Email that reaches
phone numbers.
Renders like a web app.
Expires like a secret.
Wireless Mail is a communication layer built on top of existing infrastructure — email as transport, phone number as address, web as rendering, any chat app as notification. No new apps. No recipient login. No SMS costs.
Open it here — no login needed: https://wmail.kcubelabs.com/m/abc123… Expires in 7 days · opens in any browser
Dear Anuj Maheshwari,
I hope this message finds you well. We understand your operational challenges around dealer visibility and AI-driven production insights…
Could we schedule a 15-minute call this week?
📅 Book a 15-minute call →Your customers live on WhatsApp.
Your content lives in email.
Teams either dump PDFs into chat (unprofessional, untrackable) or send long emails nobody opens on mobile. Portals require passwords customers refuse to create.
PDF on WhatsApp
Compressed, unbranded, unsecured. No expiry, no open tracking, no structured CTA. Anyone in the group sees it.
Email alone
Strong for compliance, weak for mobile open rates. India's B2B buyers check WhatsApp 12× before email.
Customer portals
High friction. Proposals, invoices, and reports stall at "create account." 60–70% drop at registration.
Send from anywhere.
One secure experience.
Every path generates the same token URL, chat deep link, and mobile-first branded page — on your domain, with your logo. Works with WhatsApp, Signal, Telegram, WeChat, or any app that sends a link. In India, WhatsApp is the default.
Compose
Rich HTML message + attachments + your branding
Token
Unique secure link on wmail.yourdomain.com
Notify
Chat link via WhatsApp, Signal, Telegram, or WeChat — plus optional email
Track
Opened · replied · auto-expires in N days
Vani / Pitch
Generate pitch content → one-click WMail → WhatsApp link in your hand. Sender profile, logo, and CTA pre-filled.
POST /api/wmail/create
In-app compose
Browser UI for any team member. Write, attach files, send — recipient gets a WhatsApp nudge with the secure link.
wmail.kcubelabs.com/compose
The phone number
as universal inbox.
Every person on earth owns a phone number for decades — longer than any email address, any social account, any corporate login. WMail makes the phone number a deliverable address for rich content.
Branded page · Expires on schedule · Full audit trail
In India, WhatsApp is the default delivery channel.
1Operator-grade reach, email-grade cost
SMS charges ₹0.15–0.30 per message. WMail rides email infrastructure — fractions of a paisa per send. Rich content (attachments, branding, CTAs) at SMS unit economics.
2Any CRM or system becomes a WMail sender via API
One POST call from Salesforce, HubSpot, Zoho, or any internal system triggers a branded WMail to a phone number. No email address needed. The phone number is the delivery target.
3Expiry is a compliance feature regulators will mandate
Banks, hospitals, legal firms need messages that self-destruct. WhatsApp can't do it. Email can't do it. WMail does it natively with configurable TTL per message.
4White-label = infrastructure, not product
wmail.hdfc.com · wmail.apollohospitals.com — you're not selling a feature. You're selling the routing layer that sits under their brand.
The only channel that
does all five.
WMail is the only communication channel that simultaneously delivers rich content, reaches phone numbers, supports expiry, requires no app, and is fully trackable.
| Channel | Rich Content | Phone-addressed | Expirable | No App Needed | Trackable |
|---|---|---|---|---|---|
| SMS / Bulk SMS | ✗ | ✓ | ✗ | ✓ | Partial |
| Partial | ✓ | ✗ | ✗ App required | ✗ | |
| ✓ | ✗ Email address | ✗ | ✓ | Partial | |
| Customer portal | ✓ | ✗ | Partial | ✗ Login wall | ✓ |
| ⚡ Wireless Mail | ✓ | ✓ | ✓ | ✓ | ✓ |
Not bulk SMS.
Not another portal.
❌ Without WMail
- Full proposal copy-pasted into WhatsApp chat
- PDF attachments compressed and unread
- Email-only → low mobile engagement
- Force recipient login for every document
- No open tracking, no expiry, no audit trail
- No email address = no delivery path at all
✓ With Wireless Mail
- Short WhatsApp nudge + secure full-page experience
- Branded HTML, logo, signature, attachments, CTA
- Optional parallel email to same recipient
- No recipient login — token URL only, works in any browser
- Configurable TTL · your domain · your audit log
- Phone number is all you need — no email address required
Notify. Deliver. Act.
Across every vertical.
The same pattern — secure page + WhatsApp link + expiry — works across B2B sales, regulated industries, enterprise ops, and consumer services.
Pitch follow-up
Personalised proposal + deck link after discovery call. Rep sees when it's opened.
Soft collections
Statement, EMI reminder, repayment link — compliant, no chat spam.
Reports & prep
Lab results, appointment instructions, pre-visit forms — expiring after consultation.
Secure document send
NDA, notice, contract — delivered to phone, tracked, expires per compliance TTL.
Bill delivery
Bill + payment link — structured, not buried in chat. Delivery confirmed.
Field delivery
POD, job sheet, customer sign-off page delivered to the driver's phone.
Offer & onboarding
Offer letter, policy pack, joining instructions — trackable, no email address needed.
Brochure & payment
Project deck, payment schedule, site visit confirm — sent to buyer's mobile.
Invites & updates
VIP passes, agenda changes, venue maps — secured, scanned on-site.
Citizen notices
Tax notices, permit documents, scheme details — no email address required from citizen.
Fee & circulars
Fee notice, results, event circular to parents' phones — not in a group chat.
Security incidents
Alert + one-click action for employees by mobile number — no email dependency.
Today: sales tool.
Tomorrow: infrastructure.
WMail is positioned to become the external communication layer for enterprises — the same way Twilio became the telephony layer or Resend became the email layer. The moat builds with every white-label deployment.
B2B sales outreach
Sales reps using Vani Pitch send personalised WMails to prospects. One-click from the cockpit.
- Sales team adoption (5–50 users)
- Pitch + WMail + WhatsApp workflow
- Single org domain setup
- Measurable: reply rate vs email alone
Enterprise comms layer
HR, ops, collections, support teams across one enterprise send all external communications via WMail.
- API → any CRM or internal system sends WMails
- Custom TTL per department (legal vs sales)
- Org-wide audit log and compliance export
- White-label: wmail.clientbrand.com
Communication infrastructure
WMail becomes the routing layer that sits between enterprises and their customers — addressable by phone number from any email client on earth.
- Telco / NBFC / hospital white-label at volume
- API-first: any CRM triggers a WMail send
- Regulated-industry compliance module
- Phone number as the universal external inbox
Infrastructure moat
Routing layer — not a feature any org can copy in-house
API moat
Any CRM, sequencer, or internal system becomes a WMail sender — zero migration needed
Compliance moat
Expiry + audit trail = the feature regulators will mandate
White-label moat
Client branding hides the platform — stickiness = existential
Simple packages.
White-label ready.
Setup covers domain, branding, and onboarding. Monthly covers platform and volume. All plans are customisable for your prospect.
Starter
- Custom wmail subdomain
- Company logo & sender identity
- WhatsApp deep links on every send
- 7-day configurable token expiry
- Pitch / Vani integration
Business
- Everything in Starter
- API access for CRM / sequencer integration
- Parallel email delivery
- Sender allowlist & restrictions
- Open + reply tracking dashboard
- Volume-based send pricing
Enterprise
- Full white-label (no powered-by)
- API access + template library
- Per-message configurable TTL
- Compliance audit export
- Dedicated onboarding & support
- Custom routing domain (e.g. @hdfc.wmail)