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Blooio vs Inkbox

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

Blooio

One API for iMessage, WhatsApp and Apple Messages
Starting price
$39/month (Starter, shared number)
Free plan
Free trial: 20 messages total on a shared number, no credit card
Visit BlooioRead more

Inkbox

Email, phone, iMessage and A2A identity for AI agents
Starting price
$25/month (Developer); $167/month for a dedicated iMessage number (Startup)
Free plan
Free: 3 identities, shared iMessage up to 2,000 messages a month and 3 recipients at a time
Visit InkboxRead more

Blooio supports 60 of the 77 features compared here, and Inkbox supports 45.

Where Blooio is ahead

and 11 more in the table below.

Where Inkbox is ahead

Feature comparison

FeatureBlooioInkbox
iMessage messaging
iMessage
Supported
SupportedShared router service on every plan, or a dedicated line from the Startup plan.
Group chats
Supported
SupportedDedicated lines only, 2 to 8 remote participants. Shared service is 1:1.
Group management
PartialCreate groups by API. Adding or removing members is marked coming soon (returns 501).
PartialCreate a group by sending to 2 to 8 numbers. No add or remove member API in V1.
Group name and photo
SupportedRename groups and set or remove group icons.
Not listed
Mentions
Not listedA guide index lists mentions, but no mention field is documented.
Not listed
Tapbacks
SupportedAdd or remove tapbacks on any message; inbound reactions arrive as message.reaction events.
SupportedSend, replace and remove 7 tapbacks including eyes; inbound tapbacks arrive by webhook.
Threaded replies
Supportedreply_to on sends.
Supportedreply_to_message_id in 1:1 and group chats, with thread reads. Falls back to a plain reply.
Typing indicators
SupportedSend, and receive typing.started and typing.stopped events.
PartialSend only, in 1:1 chats. Groups and inbound typing events are not supported.
Read receipts
SupportedMark chats read and receive message.read events.
PartialSend read receipts in 1:1 chats. No read status for your own sent messages is documented.
Edit and unsend
Not listed
Not listed
Message effects
Supportedeffect field on text sends.
Supported4 bubble and 9 full-screen send styles, in 1:1 and dedicated-line groups.
Animated text effects
Not listed
Not listed
Stickers
Not listed
Not listed
Formatted text
SupportedMarkdown bold, italic, underline and strikethrough sent as iMessage rich text.
Not listed
Attachments
Supported
SupportedOne media item per message, uploads up to 10 MiB. No media before the recipient's first reply.
Live Photos
Not listed
Not listed
Rich link previews
Supportedrich_link bubbles with image and title overrides.
Not listed
Voice messages
SupportedA single audio file is sent as a native voice memo.
Not listed
Contact cards
Not listedAttachments accept other files, but .vcf is not named. Name and Photo cards are documented.
PartialThe router sends the agent's contact card on connect. Sending other vCards is not documented.
Polls
SupportedSend, vote and read results, with poll webhooks.
Not listed
Chat backgrounds
SupportedImage backgrounds only.
Not listed
Location sharing
PartialReads Find My locations of contacts already sharing. Location access is provisioned on request.
Not listed
iMessage apps
SupportedCustom bubbles for your own iMessage app extension, sent and received.
Not listed
Live app cards
Not supportedDocs say a send cannot continue an app session; each bubble starts a new one.
Not listed
Sender name and photo
SupportedSet name and avatar per number and share the card into a chat.
SupportedDedicated lines share the identity's display name and avatar automatically.
FaceTime calls
PartialOn request for dedicated lines. Docs say the FaceTime API is disabled for now (returns 501).
Not listedCalls run over iMessage lines, but the docs do not say whether they are FaceTime.
Delivery status
Supported
Supportedimessage.sent, imessage.delivered and imessage.delivery_failed webhooks, per recipient in groups.
iMessage availability check
SupportedLive per-number iMessage, SMS and RCS capability lookup.
SupportedReturns iMessage, SMS or RCS for any E.164 number.
Focus and Notify Anyway
SupportedRead a contact's Focus status and send Notify Anyway. Direct chats only.
Not listed
Numbers and delivery
Managed lines
SupportedPre-warmed numbers claimed self-serve from the dashboard.
SupportedShared router lines and dedicated lines run by Inkbox. No Mac needed.
Dedicated numbers
Supported
SupportedStartup plan includes one dedicated iMessage number. VoIP numbers for calls and SMS from Developer.
Shared numbers
SupportedStarter and Commercial Shared use managed shared pools.
SupportedFree and paid plans include shared iMessage. The human must text the router first.
Bring your own number
PartialiMessage only by porting on dedicated plans. Your own Twilio number can carry SMS.
Not listed
Line pooling
SupportedNumber pools and channel priorities; a contact keeps one number in a pool.
BetaOrganization-owned shared iMessage pools, beta and by request only.
SMS fallback
Supported
SupportedInkbox tries iMessage first and can fall back to SMS; was_downgraded marks it.
RCS fallback
Supported
PartialDocs describe SMS fallback, and the service field can report rcs. The transport cannot be chosen.
Outbound-first messaging
SupportedShared plans cap new conversations per day. Inbound plan is reply-only.
PartialDedicated lines can start chats, up to 40 new recipients a day. Shared service needs the human to text first.
Calls on the iMessage number
SupportedVoice calling and call forwarding on Commercial and Enterprise Dedicated lines.
SupportedAgents place and receive voice calls over shared and dedicated iMessage lines.
