Custom SaaS platforms
Your SaaS product, from MVP to scale, delivered turnkey.
Full SaaS product development: authentication, Stripe billing, dashboards, public API, GDPR compliance. Functional MVP in 8 weeks, ready to receive your first paying users.
Launching a SaaS means solving 50 problems in parallel: multi-role auth, subscription payment, free trial management, compliant invoices, user AND admin dashboards, documented API, monitoring, security, compliance, internationalization. Most founders waste 6 to 12 months re-implementing these basic bricks instead of focusing on their unique business value.
Our approach: a functional MVP in 8 weeks, built on a modern proven stack (TypeScript + Postgres or edge SQLite, Cloudflare Workers or Node.js, Tailwind UI). We don't reinvent the wheel: auth via Clerk or Auth.js (Google/Microsoft/GitHub SSO included), billing via Stripe with subscriptions/trials/coupons/VAT invoices, transactional emails via Resend, monitoring via Sentry, global edge deployment via Cloudflare Workers or containers OVH/Hetzner. You keep the code, you keep control.
We work for pre-seed startups validating a hypothesis quickly ($15k-30k) as well as established SMBs wanting a vertical B2B product ($50k-150k). Our clients have raised funds after their MVP with us, or signed their first major clients within 3 months post-launch. Code is tested, documented, scalable from day 1 (no spaghetti to refactor in 18 months).
Why choose CrawlWise
- ✓ Functional MVP in 8 weeks, ready to receive your first 100 paying users
- ✓ Modern stack: TypeScript + Postgres/Supabase + Cloudflare Workers or Node.js + Tailwind UI
- ✓ Multi-role auth + Google/Microsoft/GitHub SSO via Clerk or Auth.js (no fragile homemade)
- ✓ Complete Stripe billing: subscriptions, free trials, coupons, country-compliant VAT invoices
- ✓ Separate user dashboard + admin dashboard, analytics, CSV/Excel export
- ✓ Documented public API (OpenAPI/Swagger), rate-limiting, webhooks for client integrations
- ✓ Automated tests (Vitest unit + Playwright e2e), CI/CD, Sentry monitoring included
- ✓ Pre-wired GDPR compliance + SOC 2 ready (encryption, logs, data isolation)
What makes us different
MVP in 8 weeks guaranteed
Not 6 months like most agencies. We achieve this because we don't reinvent auth, billing, transactional email — we assemble proven bricks. You get back time for what matters: finding your first clients.
Code delivered, no lock-in
Private Git repo is in your name from signature. You can leave our agency anytime and continue with any TypeScript developer. Documented stack, standard conventions, no esoteric homemade abstractions.
Scale from day 1
Cloudflare Workers or well-indexed Postgres: we can absorb 10× more users without refactor. No SQLite limited to a single server, no synchronous PHP collapsing at 100 req/s. Long-term thinking architecture.
GDPR + SOC 2 ready compliance
Granular consent, right to erasure, data export, access logs, at-rest and in-transit encryption, client data isolation, documented business continuity plan. Ready for enterprise client audits.
We stay after MVP
Monthly forfait available to iterate post-launch: new features, proactive monitoring, performance optimizations, advanced user support. Not delivery-then-disappear, growth partnership.
Use cases by industry
Vertical B2B SaaS (specific industry)
Business tool for lawyers, accountants, real estate agents, opticians, restaurateurs, transporters. Niche but deep market. Typical pricing: $50-300/month/user. Target: 100-1000 SMBs.
Marketplace as SaaS
Provider + buyer marketplace (services, products, rentals), with commission or subscription pricing model. Stripe Connect for distributed payments, vendor KYC, review moderation, internal messaging.
Data / analytics tools
Business intelligence dashboards for specific sectors (e-commerce, HR, marketing, finance). Source connectors (Stripe, Shopify, Google Ads, Meta Ads, etc.), visualizations, alerts.
AI / productivity SaaS
AI-based tools: specialized content generation, document analysis, automatic qualification. The 2026 market is saturated on general AI, but huge on vertical niches (legal, medical, real estate, recruiting).
Reusable internal SaaS
You developed an internal tool that works well and could offer it to other companies? We industrialize it as commercializable SaaS: multi-tenancy, billing, onboarding, marketing site.
Community / education platform
Online course platform, paid community, mastermind, group coaching. Auth, billing, video (Cloudflare Stream), forum, gamification, certifications.
