Chert Review (2026): Pricing, Features & Honest Verdict

TLDR

Chert is an iMessage API platform, a ‘Twilio for iMessage,’ that lets GTM teams and AI agents send, receive, and automate real blue-bubble messages at scale with SMS fallback and CRM integrations. The idea is sharp; Apple’s terms are the risk. Best for: GTM and AI-agent teams. Price: Custom, no free plan. Rating: 6.9/10.

What is Chert?

Chert is infrastructure for sending and receiving iMessages programmatically. SMS and RCS have had business APIs for years through providers like Twilio, but iMessage never did. Chert fills that gap. It gives teams an API to send, receive, and automate real blue-bubble iMessages, complete with the native touches people expect: typing indicators, read receipts, tapback reactions, and named group threads. When a contact is not on iMessage, it falls back to SMS or RCS so the message still lands. The pitch is straightforward: reach customers on the channel they actually check, with the trust that a blue bubble carries.

The company is a Y Combinator P26 startup, founded in 2026 and based in Seattle, with backers including Z Fellows and Betafund. We dug into it and the engineering is real: Chert runs genuine Apple software on Mac hardware with authenticated Apple IDs, handles line provisioning and health checks, and scales from a test line to hundreds of lines. It targets go-to-market teams for onboarding, support, cold outbound, and conversational AI agents, with integrations into Salesforce, HubSpot, Attio, Close, Slack, and Vapi. It matters now because AI agents need a high-trust text channel, and iMessage is the one most people read.

What Are Chert’s Key Features?

Real iMessage API with native features

This is the whole point. Chert sends actual blue-bubble iMessages, not SMS dressed up to look like them, with end-to-end encryption and verified delivery. You get the native iMessage experience programmatically: typing indicators, read receipts, tapback reactions, and named multi-recipient group chats. For a customer, a blue bubble reads as a real person on a trusted channel, which is exactly the perception Chert is selling. No mainstream SMS provider offers this cleanly. The read receipts and typing indicators are not just cosmetic either: they let an automated agent feel responsive and human in a way an SMS thread cannot, which is a big part of why the founders claim much higher reply rates than cold email or plain texts.

SMS and RCS fallback

Not everyone is on iMessage, so Chert automatically falls back to SMS or RCS for Android users and anyone outside the Apple ecosystem. That means you can run a single campaign or support flow and trust that every contact gets the message on whatever channel works for them. It removes the obvious objection that an iMessage-only tool would only reach iPhone users, and it means you do not have to maintain a separate SMS pipeline for the contacts iMessage cannot reach.

Line provisioning and delivery telemetry

Chert manages the messy infrastructure underneath: provisioning phone lines, running health checks so lines do not get flagged, and scaling from one test line to hundreds as you grow. It also reports sub-second delivery telemetry per message, so you can see what landed and when. This operational layer is what separates a real platform from a hobbyist Mac-in-a-closet setup, and it is where most of Chert’s engineering effort sits.

CRM and AI-agent integrations

Chert connects to Salesforce, HubSpot, Attio, GoHighLevel, Close, and Slack, and integrates with Vapi for voice and AI agents. That lets you wire iMessage into existing sales and support workflows or stand up an AI agent that books and reschedules appointments over text. For teams building conversational agents, having a high-engagement channel with CRM context attached is the core appeal.

How Much Does Chert Cost?

Chert does not publish pricing. There is no self-serve plan and no public price list; you book a call and get a custom quote based on how many lines and how much message volume you need. The company describes a structure that scales to hundreds of lines and thousands of messages, which signals usage-based, sales-led pricing aimed at teams rather than individuals.

For context, the broader iMessage API market gives a rough benchmark. Sendblue, a direct competitor, charges roughly $100 per line per month with unlimited messages on a dedicated number. LoopMessage prices per message with no monthly fee, which suits low volume. Twilio, the established SMS and RCS provider, charges per message and is cheaper per contact but does not do blue-bubble iMessage at all. Expect Chert to land in the same neighborhood as the dedicated iMessage providers, priced for business use.

The honest takeaway: because pricing is hidden behind a call, you cannot comparison-shop easily, and that friction matters for smaller teams. If budget predictability is important, the per-line or per-message models from Sendblue and LoopMessage are easier to reason about up front. Sales-led pricing also tends to mean the product is aimed at teams spending real money each month, not solo founders testing an idea on a weekend. Treat the call as the cost of entry, and go in knowing your expected line count and monthly volume so the quote is grounded in your actual usage rather than a guess.

Who is Chert Best For?

Use Chert if blue-bubble iMessage is genuinely the right channel for your business and you have the volume to justify sales-led onboarding. Go-to-market teams in home services, DTC, and property management that rely on warm, opt-in conversations are the target. If you are building AI agents that text customers to book, reschedule, or support, and you want them on the channel people actually open, Chert is the cleanest way to get there today.

Skip Chert if you are a small team that wants predictable pricing and a quick self-serve start, or if your audience is mostly on Android. More importantly, skip it if you cannot tolerate platform risk. Apple’s terms say iMessage is for personal use, not commercial activity, and the channel could be shut down the way Beeper Mini was. If a sudden loss of the channel would break your operation, build on SMS or RCS instead.

• Use it if: iMessage is the right channel, you have real volume, and you accept the platform risk.
• Skip it if: you want predictable self-serve pricing, your users are on Android, or you cannot absorb a shutdown.

Best Chert Alternatives

Twilio

Twilio is the established, safe choice for programmatic messaging over SMS and RCS. It does not do blue-bubble iMessage, which is exactly what Chert is built around, but it is battle-tested, has deep documentation, and prices per message so you can start small. Pick Twilio when you want a reliable, low-risk text channel with no dependence on Apple’s tolerance, and you are willing to give up the blue-bubble trust signal.

Sendblue

Sendblue is the most direct competitor: another iMessage API for business, priced around $100 per line per month with unlimited messages and SMS fallback. It carries the same underlying Apple-terms risk that Chert does, since both rely on the same approach. The difference is that Sendblue publishes clear per-line pricing and offers self-serve setup, so it is easier to evaluate and start without a sales call. Choose Sendblue if you want an iMessage API with transparent pricing.

LoopMessage

LoopMessage is an iMessage API that charges per message with no monthly fee, which makes it the cheaper option for low or bursty volume. Like the others, it inherits the platform risk of building on iMessage commercially. It is a good fit if you send a modest number of messages and want to pay only for what you use rather than committing to per-line subscriptions. For high or steady volume, the per-line subscription models tend to win on cost over time.

Final Verdict: Is Chert Worth It?

Chert earns its 6.9 because the idea is genuinely good and the execution looks serious. A clean API for real blue-bubble iMessage, with native features, fallback, and CRM integrations, is something the big SMS providers do not offer, and for the right team it unlocks a high-trust, high-response channel. The engineering and the YC backing are real, and AI-agent teams in particular have a strong reason to want exactly this.

The reason it is not rated higher is the elephant in the room: Apple. iMessage’s terms forbid commercial use, and the entire category lives at Apple’s discretion. That, plus hidden pricing and a short track record as a 2026 startup, makes Chert a bet rather than a safe choice. If iMessage is clearly your channel and you can stomach the risk, Chert is the best-built option for it. If you need stability and predictable cost, reach for SMS or RCS through Twilio instead.