One brand · four products · in production
Software for small business.
4-Square is a SaaS suite — billing, WhatsApp broadcasts, money management, and a developer API. One brand. One bill. Built to last.
Billing
SaaS · Flagship
Bulk
WhatsApp · Desktop
Money
Personal · Offline
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API
For developers
1,247 businesses · ₹3.8L invoices/day
Made in India
GST-ready
₹ pricing
99.9% uptime
1,200+ businesses
01 · The suite
Four apps. Pick what you need.
Billing is our flagship SaaS. The other three solve specific jobs — buy them as you grow, or use the API to wire your own.
01
Invoicing & GST
4square·Billing
Full SaaS ERP for shops & traders. 52 features, GST-ready, 3-month free trial.
Tour Billing →
02
WhatsApp at scale
4square·Bulk
Connect WhatsApp Web, send templated broadcasts to your customer list. One-time license.
See how →
03
Personal finance
4square·Money
Track every rupee — accounts, EMIs, debts, credits. Local-first, your data never leaves the device.
Why local-first →
04
For developers
4square·API
REST endpoints for invoicing, payments, GST. Build your own integrations and resellers' tools.
Read docs →
02 · How it works
Sign up to first invoice in 20 minutes.
Built for shop owners who don't have an IT team. No card to start. No imports needed. No learning curve to dread.
Register with PAN
Enter your business PAN, phone, and a password. We give you a Company ID like 4S2026A0421.
Add your items
Type or paste your top 20 items with prices. Or skip — you can add as you bill. Inventory is optional.
Bill your first customer
Click "New invoice", search the item, hit print. Done in 60 seconds. WhatsApp share is one tap.
Add the other tools
When you're ready, add Bulk for broadcasts, Money for personal cash, API for integrations.
03 · Get in touch
We answer on WhatsApp.
Real humans, in IST hours. Most replies under 30 minutes. No tickets, no ivr.
Talk to us
W
WhatsApp · Fastest
+91 98765 43210
@
Email
noreply@4square.in
T
Telegram channel
@4_square_in
IST 9am–9pm
Hindi · English
~30 min reply
Quick message
Start with the 3-month free trial.
No credit card. Full access to Billing. Add the other products as you grow.