Get Paid Faster
with Smart Invoicing
Create professional invoices in minutes, accept online payments, and automate reminders — the invoicing tool built for freelancers and small businesses.
SB InvoiceFlow Inc.
invoices@company.com
Bill to
Acme Corporation
$2M+
Invoices Sent
50K+
Invoices Created
5K+
Active Users
98%
On-Time Payments
Everything you need to get paid
All the tools a freelancer or small business needs — no spreadsheets, no chasing clients.
Quick Invoice Creation
Create professional invoices in under 2 minutes. Add line items, set tax rates, and send instantly.
Online Payments
Accept card payments directly on invoices via Stripe. Get paid faster with one-click checkout.
Revenue Analytics
Track income trends, outstanding amounts, and client history with beautiful charts.
Auto Reminders
Never chase a payment again. Automatic reminders are sent before and after due dates.
PDF Export
Download or email invoices as beautifully formatted PDFs with your company branding.
Recurring Invoices
Set up weekly, monthly, or yearly auto-billing for retainer clients automatically.
Team Collaboration
Invite team members, assign roles, and run invoice approval workflows for your agency or team.
Developer API & Webhooks
Integrate with your stack using REST API keys and receive real-time webhook events for every action.
Up and running in 3 steps
Create your account
Sign up in 30 seconds. Pick Free, Pro, or Business at signup — no credit card required.
Add a client & build invoice
Add your client's details, line items, tax rate, and payment terms in under 2 minutes.
Send & get paid
Send by email. Clients pay online via Stripe. You get notified the instant payment lands.
Pick a plan at signup — upgrade or downgrade anytime.
Simple, transparent pricing
No hidden fees. Cancel anytime.
Free
Perfect to get started
- 10 invoices / month
- 5 clients
- PDF export
- Basic analytics dashboard
- 150+ currencies
- Two-factor authentication
- Email support
Pro
For growing freelancers
- Up to 500 invoices / month
- Up to 100 clients
- Send invoices by email
- Automated payment reminders
- Recurring invoices (weekly / monthly / yearly)
- Custom branding & company logo
- Stripe online payments
- Priority support
Business
For teams & agencies
- Everything in Pro
- Unlimited invoices & clients
- Team members & roles
- Invoice approval workflow
- Bulk actions & CSV export
- Advanced analytics
- REST API & API keys
- Webhook integrations
- Dedicated support
137 Currencies Supported
Invoice and accept payments in any of 137 currencies — wherever your clients are in the world.
Powered by Stripe · 137 currencies available for invoicing and payments
Built secure from day one
Your data and your clients' data are protected at every layer.
Two-Factor Auth (2FA)
OTP-based 2FA on every account. One-time codes protect logins even if a password is compromised.
API Key Auth
Scoped API keys with read/write permissions. Revoke any key instantly from your dashboard.
Signed Webhooks
Every webhook delivery is HMAC-SHA256 signed. Verify the signature on your server before processing.
Secure Sessions
NextAuth-powered sessions with password reset, OTP verification, and secure cookie handling.
Integrate with anything
SB InvoiceFlow ships a full REST API and webhook system so you can connect your CRM, accounting software, or custom automations — no glue code needed.
- REST API v1 with JSON responses
- API keys with read / write scopes
- 10 webhook event types (invoice, payment, client)
- HMAC-SHA256 request signing
- Delivery log + one-click retry in dashboard
- Up to 20 endpoints on Business plan
const crypto = require('crypto');
function verifyWebhook(secret, rawBody, sig) {
const expected = crypto
.createHmac('sha256', secret)
.update(rawBody)
.digest('hex');
return expected === sig;
}
// Express handler
app.post('/webhook', (req, res) => {
const sig = req.headers[
'x-webhook-signature'
];
if (!verifyWebhook(SECRET, req.rawBody, sig))
return res.status(401).send('Invalid');
const { event, data } = req.body;
console.log('Event:', event); // invoice.paid
res.sendStatus(200);
});How we compare
Everything the big tools charge extra for — included from day one.
| Feature | SB InvoiceFlow | FreshBooks | Wave |
|---|---|---|---|
| Free plan | ✓ | — | ✓ |
| Stripe online payments | ✓ | ✓ | ✓ |
| Recurring invoices | ✓ | ✓ | — |
| PDF export | ✓ | ✓ | ✓ |
| Multi-currency (150+) | ✓ | ✓ | — |
| Team members & roles | ✓ | ✓ | — |
| Invoice approval workflow | ✓ | — | — |
| Two-factor auth (2FA) | ✓ | — | — |
| REST API & webhooks | ✓ | ✓ | — |
| Bulk actions & CSV export | ✓ | — | — |
Frequently asked questions
Is the free plan really free forever?
Yes. The Free plan is free forever with no credit card required. You get 10 invoices and 5 clients per month, PDF export, and basic analytics — no trial period, no expiry.
Can I upgrade or downgrade my plan anytime?
Absolutely. You can switch between Free, Pro, and Business at any time from your billing settings. Upgrades take effect immediately; downgrades apply at the next billing cycle.
How do online payments work?
We use Stripe to process card payments. When you send an invoice, your client sees a "Pay Now" button. They pay by card and the funds go directly to your connected Stripe account. You get notified instantly.
What is the invoice approval workflow?
On the Business plan, team members can create invoices that require approval before sending. Admins receive a notification, review the invoice, and approve or reject it with a note — keeping quality control in your team.
How do webhooks work?
Register a URL and choose which events to listen to (e.g. invoice.paid, payment.recorded). We'll POST a signed JSON payload to your URL in real time. You can view the delivery log and retry failed deliveries from your dashboard.
Is my data secure?
Yes. We support two-factor authentication (OTP-based), HMAC-signed webhooks, scoped API keys, and secure session management. All data is stored in a managed PostgreSQL database with encrypted connections.
Can I use my own branding on invoices?
Yes, on the Pro and Business plans you can upload your company logo and set your company name, address, and contact details. These appear on all invoices and PDFs sent to clients.
Ready to get paid faster?
Join thousands of freelancers who use SB InvoiceFlow to run their billing.
Create Free AccountNo credit card required · Free plan forever