Best Client Portals Software in 2026

Assembly (the client portal, formerly Copilot and originally Portal) builds the nicest-looking branded client experience in the category: messaging, files, contracts, and billing in one hub that feels like a custom app, now with an AI app builder for custom onboarding and dashboard workflows. It is a portal layer, not a full business suite - it integrates with your accounting, scheduling, and project tools rather than replacing them. Since the rebrand there is a free-forever plan and badge removal now starts at $99 Professional; the remaining budget gate is the $499 Advanced tier for audit logs, granular permissions, and HIPAA. There is still no native time tracking or built-in scheduling.