What is the difference between Comms by Osis and MessageBlue?

Comms by Osis supports 43 of the 77 features compared here, and MessageBlue supports 38. Comms by Osis adds group name and photo, threaded replies, edit and unsend, contact cards and polls. MessageBlue adds voice messages, line pooling, TypeScript SDK, self-hosting and local testing.

How much do Comms by Osis and MessageBlue 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. MessageBlue: Free when you bring your own number on your own Mac; a dedicated line is $100 a month on Startups & SMB, and Business and Enterprise are contact sales.

Does MessageBlue support group name and photo?

MessageBlue does not list group name and photo on its site or in its docs.

Does MessageBlue support threaded replies?

MessageBlue does not list threaded replies on its site or in its docs.

Does MessageBlue support edit and unsend?

MessageBlue does not list edit and unsend on its site or in its docs.

Comms by Osis vs MessageBlue

Compare Comms by Osis and MessageBlue 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

MessageBlue

iMessage API for agents, with bring-your-own-number

Starting price: $100/month per line
Free plan: $0 with your own number and Mac, all features, limited seats

Visit MessageBlue Read more

Comms by Osis supports 43 of the 77 features compared here, and MessageBlue supports 38.

Where Comms by Osis is ahead

and 7 more in the table below.

Where MessageBlue is ahead

and 2 more in the table below.