Other channels
SMS
SupportedFrom the iMessage line, or through your own Twilio account.
SupportedSMS and MMS on dedicated VoIP numbers, US and Canada included. Group MMS is beta.
RCS
SupportedRCS fallback on numbers, plus an RCS for Business channel type.
PartialOnly as a transport reported on iMessage lines; not a channel you can pick.
WhatsApp
SupportedWhatsApp Business Platform (Cloud API) on the v4 API.
Not supportedNot offered
Telegram
Not supportedNot offered
Not supported
Slack
Not supported
BetaSlack is in beta: read, reply, files and retained history search.
Email
Not supportedNot offered. iMessage can be sent to email handles.
SupportedEach identity gets a mailbox, with custom domains and IMAP/SMTP access.
Phone calls
PartialVoice calling and forwarding on dedicated plans. No calling API documented.
SupportedInbound and outbound calls with your own WebSocket agent or Inkbox Voice AI (beta).
Apple Messages for Business
SupportedBlooio says it is an official Apple Messages for Business MSP.
Not supportedNot offered
Unified channel API
Supportedv4 API covers iMessage, SMS, RCS, WhatsApp and Apple Messages for Business.
PartialOne identity and one webhook subscription across channels, but separate APIs per channel.
Developer tools
REST API
Supported
Supported
TypeScript SDK
Supported@blooio/sdk
Supported@inkbox/sdk
Python SDK
Supportedblooio on PyPI.
Supportedinkbox on PyPI
Other SDKs
SupportedGo and Java SDKs.
SupportedRust SDK (inkbox crate).
CLI
Not listed
Supported@inkbox/cli
Webhooks
Supported
Supported
Signed webhooks
SupportedHMAC-SHA256 with timestamp, rotatable secrets and delivery replay.
SupportedHMAC-SHA256 with a per-identity signing key.
MCP server
SupportedHosted at mcp.blooio.com/v4.
SupportedRemote Streamable HTTP endpoint at inkbox.ai/mcp, with a separate ChatGPT endpoint.
Open source
PartialSDKs are Apache-2.0 on GitHub. The messaging platform is closed.
PartialSDK, CLI, skills and examples are MIT on GitHub. The service is closed.
Self-hosting
Not supportedBlooio says it is not a self-hosted iMessage relay.
Not listed
Local testing
Not listed
Not listed
Custom channel providers
PartialYour own Twilio account can be added as an SMS channel under the same API.
Not listed
Event replay
SupportedWebhook delivery logs with replay, plus an events feed to list past events.
SupportedDelivery log with replay. Incoming-call and Slack deliveries cannot be replayed.
OpenTelemetry
Not listed
Not listed
No-code integrations
SupportedGoHighLevel, n8n, Make, Zapier and IFTTT.
Not listed
CRM integrations
SupportedGoHighLevel and HubSpot.
Not listed
Built for AI agents
Agent framework
PartialNo own framework. Community Chat SDK adapter, plus plugins for Hermes Agent and eve.
PartialIdentity layer with contact memories across email, texts and calls. No conversation framework.
Agent framework integrations
SupportedBlooio publishes Hermes Agent and eve channel plugins. The Chat SDK adapter is a community package.
SupportedPlugins for Hermes Agent, OpenClaw, OpenCode, Codex, Claude Code and DeepSeek Harness.
Streaming replies
Not listed
Not listed
Agent group chats
Not listed
Not listedAgents can reach each other over A2A tasks, but not in group chats.
Human handoff
PartialHandoff webhook events, documented for Apple Messages for Business chats.
PartialPeople can reply from the Console, and Voice AI can transfer a call. No handoff controls for agents.
Audit logs
PartialLists audit logging among internal security controls. No customer audit log documented.
Not listed
Message history API
SupportedRetention runs 90 days to unlimited depending on plan.
SupportedList and read conversations and threads, with search on texts and email.
Plans and compliance
Free plan
PartialFree trial is 20 messages total on a shared number. Apple Messages for Business has a free sandbox.
SupportedFree: 3 identities, shared iMessage up to 2,000 messages a month and 3 recipients at a time.
Public pricing
SupportedNumber plans from $39/mo. Apple Messages for Business is custom, per monthly active user.
Supported
No per-message fees
SupportedNumber plans are flat. Apple Messages for Business is billed per monthly active user.
PartialiMessage is capped per plan with no per-message fee. Extra SMS/MMS and call minutes cost $0.03 each.
Uptime SLA
SupportedContractual SLA with a signed Enterprise Order Form; 99.9% uptime target
Not listed
Isolated infrastructure
PartialDedicated numbers are isolated to your workspace. No per-customer servers or devices described.
PartialDedicated iMessage infrastructure is listed for Enterprise only.
SOC 2 Type II
Not supportedTrust Center lists SOC 2 Type 1 and Type 2 as in progress.
Not listed
GDPR
SupportedTrust Center marks GDPR as passing.
Not listedThe DPA names the CCPA only; GDPR is not mentioned.

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

Pricing

Blooio

A free trial with 20 messages, shared plans at $39 and $89 a month, Commercial Dedicated at $289 a month per line, an Inbound plan at $98 a month, and Enterprise Dedicated from $195 a month per line at 6+ lines.

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

Source

Inkbox

Free covers 3 identities with shared iMessage; Developer is $25 a month with a VoIP number; Startup is $167 a month with one dedicated iMessage number; Enterprise is custom. SMS/MMS and call minutes over allowance cost $0.03 each.

Pricing model: monthly plans with allowances, plus per-unit SMS/MMS and call-minute overage

Source

Which should you choose?

Choose Blooio if you need group name and photo, formatted text, rich link previews and voice messages.

Choose Inkbox if you need contact cards, Slack, email and CLI.

Frequently asked questions

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