Assembly

Assembly is an AI app builder for teams creating authenticated client workflows and internal tools. It is best suited to organizations that want branded client access and platform-managed permissions without building an app from scratch. Its strongest case is combining app creation with a shared client workspace; its limits on contacts, users, and apps make plan choice important.

Overview

Users describe an app in plain language, review Assembly’s proposed plan, publish it, and refine it through conversation. More than 30 templates cover work such as document collection, project tracking, proposals, and client support, giving teams starting points for common workflows. Apps can connect to third-party services through authentication or an API key, and the MCP connector supports workspace analysis and actions through tools including ChatGPT and Claude.

Published apps appear in a branded client experience. Assembly handles client authentication, roles, permissions, and client data scoping at the platform level, rather than leaving those controls to AI-generated apps. The company says its platform is SOC 2 Type II certified, stores customer data in the United States, encrypts it in transit with TLS and at rest with AES-256, and does not use workspace or client data to train AI models. HIPAA support with a BAA is on Advanced, but does not cover AI features.

Assembly is built for authenticated experiences, not public-facing websites, directories, or consumer apps. Teams planning an open-access product should look elsewhere.

Key features

• Conversational app building: Describe a workflow, review a proposed build, then publish and refine it through conversation. This suits teams shaping client processes, though the product’s stated boundary rules out public apps.
• Templates and integrations: More than 30 templates address recurring client and operational tasks. Connections to outside services use authentication or API keys; the MCP connector adds a route for ChatGPT and Claude to analyze the workspace and perform actions.
• Branded client workspace: Clients get a branded experience with published apps grouped in a sidebar, rather than separate unconnected app entry points.
• Platform-managed access: Authentication, roles, permissions, and client data scoping are handled by Assembly. That is a practical advantage for teams managing client information, while teams needing public access are a poor fit.

Pricing

Assembly has a free plan and four paid tiers. The caps on active contacts, internal users, and apps matter as much as the headline price: a growing team may need to move up even if its app-building needs stay the same.

Free is a low-commitment way for one internal user to build up to three apps, but five active contacts sharply constrain client use. Starter raises those caps and adds email support, though it still allows only one internal user and five apps; its $29 a month price requires annual billing, while monthly billing is $49. Professional is the more plausible fit for a small team serving up to 500 active contacts: it allows three internal users and custom domains, but retains the five-app and 200-credit limits. Advanced removes the contact cap and adds controls and HIPAA support, yet still caps the plan at five internal users and five apps. Enterprise is the option for teams needing unlimited users and apps or custom SSO, at custom pricing.

Platforms

Assembly is available on the web, macOS, and Windows. Its desktop app supports Apple silicon and Intel Macs, plus Windows 10 or later 64-bit. Support varies by plan, from community support on Free to email on Starter, priority email on Professional and Advanced, and priority call support on Advanced.

Who it's for

Assembly suits organizations that need authenticated client workflows alongside internal tools, especially when a branded client workspace and platform-level access controls are priorities. It is less compelling for teams that need more than five apps or more internal users than their chosen plan allows, unless Enterprise fits. It is not the right builder for public websites or consumer-facing apps.

Pros and cons

• Pro: Platform-managed authentication, permissions, roles, and client data scoping reduce reliance on AI-generated access controls.
• Pro: Templates, conversational building, and a shared branded client experience bring app creation and client access together.
• Pro: Professional adds custom domains, while Advanced adds an audit log, enforced MFA, and HIPAA support with a BAA.
• Con: Free supports only 5 active contacts and 1 internal user, limiting its usefulness for a live client operation.
• Con: Starter requires annual billing for its $29 a month price; monthly billing is $49.
• Con: Professional and Advanced still cap usage at 5 apps, and AI features are outside HIPAA support.
• Con: The authenticated-product focus excludes public sites, directories, and consumer apps.

Alternatives

• Legal Client Portal Software is a category directory for comparing legal client portal options.
• Customer Portal Software is a category directory for comparing customer portal options.
• 8am MyCase is worth considering for legal case and contact management with time entry, invoicing, and trust-account tools. Its MyCase Basic plan is $50 a month billed annually.
• LawConnect is a better fit for consumers seeking free AI legal information, with lawyer fees potentially applying if they hire a lawyer.
• Filevine suits teams seeking custom-built matter management, document management, billing, and optional intake or other packages, with custom pricing.
• SimpleLaw Document Automation offers a free Law Firm plan to connect with potential leads, and a plan for up to 39 users at $59 a month with annual pricing.
• Jursu has a free plan for 1 team member and 100 MB of document storage, a more constrained starting point for small teams.
• INSZoom is another paid option for teams considering an immigration-focused software product.
• Litify is another paid legal software option.
• Quilia is another paid legal software option.

Verdict

Choose Assembly if your organization wants to build authenticated client apps and internal tools in a branded workspace, with the platform handling access controls. Its templates, integrations, and conversational build flow make that combination compelling, but low contact and user caps can force an upgrade, and the five-app ceiling persists on paid tiers through Advanced. Look elsewhere for public-facing products or if your workflows require more scale than those plans allow.