Feature comparison

Feature	Comms by Osis	MessageBlue
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 text, attachments and voice notes to groups; receive group messages.
Group management	PartialCreate a group with its first message; adding or removing members is not documented.	PartialCreate groups of 2 to 31 by API; no add or remove participant endpoints.
Group name and photo	PartialName a group when you create it; group photos and renames are not documented.	Not listed
Mentions	Not listed	Not listed
Tapbacks	SupportedClassic tapbacks or custom emoji, add, replace or remove; reaction webhooks for inbound.	SupportedSend or remove emoji or tapbacks; inbound tapbacks arrive by webhook.
Threaded replies	Supportedreply_to_message_id replies inside an iMessage thread; text only.	Not listed
Typing indicators	SupportedShow or hide typing dots on iMessage, RCS and WhatsApp.	SupportedSend and stop, up to 20 seconds; no inbound typing webhook documented.
Read receipts	SupportedMark a conversation read to send a receipt; comms.message.read for one-to-one chats.	SupportedSend read receipts; outbound messages report a read status.
Edit and unsend	PartialUnsend within Apple's 2-minute window on supported lines. No edit endpoint; inbound edits fire events.	Not listed
Message effects	Not listed	Not listed
Animated text effects	Not listed	Not listed
Stickers	Not listed	Not listed
Formatted text	Not listed	Not listed
Attachments	SupportedUp to 32 files and 9 MiB per message, sent as base64.	SupportedAttachments by public URL.
Live Photos	Not listed	Not listed
Rich link previews	Not listed	Not listed
Voice messages	Not listedVoice notes are documented for WhatsApp only.	SupportedTo individuals and groups.
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.	Not listed
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.	Not listed
FaceTime calls	PartialAnswer inbound FaceTime audio and video calls by API and stream audio; outbound calls not documented.	Not listedInbox video call button is marked coming soon; voice calls need the team to enable.
Delivery status	Supportedsent, delivered and read events, plus a list of delivery attempts.	Supportedsent, delivered, read, SMS_FALLBACK and failed via status webhook.
iMessage availability check	SupportedChecks iMessage, RCS and WhatsApp for a phone number, or iMessage for an email.	SupportedCheck a number, or a whole group's participants, before sending.
Focus and Notify Anyway	Not listed	Not listed
Numbers and delivery
Managed lines	SupportedHosted lines; no Mac to run.	SupportedRequest a number and the team provisions it, typically in 3 to 5 business days.
Dedicated numbers	SupportedDedicated plan: $200 a month per number.	Supported$100/mo per line on Startups & SMB.
Shared numbers	SupportedFree and Plus plans run on a shared platform line.	Not listed
Bring your own number	SupportedPort an existing number to a dedicated line; needs approval and a supported number.	SupportedPair your own Mac and its Apple ID number with the MessageBlue agent.
Line pooling	Not listed	SupportedAssigns the least-mapped number per contact and remaps contacts if a number is blocked.
SMS fallback	SupportedAuto routing falls back to SMS only after a clear rejection.	SupportedStatus event reports SMS_FALLBACK; not available for group creation.
RCS fallback	PartialAuto routing tries RCS for plain text on supported dedicated lines with carrier enablement.	Not listedMarketing pages say SMS or RCS fallback; docs only describe SMS.
Outbound-first messaging	SupportedDedicated lines can start conversations.	SupportedStart chats with any iMessage-capable number; warns after 5 unanswered messages.
Calls on the iMessage number	PartialInbound phone and FaceTime calls to the line can be answered by API; outbound is not documented.	Not listedInbox voice call button says to contact the team; number used is not stated.
Other channels
SMS	SupportedChoose sms explicitly or let auto routing fall back to it.	PartialOnly as fallback; new chats need an iMessage-capable recipient.
RCS	PartialOne plain-text message to one number, on supported dedicated lines with carrier enablement.	Not listedMentioned only as a fallback on marketing pages.
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 supported
Email	Not supportedNot offered as a channel; the capability check accepts Apple ID emails for iMessage.	Not supported
Phone calls	PartialInbound cellular calls can be answered by API, but audio relay works only for FaceTime for now.	Not listedInbox voice call button says to contact the team; call type and number not stated.
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.	PartialOne API for iMessage and its SMS fallback only.
Developer tools
REST API	Supported	SupportedOpenAPI 3.1 spec published.
TypeScript SDK	Not listedOnly a runnable Node.js example is published.	Supportednpm messageblue (0.0.7), generated from the OpenAPI spec.
Python SDK	Not listed	Not supportedDocs say only TypeScript is published today; other languages on request.
Other SDKs	Not listed	Not supported
CLI	Not listed	Not listedThe API page mentions a CLI, but none is documented.
Webhooks	Supported	SupportedInbound and status URLs with retries and dead-lettering.
Signed webhooks	SupportedHMAC-SHA256 in X-Osis-Signature.	SupportedX-MB-Signature: HMAC-SHA256 over timestamp and raw body.
MCP server	SupportedHosted MCP server with OAuth or a scoped API key.	PartialDocumentation-only MCP server at docs.messageblue.ai/_mcp/server.
Open source	Not listed	Not listed
Self-hosting	Not listed	SupportedEnterprise plan: your cloud (BYOC), VPC or on-prem
Local testing	Not listed	PartialBrowser test bench runs the no-code agent without sending an iMessage.
Custom channel providers	Not listed	Not listed
Event replay	PartialUp to six delivery retries and a delivery attempts list; no replay endpoint is documented.	SupportedFailed and dead-lettered deliveries are kept and can be replayed.
OpenTelemetry	Not listed	Not listed
No-code integrations	BetaHighLevel connector is a development preview; Marketplace approval is pending.	SupportedZapier, plus a no-code agent builder.
CRM integrations	Not listed	SupportedAgent connects to Salesforce, HubSpot and others; HubSpot inbox sync is private beta.
Built for AI agents
Agent framework	SupportedHosted agents with instructions, knowledge, handoff and MCP tool connections.	SupportedNo-code agent with model choice, prompt, knowledge, tools, memory and multi-step tasks.
Agent framework integrations	Not listed	Not listedSite says it works with LangChain and the Vercel AI SDK via webhooks; no official integration.
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.	SupportedTeam inbox for manual replies; pause the agent or block it per contact.
Audit logs	Not listed	SupportedOn the Business and Enterprise plans
Message history API	SupportedList messages and conversations on your lines.	SupportedConversation by phone number.
Plans and compliance
Free plan	SupportedFree: shared platform line, 100 messages a day, no card.	Supported$0 when you bring your own number on your own Mac; every feature included.
Public pricing	Supported	SupportedFree and $100/mo listed; Business and Enterprise are contact sales.
No per-message fees	SupportedFlat plans; AI usage and answered call minutes are billed separately.	SupportedFlat $100/mo per line.
Uptime SLA	Not listed	Supported99.9% SLA listed from the $100 plan; the API page says enterprise plans
Isolated infrastructure	Not listed	SupportedEnterprise plan: single-tenant or self-hosted stack
SOC 2 Type II	Not listed	PartialEnterprise page claims audited SOC 2 Type II; pricing says SOC 2 ready; no report found.
GDPR	Not listedThe privacy policy mentions GDPR rights; no DPA was found.	Not listed

Feature

Comms by Osis

MessageBlue

iMessage messaging

iMessage

Group chats

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

Send text, attachments and voice notes to groups; receive group messages.

Group management

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

PartialCreate groups of 2 to 31 by API; no add or remove participant endpoints.

Group name and photo

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

Not listed

Mentions

Not listed

Tapbacks

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

Send or remove emoji or tapbacks; inbound tapbacks arrive by webhook.

Threaded replies

reply_to_message_id replies inside an iMessage thread; text only.

Not listed

Typing indicators

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

Send and stop, up to 20 seconds; no inbound typing webhook documented.

