What is the difference between Comms by Osis and Miss Blue?

Comms by Osis supports 43 of the 77 features compared here, and Miss Blue supports 47. Comms by Osis adds contact cards, polls, chat backgrounds and WhatsApp. Miss Blue adds voice messages, line pooling, CLI, local testing and CRM integrations.

Does Miss Blue support contact cards?

Miss Blue does not list contact cards on its site or in its docs.

Does Miss Blue support polls?

Miss Blue does not list polls on its site or in its docs.

Does Miss Blue support chat backgrounds?

Miss Blue does not list chat backgrounds on its site or in its docs.

Comms by Osis vs Miss Blue

Q: How much do Comms by Osis and Miss Blue cost?

Comms by Osis: Free on a shared line with 100 messages a day, Plus at $50 a month on a shared line, Dedicated at $200 a month per number with $0 setup, and custom Enterprise; AI usage is billed separately. 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.

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

Comms by Osis

iMessage, RCS, SMS and WhatsApp API with hosted agents

Starting price: $50/month (shared line); $200/month per dedicated number
Free plan: Free: shared platform line, 100 messages a day, no card

Visit Comms by Osis Read more

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 Blue Read more

Comms by Osis supports 43 of the 77 features compared here, and Miss Blue supports 47.

Where Comms by Osis is ahead

Where Miss Blue is ahead

Feature comparison

Feature	Comms by Osis	Miss Blue
iMessage messaging
iMessage	Supported	Supported
Group chats	SupportedGroups of 2 to 31 people from a dedicated line with group support. Not on the shared line.	SupportedSend into an existing group by its chat_id and read group threads.
Group management	PartialCreate a group with its first message; adding or removing members is not documented.	SupportedCreate groups of 2 to 32 and add or remove members; leaving a group is not supported yet.
Group name and photo	PartialName a group when you create it; group photos and renames are not documented.	SupportedRename a group and set or remove its photo.
Mentions	Not listed	Not listed
Tapbacks	SupportedClassic tapbacks or custom emoji, add, replace or remove; reaction webhooks for inbound.	SupportedAdd or remove the six tapbacks; tapbacks from customers appear on the message.
Threaded replies	Supportedreply_to_message_id replies inside an iMessage thread; text only.	SupportedQuoted replies with reply_to_message_id.
Typing indicators	SupportedShow or hide typing dots on iMessage, RCS and WhatsApp.	SupportedSend typing, optional auto-typing on inbound iMessage, and contact typing via webhook.
Read receipts	SupportedMark a conversation read to send a receipt; comms.message.read for one-to-one chats.	SupportedExplicit read receipts by API; outbound messages report read.
Edit and unsend	PartialUnsend within Apple's 2-minute window on supported lines. No edit endpoint; inbound edits fire events.	PartialUnsend within Apple's 2-minute window. An edit endpoint is documented, but the FAQ says editing is not supported yet.
Message effects	Not listed	Not supportedThe errors page says effects are not a supported API operation yet.
Animated text effects	Not listed	Not supportedThe errors page says expressive text styles and effects are not supported yet.
Stickers	Not listed	Not listed
Formatted text	Not listed	Not listed
Attachments	SupportedUp to 32 files and 9 MiB per message, sent as base64.	SupportedImages, video, PDFs, Office files and more up to 100 MiB, one per send, or carousels of 2 to 20 images.
Live Photos	Not listed	Not listed
Rich link previews	Not listed	Not listed
Voice messages	Not listedVoice notes are documented for WhatsApp only.	SupportedAudio-only sends use the native voice-note bubble by default.
Contact cards	SupportedSend a vCard over iMessage, SMS or WhatsApp.	Not listed
Polls	Supported2 to 12 options; votes arrive as comms.poll.voted. Tap to vote on iOS 26 and later.	Not listed
Chat backgrounds	BetaExperimental: photo or gradient backgrounds on lines that support them.	Not listed
Location sharing	PartialRead locations that contacts choose to share, with update webhooks; the API cannot request a share.	SupportedSend Find My requests, read the sharing state and watch live fixes over Server-Sent Events.
iMessage apps	Not listed	Not listed
Live app cards	Not listed	Not listed
Sender name and photo	SupportedContact card API sets name and photo, with native name and photo sharing on supported lines.	SupportedSet and verify the number's Name and Photo Sharing profile by API.
FaceTime calls	PartialAnswer inbound FaceTime audio and video calls by API and stream audio; outbound calls not documented.	PartialFaceTime Audio only, as a $250/month add-on per line.
Delivery status	Supportedsent, delivered and read events, plus a list of delivery attempts.	Supportedpending, sent, delivered, read and failed with a reason, by webhook or per-message callback.
iMessage availability check	SupportedChecks iMessage, RCS and WhatsApp for a phone number, or iMessage for an email.	SupportedLive iMessage and FaceTime registration lookup; a separate lookup reads your own past traffic.
Focus and Notify Anyway	Not listed	Not listed
Numbers and delivery
Managed lines	SupportedHosted lines; no Mac to run.	SupportedEach number runs on a Mac that Miss Blue operates; staff provision numbers within about 48 to 72 hours.
Dedicated numbers	SupportedDedicated plan: $200 a month per number.	Supported$99/month per number at the launch price (normally $198).
