inboxPLUS.ai helps small businesses collect subscribers, write good-looking emails with built-in AI, send them to the right people and see who opened and clicked. Use our AI or bring your own, and connect anything through the API.
Free for up to 500 contacts. A real person answers on every plan.
OPENED
AAnaopened “This weekend: it’s back”2 seconds ago
Contacts Segments Signup forms Drag-and-drop builder A/B tests Automations Honest reports AI, ours or yours Open API
Write with our AI, or bring your own
Describe the email you want in plain words. inboxPLUS.ai drafts the subject, the preview text and the body in your voice, then suggests subject lines worth testing. Prefer your own model? Paste your key and every request goes to it instead.
Drafts and rewrites in your tone, with merge tags like a reader’s first name kept intact.
Subject lines to A/B test, ready to send to part of your list first.
Reports in plain words, like “Thursday mornings work best for you.”
Bring your own model with your key, or point it at any compatible endpoint.
inboxPLUS AIOpenAIAnthropicGoogle GeminiMistralYour own endpoint
New email
inboxPLUS AIYour model
SubjectBody
Try: “Back by popular demand”Try: “Your Saturday, sorted”
Plug it into anything
A simple REST API with keys you control. Add subscribers from your shop or app, send an email when something happens, and get opens and clicks back as webhooks.
POST /contactsAdd or update a person, with tags and fields
POST /emailsSend or schedule to a person or a segment
POST /automations/:id/startStart a sequence from your own code
The same jobs the big email tools do, without the lock-in. Every tool below is built and working today.
Contacts
Add people one by one, paste a list or import a CSV. Columns match themselves.
email → Email
fname → First name
bday → Birthday
tags → Tags
Segments
Pick out people by any field, tag, signup date or email activity.
Opened in the last 30 daysand tag is VIP1,284people match
Signup forms
A hosted signup page for your site, your bio or a QR code, with double opt-in.
Join the list
you@email.com
Subscribe
Email builder
Drag-and-drop blocks, saved templates, merge tags, and phone previews.
HeadingTextImageButton
Hi Sam, it’s backOrder now
Send checklist
Plain words for what’s missing, a test to your phone, then send now or schedule.
Sender name and address
Subject and preview text
Domain authenticated
Unsubscribe link in footer
A/B tests
Try two or three subject lines, senders or designs. The winner goes to everyone else.
“Back this Saturday”38%
“Your weekend, sorted”61%
Winner sent to the other 80%
Automations
A welcome series, a birthday note or a renewal reminder that runs on its own.
Honest reports
Opens, clicks, bounces and unsubscribes, counted by people. Machine opens are left out.
46.8% opened9.4% clicked
Team and safety
Roles for your staff, Google sign-in, two-step sign-in and your own sending domain.
Maya Admin
Sam Manager, sends
Jo Author, drafts
Not in the box yet: online-store connections with revenue per email, SMS, and landing pages beyond the signup page.
The plus is the promise
Business owners told us what they hate about the big email tools: locked accounts with no explanation, support behind a paywall, and cancelling made hard. So inboxPLUS.ai is built around three promises.
Export all4,812 contactscontacts.csv, ready in 3 seconds
Your contacts are always reachable
If sending is ever paused, you can still see and export everything, and you’re told exactly why in plain words. Your list is how you talk to your customers. You never lose it.
Maya from support Hi Sam, I’ve looked at your account. Sending is back on, and here’s what happened…Replied in 2 hours · Free plan
A person answers, on every plan
Free included. A reply within one business day, even when you can’t log in. No bots in the way and no support tier to pay for.
Your account, your choice
Cancel planDownload dataClose account
From one emailed link. No login, no phone call.
Leaving takes one link
Cancel, download all your data or close the account from a single emailed link. Stopping billing keeps the time you’ve already paid for.
Your first email in about twenty clicks
Each screen says in plain words what’s missing before anything can go wrong.
1
Create your account
Email or Google. Your business name, address and sender details.
2
Add your contacts
Paste a list or upload a spreadsheet. Columns are matched for you.
3
Authenticate your domain
Copy three records into your domain settings. We check them for you.
4
Write the email
Start from a layout or ask the AI, then preview it on a phone.
5
Send or schedule
The checklist turns green, you send, and the report fills in as people read.
When something is wrong, inboxPLUS.ai says what and how to fix it, like “That looks like an old or bought list: 7% of addresses bounced.” No error codes. A welcome series takes four clicks from a ready-made starter.
Pay for your list, nothing else
You’d be on Essentials at $15 a month, with room for 5,000 people.
