Linq's Blue API is an enterprise iMessage, RCS, and SMS platform behind a sales process; Dial is a self-serve communication stack for AI agents with published pricing. Feature depth, channels, and onboarding compared.
TL;DR
Linq (the Linq Blue API, linqapp.com) is the enterprise heavyweight of iMessage: the richest feature set on the market — group chats, reactions, message effects, even interactive iMessage Apps — SOC 2 Type II, a $20M Series A, and marquee AI-assistant customers. What it isn't is self-serve: production access runs through a sales process and pricing isn't published. Dial takes the opposite path — published rates, a number live in about 10 seconds, and an agent identity spanning iMessage, voice, SMS, and WhatsApp. Consumer-scale iMessage deployments with negotiating leverage should talk to Linq; teams that want their agent texting this afternoon should start with Dial.
| Dial | Linq | |
|---|---|---|
| What it is | Communication stack for AI agents — number, voice, SMS, WhatsApp, iMessage in one API | Enterprise iMessage, RCS, and SMS API (Linq Blue) |
| Pricing | Published — $250/mo iMessage number, $3/mo SMS numbers, $0.13–0.22/min voice | Not published — free sandbox, then custom enterprise pricing via sales |
| Time to production | ~10 seconds — self-serve; the agent can provision itself | Sales-led onboarding |
| iMessage feature depth | Send/receive, media, cold outbound, automatic RCS/SMS fallback | Group chats, reactions, effects, read receipts, threading, iMessage Apps |
| RCS | Automatic fallback on iMessage numbers | First-class channel with protocol selection |
| Voice calls | Built-in AI voice — $0.13–0.22/min | Not natively supported (per Linq's FAQ) |
| Included — same identity, 180+ countries | Not offered | |
| MCP server | Remote MCP with OAuth — direct phone tools; agents can self-provision | npx dev tool — sandboxed SDK code execution + docs search |
| SDKs | Node, Python + LangChain, Vercel AI SDK, CrewAI, AutoGen, MS Agent Framework | TypeScript, Python + CLI with webhook listener |
| Free tier | $5 credit, no credit card | Free sandbox |
| Compliance | No paid gates on core platform features | SOC 2 Type II |
Based on each product's public documentation and published pricing as of July 5, 2026. Spotted something out of date? Email [email protected] and we'll fix it.
Linq (linqapp.com — the "Linq Blue" Partner API, from the company that began with Linq digital business cards) offers iMessage, RCS, and SMS through one enterprise API. Its iMessage feature depth is unmatched: group chats with participant controls, tapbacks and custom emoji reactions, message effects, read receipts, threading, media up to 100MB, and interactive "iMessage Apps" rendered inside a thread. It's SOC 2 Type II, ships TypeScript and Python SDKs plus a CLI with a webhook listener, and raised a $20M Series A in February 2026 on the strength of AI assistants like Poke. Pricing isn't published — there's a free sandbox, and production onboarding runs through sales. Voice calling isn't natively supported (per Linq's own FAQ), there's no WhatsApp, and its npx MCP server is a developer tool — sandboxed code execution against the Linq SDK plus docs search — rather than direct phone tools.
Dial is the communication stack for AI agents: provision a real phone number in about 10 seconds and your agent can place and receive voice calls, send and receive SMS in 200+ countries, message on WhatsApp, and reach iMessage with automatic RCS/SMS fallback — all through one REST API, CLI, or MCP server. Pricing is all-in: $3/month per number pay-as-you-go (or $20/month flat-rate with US calls and SMS included), $0.13/min for calls with your own LLM, $0.22/min fully managed. $5 free credit, no credit card.
If the product you're building lives inside an iMessage thread, Linq has the deepest toolbox anyone offers: group chats with participant controls, tapbacks and custom emoji reactions, message effects, read receipts, threaded replies, 100MB media — and since June 2026, interactive iMessage Apps that render tappable cards (payments, tickets) inside the conversation. The traction is real too: a $20M Series A in February 2026, tens of millions of messages a month, and consumer AI assistants like Poke running on it.
For a consumer-scale assistant whose entire UX is the blue bubble, with an enterprise contract negotiated to match, Linq is the strongest specialized option on the market.
The trade for that depth is the front door. Linq publishes no pricing; you start in a free sandbox and production access runs through a sales process. That's a rational enterprise motion — and a poor fit for how agent infrastructure gets adopted, where the developer (or increasingly the agent itself) wants to provision, test, and ship in one sitting.
Dial's front door is the product: dial onboard, a skills.md an agent can read, or the remote MCP server with OAuth — from nothing to a provisioned, message-ready number in about 10 seconds, at rates published on the pricing page. An autonomous agent can't take a sales call; on Dial it doesn't need to.
Linq goes deep on one surface: iMessage, RCS, and SMS through one API. Voice calling isn't natively supported — Linq's own FAQ says so, for outbound and inbound alike — and WhatsApp isn't offered at all.
Dial goes broad with one identity: iMessage (with automatic RCS/SMS fallback), built-in AI voice calls, SMS to 200+ countries, and WhatsApp in 180+. If your agent's job never leaves the thread, depth wins. If it needs to place a call, wait for an OTP, or follow up on WhatsApp — the channels where most real-world workflows end up — breadth is the difference between one vendor and three.
A practical difference for anyone evaluating: every Dial price in this comparison is published at getdial.ai/pricing, and $5 of free credit (no card) buys a real proof of concept. Linq's costs, terms, and voice capabilities have to be established through its sales process — its sandbox is free, so the honest evaluation is to run both sandboxes against your actual workload and compare the quotes you get with the rates you can already see.
Where facts about Linq weren't publicly documented, this page says so rather than repeating third-party numbers — check both vendors directly before deciding.
Linq Blue is Linq's enterprise API for iMessage, RCS, and SMS (linqapp.com). Dial is an alternative when what you need is an agent that can message on iMessage as part of a broader identity — Dial adds built-in AI voice, SMS to 200+ countries, and WhatsApp, with self-serve onboarding and published pricing where Linq is sales-led.
Linq doesn't publish pricing — there's a free sandbox, and production terms come through its sales process. Dial's rates are public: $250/month for an iMessage number with free messages, $3/month standard numbers, $0.02 US SMS, and $0.13–0.22/min voice.
No — Linq's own FAQ states voice calling isn't natively supported (outbound or inbound), and WhatsApp isn't offered. Dial has built-in AI voice calls at $0.13–0.22/min and WhatsApp in 180+ countries on the same agent identity.
Yes — an npx-installable MCP server for Claude Desktop, Claude Code, Cursor, and Windsurf, exposing two developer tools: sandboxed TypeScript execution against the Linq SDK, and documentation search. Dial's remote MCP server (OAuth) exposes the phone itself as tools — send messages, place AI voice calls, wait for inbound events, and provision numbers directly from any MCP client.
It depends on the agent. A consumer assistant living entirely in iMessage threads at negotiated enterprise scale plays to Linq's depth — effects, group chats, iMessage Apps. An autonomous agent that needs to self-provision, call, text internationally, and reach WhatsApp — with costs known upfront — is what Dial is built for.
Voice, SMS, WhatsApp, and iMessage through one API. $5 free credit, no credit card required.