Best Linq Alternatives in 2026

Photon leads this list with support for 75 of the 77 features we compare. Each entry shows what it adds over Linq, its starting price and a full side-by-side comparison.

The product you are replacing

Linq

iMessage, RCS and SMS API with flat monthly pricing

Starting price

$260/month (Pro)

Free plan

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

Visit LinqRead more

1. 

   Photon

   Open-source agent framework with managed iMessage

   Starting price

   $25/month (Pro)

   Free plan

   Free: shared iMessage lines, up to 10 users (2.0 beta: 25 shared iMessage assignments and $100 credit)

   #1What it adds over Linq

   • Live Photos
   • Focus and Notify Anyway
   • Bring your own number
   • Telegram
   • Slack

   Compare with Linq

   Visit PhotonRead more
2. 

   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

   #2What it adds over Linq

   • FaceTime calls
   • Focus and Notify Anyway
   • Bring your own number
   • Apple Messages for Business
   • Custom channel providers

   Compare with Linq

   Visit BlooioRead more
3. 

   Sendblue

   iMessage API and CRM texting for sales and agents

   Starting price

   $100/month per line

   Free plan

   Free sandbox: shared number, up to 10 verified contacts, no webhooks

   #3What it adds over Linq

   • FaceTime calls
   • Bring your own number
   • Agent group chats
   • Human handoff

   Compare with Linq

   Visit SendblueRead more
4. 

   LoopMessage

   iMessage, SMS, RCS and WhatsApp on one number

   Starting price

   $59.99/month per sender (Light)

   Free plan

   Sandbox: $0, 5 contacts, testing only; free shared plan for schools and non-profits

   #4What it adds over Linq

   • Bring your own number
   • Human handoff

   Compare with Linq

   Visit LoopMessageRead more
5. 

   Chert

   iMessage and FaceTime numbers for AI agents

   Starting price

   $25/month (Shared)

   Free plan

   24-hour trial: 10 messages and 10 FaceTime minutes on a shared line

   #5What it adds over Linq

   • Live Photos
   • FaceTime calls
   • Human handoff

   Compare with Linq

   Visit ChertRead more
6. 

   BlueBubbles

   Free, open-source iMessage bridge you host on a Mac

   Starting price

   Free

   Free plan

   Free and open source (Apache-2.0)

   #6What it adds over Linq

   • Live Photos
   • FaceTime calls
   • Focus and Notify Anyway
   • Bring your own number
   • Self-hosting

   Compare with Linq

   Visit BlueBubblesRead more
7. 

   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

   #7What it adds over Linq

   • Bring your own number
   • Self-hosting
   • Local testing
   • Human handoff

   Compare with Linq

   Visit MessageBlueRead more
8. 

   Twilio

   Global CPaaS for SMS, RCS, WhatsApp and voice

   Starting price

   $0.0083 per US SMS segment

   Free plan

   30-day free trial, no card, with 100 SMS and 75 voice minutes

   #8What it adds over Linq

   • Bring your own number
   • Email
   • Apple Messages for Business
   • Local testing
   • Custom channel providers

   Compare with Linq

   Visit TwilioRead more
9. 

   Bird

   Email, SMS, WhatsApp and Apple Messages APIs

   Starting price

   $0.0035 per US outbound SMS segment plus carrier fees

   Free plan

   Free email tier of 1,000 emails a month; free shared Inbox

   #9What it adds over Linq

   • Bring your own number
   • Telegram
   • Email
   • Apple Messages for Business
   • Self-hosting

   Compare with Linq

   Visit BirdRead more
10. 

    Telnyx

    Low per-part SMS pricing with carrier fees at cost

    Starting price

    $0.004 per US SMS part plus carrier fee

    Free plan

    Trial account with $5 testing credit

    #10What it adds over Linq

    • Bring your own number
    • Email
    • Local testing
    • Streaming replies
    • Agent group chats

    Compare with Linq

    Visit TelnyxRead more
11. 

    Vonage

    Messages API for SMS, RCS, WhatsApp, Viber and email

    Starting price

    $0.00860 per US SMS on a long virtual number, plus carrier fees

    Free plan

    Free credit at signup with no card, and a free Messages API Sandbox capped at 100 messages a month

    #11What it adds over Linq

    • Bring your own number
    • Email
    • Custom channel providers
    • Streaming replies
    • Agent group chats

    Compare with Linq

    Visit VonageRead more
12. 

