Portalize vs Assembly
Assembly is a modular client-experience platform you run work inside. Portalize is a permission layer on Notion: clients see a scoped slice of databases you already maintain.
Assembly is a no-code client portal platform: branded logins, messaging, file sharing, intake forms, e-signatures, invoicing, tasks, a CRM, automations, and an app library you can embed (Airtable, Looker Studio, Calendly, and similar). The portal is the product. Your team and clients operate inside Assembly, with optional Zapier/Make/API extensions. Custom portal domains and full badge removal are paid packaging — complete white-label sits on a high-tier plan, not the entry tier.
Portalize does not try to be that OS. If projects, tasks, and deliverables already live in Notion, Portalize connects those databases and renders a branded, per-client portal with passwordless magic links and server-side row scoping. You keep working in Notion. Clients never get a Notion account. There is no second CRM, invoicing stack, or e-sign suite inside Portalize.
The choice is operating model, not a feature checklist. Pick Assembly when you want one branded system for communication, billing, and portal UX — and you are willing to run that work in Assembly. Pick Portalize when Notion is already the source of truth and the missing piece is private client access, not a new agency OS.
| Feature | Portalize | Assembly |
|---|---|---|
| Primary model | Notion-native portal layer | Modular client portal OS (apps + CRM) |
| Where work lives | Your existing Notion databases | Inside Assembly (plus embeds/integrations) |
| Keep working in Notion | Yes | No |
| Built-in messaging, invoicing, e-sign | No | Yes |
| Per-client data scoping | Server-side, by client identity | Per-client portal + app visibility rules |
| Client login | Passwordless magic link | Branded portal login (incl. passwordless options) |
| White-label badge removal | Professional plan | High-tier plan (not the entry tier) |
| Custom portal domain | Agency plan | Mid/high paid tiers |
| Free forever to start | 1 portal, up to 3 clients | No |
| Best for | Agencies already running delivery in Notion | Teams replacing email + billing + portal with one OS |
Choose Portalize when
- Notion is already where delivery lives and you refuse to re-enter it into a portal OS.
- You need private, scoped client views more than in-portal chat, invoices, or contracts.
- You want a free forever plan to prove the portal with real clients before you pay.
Assembly may fit better when
- You want messaging, billing, e-sign, CRM, and the portal in one branded product.
- You do not use Notion as the system of record (or you are ready to leave it).
- HIPAA/SOC packaging, a deep app library, or custom apps inside the portal are the buying criteria.
Frequently asked questions
Is Portalize an Assembly alternative?
Only for the private client-access job. Assembly is a full client-experience OS. Portalize is a scoped portal layer on Notion. If you need invoices and e-sign in the same login, Assembly is the broader product.
Can Assembly show my Notion databases to clients?
Not as a native Notion portal. Assembly can embed other tools and connect via Zapier/Make/API. Portalize reads Notion databases directly and scopes rows by client identity.
Which is more white-label?
Both support branding and custom domains on paid plans. Assembly’s complete badge removal is a high-tier feature. Portalize removes “Powered by Portalize” on Professional and adds a custom domain on Agency — stated on /white-label-client-portal and /pricing.
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