Our 4-step method
- 1
Product validation
1-day workshop: market-fit, user persona, problem solved, existing alternatives, business model (subscription? commission? freemium?), pricing, minimal MVP. If we detect a deal-breaker risk, we tell you before signing — better for everyone.
- 2
MVP in 8 weeks
2-week sprints, clickable demo at end of each sprint, accessible staging environment. Weeks 1-2: auth + database. Weeks 3-4: core feature 1. Weeks 5-6: core feature 2 + billing. Weeks 7-8: UI polish + production deployment.
- 3
Post-launch iteration
Real user behavior measurement (privacy-first analytics), qualitative feedback via interviews, prioritized adjustments based on data. No blind feature adding — each addition must serve a measurable business goal.
- 4
Scale
Performance (cache, CDN, optimized DB queries), security (pentest audit, SOC 2 compliance if necessary), internal team (developer recruitment, knowledge transfer). At this stage, you can take over completely or continue with us as preferred.
Pricing and packages
MVP
From €15,000 / $16,500
Functional MVP in 8 weeks: auth, Stripe billing, user + admin dashboard, 3-5 main features, production deployment, monitoring. Ideal to validate market hypothesis and sign first 100 clients.
Complete SaaS
From €30,000 / $33,000
Complete platform: MVP + advanced features (multi-tenancy, teams, fine roles, third-party integrations, public API, mobile PWA app, internationalization 3-5 languages). Delivery 16-20 weeks.
Scale and evolution
From €2,500/month
Post-delivery forfait: new features, perf optimizations, proactive monitoring, advanced user support, compliance (SOC 2, ISO 27001 if requested). Minimum 6 months engagement.
Frequently asked
What's the budget for a SaaS MVP?
From €15,000 for a functional MVP in 8 weeks with auth, billing, dashboards and 3-5 main features. Cost grows with business complexity (specific algorithms, numerous third-party integrations, compliance requirements).
8 weeks, really? Not 6 months?
Yes, 8 weeks for a functional MVP testable by real paying users. Possible because we don't reinvent auth (Clerk/Auth.js), billing (Stripe), email (Resend), deployment (Cloudflare). We assemble proven bricks + we develop your unique business value. Usual 6 months often comes from re-developing things that already exist.
Do I own the source code?
Yes, from day 1. Private Git repo (GitHub, GitLab, Bitbucket or self-hosted Gitea) is in your name. You can leave our agency anytime and continue with any TypeScript developer.
Tech stack?
TypeScript everywhere (front + back), React or Solid for front, Cloudflare Workers or Node.js for back, Postgres (Supabase) or D1 (Cloudflare) for DB, modern UI framework, Stripe for billing, Resend for email, Sentry for monitoring. Stable stack, large community, easy hiring.
Hosting and operational costs?
Cloudflare Workers: $5/month for 10M requests (largely sufficient for <10,000 users). Supabase Pro: $25/month. Stripe: 1.4-2.9% per transaction depending on country. Resend: $20/month for 50k emails. Sentry: free up to 5k errors/month. Typical total for 1000 paying users: $100-200/month.
GDPR compliance?
Pre-wired: explicit consent on signup, right to erasure (account + associated data deletion), data export (CSV/JSON), processing register provided, EU hosting possible (Supabase Frankfurt, OVH Strasbourg, Hetzner Helsinki), DPA signable with subprocessors. Ready for CNIL or other DPA audit.
Scalable?
Yes, from day 1. Cloudflare Workers scales automatically (millions of requests/second). Well-indexed Postgres: 10,000-100,000 users without issue. Beyond that, we add sharding or migrate specific components. No bad architectural surprises at 6-12 months.
Do you handle marketing too?
Pure marketing (ads, growth hacking, content marketing) is not our specialty. But we build 'foundation marketing': conversion landing page, perfect technical SEO, analytics integration, A/B testing, optimized transactional email. For active marketing, we work with partners (recommendations possible).
And if I want to internalize a dev team later?
Excellent — we facilitate the transition. Complete technical documentation, pair programming sessions with your new senior dev, code reviews of their first contributions. Standard stack (TypeScript + React + Postgres) = easy hiring, no need for esoteric profiles.
Do you accept staged payments?
Yes for projects > €10,000. Typical schedule: 25% on signature, 25% mid-project (mockup validation + auth+billing in place), 25% on MVP delivery, 25% at 30 days post-launch (real usage validation).
Ready to start your project?
Let's chat for 30 minutes — we'll send a clear quote within 24h.