Which iMessage API fits a Linux or cloud AI agent?
Choose Claw Messenger for a low-volume managed route without a Mac. Choose Sendblue for its stated enterprise controls, Loop Message for daily contact capacity, or BlueBubbles when you want to run the macOS server yourself.
The short answer
Claw Messenger is the lowest-cost managed starting point in this short comparison. It costs $5 monthly for 250 incoming and outgoing messages.
- Best for
- Low-volume agents running on Linux, Docker, Windows, or cloud servers.
- Not for
- High-volume cold outreach, enterprise compliance procurement, or teams that want to operate their own Mac server.
Four practical starting points
| Option | Published starting price | Best fit |
|---|---|---|
| Claw Messenger | $5 monthly for 250 messages | Managed, low-volume agent threads |
| Sendblue | $100 monthly per AI Agent line | Inbound-first agents and stated enterprise controls |
| Loop Message | From $59.99 monthly | Daily contact allowances |
| BlueBubbles | Free software; Mac required | Personal, self-hosted use |
Official pages checked: Claw Messenger, Sendblue, Loop Message, and BlueBubbles. The detailed matrix below was last fully checked August 31, 2026.
Feature and pricing matrix
| Feature | Sendblue | Loop Message | Blooio | BlueBubbles | Claw Messenger | messages.dev | Chert | Linq |
|---|---|---|---|---|---|---|---|---|
| Starting paid price | $100–$1000/mo (outbound requires Enterprise) | $59.99/mo (Light) | $109/mo (Inbound line) | Free (software) | $5/mo (250 msgs) | $99/mo per line | Not published (sales call) | Not published (sales call) |
| Free or shared tier | Sandbox (10 contacts, inbound testing) | Sandbox (5 contacts, testing only) | Shared number (15 new contacts/day) | Free, self-hosted | None | Sandbox (50 msgs/day) | Not published | Sandbox (per pricing page) |
| Per-message billing | Not published | Not published | Not published (unlimited on paid lines) | N/A (self-hosted) | None on standard self-serve plans | None (unlimited on plan) | Not published | Not published |
| Sender number cost | Included on $100 line | $15/mo add-on | Included on $109 line | Bring your own SIM/Apple ID | Included on all paid plans | Included on $99 line | Not published | Not published |
| Multi-tenant / sub-account support | Enterprise tier (sales call) | Not documented | Yes (agency mode, per-client sub-accounts) | Self-hosted (one Mac per tenant) | Yes (agency tier, $199/mo per sub-tenant, each with its own visible number) | Enterprise tier (no public docs) | Not documented (sales call) | Not documented (sales call) |
| Programmatic per-tenant provisioning | No (sales-assisted) | No | Yes (auto number purchase on agency tier) | No (manual Mac setup) | Yes (API) | Unknown | Unknown | Unknown |
| Mac required | No | No | No | Yes (24/7) | No | No | No | No |
| Hosted or self-hosted | Hosted | Hosted | Hosted | Self-hosted | Hosted | Hosted | Hosted | Hosted |
| iMessage delivery | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| RCS delivery | Yes (V2 lines) | Add-on ($10/mo) | Yes | No | Yes | Yes | Yes (fallback) | Yes |
| SMS fallback | Yes | Add-on ($15/mo) | Yes (via Twilio) | No | Yes | Yes | Yes (fallback) | Yes |
| Group chat | Yes | Partial (reply only, no create/modify) | Yes | Yes | Yes | Unknown | Unknown | Yes |
| Tapbacks, typing, read receipts | Yes | Yes | Yes | Yes | Yes | Yes | Unknown | Tapbacks confirmed; others unknown |
| Outbound first message | Enterprise tier only | Add-on ($30/mo + $30 one-time) | Dedicated/Commercial tier | Yes | Yes | Yes | Yes | Yes |
| Webhooks | Yes (signed) | Yes | Yes (signed, with replay) | Yes (local) | Yes (HMAC-signed) + WebSocket | Yes (signature verification) | Yes (inbound + outbound events) | Unknown |
| SDK languages | Node, Python, Ruby, PHP, Go, Java (+ MCP) | REST only (no official SDKs) | Node, Python, Go, Java | REST + community SDKs | REST + WebSocket, any language | TypeScript (others via REST) | Not published | Not published |
| Geographic coverage | US-first; international varies | US, EU, others (varies by sender) | US-focused (tier-1 carrier partnerships) | Wherever your Mac is | US (international on roadmap) | Unknown | Unknown | Global stated; US primary |
| Apple risk posture | Standard (no public bans documented) | Standard (no public bans documented) | Standard (no public bans documented) | You operate the Mac; Apple ToS exposure is yours directly | Standard (no public bans documented) | Standard (no public bans documented) | Publicly documents deliverability engineering on their homepage | Publicly documented Apple account ban incident on their engineering blog |
| Compliance posture | SOC 2 Type II; HIPAA on Enterprise | Standard (no public certs) | Standard (no public certs) | Your responsibility | A2P registration handled; no public certs yet | SOC 2 in progress; GDPR stated | Not published | SOC 2 Type II claimed |
When to choose each
Sendblue
The most mature documentation, SOC 2 Type II, and HIPAA on Enterprise. A good fit when compliance review is part of the buying process or when you want a long-standing CRM-adjacent vendor (Salesforce, HubSpot integrations). Pricing starts at $100/mo per line, so it gets expensive for low-volume agents or multi-tenant fan-out.