Read receipts

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

Send read receipts; outbound messages report a read status.

Edit and unsend

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

Not listed

Message effects

Not listed

Animated text effects

Not listed

Stickers

Not listed

Formatted text

Not listed

Attachments

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

Attachments by public URL.

Live Photos

Not listed

Rich link previews

Not listed

Voice messages

Not listedVoice notes are documented for WhatsApp only.

To individuals and groups.

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.

Not listed

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.

Not listed

FaceTime calls

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

Not listedInbox video call button is marked coming soon; voice calls need the team to enable.

Delivery status

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

sent, delivered, read, SMS_FALLBACK and failed via status webhook.

iMessage availability check

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

Check a number, or a whole group's participants, before sending.

Focus and Notify Anyway

Not listed

Numbers and delivery

Managed lines

Hosted lines; no Mac to run.

Request a number and the team provisions it, typically in 3 to 5 business days.

Dedicated numbers

Dedicated plan: $200 a month per number.

$100/mo per line on Startups & SMB.

Shared numbers

Free and Plus plans run on a shared platform line.

Not listed

Bring your own number

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

Pair your own Mac and its Apple ID number with the MessageBlue agent.

Line pooling

Not listed

Assigns the least-mapped number per contact and remaps contacts if a number is blocked.

SMS fallback

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

Status event reports SMS_FALLBACK; not available for group creation.

RCS fallback

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

Not listedMarketing pages say SMS or RCS fallback; docs only describe SMS.

Outbound-first messaging

Dedicated lines can start conversations.

Start chats with any iMessage-capable number; warns after 5 unanswered messages.

Calls on the iMessage number

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

Not listedInbox voice call button says to contact the team; number used is not stated.

Other channels

SMS

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

PartialOnly as fallback; new chats need an iMessage-capable recipient.

RCS

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

Not listedMentioned only as a fallback on marketing pages.

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 capability check accepts Apple ID emails for iMessage.

Not supported

Phone calls

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

Not listedInbox voice call button says to contact the team; call type and number not stated.

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.

PartialOne API for iMessage and its SMS fallback only.

Developer tools

REST API

OpenAPI 3.1 spec published.

TypeScript SDK

Not listedOnly a runnable Node.js example is published.

npm messageblue (0.0.7), generated from the OpenAPI spec.

Python SDK

Not listed

Not supportedDocs say only TypeScript is published today; other languages on request.

Other SDKs

Not listed

Not supported

CLI

Not listed

Not listedThe API page mentions a CLI, but none is documented.

Webhooks

Inbound and status URLs with retries and dead-lettering.

Signed webhooks

HMAC-SHA256 in X-Osis-Signature.

X-MB-Signature: HMAC-SHA256 over timestamp and raw body.

MCP server

Hosted MCP server with OAuth or a scoped API key.

PartialDocumentation-only MCP server at docs.messageblue.ai/_mcp/server.

Open source

Not listed

Self-hosting

Not listed

Enterprise plan: your cloud (BYOC), VPC or on-prem

Local testing

Not listed

PartialBrowser test bench runs the no-code agent without sending an iMessage.

Custom channel providers

Not listed

Event replay

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

Failed and dead-lettered deliveries are kept and can be replayed.

OpenTelemetry

Not listed

No-code integrations

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

Zapier, plus a no-code agent builder.

CRM integrations

Not listed

Agent connects to Salesforce, HubSpot and others; HubSpot inbox sync is private beta.

Built for AI agents

Agent framework

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

No-code agent with model choice, prompt, knowledge, tools, memory and multi-step tasks.

Agent framework integrations

Not listed

Not listedSite says it works with LangChain and the Vercel AI SDK via webhooks; no official integration.

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.

Team inbox for manual replies; pause the agent or block it per contact.

Audit logs

Not listed

On the Business and Enterprise plans

Message history API

List messages and conversations on your lines.

Conversation by phone number.

Plans and compliance

Free plan

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

$0 when you bring your own number on your own Mac; every feature included.

Public pricing

Free and $100/mo listed; Business and Enterprise are contact sales.

No per-message fees

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

Flat $100/mo per line.

Uptime SLA

Not listed

99.9% SLA listed from the $100 plan; the API page says enterprise plans

Isolated infrastructure

Not listed

Enterprise plan: single-tenant or self-hosted stack

SOC 2 Type II

Not listed

PartialEnterprise page claims audited SOC 2 Type II; pricing says SOC 2 ready; no report found.

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

MessageBlue

Free when you bring your own number on your own Mac; a dedicated line is $100 a month on Startups & SMB, and Business and Enterprise are contact sales.

Pricing model: flat per line

Source