Build a client portal
for B2B SaaS.
Built for B2B software-as-a-service companies and team-based software startups.
We build client portals that give your clients a clean, branded space for every engagement.
Why B2B SaaS companies
struggle with this.
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
Technical debt from a rushed first build that slows every subsequent sprint
No clear path from prototype to production without a full rebuild
BUILD IT FAST
We solve these problems for B2B SaaS
Greta specializes in client portal that fit B2B SaaS workflows. No generic tools, no compromises.
TALK TO A FOUNDER
Not sure where to start?
Book a 20-minute call. We'll map out your scope, tech stack, and go-to-market plan — for free.
How we build it
for B2B SaaS.
No-code tools don't scale into real SaaS products. Custom-built B2B SaaS means proper multi-tenant architecture, billing infrastructure, and a codebase your team can ship features on quickly without hitting platform limits.
B2B SaaS products need solid technical foundations from the start: multi-tenancy, subscription billing, usage metering, and scalable architecture. Getting these wrong early creates compounding technical debt that slows feature development.
A branded portal your clients can log into anytime
Structured around your delivery workflow and approval process
Reduces back-and-forth by giving clients visibility and control
Industry context built in — not bolted on
What you get.
Branded client-facing portal with secure login
Project and deliverable status tracking
Document sharing and approval workflows
Messaging and notification system
Admin controls for your team to manage client views
What B2B SaaS companies
build with us.
Team-based SaaS applications
Build multi-tenant SaaS with workspaces, role-based access, subscriptions, and team collaboration features.
API-first SaaS products
Create developer-friendly SaaS with clean APIs, webhooks, OAuth, and integration capabilities for ecosystem partners.
Usage-based SaaS platforms
Build products with consumption metering, usage dashboards, flexible billing models, and seat-based pricing.
BUILD IT FAST
Ready to build for B2B SaaS?
Get a client portal scoped, priced, and launched in 3–6 weeks. Let's start with a free conversation.
TALK TO A FOUNDER
Not sure where to start?
Book a 20-minute call. We'll map out your scope, tech stack, and go-to-market plan — for free.
How we work.
Define the client journey
Map what clients need to see, share, and do throughout your engagement.
Structure the portal
Design the layout, access levels, and key features for both clients and your team.
Build the experience
Develop the portal with branding, permissions, and core collaboration features.
Launch with clients
Onboard your first clients and refine based on real usage feedback.
Define the client journey
Map what clients need to see, share, and do throughout your engagement.
Structure the portal
Design the layout, access levels, and key features for both clients and your team.
Build the experience
Develop the portal with branding, permissions, and core collaboration features.
Launch with clients
Onboard your first clients and refine based on real usage feedback.
Ready to build a client portal for B2B SaaS?
Typical timeline: 3–6 weeks
What is Client Portal for B2B SaaS?
Client Portal for B2B SaaS means building a client portal specifically designed around the workflows, compliance expectations, and user needs of B2B software-as-a-service companies and team-based 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.
B2B SaaS products need solid technical foundations from the start: multi-tenancy, subscription billing, usage metering, and scalable architecture. Getting these wrong early creates compounding technical debt that slows feature development.
Why B2B SaaS companies need custom client portal
No-code tools don't scale into real SaaS products. Custom-built B2B SaaS means proper multi-tenant architecture, billing infrastructure, and a codebase your team can ship features on quickly without hitting platform limits.
Most B2B 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 B2B SaaS operations actually need. A custom-built product eliminates that friction permanently.
How long does it take to build?
B2B SaaS MVPs can ship in 5–10 weeks. Products with complex workflows, integrations, or advanced multi-tenant requirements take 10–18 weeks. The timeline depends on scope, the number of user types, and the depth of integrations with existing B2B 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?
B2B SaaS MVP builds typically range from $12k–$45k for an MVP with auth, billing, multi-tenancy, and core features. Adds $5k–$15k per additional integration (Stripe, Slack, etc.). 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 B2B 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 B2B 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 B2B SaaS business depends on.
BUILD IT FAST
From idea to production in 3–6 weeks
Greta's process is proven. We've shipped 50+ B2B SaaS products. See how we can accelerate your timeline.
TALK TO A FOUNDER
Not sure where to start?
Book a 20-minute call. We'll map out your scope, tech stack, and go-to-market plan — for free.
B2B SaaS MVP questions answered
What's the difference between custom B2B SaaS and no-code builders?+
No-code tools are fast but hit ceilings: can't customize multi-tenancy, billing is rigid, performance degrades at scale, you're locked in. Custom B2B SaaS: proper multi-tenant architecture from day one, flexible billing (seats, usage, tiers), ownership of codebase. You scale infinitely without platform limits. Cost: 2x more upfront, 10x cheaper long-term.
How do you handle Stripe billing and subscriptions?+
Stripe integration is standard: recurring subscriptions, usage-based billing (metering), tier changes + proration, payment retries, dunning (failed payment sequences), and customer portal. Hard part: logic around billing — dunning cascades (email → pause → cancel), proration on tier changes, usage calculation accuracy. We build that core logic, not just Stripe API calls.
What's multi-tenancy and why does it matter?+
Multi-tenancy = multiple teams sharing infrastructure with isolated data. Core feature of SaaS that lets you scale without cost explosion. Hard part: row-level security (team A can't see team B's data), audit trails (who accessed what when), and data isolation at database level. Get it wrong early = months of refactoring. We architect it right from day one.
How do you handle user authentication and team management?+
Single sign-on (SSO) for enterprise SaaS, standard email/password for startups. Team management: admins create accounts, assign roles (admin/user/viewer), manage permissions. We support Okta, Auth0, Google SSO for enterprise. Role-based access control (RBAC): different users see different features/data based on role. Built-in.
Can you build B2B SaaS with custom workflows for specific industries?+
Yes. We've built SaaS for marketing agencies (project management, billing), legal firms (case tracking, document management), HR teams (recruiting, onboarding). Custom workflows = custom data models + business logic. Not a generic product database, but designed for your specific industry. Takes longer (10–14 weeks) but results in product-market fit faster.
How much does a B2B SaaS MVP cost?+
Greta's B2B SaaS MVPs: $15K–$45K depending on complexity. Basic SaaS (auth, workspaces, Stripe): $15K–$25K. Mid-tier (custom workflows, reporting dashboards): $25K–$40K. Enterprise-ready (SSO, audit logs, advanced permissions): $40K–$50K. Monthly infrastructure: $200–$1K depending on users.
What integrations do B2B SaaS typically need?+
Common: Stripe (billing), Slack (notifications), Zapier (workflow automation), Salesforce (CRM sync), Calendly (scheduling). Each integration adds 1–2 weeks. We prioritize integrations based on customer requests. API-first design lets you integrate with anything without re-deploying.
How do you ensure security and data privacy in B2B SaaS?+
Encryption at rest (AES-256) and in transit (TLS), audit logging (immutable record of who accessed what), role-based access, SOC 2 compliance for enterprise customers. Data backups (daily), disaster recovery (RTO < 1 hour), and GDPR/CCPA compliance. We don't cut corners on security — it's how we design.
Ready to build
for B2B SaaS?
We build client portals that give your clients a clean, branded space for every engagement. Scoped for B2B software-as-a-service companies and team-based software startups.