Loop Message
The widest range of sender-identity options (custom sender name, phone number, RCS, SMS fallback as separate add-ons). Useful when you want to control exactly which channels and identity surface a given account uses, and you are willing to pay for each as an add-on on top of the $59.99 or $99.99 base.
Blooio
Flat-rate unlimited messaging on paid lines, with native CRM integrations (GoHighLevel, HubSpot, Zapier, n8n) and advanced iMessage features (polls, FindMy, FaceTime links). Good fit if you want unlimited volume on one line and value CRM-native workflows.
BlueBubbles
Free and self-hosted. The right choice when you already have a Mac you are willing to keep online 24/7, you only need iMessage (no RCS or SMS fallback), and you want full control of the stack. Hardware, Apple ID health, and uptime are your problem.
Claw Messenger
Lowest entry price ($5/mo for 250 messages), no Mac, and one of two providers in this list with programmatic per-tenant provisioning on a published agency tier ($199/mo per sub-tenant, each with its own visible sending number and 1,000 messages included). Built for AI agents from day one (native OpenClaw plugin plus REST and WebSocket APIs). A2P registration handled; no public SOC 2 or HIPAA certifications yet.
Read the no-Mac AI-agent decision and two-way setup for the Docker, Linux-server, managed-infrastructure path.
messages.dev
Clean TypeScript-first SDK at $99/mo per line, with sandbox access at 50 messages/day. A reasonable fit for AI agent developers who already live in TypeScript and want signature-verified webhooks out of the box. The team and funding behind messages.dev are not publicly disclosed, and SOC 2 is listed as in progress (worth weighing for any enterprise evaluation).
Chert
YC P26 (Spring 2026) with backing from YC, Z Fellows, Betafund, LinkedIn fund, and Grafana. Customer logos include Whop, Tour, Symbal, and Vela. Chert is the most transparent provider on Apple platform risk: their homepage describes rotating sending identities, gradual warm-up, and per-identity volume caps. Pricing and documentation are sales-call gated, so self-serve developers will need to book a call before they can build.
Linq
The most enterprise-oriented provider in the field. Series A ($20M led by TQ Ventures, December 2025); customers include Poke, Emergent, Pika, Tomo, and Lindy. Sells iMessage plus RCS, SMS, and Voice with dedicated account management. Pricing is not public and third-party reports cite $500+ setup fees. Linq has publicly documented an Apple account ban incident on their engineering blog, and the CEO has acknowledged Apple platform risk in press interviews. Useful context if you are evaluating an enterprise contract on this category.
Methodology and sources
Pricing and feature data verified August 31, 2026 from each provider's public pricing and documentation pages: Sendblue pricing, Loop Message pricing, Blooio, BlueBubbles FAQ, Claw Messenger pricing, messages.dev pricing, Chert, Linq. Cells marked “Not published” or “Unknown” reflect what the provider does not publicly disclose. Vendor pricing pages change; the matrix above reflects what is published as of the date shown. If something looks wrong, tell us and we will update it.
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