    Infobip

    Global CPaaS and Apple Messages for Business provider

    Starting price

    $0.0075 to $0.0083 per US SMS (indicative)

    Free plan

    60-day free trial, no card, up to 100 messages per channel to your verified number

    #12What it adds over Linq

    • Bring your own number
    • Telegram
    • Email
    • Apple Messages for Business
    • Local testing

    Compare with Linq

    Visit InfobipRead more
13. 

    Sinch

    CPaaS with 13 messaging channels in one API

    Starting price

    $0.0078 per US 10DLC SMS, plus carrier fees

    Free plan

    Free developer account with an SMS sandbox and test credit

    #13What it adds over Linq

    • Bring your own number
    • Telegram
    • Email
    • Local testing
    • Custom channel providers

    Compare with Linq

    Visit SinchRead more
14. 

    Claw Messenger

    iMessage for personal AI agents, no Mac needed

    Starting price

    $5/month for 250 messages

    Free plan

    7-day free trial, card required

    #14What it adds over Linq

    Nothing on our feature list that Linq lacks.

    Compare with Linq

    Visit Claw MessengerRead more
15. 

    messages.dev

    TypeScript-first iMessage, RCS and SMS API

    Starting price

    $99/month per line

    Free plan

    Sandbox: 50 messages a day to your own paired phone

    #15What it adds over Linq

    • Local testing

    Compare with Linq

    Visit messages.devRead more
16. 

    Texting Blue

    Shared team iMessage inbox on your own iPhone number

    Starting price

    $19/month per number

    Free plan

    3-day free trial

    #16What it adds over Linq

    • Bring your own number
    • Human handoff

    Compare with Linq

    Visit Texting BlueRead more
17. 

    Apple Messages for Business

    Apple's official business chat in the Messages app

    Starting price

    Free from Apple; MSP fees vary

    Free plan

    Apple charges nothing; an MSP is still required

    #17What it adds over Linq

    • Apple Messages for Business
    • Human handoff

    Compare with Linq

    Visit Apple Messages for BusinessRead more

Linq vs the top alternatives

Linq next to the 4 alternatives that support the most features on our list.

