Project Blue vs rustpush

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

Project Blue

iMessage, SMS and FaceTime Audio lines inside your CRM
Starting price
$166/month per line, billed annually
Free plan
Free trial on a shared line, verified numbers only

rustpush

Rust library for the iMessage, FaceTime and APNs protocols
Starting price
Free
Free plan
Free source (SSPL v1)

Project Blue supports 42 of the 77 features compared here, and rustpush supports 39.

Feature comparison

FeatureProject Bluerustpush
iMessage messaging
iMessage
Supported
SupportedRegisters as an Apple device and talks to Apple's servers directly; read from source, no docs
Group chats
SupportedSend to groups of 2 to 32 by API. Not on trial accounts, and group sends do not sync to the CRM.
SupportedConversations carry a participant list and optional group name
Group management
PartialGroups are created by sending to a set of numbers. No add or remove member endpoints documented.
SupportedChangeParticipants messages add or remove members
Group name and photo
PartialgroupName can be set when a group is created. No group photo documented.
SupportedRename and IconChange messages set a group's name and photo
Mentions
Not listed
SupportedMention message parts
Tapbacks
PartialSend or remove the six classic tapbacks on inbound iMessages. Receiving reactions is not documented.
SupportedSix classic tapbacks plus emoji; sticker tapbacks are receive only
Threaded replies
Not listed
Supportedreply_guid and reply_part on messages
Typing indicators
PartialSend only, iMessage only, into an existing conversation. Inbound typing events not documented.
SupportedTyping message type
Read receipts
Not listed
SupportedRead and Delivered message types
Edit and unsend
Not listed
SupportedEdit and Unsend message types
Message effects
Supported4 bubble and 9 screen effects through the effect field. iMessage only.
Supportedeffect field on messages
Animated text effects
Not listed
SupportedBig, small, shake, nod, explode, ripple, bloom and jitter
Stickers
Not listed
PartialSticker tapbacks are received; the code marks sending them as unsupported
Formatted text
Not listed
SupportedBold, italic, underline and strikethrough
Attachments
SupportedImages, videos and vCards by URL.
SupportedInline data or MMCS (iCloud) file transfer
Live Photos
Not listed
PartialReceived attachments carry a Live Photo flag; uploads always set it to false
Rich link previews
Not listed
SupportedLinkMeta with LPLinkMetadata rich link data
Voice messages
SupportedAudio files sent as voice memos, plus AI text-to-speech voice memos.
Supportedvoice flag on messages
Contact cards
SupportedVCF files through mediaAttachmentUrl.
Not listed
Polls
Not listed
Not listed
Chat backgrounds
Not listed
SupportedSetTranscriptBackground sets or removes a chat background
Location sharing
Not listed
PartialFind My clients read friends' and items' locations; OpenBubbles says sharing live location is unsupported
iMessage apps
Not listed
SupportedExtension app balloons with template layouts
Live app cards
Not listed
SupportedUpdateExtension messages update a sent app balloon
Sender name and photo
SupportedSet, read and share a line's Share Name and Photo card by API.
SupportedShare Name and Photo, including contact posters
FaceTime calls
PartialFaceTime Audio only, outbound and inbound, on FaceTime-enabled accounts. Not on trials.
SupportedCreate, ring, join and leave FaceTime sessions
Delivery status
PartialMessages carry a status field such as delivered. Webhooks cover only inbound and outbound messages.
SupportedDelivered and Read receipts plus error messages
iMessage availability check
Supported
SupportedIDS lookups validate targets before sending
Focus and Notify Anyway
Not listed
SupportedNotifyAnyways messages; StatusKit shares and receives Focus status
Numbers and delivery
Managed lines
SupportedNo iPhone, Mac or SIM needed. Lines are set up remotely, usually within one business day.
Not supportedA library; you register your own Apple ID and device identity
Dedicated numbers
SupportedA dedicated line per rep, never shared. New lines are requested by API and provisioned by the team.
Not supportedNot offered
Shared numbers
PartialTrial accounts only: a shared line that can reach verified numbers.
Not supported
Bring your own number
SupportedExisting numbers can be ported to Project Blue's carrier partner.
SupportedYour own Apple ID; a phone number registers through an iPhone running a relay app
Line pooling
SupportedSends without lineId are load balanced across your lines.
Not listed
SMS fallback
SupportedFalls back to SMS from the same line when iMessage is unavailable.
Not listed
RCS fallback
Not listedHomepage describes fallback from iMessage to WhatsApp to SMS. RCS fallback is not described.
Not listed
Outbound-first messaging
SupportedLines are sold as outbound-ready. Guidelines rule out mass outbound iMessage.
SupportedSend to any handle after an IDS key lookup
