B2B Software Development Agency
Custom partner portals, client portals, ERPs and B2B SaaS with complex integrations, built and supported by one team.
Software Built for How B2B Works
Multiple roles, client accounts, approvals and integrations, designed around your real business processes.
Orders, tracking, documents and accounts online.
Carriers, payments, CRMs, accounting and AI.
Multi-tenant platforms and operations systems.
Custom Software for B2B Companies
Self-service ordering, tracking and documents.
Onboarding, pricing and orders for your partners.
Subscriptions, client accounts and role-based access.
Orders, operations, warehouses and finance connected.
REST and GraphQL APIs and third-party connections.
Maintenance, monitoring and new features.
Work with a B2B Software Development Team
We have built a live courier ERP with client portal and an enterprise SaaS with 10 role-based portals. Tell us about your platform and get a clear plan and quote.
Built for Complex Business Operations
B2B platforms run core business processes every day, so we build them to be reliable, secure and easy to extend:
Proven in Production
Our Stallionex courier ERP runs live operations every day.
Secure by Design
Role-based access, audit trails and secure APIs.
Ready to Scale
Cloud architecture on Azure or AWS that grows with your clients.
Why Choose Three Circle as Your B2B Software Development Agency?
We combine real B2B platform experience with strong engineering in .NET, Node.js, Python and React, so your software fits how your business and your clients actually work.
Real B2B Experience:
Courier ERP, enterprise SaaS and multi-branch platforms.
Integration Expertise:
FedEx, DHL, TCS and M&P carrier APIs, payments and AI.
Continuous Support:
Maintenance and improvements after launch.
Full Team:
Architects, developers, designers and QA in one team.
Transparent Pricing:
From $35/hr, with projects starting from $1,000.
Reliable Delivery
Clear milestones and two-week demos.
B2B Software Development Services We Offer
B2B software has different needs from consumer apps: several user roles, approval workflows, contracts and pricing per client, and integrations with the systems your partners and customers already use. Three Circle is a B2B software development agency that builds custom portals, ERPs and SaaS platforms for businesses that sell to other businesses.
Partner and Client Portals
Secure portals where clients, resellers or partners place orders, track status, download documents and manage their accounts.
B2B SaaS Platforms
Multi-tenant SaaS products with subscriptions, role-based access and admin dashboards.
ERP and Operations Systems
Custom ERPs that connect orders, operations, warehouses, finance and reporting in one system.
Complex Enterprise Integrations
APIs and integrations with carriers, payment providers, CRMs, accounting tools and AI models.
B2B Ordering and E-commerce
Customer-specific catalogues, pricing, bulk ordering and invoicing. See our e-commerce development services.
Modernising Legacy Systems
Move older business systems to modern, secure platforms step by step. See our .NET migration services.
Key Features of the B2B Platforms We Build
- Role-based access for staff, clients, partners and administrators
- Client accounts with their own users, pricing and permissions
- Approval workflows and audit trails
- Bulk orders, imports and exports
- Automated documents: invoices, labels and reports as PDF
- Secure REST and GraphQL APIs for partners
- Dashboards and reporting for management
- Single sign-on and secure authentication
B2B Case Studies: Portals and Complex Integrations
Stallionex: Courier ERP with Client Portal and Four Carrier Integrations
A courier ERP on ASP.NET Core and SQL Server with order management, automated and bulk dispatch, warehouse operations, returns, a client management portal, automated PDF documents and FedEx, DHL, TCS and M&P integrations. Result: live in production and used daily. Read the case study.
CannAvance: Enterprise SaaS with 10 Role-Based Portals
An enterprise healthcare and cannabis SaaS with 10 role-based portals, AI workflows and microservices, built with React, Python, .NET and GraphQL. Read the case study.
Grant Intel: AI SaaS for Businesses
An AI-powered platform that helps businesses discover grants, check eligibility and manage applications, built with Next.js, Python and large language models. Read the case study.
Multi-Branch Restaurant Ordering and POS Platform
One platform for online ordering, POS, menus, payments and inventory, used by 5+ restaurants with 50+ daily orders per branch. Read the case study.
Planning a B2B platform? Book a free 30-minute call.
Our B2B Software Development Process
- Discovery: your users and roles, workflows, integrations and current systems.
- Architecture: data model, permissions, APIs and hosting on Azure or AWS.
- UX/UI design: clear screens for busy business users.
- Agile development: two-week sprints with working demos.
- Testing and security: functional, integration and security testing.
- Launch and support: data migration, training, maintenance and new features.
Technology We Use for B2B Software
- Back end: ASP.NET Core, Node.js, Python
- Front end: React, Next.js, Angular
- Databases: SQL Server, PostgreSQL
- APIs: REST and GraphQL, microservices
- Cloud: Azure and AWS
- AI: large language models for search, document processing and automation
B2B Software Development Engagement Models and Pricing
Choose the way of working that fits your budget and timeline:
Fixed-Price Projects
Best for MVPs and projects with a clear scope. You agree on price, timeline and features before development starts.
Time and Materials
Flexible for products that will evolve. You pay for actual development time and can change priorities after every sprint.
Hire Dedicated B2B Developers
Add experienced developers with B2B platform experience, designers and QA engineers to your team on a monthly basis for long-term development.
Want a quick budget? Use our app development cost calculator or request a free estimate.
Ready to Build Your B2B Platform?
Book a free call and get a clear plan for your portal, ERP or B2B SaaS.
- FAQs
Frequently Asked Questions
Building software for businesses that sell to or work with other businesses, such as client portals, partner portals, ERPs and B2B SaaS platforms.
Yes. We build secure portals where clients and partners place orders, track status, download documents and manage their accounts, as in our Stallionex courier ERP.
It depends on the roles, workflows and integrations. Our rates start from $35 per hour and projects start from $1,000. Book a free call for an estimate.
A focused client portal can launch in a few months; a full ERP or SaaS platform is usually built and released in phases.
Yes. We have integrated carrier APIs such as FedEx and DHL, payment providers and AI models, and we connect CRMs, accounting tools and other systems through their APIs.
Yes. We build SaaS platforms with separate client accounts, role-based access and subscriptions.
Role-based access, audit trails, encrypted connections, secure authentication and regular security testing.
Yes. We provide maintenance, monitoring, updates and new features as your business grows.