Feature	Linq	Photon	Blooio	Sendblue	LoopMessage
iMessage messaging
iMessage	Supported	SupportedManaged cloud lines, or your own Mac with the local provider	Supported	Supported	Supported
Group chats	SupportedPro plan. Up to 31 recipients. No read or delivery receipts in groups.	SupportedOn the Business plan (dedicated lines)	Supported	BetaGroup API is in beta on select plans. AI Agent plan can only reply in existing groups.	SupportedSend and receive in iMessage groups; not available in the sandbox.
Group management	SupportedAdd and remove participants and leave a group, iMessage groups only, 3-member minimum.	SupportedCreate groups and add, remove or leave members; Business plan (dedicated lines)	PartialCreate groups by API. Adding or removing members is marked coming soon (returns 501).	BetaAdd and remove participants in iMessage groups via the beta groups API.	SupportedCreate groups (needs the Init conversations add-on) and add or remove members.
Group name and photo	SupportedSet display_name and group_chat_icon on group chats.	SupportedRename groups and set group photos; Business plan (dedicated lines)	SupportedRename groups and set or remove group icons.	SupportedRename groups and set group photos on supported lines.	SupportedSet group name (32 characters max) and photo with PATCH.
Mentions	SupportedGroup chats only. Notifies iMessage recipients even in a muted chat.	SupportedSend @mentions in multipart messages and read mention ranges on inbound	Not listedA guide index lists mentions, but no mention field is documented.	Not listed	Not listed
Tapbacks	SupportedSix classic tapbacks or any emoji, send and receive via reaction webhooks.	SupportedSix native tapbacks plus emoji reactions, send and receive	SupportedAdd or remove tapbacks on any message; inbound reactions arrive as message.reaction events.	PartialSend classic tapbacks or any emoji. No inbound reaction events documented.	SupportedSix tapbacks or any emoji; inbound reactions arrive as message_reaction webhooks.
Threaded replies	Supportedreply_to with optional part_index. iMessage only.	Supported	Supportedreply_to on sends.	Supportedreply_to on V2 iMessage lines, in direct and group chats.	Supportedreply_to_id on send; inbound webhooks carry a thread object.
Typing indicators	SupportedSend and receive, in direct and group chats. iMessage only.	Supported	SupportedSend, and receive typing.started and typing.stopped events.	SupportedSend and receive. iMessage 1:1 only, not in groups.	SupportedUp to 60 seconds; fails if the chat had no two-way activity in the last 5 minutes.
Read receipts	SupportedMark chats read and receive message.read. One-to-one chats only.	SupportedMark chats read and receive read events; group receipts are best-effort	SupportedMark chats read and receive message.read events.	PartialCan mark chats read (1:1). Outbound statuses stop at DELIVERED, with no read status.	PartialYou can mark chats read; no read event is documented for your outbound messages.
Edit and unsend	PartialEdit text up to 5 times within 15 minutes. Delete does not unsend from the recipient's device.	SupportedEdit within 15 minutes and unsend within 2 minutes (Apple limits)	Not listed	Not supportedDocs say editing is not supported via API and delete does not unsend.	SupportedEdit within 15 minutes, unsend within 2 minutes of sending.
Message effects	Supported11 screen and 4 bubble effects.	SupportedAll bubble and screen effects, including invisible ink	Supportedeffect field on text sends.	Supported13 send_style values.	Supported13 bubble and screen effects via the effect field.
Animated text effects	Supportedtext_decorations animations: big, small, shake, nod, explode, ripple, bloom, jitter.	SupportedPer-range effects such as bloom, shake, explode and jitter	Not listed	Not listed	SupportedMarkup for shake, nod, explode, ripple, bloom and jitter.
Stickers	SupportedPeel emoji or images onto messages, send stickers, or place them inline in text.	SupportedPlace image stickers on any bubble with position, scale and rotation; sticker events inbound	Not listed	Not listed	PartialInbound messages can have type sticker; sending stickers is not documented.
Formatted text	SupportedBold, italic, underline and strikethrough ranges, plus animated text. iMessage only.	SupportedMarkdown rendered as native bold, italic, underline and strikethrough	SupportedMarkdown bold, italic, underline and strikethrough sent as iMessage rich text.	Not listed	SupportedBold, italic, underline, strikethrough and text sizes in iMessage.
Attachments	SupportedUp to 10MB by URL, 100MB with pre-upload.	SupportedFiles up to 100 MiB by default, including Live Photos	Supported	SupportedUp to 100MB on iMessage, 5MB on SMS.	SupportedUp to 10 public HTTPS file URLs per message.
