Sendblue alternative
Sendblue is an iMessage, SMS, and RCS platform you wire into apps, agents, and CRMs. We are a personal assistant you text on a public US and Canada number.
Same channel family. Different job. They sell pipes and lines. We sell the assistant that already works.
This is not a ChatGPT comparison. That post is already written: Why Use AI Chat SMS When You Can Just Use ChatGPT?.
We already compared consumer texting assistants in our Instinct, Homer, and Dunnit pages. Sendblue is a Provider page. Twilio is next.
What Sendblue says
From sendblue.com: iMessage for Business. An agent-first messaging platform. YC-backed. SOC 2 Type II. HIPAA plans available.
The product is a REST API plus sales and CRM workflows. Sign up, provision a number, POST to send. Official Node and Python SDKs, cURL, and a CLI. Webhooks for two-way conversations. Automatic iMessage detection with fallback to RCS, then SMS. They say no A2P registration is required.
Published features include send and receive on iMessage, SMS and MMS with fallback, RCS on V2 lines, reactions, read receipts, typing indicators, group messaging, contact cards, and FaceTime Audio via API when you buy a FaceTime line. Marketing also shows Zapier and CRM hooks for stacks like Salesforce, HubSpot, GoHighLevel, and Close.
Pricing from sendblue.com/pricing: Free Sandbox at $0 with a shared number, full API access, up to 10 verified contacts, inbound-first, CLI and SDK, community support, and no dedicated number, outbound, or webhooks on free. AI Agent at $100 per dedicated line per month, inbound-first, 1,000 inbound contacts a day, webhooks, media, typing, reactions, priority support. They frame $0 per-message fees, $0 A2P, $0 carrier surcharges, and $0 SMS fallback fees on that plan. Enterprise is custom and volume-based, with full outbound, multiple lines, SOC 2 and HIPAA, and a dedicated account manager.
They also sell a sales-team story: shared inbox, AI-assisted follow-ups, power dialer, workflow builder. Still infrastructure you operate. Not a consumer personal assistant with a public number for reminders and briefs.
We are not going to publish any of their phone numbers. Link the site. Keep the logo. Their docs use example digits for samples. Those stay off this page.
What you get if you text us
A public number. (305) 588-2170. US and Canada. Native Messages. No app. Fifty free messages. No account or card to start.
On iPhone and Mac you get real iMessage blue bubbles. Android and other phones get SMS or RCS through the carrier.
Remind me Friday at 9am to invoice Acme
Got it. I'll text you Friday at 9:00 AM to invoice Acme.
Brief me on AI chip news every weekday at 8
Set. Weekday AI chip brief at 8:00 AM.
Reminders arrive as texts. Daily briefings on any topic you pick. Long-term memory across conversations. Web search. /image. Personas with /mode. Bookmarks with /save. Photo analysis. Quick actions like /weather, /math, and /translate.
Connect Gmail, Google Calendar, Google Docs, Google Sheets, and Outlook. Text /connect gmail or /connect calendar, or just ask. You get an OAuth link you control.
We are the end product. We do not sell an iMessage API. We do not provision lines for your app. We do not ship FaceTime Audio APIs or SOC 2 and HIPAA messaging pipes.
After the free messages, Unlimited is $15 a month (100 a day, 2,000 a month fair use), or pay-as-you-go packs from $10.
Side by side
| AI Chat SMS | Sendblue | |
|---|---|---|
| Availability | Today. Public number (305) 588-2170. US and Canada. | Today. Sign up at sendblue.com. Free sandbox, then dedicated lines. |
| Price | 50 free messages. No card to start. Then unlimited at $15/month, or pay as you go from $10. | Free sandbox (shared number, 10 verified contacts). AI Agent $100/line/month. Enterprise custom. |
| Product | Built-for-you personal AI assistant in Messages. | iMessage / SMS / RCS API and sales messaging platform you assemble. |
| Who it is for | People who want to text an assistant. | Developers, AI-agent builders, and sales teams wiring messaging into apps or CRMs. |
| Reminders | Yes. They arrive as texts. | You build them with the API and webhooks. Not a consumer reminder product. |
| Memory | Yes. Long-term across conversations. | Not published as a consumer memory product. You store your own state. |
| Briefings | Yes. Daily briefs on any topic you pick. | Not published. You build the agent that sends messages. |
| Gmail | Yes. /connect gmail. | CRM and automation integrations for business workflows. Not a personal Gmail assistant. |
| Google Calendar | Yes. /connect calendar. | Same story: integrate your stack. Not a personal calendar texting assistant. |
| Docs, Sheets, Outlook | Yes. Same /connect list. | Not the same consumer connect story. Their published stack is CRM, Zapier, and agent APIs. |
| Native iMessage API / SDKs | No. We are the end product. | Yes. REST API, Node/Python SDKs, CLI, webhooks. Core pitch. |
| Lines you provision | No. One public consumer number. | Yes. Dedicated lines from $100/month on AI Agent. |
| Sales inbox / CRM dialer | No. | Yes. Shared inbox, workflows, CRM hooks on their marketing. |
| Image gen / personas | Yes. /image and /mode. | Not published as consumer features. |
| Compliance marketing | Not our page claim. | SOC 2 Type II. HIPAA plans available (their site). |
Where Sendblue wins
Programmable native iMessage for an app, agent, or sales team. Lines, SDKs, webhooks, CRM hooks, and compliance plans. If you need that pipe, they built it. We did not.
Where we win
Fifty free messages and $15 unlimited. A public US and Canada number you can save today. No SDK. No line to provision. No webhook to wire.
Reminders, any-topic briefs, memory, personas, and /image in one consumer thread. Gmail, Calendar, Docs, Sheets, and Outlook on /connect.
Which one you want
Building messaging infrastructure? That is Sendblue.
Want a broad assistant in Messages you can start today with 50 free texts? That is us.
Text it today
No download.
Text (305) 588-2170. Fifty free messages. US and Canada. Standard message rates apply.
Ready to text your AI?
No app to download. Text us to start — one tap opens Messages with our number. 50 free messages to start.
Text (305) 588-2170
US & Canada only. Standard message rates apply.