SaaS Development Agency
Multi-tenant platforms built for growth. For 20 years, Coalesce has helped companies build SaaS products that scale from first customer to thousands without architectural rewrites.
Since 2006
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$125M+ client revenue supported
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4+ year avg. client relationship
SaaS is a business model and an architecture pattern. Get the architecture wrong and you'll hit walls. Tenant isolation, subscription billing, usage metering, onboarding flows. We've built these systems before and know where the complexity hides.
When you're building software as a service
SaaS products have different requirements than custom software. Multi-tenancy, subscription management, self-service onboarding, usage analytics. These patterns are well-established, but implementing them wrong creates technical debt that's expensive to fix later.
Multi-tenancy is harder than it looks.
How do you isolate customer data? How do you handle custom configurations per tenant? How do you price based on usage? These decisions affect everything downstream. We help you get them right from the start.
Your billing system is part of your product.
Subscription management, usage metering, invoicing, dunning. These aren't afterthoughts. They're core product features that affect customer experience and revenue recognition. We integrate billing that works.
You need to ship features, not infrastructure.
Every hour spent on deployment pipelines, monitoring, and scaling is an hour not spent on product. We set up infrastructure that gets out of your way so you can focus on what makes your product valuable.
Services
Multi-Tenant Architecture
Database design, tenant isolation patterns, and configuration management that scales securely from one customer to thousands.
Subscription & Billing Integration
Stripe, Chargebee, or custom billing systems with metering, invoicing, and revenue recognition that actually works.
Self-Service Onboarding
Sign-up flows, trial experiences, and activation sequences that convert visitors to paying customers without sales intervention.
Admin & Customer Success Tools
Internal dashboards for managing tenants, monitoring usage, handling support, and understanding customer behavior.
API & Integration Layer
Public APIs, webhooks, and third-party integrations that let customers connect your product to their existing tools.
Infrastructure & DevOps
CI/CD pipelines, auto-scaling, monitoring, and security best practices so you can ship confidently and sleep at night.
Process
1. Discovery
We start by understanding your business: goals, constraints, existing systems (if any), and what success looks like. No 200-page audits.
2. Strategy
A prioritized roadmap based on your constraints. What's urgent vs. important. What we can ship in weeks vs. what needs architectural work. Clear trade-offs, not hand-wavy estimates.
3. Build
AI-augmented development with human review at every decision point. Whether we're starting fresh or working in your existing stack, you get senior engineers. No handoffs.
4. Launch
QA, deployment, and monitoring. We don't ship and disappear.
5. Iterate
Ongoing partnership, not a handoff. We stick around to make it better.
Recent Case Studies
Coalesce brought a rigorous development approach, meticulous attention to detail, and creative suggestions to the process. The team was clearly invested in the project's success and has become a trusted, valuable collaborator.
Morgan Brown
Inman News
FAQ
What's your experience with SaaS products?
We've built SaaS platforms across industries including real estate, education, financial services, and media. We understand the patterns: multi-tenancy, subscription billing, usage metering, and the operational complexity that comes with them.
How do you handle multi-tenant data isolation?
It depends on your requirements. We've implemented shared-database with row-level security, schema-per-tenant, and database-per-tenant patterns. We'll recommend the right approach based on your compliance needs, scale expectations, and budget.
Which billing platforms do you integrate with?
We have deep experience with Stripe and Chargebee, and can integrate with other platforms as needed. We handle subscription management, usage-based billing, invoicing, and dunning flows.
Can you build both the product and the marketing site?
Yes. We build end-to-end: marketing site, application, admin tools, and the infrastructure to run it all. Having one team own the full stack means fewer handoffs and faster iteration.
Where is your team located?
We're headquartered in New York City, with senior engineers across the Americas and Europe. Our distributed team means faster turnaround without sacrificing quality or communication.
How do you price SaaS development?
Most SaaS builds start with a discovery phase, then move into monthly retainers for ongoing development. SaaS products are never "done." We partner with teams who want a long-term engineering relationship, not a one-time build.
Ready to build a SaaS product that scales?
We support $125M+ of client revenue annually with a lean team of senior engineers. Let's talk about what you're building.