Live Photos	Not listed	SupportedHEIC still plus MOV companion uploaded as one Live Photo	Not listed	Not listed	Not listed
Rich link previews	Supportedlink parts render as rich previews on iMessage and RCS.	Supportedrichlink() asks Messages to render its own preview	Supportedrich_link bubbles with image and title overrides.	PartialDocs say links expand only after the recipient saves your contact.	SupportedLinks get rich previews by default; preview: false sends plain text.
Voice messages	SupportedDedicated voice memo endpoint renders the native iMessage voice bubble.	Supported	SupportedA single audio file is sent as a native voice memo.	SupportedSend .caf files to render as inline voice notes.	SupportedSend audio files as voice messages; inbound audio is transcribed.
Contact cards	SupportedSend .vcf files as media parts.	SupportedvCard or structured contacts, plus the bot's own native contact card	Not listedAttachments accept other files, but .vcf is not named. Name and Photo cards are documented.	SupportedSend .vcf files via media_url.	Supportedcontact_file adds a vCard to the message.
Polls	SupportedCreate, add options, vote and read tallies, with poll webhooks. Not as a chat's first message.	SupportedCreate, vote, add options and receive poll events; all managed plans	SupportedSend, vote and read results, with poll webhooks.	Not listed	Not listedA helpdesk article lists polls among features, but no poll API is documented.
Chat backgrounds	SupportedColor, animated or photo backgrounds, in direct and group chats.	Supported	SupportedImage backgrounds only.	Not listed	Not listed
Location sharing	SupportedRequest, read and stop Find My shares. Live location is a $79/mo add-on on Pro.	SupportedFind My requests and live location; Business plan	PartialReads Find My locations of contacts already sharing. Location access is provisioned on request.	SupportedFind My request, read and live watch. Dedicated iMessage lines only.	PartialInbound messages can have type location; sending a location is not documented.
iMessage apps	SupportedPro plan. Cards from your own Messages extension, or Linq-hosted cards (Experiences).	SupportedCustom and live app cards; iMessage mini apps on the Business plan	SupportedCustom bubbles for your own iMessage app extension, sent and received.	SupportedApp Cards for your own Messages extension. V2 lines, not on the free plan.	Not listed
Live app cards	SupportedUpdate App Card replaces a delivered iMessage app or Experience card in place.	SupportedEdit an app card in place and render live UI without a new bubble	Not supportedDocs say a send cannot continue an app session; each bubble starts a new one.	PartialUpdates go out as new messages in the same App Card session; Sendblue says the original is not edited.	Not listed
Sender name and photo	SupportedContact card API sets name and photo, shared per chat via Name and Photo Sharing.	SupportedShares the agent's name and photo automatically; Business plan	SupportedSet name and avatar per number and share the card into a chat.	SupportedName and Photo Sharing profile per line, shared into direct iMessage chats.	Not listedDocs suggest sending a vCard so recipients see your name and photo.
FaceTime calls	Not supportedDocs say the API does not place or answer calls.	Not listed	PartialOn request for dedicated lines. Docs say the FaceTime API is disabled for now (returns 501).	PartialOutbound FaceTime audio over WebRTC (Agora). Needs a purchased FaceTime line.	Not supportedFaceTime API is in progress on the roadmap; today only an inbound FaceTime call webhook.
Delivery status	Supportedsent, delivered, read and failed webhooks. Groups report sent only.	SupportedSent, delivered, read and send-error fields per message	Supported	SupportedStatus callbacks from REGISTERED through SENT or DELIVERED.	Supportedmessage_delivered and message_failed webhooks, plus a status lookup by ID.
iMessage availability check	Supportedcheck_imessage and check_rcs endpoints.	SupportedCheck if a number or email can get iMessage, SMS or RCS before sending	SupportedLive per-number iMessage, SMS and RCS capability lookup.	SupportedLookup API checks a phone number or email for iMessage.	PartialThrough LoopLookup, a separate LoopMessage service.
Focus and Notify Anyway	Not listed	SupportedCheck if a recipient has Focus on, then trigger Notify Anyway	SupportedRead a contact's Focus status and send Notify Anyway. Direct chats only.	Not listed	Not listed
Numbers and delivery
Managed lines	Supported	SupportedSpectrum Cloud runs the Mac fleet; no Mac needed	SupportedPre-warmed numbers claimed self-serve from the dashboard.	Supported	SupportedDedicated senders run on hardware LoopMessage rents to you.
