNew contacts are paced: 50 per number per day by default and 150 messages a day in total.	SupportedFree Hobby tier is inbound-first. Docs recommend inbound-first flows to avoid flagging.
Calls on the iMessage number	SupportedFaceTime Audio and phone calls from the number customers already message.	PartialAPI forwards inbound calls on the line; outbound needs caller-ID masking via another provider.
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.	Supported
WhatsApp	Not supportedNot offered	BetaSeparate WhatsApp API in beta. Access by request, no SLA.
Telegram	Not supported	Not supportedNot offered
Slack	Not supportedNot offered as a channel; the Slack page is an integration guide.	Not supported
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 handles.
Phone calls	PartialBrowser phone calls as a $75/month add-on; API keys cannot place regular phone calls.	PartialAPI does not place or answer calls; it forwards inbound calls. Calling lives in the Linq Blue app.
Apple Messages for Business	Not supportedNot offered	Not listedAI context page mentions it, but no product page or docs were found.
Unified channel API	SupportediMessage with RCS and SMS fallback, groups and calls share one API and webhook stream.	PartialiMessage, RCS and SMS share one API. WhatsApp is a separate API with its own keys and SDKs.
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.	Supported@linqapp/sdk
Python SDK	Not listed	Supportedlinq-python
Other SDKs	Not listed	SupportedOfficial Go SDK.
CLI	Supportedmb, with installers for macOS, Linux and Windows.	Supported@linqapp/cli: signup, sending, and a local webhook listener.
Webhooks	Supported	Supported
Signed webhooks	SupportedHex HMAC-SHA256 over timestamp and raw body; per-message callbacks are unsigned.	SupportedHMAC-SHA256, Standard Webhooks format, with replay protection.
MCP server	Supportedmb mcp serves the CLI commands as MCP tools for Claude Code, Codex, Cursor and others.	Supported@linqapp/sdk-mcp with docs search and code execution tools.
Open source	Not supportedThe CLI repo holds builds and installers without a license; the service is closed.	PartialSDKs, CLI and adapters are Apache-2.0 or MIT on GitHub. The messaging platform is closed.
Self-hosting	Not listed	Not supportedLinq describes itself as fully managed, in contrast to self-hosted options.
Local testing	Supportedmb_sandbox_ keys simulate outcomes and signed webhooks on a virtual number, with no phone.	Not listedThe CLI streams webhooks locally, but tests still use a real phone.
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.	PartialRetries for 30 minutes; after that, re-fetch chats or ask Linq for a manual replay.
OpenTelemetry	Not listed	PartialW3C trace IDs on every response and webhook for OTel backends. No export of Linq spans by default.
No-code integrations	BetaGoHighLevel connector is in beta; the Zapier, Make and n8n pages are setup guides.	SupportedLinq Blue works as a GoHighLevel messaging provider. No n8n, Make or Zapier found for the API.
CRM integrations	BetaGoHighLevel connector in beta; HubSpot and Salesforce pages describe API builds set up in onboarding.	SupportedVia Linq Blue: GoHighLevel, HubSpot and Salesforce.
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 and OpenClaw and Hermes plugins.
Agent framework integrations	PartialGuide pages for Vercel AI SDK, Chat SDK, LangChain and Claude Agent SDK; no adapter package found.	SupportedLinq-maintained Vercel Chat SDK adapter, plus OpenClaw and Hermes Agent plugins.
Streaming replies	Not listed	Not supportedDocs say the Chat SDK adapter buffers streams into one final message.
Agent group chats	Not listed	Not listed
Human handoff	SupportedShared Message Center for human takeover, with internal notes and resolving.	Not listed
Audit logs	Not listed	SupportedDashboard Activity page plus account-change webhooks with actor and origin.
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.	SupportedHobby: $0, up to 20 contacts, through the CLI.
Public pricing	Supported	SupportedPro from $260/mo. Enterprise is custom.
No per-message fees	Supported	Supported
Uptime SLA	PartialEnterprise only: contracted service terms; no uptime figure published.	SupportedContractual SLAs on the Enterprise plan; marketing cites 99.95%
Isolated infrastructure	SupportedDedicated numbers run on hardware assigned to you; Enterprise adds dedicated equipment.	SupportedDedicated lines across 4 data centers on paid plans; Hobby uses a shared line
SOC 2 Type II	Not listed	SupportedType I and Type II, reports for 2022, 2024, 2025 and 2026.
GDPR	Not listed	SupportedDPA covers GDPR and UK GDPR, with Standard Contractual Clauses.

Feature

Miss Blue

Linq

iMessage messaging

iMessage

Group chats

Send into an existing group by its chat_id and read group threads.

Pro plan. Up to 31 recipients. No read or delivery receipts in groups.

