Assembly
7.7#4 in legal client portal softwareFrom $29 a monthFree planWebAPImacOSWindows
VisitAssembly vs B12
What both publish
| Fact | Assembly | B12 |
|---|---|---|
| Documentation | The documentation includes getting-started guides, built-in app references, custom-app building, API reference, MCP and support sections. | The Help Center is organized into getting started, AI Agent, built-in features, integrations, publishing/domains, troubleshooting, billing and support sections. |
| Integrations | Assembly supports embedded third-party tools and connects to more than 1,000 apps through Zapier, Make and similar no-code services. | Listed integrations include Calendly, Shopify, Ecwid, PayPal, Google tools, Eventbrite, WhatsApp, WordPress, YouTube and custom HTML or scripts. |
| Praise: support | Software Advice reviewers describe customer support as responsive and say the product is regularly improved. | GetApp reviewers repeatedly describe B12 support as friendly, knowledgeable, personal and quick to resolve issues. |
| Product | Assembly combines an AI app builder with a CRM and branded client experience for building client-facing apps and internal tools. | B12 builds websites, online stores, portfolios, blogs, web apps, and internal business tools from a prompt. |
| Rating on Capterra | 4.8 out of 5 from 35 reviews for the client-portal listing. | 4.1 out of 5 from 113 reviews. |
| Rating on G2 | 4.7 out of 5 from 344 reviews. | 4.2 out of 5 from 30 reviews. |
| Rating on Software Advice | 4.8 out of 5 from 35 reviews. | 4.1 out of 5 from 113 reviews. |
Assembly plans
- FreeFree
- Starter$29 a month
- Professional$99 a month
- Advanced$499 a month
- EnterprisePriced on request
B12 plans
- FreeFree
- Website$24 a month
- Website + Client Engagement$78 a month
Pick Assembly if…
Assembly suits teams building authenticated client-facing apps or internal tools, particularly those that want templates, connected services, and an integrated client experience. It is not suited to teams building public websites, public directories, or consumer apps.
Pick B12 if…
B12 may suit businesses, creators, agencies, nonprofits, and individuals building a site or business tool from a prompt. It is also relevant to users seeking built-in lead management, email campaigns, or payment and invoice features.