Dedicated numbers	SupportedPaid lines are dedicated. Provisioned by Linq, no self-serve number API.	Supported$250 per line per month on Business	Supported	Supported	SupportedPhone number option is +$15/mo per dedicated sender; email senders also offered.
Shared numbers	SupportedFree Hobby tier uses a Shared Line, inbound-first, 20 contacts.	SupportedFree and Pro route each user through a managed shared pool	SupportedStarter and Commercial Shared use managed shared pools.	SupportedFree sandbox uses a shared number with verified contacts only.	SupportedShared senders for AI assistant use from $20/mo; free sandbox for testing.
Bring your own number	Not listed	SupportedYour own Apple ID when self-hosting on a Mac, and your own number for WhatsApp Business	PartialiMessage only by porting on dedicated plans. Your own Twilio number can carry SMS.	PartialOnly by porting the number in, which adds 3 to 5 days.	PartialYou can port a US number in; your own Apple IDs are not accepted.
Line pooling	SupportedManaged load balancing (Pro): send without from and Linq picks and fails over lines.	SupportedBusiness: auto-scale adds lines and a routing endpoint balances users	SupportedNumber pools and channel priorities; a contact keeps one number in a pool.	SupportedNumber pooling with sticky sending. Automatic line selection needs account enablement.	SupportedSender pools balance new contacts across senders and match replies to the right one.
SMS fallback	Supported	SupportedOn every plan per pricing; carrier rules apply to fallback traffic	Supported	Supported	SupportedPaid add-on, +$15/mo per dedicated sender; included on shared plans.
RCS fallback	SupportedOrder is iMessage, then RCS, then SMS.	Supported	Supported	SupportediMessage, then RCS, then SMS. RCS on V2 lines.	SupportedSame add-on uses RCS instead of SMS when the device supports it.
Outbound-first messaging	SupportedFree Hobby tier is inbound-first. Docs recommend inbound-first flows to avoid flagging.	SupportedBusiness plan, up to 50 new contacts per line per day	SupportedShared plans cap new conversations per day. Inbound plan is reply-only.	SupportedFull outbound on Enterprise or Blue Ocean; Free and AI Agent plans are inbound-first	PartialInit conversations add-on (+$30/mo), warm-up and recent opt-in required; no cold messaging.
Calls on the iMessage number	PartialAPI forwards inbound calls on the line; outbound needs caller-ID masking via another provider.	SupportedPlace and receive SIP calls from the line people already text	SupportedVoice calling and call forwarding on Commercial and Enterprise Dedicated lines.	SupportedDashboard calls and FaceTime from the texting number; API calls via your Twilio caller ID.	PartialInbound cell calls to the sender number are forwarded (add-on); no outbound calls.
Other channels
SMS	Supported	BetaStandalone SMS and MMS numbers with 10DLC in the 2.0 beta; SMS fallback on iMessage lines today	SupportedFrom the iMessage line, or through your own Twilio account.	Supported	SupportedSet channel to sms; needs the SMS/RCS add-on.
RCS	Supported	PartialSent on the iMessage line when the recipient cannot get iMessage	SupportedRCS fallback on numbers, plus an RCS for Business channel type.	SupportedV2 lines.	SupportedSet channel to rcs; needs the SMS/RCS add-on.
WhatsApp	BetaSeparate WhatsApp API in beta. Access by request, no SLA.	SupportedWhatsApp Business, one-to-one, on the Business plan	SupportedWhatsApp Business Platform (Cloud API) on the v4 API.	Not supportedNot offered	SupportedAdd-on, +$10/mo, on the same phone number and API.
Telegram	Not supportedNot offered	Supported	Not supportedNot offered	Not supported	Not supportedPlanned on the roadmap, not available yet.
Slack	Not supported	Supported@spectrum-ts/slack provider on npm and GitHub	Not supported	Not listed	Not listed
Email	Not supportedNot offered. iMessage can be sent to Apple ID email handles.	BetaYour own domain with DKIM, SPF and inbound MX in the 2.0 beta	Not supportedNot offered. iMessage can be sent to email handles.	Not supportedNot offered. iMessage can be sent to Apple ID email addresses.	Not listed
Phone calls	PartialAPI does not place or answer calls; it forwards inbound calls. Calling lives in the Linq Blue app.	SupportedSIP calls on iMessage lines; the 2.0 beta adds calls on SMS numbers	PartialVoice calling and forwarding on dedicated plans. No calling API documented.	PartialNo native calling API. Dashboard calls, outbound via your Twilio caller ID, inbound forwarding.	PartialInbound cell calls are forwarded to a number you choose (add-on); no call API.
