Private beta · invite-only · public launch January 2027
InboxOS
Private beta · Internal use only

Send. Track.
Delight.

InboxOS is a Cloudflare-native transactional email API. Sub-50ms sends, DKIM/SPF/DMARC verified, open & click tracking built-in.

Request beta accessView docs

Closed beta · invite-only access for early partners until Jan 2027

request
12k
Team conversations
4.8x
Faster reply time
98%
Revenue visibility
24/7
Realtime inbox updates
Features

Everything your revenue team needs.

Designed for small teams that want a smarter inbox, better follow-up, and a pipeline that actually converts.

Unified customer inbox

Combine WhatsApp, email, chat, and social messages into one thread-centric workspace for fast response and context.

Pipeline-driven deals

Turn conversations into pipeline opportunities, move stages with drag-friendly boards, and track close probability.

Secure team control

Workspace roles, audit-ready activity trails, and domain protection keep your customer data safe as your team scales.

Smart automation

Auto-assign conversations, follow up on SLA breaches, and trigger workflows when a lead shows buying intent.

Contact intelligence

Resolve identities across channels, enrich profiles, and get a complete view of customer history in one place.

Revenue analytics

Measure response time, deal velocity, and team performance with dashboards built for revenue operations.

Quick start

Get started in 3 steps.

01

Create account

Sign up and get an API key in 60 seconds. No approval needed, no setup calls.

02

Verify your domain

Follow our built-in DKIM/SPF/DMARC guide. Copy-paste DNS records — we verify automatically.

03

Send emails

One POST request to /v1/send. That's it. Scale to millions with the same API.

API

The simplest email API.

One endpoint. Full power. Works with any language, framework, or runtime.

send-email.http
POST https://api.inboxos.dev/v1/send
Authorization: Bearer ik_live_your_api_key
Content-Type: application/json
{
"to": "alex@example.com",
"from": "hello@yourapp.com",
"subject": "Your invoice is ready",
"template": "invoice_ready",
"vars": {
"name": "Alex",
"invoice_id": "INV-2026-0042",
"amount": "$149.00",
"due_date": "2026-05-30"
},
"track_opens": true,
"track_clicks": true
}
Pricing

Simple, predictable pricing.

No per-seat pricing. No hidden fees. Pay for what you send.

Free
$0/mo

Perfect for side projects and testing.

  • 500 emails / month
  • 1 verified domain
  • Basic delivery analytics
  • DKIM/SPF/DMARC setup
  • API access
  • Community support
Start free
Most popular
Pro
$19/mo

For growing products that need reliability.

  • 25,000 emails / month
  • 10 verified domains
  • Open & click tracking
  • AI template generation
  • Contact lists & suppression
  • Webhooks & real-time events
  • Priority email support
Get started
Scale
$79/mo

For teams sending at serious volume.

  • 200,000 emails / month
  • Unlimited domains
  • Email scheduling
  • Advanced analytics & exports
  • MCP + AI agent tools
  • Dedicated IP (add-on)
  • Dedicated support
Get started
Closed beta

Join the early-access list.

We're building InboxOS in the open with a small group of design partners. Public launch is January 2027 — drop your email and we'll let you know when your slot opens up.

Currently used internally · Public launch January 2027