Group management

Create groups of 2 to 32 and add or remove members; leaving a group is not supported yet.

Add and remove participants and leave a group, iMessage groups only, 3-member minimum.

Group name and photo

Rename a group and set or remove its photo.

Set display_name and group_chat_icon on group chats.

Mentions

Not listed

Group chats only. Notifies iMessage recipients even in a muted chat.

Tapbacks

Add or remove the six tapbacks; tapbacks from customers appear on the message.

Six classic tapbacks or any emoji, send and receive via reaction webhooks.

Threaded replies

Quoted replies with reply_to_message_id.

reply_to with optional part_index. iMessage only.

Typing indicators

Send typing, optional auto-typing on inbound iMessage, and contact typing via webhook.

Send and receive, in direct and group chats. iMessage only.

Read receipts

Explicit read receipts by API; outbound messages report read.

Mark chats read and receive message.read. One-to-one chats only.

Edit and unsend

PartialUnsend within Apple's 2-minute window. An edit endpoint is documented, but the FAQ says editing is not supported yet.

PartialEdit text up to 5 times within 15 minutes. Delete does not unsend from the recipient's device.

Message effects

Not supportedThe errors page says effects are not a supported API operation yet.

11 screen and 4 bubble effects.

Animated text effects

Not supportedThe errors page says expressive text styles and effects are not supported yet.

text_decorations animations: big, small, shake, nod, explode, ripple, bloom, jitter.

Stickers

Not listed

Peel emoji or images onto messages, send stickers, or place them inline in text.

Formatted text

Not listed

Bold, italic, underline and strikethrough ranges, plus animated text. iMessage only.

Attachments

Images, video, PDFs, Office files and more up to 100 MiB, one per send, or carousels of 2 to 20 images.

Up to 10MB by URL, 100MB with pre-upload.

Live Photos

Not listed

Rich link previews

Not listed

link parts render as rich previews on iMessage and RCS.

Voice messages

Audio-only sends use the native voice-note bubble by default.

Dedicated voice memo endpoint renders the native iMessage voice bubble.

Contact cards

Not listed

Send .vcf files as media parts.

Polls

Not listed

Create, add options, vote and read tallies, with poll webhooks. Not as a chat's first message.

Chat backgrounds

Not listed

Color, animated or photo backgrounds, in direct and group chats.

Location sharing

Send Find My requests, read the sharing state and watch live fixes over Server-Sent Events.

Request, read and stop Find My shares. Live location is a $79/mo add-on on Pro.

iMessage apps

Not listed

Pro plan. Cards from your own Messages extension, or Linq-hosted cards (Experiences).

Live app cards

Not listed

Update App Card replaces a delivered iMessage app or Experience card in place.

Sender name and photo

Set and verify the number's Name and Photo Sharing profile by API.

Contact card API sets name and photo, shared per chat via Name and Photo Sharing.

FaceTime calls

PartialFaceTime Audio only, as a $250/month add-on per line.

Not supportedDocs say the API does not place or answer calls.

Delivery status

pending, sent, delivered, read and failed with a reason, by webhook or per-message callback.

sent, delivered, read and failed webhooks. Groups report sent only.

iMessage availability check

Live iMessage and FaceTime registration lookup; a separate lookup reads your own past traffic.

check_imessage and check_rcs endpoints.

Focus and Notify Anyway

Not listed

Numbers and delivery

Managed lines

Each number runs on a Mac that Miss Blue operates; staff provision numbers within about 48 to 72 hours.

Dedicated numbers

$99/month per number at the launch price (normally $198).

Paid lines are dedicated. Provisioned by Linq, no self-serve number API.

Shared numbers

Shared-pool numbers are offered as a separate, labelled option.

Free Hobby tier uses a Shared Line, inbound-first, 20 contacts.

Bring your own number

Transfer an existing number in; staff complete it in about 1 to 2 weeks.

Not listed

Line pooling

Auto round robin spreads new contacts across a project's dedicated numbers, then keeps each on one.

Managed load balancing (Pro): send without from and Linq picks and fails over lines.

SMS fallback

Falls back to RCS, or to SMS where RCS is unavailable, from the same number.

RCS fallback

Falls back to RCS where the carrier and recipient support it.

Order is iMessage, then RCS, then SMS.

Outbound-first messaging

New contacts are paced: 50 per number per day by default and 150 messages a day in total.

Free Hobby tier is inbound-first. Docs recommend inbound-first flows to avoid flagging.

Calls on the iMessage number

FaceTime Audio and phone calls from the number customers already message.

PartialAPI forwards inbound calls on the line; outbound needs caller-ID masking via another provider.