Shared numbers	SupportedFree and Plus plans run on a shared platform line.	SupportedShared-pool numbers are offered as a separate, labelled option.
Bring your own number	SupportedPort an existing number to a dedicated line; needs approval and a supported number.	SupportedTransfer an existing number in; staff complete it in about 1 to 2 weeks.
Line pooling	Not listed	SupportedAuto round robin spreads new contacts across a project's dedicated numbers, then keeps each on one.
SMS fallback	SupportedAuto routing falls back to SMS only after a clear rejection.	SupportedFalls back to RCS, or to SMS where RCS is unavailable, from the same number.
RCS fallback	PartialAuto routing tries RCS for plain text on supported dedicated lines with carrier enablement.	SupportedFalls back to RCS where the carrier and recipient support it.
Outbound-first messaging	SupportedDedicated lines can start conversations.	SupportedNew contacts are paced: 50 per number per day by default and 150 messages a day in total.
Calls on the iMessage number	PartialInbound phone and FaceTime calls to the line can be answered by API; outbound is not documented.	SupportedFaceTime Audio and phone calls from the number customers already message.
Other channels
SMS	SupportedChoose sms explicitly or let auto routing fall back to it.	SupportedAs fallback from the iMessage number; the docs also describe Twilio SMS lines.
RCS	PartialOne plain-text message to one number, on supported dedicated lines with carrier enablement.	SupportedAs fallback when the carrier and recipient support it.
WhatsApp	SupportedSends from the number's WhatsApp Business account when WhatsApp is turned on for it.	Not supportedNot offered
Telegram	Not supportedNot offered	Not supported
Slack	Not supported	Not supportedNot offered as a channel; the Slack page is an integration guide.
Email	Not supportedNot offered as a channel; the capability check accepts Apple ID emails for iMessage.	Not supportedNot offered as a channel; iMessage can be sent to Apple ID email addresses.
Phone calls	PartialInbound cellular calls can be answered by API, but audio relay works only for FaceTime for now.	PartialBrowser phone calls as a $75/month add-on; API keys cannot place regular phone calls.
Apple Messages for Business	Not supportedNot offered; the site says Comms is distinct from Apple Messages for Business.	Not supportedNot offered
Unified channel API	SupportedOne send endpoint and message model for iMessage, RCS, WhatsApp and SMS.	SupportediMessage with RCS and SMS fallback, groups and calls share one API and webhook stream.
Developer tools
REST API	Supported	Supported113 endpoints across 13 resources, with an OpenAPI file.
TypeScript SDK	Not listedOnly a runnable Node.js example is published.	Not listedThe API is plain HTTP; no SDK package was found.
Python SDK	Not listed	Not listed
Other SDKs	Not listed	Not listed
CLI	Not listed	Supportedmb, with installers for macOS, Linux and Windows.
Webhooks	Supported	Supported
Signed webhooks	SupportedHMAC-SHA256 in X-Osis-Signature.	SupportedHex HMAC-SHA256 over timestamp and raw body; per-message callbacks are unsigned.
MCP server	SupportedHosted MCP server with OAuth or a scoped API key.	Supportedmb mcp serves the CLI commands as MCP tools for Claude Code, Codex, Cursor and others.
Open source	Not listed	Not supportedThe CLI repo holds builds and installers without a license; the service is closed.
Self-hosting	Not listed	Not listed
Local testing	Not listed	Supportedmb_sandbox_ keys simulate outcomes and signed webhooks on a virtual number, with no phone.
Custom channel providers	Not listed	Not listed
Event replay	PartialUp to six delivery retries and a delivery attempts list; no replay endpoint is documented.	PartialPer-endpoint delivery log and history sync; docs say to poll GET /v1/messages to repair missed events.
OpenTelemetry	Not listed	Not listed
No-code integrations	BetaHighLevel connector is a development preview; Marketplace approval is pending.	BetaGoHighLevel connector is in beta; the Zapier, Make and n8n pages are setup guides.
CRM integrations	Not listed	BetaGoHighLevel connector in beta; HubSpot and Salesforce pages describe API builds set up in onboarding.
Built for AI agents
Agent framework	SupportedHosted agents with instructions, knowledge, handoff and MCP tool connections.	PartialNo agent SDK; offers a managed conversational AI add-on and multi-step automations.
Agent framework integrations	Not listed	PartialGuide pages for Vercel AI SDK, Chat SDK, LangChain and Claude Agent SDK; no adapter package found.
Streaming replies	Not listed	Not listed
Agent group chats	Not listed	Not listed
Human handoff	SupportedHandoff controls pause the hosted agent while a person replies in the team inbox.	SupportedShared Message Center for human takeover, with internal notes and resolving.
Audit logs	Not listed	Not listed
Message history API	SupportedList messages and conversations on your lines.	SupportedThread history by API and a conversation sync from the line's Mac.
Plans and compliance
Free plan	SupportedFree: shared platform line, 100 messages a day, no card.	SupportedFree sandbox with simulated sends, plus a 30-minute live demo line by texting DEMO.
Public pricing	Supported	Supported
No per-message fees	SupportedFlat plans; AI usage and answered call minutes are billed separately.	Supported
Uptime SLA	Not listed	PartialEnterprise only: contracted service terms; no uptime figure published.
Isolated infrastructure	Not listed	SupportedDedicated numbers run on hardware assigned to you; Enterprise adds dedicated equipment.
SOC 2 Type II	Not listed	Not listed
GDPR	Not listedThe privacy policy mentions GDPR rights; no DPA was found.	Not listed