Apple Messages for Business	Not listedAI context page mentions it, but no product page or docs were found.	BetaListed as available in the 2.0 beta	SupportedBlooio says it is an official Apple Messages for Business MSP.	Not supportedNot offered	Not supportedNot offered; the helpdesk contrasts LoopMessage with it.
Unified channel API	PartialiMessage, RCS and SMS share one API. WhatsApp is a separate API with its own keys and SDKs.	SupportedOne Spectrum SDK across channels, and one REST model in the 2.0 beta	Supportedv4 API covers iMessage, SMS, RCS, WhatsApp and Apple Messages for Business.	SupportedOne API for iMessage, RCS and SMS, the only channels offered.	SupportediMessage, SMS, RCS and WhatsApp on one number and one API.
Developer tools
REST API	Supported	SupportedREST API for projects and lines; sending over REST in the 2.0 beta	Supported	Supported	Supported
TypeScript SDK	Supported@linqapp/sdk	Supportedspectrum-ts, plus low-level iMessage and WhatsApp SDKs	Supported@blooio/sdk	Supportedsendblue on npm.	PartialNo own SDK; Twilio's SDKs work through the Twilio-compatible API.
Python SDK	Supportedlinq-python	Betaphotonhq-api on PyPI, for the 2.0 beta API	Supportedblooio on PyPI.	Supportedsendblue on PyPI.	PartialNo own SDK; docs show Twilio's Python SDK pointed at the Twilio-compatible API.
Other SDKs	SupportedOfficial Go SDK.	SupportedGo client for Advanced iMessage; Rust and Go clients for the 2.0 API	SupportedGo and Java SDKs.	PartialGo, Rust and Ruby packages, listed as community packages.	PartialNo own SDKs; Twilio's SDKs work through the Twilio-compatible API.
CLI	Supported@linqapp/cli: signup, sending, and a local webhook listener.	Supported@photon-ai/cli manages projects, lines, users and billing	Not listed	Supported@sendblue/cli: signup, messaging, contacts and webhooks.	Not listed
Webhooks	Supported	Supported	Supported	Supported	SupportedRetried up to 30 times over several hours.
Signed webhooks	SupportedHMAC-SHA256, Standard Webhooks format, with replay protection.	SupportedHMAC-SHA256, plus Standard Webhooks signatures	SupportedHMAC-SHA256 with timestamp, rotatable secrets and delivery replay.	PartialSends your shared secret in an sb-signing-secret header. No HMAC signature.	PartialYou set an authorization header and verify it; no HMAC signature.
MCP server	Supported@linqapp/sdk-mcp with docs search and code execution tools.	SupportedHosted MCP server, plus an MCP server for the docs	SupportedHosted at mcp.blooio.com/v4.	Supportedsendblue-api-mcp via npx.	PartialDocumentation-only MCP server; no access to your account or messages.
Open source	PartialSDKs, CLI and adapters are Apache-2.0 or MIT on GitHub. The messaging platform is closed.	SupportedMIT: spectrum-ts, imessage-kit and most SDKs	PartialSDKs are Apache-2.0 on GitHub. The messaging platform is closed.	PartialSDKs and CLI are MIT or Apache-2.0 on GitHub. The messaging platform is closed.	PartialOnly the n8n node is MIT on GitHub; the platform is closed.
Self-hosting	Not supportedLinq describes itself as fully managed, in contrast to self-hosted options.	SupportedRun the open-source core on your own Mac and number, no Spectrum Cloud	Not supportedBlooio says it is not a self-hosted iMessage relay.	Not listedSold as a hosted service on Sendblue's Apple devices; self-hosting is not mentioned.	Not listed
Local testing	Not listedThe CLI streams webhooks locally, but tests still use a real phone.	SupportedTerminal chat UI provider, no phone or number needed	Not listed	Not listed	Not listedThe sandbox needs a real iPhone or Mac to message it.
Custom channel providers	Not listed	SupporteddefinePlatform plugs any interface into the same Spectrum API	PartialYour own Twilio account can be added as an SMS channel under the same API.	Not listed	Not listed
Event replay	PartialRetries for 30 minutes; after that, re-fetch chats or ask Linq for a manual replay.	SupportedCatch up on events after a disconnect from a durable sequence	SupportedWebhook delivery logs with replay, plus an events feed to list past events.	PartialNo replay. Docs say to repair gaps by listing messages updated since a timestamp.	PartialWebhook history API to fetch past events; no replay call.
OpenTelemetry	PartialW3C trace IDs on every response and webhook for OTel backends. No export of Linq spans by default.	SupportedOpt-in messaging traces in spectrum-ts, and traces in the 2.0 beta dashboard	Not listed	Not listed	Not listed
No-code integrations	SupportedLinq Blue works as a GoHighLevel messaging provider. No n8n, Make or Zapier found for the API.	Supportedn8n community nodes and a Dify plugin	SupportedGoHighLevel, n8n, Make, Zapier and IFTTT.	SupportedZapier, Make and GoHighLevel. Docs FAQ says n8n resources are coming soon.	Supportedn8n, Zapier, Pipedream, HighLevel and LeadConnector.