Other channels

SMS

As fallback from the iMessage number; the docs also describe Twilio SMS lines.

RCS

As fallback when the carrier and recipient support it.

Not supportedNot offered

BetaSeparate WhatsApp API in beta. Access by request, no SLA.

Not supported

Not supportedNot offered

Slack

Not supportedNot offered as a channel; the Slack page is an integration guide.

Not supported

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 handles.

Phone calls

PartialBrowser phone calls as a $75/month add-on; API keys cannot place regular phone calls.

PartialAPI does not place or answer calls; it forwards inbound calls. Calling lives in the Linq Blue app.

Apple Messages for Business

Not supportedNot offered

Not listedAI context page mentions it, but no product page or docs were found.

Unified channel API

iMessage with RCS and SMS fallback, groups and calls share one API and webhook stream.

PartialiMessage, RCS and SMS share one API. WhatsApp is a separate API with its own keys and SDKs.

Developer tools

REST API

113 endpoints across 13 resources, with an OpenAPI file.

TypeScript SDK

Not listedThe API is plain HTTP; no SDK package was found.

@linqapp/sdk

Python SDK

Not listed

linq-python

Other SDKs

Not listed

Official Go SDK.

CLI

mb, with installers for macOS, Linux and Windows.

@linqapp/cli: signup, sending, and a local webhook listener.

Webhooks

Signed webhooks

Hex HMAC-SHA256 over timestamp and raw body; per-message callbacks are unsigned.

HMAC-SHA256, Standard Webhooks format, with replay protection.

MCP server

mb mcp serves the CLI commands as MCP tools for Claude Code, Codex, Cursor and others.

@linqapp/sdk-mcp with docs search and code execution tools.

Open source

Not supportedThe CLI repo holds builds and installers without a license; the service is closed.

PartialSDKs, CLI and adapters are Apache-2.0 or MIT on GitHub. The messaging platform is closed.

Self-hosting

Not listed

Not supportedLinq describes itself as fully managed, in contrast to self-hosted options.

Local testing

mb_sandbox_ keys simulate outcomes and signed webhooks on a virtual number, with no phone.

Not listedThe CLI streams webhooks locally, but tests still use a real phone.

Custom channel providers

Not listed

Event replay

PartialPer-endpoint delivery log and history sync; docs say to poll GET /v1/messages to repair missed events.

PartialRetries for 30 minutes; after that, re-fetch chats or ask Linq for a manual replay.

OpenTelemetry

Not listed

PartialW3C trace IDs on every response and webhook for OTel backends. No export of Linq spans by default.

No-code integrations

BetaGoHighLevel connector is in beta; the Zapier, Make and n8n pages are setup guides.

Linq Blue works as a GoHighLevel messaging provider. No n8n, Make or Zapier found for the API.

CRM integrations

BetaGoHighLevel connector in beta; HubSpot and Salesforce pages describe API builds set up in onboarding.

Via Linq Blue: GoHighLevel, HubSpot and Salesforce.

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 and OpenClaw and Hermes plugins.

Agent framework integrations

PartialGuide pages for Vercel AI SDK, Chat SDK, LangChain and Claude Agent SDK; no adapter package found.

Linq-maintained Vercel Chat SDK adapter, plus OpenClaw and Hermes Agent plugins.

Streaming replies

Not listed

Not supportedDocs say the Chat SDK adapter buffers streams into one final message.

Agent group chats

Not listed

Human handoff

Shared Message Center for human takeover, with internal notes and resolving.

Not listed

Audit logs

Not listed

Dashboard Activity page plus account-change webhooks with actor and origin.

Message history API

Thread history by API and a conversation sync from the line's Mac.

Plans and compliance

Free plan

Free sandbox with simulated sends, plus a 30-minute live demo line by texting DEMO.

Hobby: $0, up to 20 contacts, through the CLI.

Public pricing

Pro from $260/mo. Enterprise is custom.

No per-message fees

Uptime SLA

PartialEnterprise only: contracted service terms; no uptime figure published.

Contractual SLAs on the Enterprise plan; marketing cites 99.95%

Isolated infrastructure

Dedicated numbers run on hardware assigned to you; Enterprise adds dedicated equipment.

Dedicated lines across 4 data centers on paid plans; Hobby uses a shared line

SOC 2 Type II

Not listed

Type I and Type II, reports for 2022, 2024, 2025 and 2026.

GDPR

Not listed

DPA covers GDPR and UK GDPR, with Standard Contractual Clauses.

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

Miss Blue vs Linq

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

Miss Blue

Linq

Where Miss Blue is ahead

Where Linq is ahead

Feature comparison

Pricing

Miss Blue

Linq

Which should you choose?

Frequently asked questions

More Miss Blue comparisons

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