Feature

Comms by Osis

Miss Blue

iMessage messaging

iMessage

Group chats

Groups of 2 to 31 people from a dedicated line with group support. Not on the shared line.

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

Group management

PartialCreate a group with its first message; adding or removing members is not documented.

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

Group name and photo

PartialName a group when you create it; group photos and renames are not documented.

Rename a group and set or remove its photo.

Mentions

Not listed

Tapbacks

Classic tapbacks or custom emoji, add, replace or remove; reaction webhooks for inbound.

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

Threaded replies

reply_to_message_id replies inside an iMessage thread; text only.

Quoted replies with reply_to_message_id.

Typing indicators

Show or hide typing dots on iMessage, RCS and WhatsApp.

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

Read receipts

Mark a conversation read to send a receipt; comms.message.read for one-to-one chats.

Explicit read receipts by API; outbound messages report read.

Edit and unsend

PartialUnsend within Apple's 2-minute window on supported lines. No edit endpoint; inbound edits fire events.

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

Message effects

Not listed

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

Animated text effects

Not listed

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

Stickers

Not listed

Formatted text

Not listed

Attachments

Up to 32 files and 9 MiB per message, sent as base64.

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

Live Photos

Not listed

Rich link previews

Not listed

Voice messages

Not listedVoice notes are documented for WhatsApp only.

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

Contact cards

Send a vCard over iMessage, SMS or WhatsApp.

Not listed

Polls

2 to 12 options; votes arrive as comms.poll.voted. Tap to vote on iOS 26 and later.

Not listed

Chat backgrounds

BetaExperimental: photo or gradient backgrounds on lines that support them.