CRM integrations	SupportedVia Linq Blue: GoHighLevel, HubSpot and Salesforce.	Not listed	SupportedGoHighLevel and HubSpot.	SupportedGoHighLevel, HubSpot, Salesforce, Close and Monday.com.	SupportedHighLevel CRM and LeadConnector; no HubSpot or Salesforce found.
Built for AI agents
Agent framework	PartialNo own framework. Maintains a Vercel Chat SDK adapter and OpenClaw and Hermes plugins.	SupportedSpectrum is a multi-channel agent framework with streaming replies	PartialNo own framework. Community Chat SDK adapter, plus plugins for Hermes Agent and eve.	PartialNo own framework. Maintains a Vercel Chat SDK adapter.	Not listed
Agent framework integrations	SupportedLinq-maintained Vercel Chat SDK adapter, plus OpenClaw and Hermes Agent plugins.	SupportedVercel Chat SDK, Mastra, LangChain, Convex and others	SupportedBlooio publishes Hermes Agent and eve channel plugins. The Chat SDK adapter is a community package.	SupportedSendblue-maintained Vercel Chat SDK adapter.	Not listed
Streaming replies	Not supportedDocs say the Chat SDK adapter buffers streams into one final message.	SupportedAI output streams into one iMessage bubble, edited in place	Not listed	Not supportedDocs say message editing is not supported via the API.	Not listed
Agent group chats	Not listed	BetaAgents find other agents and add them to a group chat (2.0 beta)	Not listed	BetaA line can add another of your own dedicated lines to a group, via the beta groups API.	Not listed
Human handoff	Not listed	BetaA person can reply in a conversation from the 2.0 beta Inbox	PartialHandoff webhook events, documented for Apple Messages for Business chats.	SupportedShared team inboxes with assignment, and agents that escalate to a rep.	PartialPeople can reply from Slack, email or the embedded inbox; no agent handoff controls.
Audit logs	SupportedDashboard Activity page plus account-change webhooks with actor and origin.	BetaAPI logs and traces in the 2.0 beta dashboard	PartialLists audit logging among internal security controls. No customer audit log documented.	PartialSecurity page says all API requests are logged. No customer-facing audit log documented.	PartialMessage, webhook and API request history kept; no account audit log found.
Message history API	Supported	SupportedList and get messages per chat	SupportedRetention runs 90 days to unlimited depending on plan.	Supported	SupportedPaginated history per contact, filterable by date, direction and type.
Plans and compliance
Free plan	SupportedHobby: $0, up to 20 contacts, through the CLI.	SupportedUp to 10 users on shared lines	PartialFree trial is 20 messages total on a shared number. Apple Messages for Business has a free sandbox.	SupportedFree sandbox: shared number, up to 10 verified contacts, no webhooks.	SupportedSandbox with 5 contacts; free shared plan for schools and non-profits.
Public pricing	SupportedPro from $260/mo. Enterprise is custom.	Supported	SupportedNumber plans from $39/mo. Apple Messages for Business is custom, per monthly active user.	SupportedAI Agent plan at $100/mo per line. Enterprise is custom.	Supported
No per-message fees	Supported	SupportedNo per-message fees for iMessage, WhatsApp or Telegram; SMS, voice and email are metered in the 2.0 beta	SupportedNumber plans are flat. Apple Messages for Business is billed per monthly active user.	Supported	SupportedUnlimited messages; plans cap unique active contacts per day.
Uptime SLA	SupportedContractual SLAs on the Enterprise plan; marketing cites 99.95%	SupportedContractual SLA on the Enterprise plan	SupportedContractual SLA with a signed Enterprise Order Form; 99.9% uptime target	Supported99.99% uptime SLA on the Enterprise plan	Not supportedHelpdesk says LoopMessage does not provide SLAs or contracts.
Isolated infrastructure	SupportedDedicated lines across 4 data centers on paid plans; Hobby uses a shared line	SupportedEach line runs in an isolated, dedicated environment	PartialDedicated numbers are isolated to your workspace. No per-customer servers or devices described.	SupportedA dedicated HIPAA instance for HIPAA customers	SupportedA dedicated sender's number and server are allocated to you alone.
SOC 2 Type II	SupportedType I and Type II, reports for 2022, 2024, 2025 and 2026.	SupportedStated on photon.codes	Not supportedTrust Center lists SOC 2 Type 1 and Type 2 as in progress.	SupportedSOC 2 Type II, report on request.	Not supportedHelpdesk says LoopMessage has not been through a SOC 2 audit.
GDPR	SupportedDPA covers GDPR and UK GDPR, with Standard Contractual Clauses.	SupportedPrivacy policy covers GDPR rights and SCC transfers	SupportedTrust Center marks GDPR as passing.	SupportedPrivacy policy says Sendblue adheres to GDPR. DPAs on request.	SupportedHelpdesk says data is stored following GDPR.

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