Create remarkable client experiences

Get a branded client portal to manage clients, contracts, and billing in one place. Start for free, no credit card required.

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Built for tech-enabled professional service firms

Client portals used by accounting, real estate, law, marketing, and tech firms to manage more than 1M+ clients.

Meet our customers

Streamline

Centralize

Customize

From clutter to client-favorite

Delight clients with a modern portal to connect, pay, and share files — all in one place.

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Leah McCool
Owner, Orca Accounting
“My clients love the platform, and I love using it. The first step of working together feels effortless, and that creates a powerful first impression.”

Get organized with an AI-powered back office

Your team’s time is money: centralize your visibility into client relationships across your company with secure AI assistance.

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Integrate with your existing tools

Connect your client portal with the tools you already use to streamline workflows and build on a flexible development platform.

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Robert Prochnow
Founder, Zen Aegis
"Assembly saves us from coding a whole portal solution. We implemented a HIPAA-compliant customer portal quickly."

More than just a client portal

Deliver a bespoke client experience with powerful tools — messaging, file-sharing, invoicing, and more — at no extra cost.

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[AI Assistant
Your copilot for smarter client interactions.

[Security
Enterprise-grade protection built in from day one.

Contracts & eSignatures
Streamline document signatures in one place.
Storefronts
Productize your services with eCommerce-style packages.
Invoicing & Billing
Send invoices and create subscriptions with 1-click payments.

Your clients deserve better.

Try for free for 14 days, no credit card required.

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Assembly available in ChatGPT & Claude

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5 stars

250+ reviews