Not listed

Location sharing

PartialRead locations that contacts choose to share, with update webhooks; the API cannot request a share.

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

iMessage apps

Not listed

Live app cards

Not listed

Sender name and photo

Contact card API sets name and photo, with native name and photo sharing on supported lines.

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

FaceTime calls

PartialAnswer inbound FaceTime audio and video calls by API and stream audio; outbound calls not documented.

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

Delivery status

sent, delivered and read events, plus a list of delivery attempts.

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

iMessage availability check

Checks iMessage, RCS and WhatsApp for a phone number, or iMessage for an email.

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

Focus and Notify Anyway

Not listed

Numbers and delivery

Managed lines

Hosted lines; no Mac to run.

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

Dedicated numbers

Dedicated plan: $200 a month per number.

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

Shared numbers

Free and Plus plans run on a shared platform line.

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

Bring your own number

Port an existing number to a dedicated line; needs approval and a supported number.

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

Line pooling

Not listed

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

SMS fallback

Auto routing falls back to SMS only after a clear rejection.

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

RCS fallback

PartialAuto routing tries RCS for plain text on supported dedicated lines with carrier enablement.

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

Outbound-first messaging

Dedicated lines can start conversations.

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

Calls on the iMessage number

PartialInbound phone and FaceTime calls to the line can be answered by API; outbound is not documented.

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

Other channels

SMS

Choose sms explicitly or let auto routing fall back to it.

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

RCS

PartialOne plain-text message to one number, on supported dedicated lines with carrier enablement.

As fallback when the carrier and recipient support it.

Sends from the number's WhatsApp Business account when WhatsApp is turned on for it.

Not supportedNot offered

Not supported

Slack

Not supported

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

Not supportedNot offered as a channel; the capability check accepts Apple ID emails for iMessage.

Not supportedNot offered as a channel; iMessage can be sent to Apple ID email addresses.

Phone calls

PartialInbound cellular calls can be answered by API, but audio relay works only for FaceTime for now.

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

Apple Messages for Business

Not supportedNot offered; the site says Comms is distinct from Apple Messages for Business.

Not supportedNot offered

Unified channel API

One send endpoint and message model for iMessage, RCS, WhatsApp and SMS.

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

Developer tools

REST API

113 endpoints across 13 resources, with an OpenAPI file.

TypeScript SDK

Not listedOnly a runnable Node.js example is published.

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

Python SDK

Not listed

Other SDKs

Not listed

CLI

Not listed

mb, with installers for macOS, Linux and Windows.

Webhooks

Signed webhooks

HMAC-SHA256 in X-Osis-Signature.

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

MCP server

Hosted MCP server with OAuth or a scoped API key.

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

Open source

Not listed

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

Self-hosting

Not listed

Local testing

Not listed

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

Custom channel providers

Not listed

Event replay

PartialUp to six delivery retries and a delivery attempts list; no replay endpoint is documented.

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

OpenTelemetry

Not listed

No-code integrations

BetaHighLevel connector is a development preview; Marketplace approval is pending.

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

CRM integrations

Not listed

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

Built for AI agents

Agent framework

Hosted agents with instructions, knowledge, handoff and MCP tool connections.

PartialNo agent SDK; offers a managed conversational AI add-on and multi-step automations.

Agent framework integrations

Not listed

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

Streaming replies

Not listed

Agent group chats

Not listed

Human handoff

Handoff controls pause the hosted agent while a person replies in the team inbox.

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

Audit logs

Not listed

Message history API

List messages and conversations on your lines.

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

Plans and compliance

Free plan

Free: shared platform line, 100 messages a day, no card.

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

Public pricing

No per-message fees

Flat plans; AI usage and answered call minutes are billed separately.

Uptime SLA

Not listed

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

Isolated infrastructure

Not listed

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

SOC 2 Type II

Not listed

GDPR

Not listedThe privacy policy mentions GDPR rights; no DPA was found.

Not listed

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

Pricing

Comms by Osis

Free on a shared line with 100 messages a day, Plus at $50 a month on a shared line, Dedicated at $200 a month per number with $0 setup, and custom Enterprise; AI usage is billed separately.

Pricing model: flat monthly per plan or dedicated line; AI usage and call minutes extra

Source

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