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Greta.Agency

Build a marketplace
for SaaS.

Built for software-as-a-service companies and B2B software startups.

We build marketplace platforms with listings, roles, payments, and admin tools built in.

Launch both sides of the marketBuilt-in platform fee logicReady to scale listings and users4–10 weeks
The problem

Why SaaS companies struggle with this.

1

No-code tools hitting limits as the product needs more complex logic or data structures

2

Generic app builders that can't handle real multi-tenancy and billing properly

3

Technical debt from a rushed first build that slows every subsequent sprint

4

No clear path from prototype to production without a full rebuild

The solution

How we build it
for SaaS.

No-code tools don't scale into real SaaS products. Custom-built SaaS means proper multi-tenant architecture, billing infrastructure, and a codebase your team can ship features on quickly.

SaaS products need solid technical foundations: multi-tenancy, subscription billing, usage metering, and scalable architecture from the start. Getting these wrong early creates compounding technical debt.

Purpose-built for two-sided dynamics — not a generic CRUD app

Marketplace payments including platform fee logic and seller payouts

Built to validate your model before investing in a large engineering team

Industry context built in — not bolted on

Deliverables

What you get.

01

Two-sided marketplace with buyer and seller flows

02

Listings system with categories, filters, and search

03

Payments with platform fee and payout logic

04

Seller dashboard for managing listings and orders

05

Admin panel for platform operations and moderation

Use cases

What SaaS companies
build with us.

B2B SaaS applications

Build team-based SaaS with workspaces, role-based access, and subscription billing.

API-first SaaS products

Create developer-friendly SaaS with clean APIs, webhooks, and integration capabilities.

Usage-based SaaS platforms

Build products with consumption metering, usage dashboards, and flexible billing models.

Process

How we work.

01

Define the platform model

Map your buyers, sellers, listing types, and transaction or payout logic.

02

Structure the experience

Design discovery, listing creation, transaction, and admin flows.

03

Build the core system

Ship listings, roles, payments, and the marketplace operations layer.

04

Launch and validate

Go live, attract first users on both sides, and validate supply-demand fit.

Ready to build a marketplace for SaaS?

Typical timeline: 4–10 weeks

About this service

What is Build a Marketplace for SaaS?

Build a Marketplace for SaaS means building a marketplace specifically designed around the workflows, compliance expectations, and user needs of software-as-a-service companies and B2B software startups. Unlike generic software or off-the-shelf tools, a custom-built solution gives your team full control over features, data, and the product roadmap — without paying for capabilities you don't need or working around limitations that slow you down.

SaaS products need solid technical foundations: multi-tenancy, subscription billing, usage metering, and scalable architecture from the start. Getting these wrong early creates compounding technical debt.

Why SaaS companies need custom build a marketplace

No-code tools don't scale into real SaaS products. Custom-built SaaS means proper multi-tenant architecture, billing infrastructure, and a codebase your team can ship features on quickly.

Most SaaS teams start with generic tools because they're fast to deploy. But as the business grows, those tools create friction — missing the specific logic, integrations, and workflows that SaaS operations actually need. A custom-built product eliminates that friction permanently.

How long does it take to build?

SaaS MVPs can ship in 4–8 weeks. Products with complex workflows, integrations, or multi-tenant requirements take 8–16 weeks. The timeline depends on scope, the number of user types, and the depth of integrations with existing SaaS systems. A well-scoped project with clear requirements moves significantly faster than one that evolves through the build. We scope tightly before starting so timelines stay predictable.

What does it cost?

SaaS product builds typically range from $8k–$40k for an MVP with auth, billing, and core features. Full enterprise SaaS products require larger investments. The biggest cost drivers are integration complexity, the number of distinct user roles, and whether the product needs to handle regulated data or compliance workflows. We provide a clear scope and fixed-price quote before any work begins.

Custom build vs. off-the-shelf tools

Off-the-shelf tools work well for standard use cases. But SaaS companies often have requirements that generic SaaS tools weren't built for: no-code tools hitting limits as the product needs more complex logic or data structures, generic app builders that can't handle real multi-tenancy and billing properly, or workflows that don't fit the assumptions baked into general-purpose platforms.

A custom-built product gives you:

  • Full ownership — no per-seat fees or platform lock-in
  • Workflows built exactly for how SaaS teams operate
  • Integrations with the tools and data sources you already use
  • A foundation you can extend as your product and team grow

The right time to build custom is when generic tools are creating real friction, costing more in workarounds than a custom build would cost, or blocking product-critical workflows that your SaaS business depends on.

Start your project

Ready to build
for SaaS?

We build marketplace platforms with listings, roles, payments, and admin tools built in. Scoped for software-as-a-service companies and B2B software startups.