How to Build Your Own Assembly
Replace Assembly with a custom build. AI-Powered Client Portal Software
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 29 features at Weekend Project difficulty, expect about One weekend with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Type-safe ORM for complex relational data models
Key Features to Replicate
Top features across 8 categories. See all 29 features
Security(5 features)
Granular security controls including custom magic-link expiry, configurable session timeouts, and admin session management (coming soon)
Searchable record of internal and client user activity for security and compliance (coming soon)
Configure Single Sign-On with your existing identity provider for internal users
Enterprise-grade protection built in from day one with SOC2 and HIPAA compliance
Enforce Multi-Factor Authentication for all internal users and clients
Customization(3 features)
Host your client portal on a branded subdomain (e.g., portal.yourcompany.com)
Send notifications from your business email domain instead of default Assembly address
Remove the 'Powered by Assembly' badge on client portal, emails, and workflows
Access Control(2 features)
Control which clients can access an app based on custom field rules for different service levels
Specify which internal users can access and view specific clients and their data
Developer(2 features)
Create API keys and configure webhooks for custom integrations
Web applications embedded into Assembly via iframe with user authentication, API access, webhooks, and navigation
AI(1 features)
Copilot for smarter client interactions powered by AI
Automation(1 features)
Automate the client onboarding process
Billing(1 features)
Send invoices, create subscriptions, and enable 1-click payments with low payment processing fees
Client Management(1 features)
Each client can belong to up to 30 entities under one login
Cost Calculator
Keep Paying Assembly
Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 29 features at very easy complexity.