Calls on the iMessage number
SupportedDialer and FaceTime Audio calls from the same number as the messaging line.
PartialFaceTime on the same Apple ID; no phone calls
Other channels
SMS
Supported
PartialSMS message type, sent through text forwarding from a registered iPhone
RCS
PartialRCS for rich media was rolled out in 2026. The API lists RCS as inbound only.
Not listed
WhatsApp
PartialHomepage lists WhatsApp as a fallback step. No WhatsApp option in the API, and llms.txt says it is not a WhatsApp API.
Not supportedNot offered
Telegram
Not supportedNot offered
Not supported
Slack
PartialSlack notifications for inbound replies. Not a messaging channel.
Not supported
Email
Not supportedDeveloper page says it is not a general email API.
Not supported
Phone calls
SupportedCloud dialer with inbound, outbound, routing, recording and voicemail, plus a browser calling SDK.
Not supportedNot offered; FaceTime only
Apple Messages for Business
Not supportedNot offered
Not supportedNot offered
Unified channel API
PartialOne send endpoint covers iMessage and SMS. Calls and FaceTime use separate endpoints.
PartialiMessage and forwarded SMS share one message type; no other channels
Developer tools
REST API
SupportedREST API with Bearer keys and an OpenAPI spec.
Not supportedRust library only; no HTTP API
TypeScript SDK
Partial@tryprojectblue/dialer is a browser SDK for phone calls only. No messaging SDK.
Not listedRust crate only
Python SDK
Not listed
Not listed
Other SDKs
Not listed
PartialThe library itself is a Rust crate; no other language bindings found
CLI
Not listed
Not listed
Webhooks
SupportedInbound and outbound message events and inbound FaceTime call events.
Not supportedLibrary only; your code receives messages directly, no webhooks
Signed webhooks
Not listedWebhook docs do not mention signatures.
Not supportedNo webhooks
MCP server
SupportedRemote MCP server with OAuth 2.1, plus an optional Claude Code plugin.
Not listed
Open source
PartialThe dialer SDK is MIT licensed on npm. The platform is closed.
PartialSource under SSPL v1; the Mac validation-data module is a closed-source stub
Self-hosting
Not listedHosted service on Project Blue lines. Self-hosting is not mentioned.
SupportedRuns inside your own application
Local testing
Not listedTrial accounts send real messages to verified numbers; docs say they are not a simulator.
Not listed
Custom channel providers
Not listed
Not listed
Event replay
Not supportedDocs say webhooks have no retries and failed deliveries are not replayed.
Not listed
OpenTelemetry
Not listed
Not listed
No-code integrations
SupportedGoHighLevel conversation provider with workflow actions and triggers. llms.txt also lists Zapier.
Not listed
CRM integrations
SupportedHubSpot and Close CRM. Salesforce is not listed.
Not listed
Built for AI agents
Agent framework
Not listed
Not listed
Agent framework integrations
Not listed
Not listed
Streaming replies
Not listed
Not listed
Agent group chats
Not listed
Not listed
Human handoff
PartialReps reply in the CRM inbox and can join group threads. No agent handoff controls documented.
Not listed
Audit logs
Not listed
Not listed
Message history API
SupportedList and get messages, inbound and outbound, with filters.
SupportedMessages in iCloud sync for chats, messages and attachments
Plans and compliance
Free plan
PartialFree trial on a shared line to verified numbers. Some endpoints are off on trial.
SupportedFree source under SSPL v1
Public pricing
Supported$166/month per line billed annually, or $199/month per line on a 12-month plan.
Not listedNo prices or commercial license terms published
No per-message fees
SupportedFlat per-line pricing with unlimited texting under fair use.
SupportedNo fees; free source
Uptime SLA
Not listedSite cites a 99.9% uptime record and a public status page. No contractual SLA found.
Not supportedSSPL disclaims all warranty
Isolated infrastructure
PartialEach rep gets a dedicated line that is never shared. Other infrastructure is not described.
SupportedRuns in your own process and infrastructure
SOC 2 Type II
Not listed
Not listedSelf-hosted; compliance is up to the operator
GDPR
PartialPrivacy policy lists GDPR and UK GDPR rights. No DPA 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

Project Blue

Flat per-line pricing: $166 a month per line billed annually or $199 a month per line on a 12-month plan, with a free trial on a shared line.

Pricing model: flat per line

Source

rustpush

rustpush is free source under SSPL v1; you supply Apple hardware identifiers or an always-on iPhone relay, and anyone offering it as a service must publish their service's source.

Pricing model: free self-hosted library

Source

Which should you choose?

Choose Project Blue if you need contact cards, managed lines, dedicated numbers and shared numbers.

Choose rustpush if you need mentions, threaded replies, read receipts and edit and unsend.

Frequently asked questions