Finance Solutions
Billing Professional

Billing & Invoicing Software

DevSimplex builds custom billing and invoicing platforms that automate revenue operations for subscriptions, usage-based, and one-time billing models.

What we offer
Subscription BillingUsage-Based BillingInvoice Automation
View Case Studies
55+
Success Rate
$1B+
Avg Delivery
1+
Projects Delivered
99.99%
Client Retention

Trusted by 200+ businesses worldwide

Our Offerings

End-to-end software solutions tailored to your business needs

Subscription Billing

Automate recurring billing for SaaS and subscriptions.

Features:

  • Recurring invoices
  • Plan management
  • Trial handling
ReactNode.jsPostgreSQL

Usage-Based Billing

Bill customers based on actual usage and consumption.

Features:

  • Metering
  • Usage tracking
  • Tiered pricing
ReactNode.jsPostgreSQL

Invoice Automation

Generate and deliver invoices automatically.

Features:

  • Auto-generation
  • Multi-format delivery
  • Payment links
ReactNode.jsPostgreSQL

Our Process

A systematic approach to quality delivery and successful outcomes

1

01

1-2 weeks

Analyze billing requirements and pricing models.

Deliverables:

  • Pricing analysis
  • Requirements
  • Solution design
2

02

2 weeks

Design billing architecture and workflows.

Deliverables:

  • System design
  • Pricing engine
  • UI/UX
3

03

6-14 weeks

Build billing platform and integrations.

Deliverables:

  • Billing engine
  • Invoice system
  • Integrations
4

04

2 weeks

Deploy and migrate billing data.

Deliverables:

  • Deployed system
  • Data migration
  • Training

Case Studies

Real-world success stories and business impact

Usage-Based Billing Platform

API Company • Technology

Challenge:

Complex usage billing for millions of API calls

Solution:

Custom usage metering and billing platform

Results:

Real-time usage tracking
Automated tiered billing

Tech:

ReactNode.jsPostgreSQL

Client Stories

What our clients say about working with us

"The usage-based billing platform handles millions of transactions flawlessly. Revenue leakage is now zero."
Kevin Park
CTO
APICorp

Frequently Asked Questions

Get expert answers to common questions about our enterprise software development services, process, and pricing.

Yes, we build for tiered, volume, usage-based, hybrid, and custom pricing models.

We implement ASC 606 compliant revenue recognition with deferred revenue tracking.

Still Have Questions?

Get in touch with our team for personalized help.

Ready to Get Started?

Let's discuss how we can help transform your business with finance solutions.