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Head-to-head · Customer Portal Software

Assembly vs FuseBase

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score Assembly #1 in Customer Portal Software 9.4/10 Free plan Free plan✓ 5 of 5 features Visit Assembly
FuseBase #6 in Customer Portal Software 8.8/10 Free plan · 14-day trial Free planFree trial✓ 4 of 5 features Visit FuseBase

Assembly leads on 0 checks, FuseBase on 1, and 6 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAssembly · 9.4/10
  • Free planboth
  • Free trialonly FuseBase
  • Most featuresAssembly · 5 of 5

Assembly scores higher on our rubric for customer portal software: 9.4 against 8.8 out of 10; our editors rank them #1 and #6.

FuseBase leads on client user limit: 100 users versus 50 users.

Assembly is the better fit for teams wanting a full portal with a free plan. FuseBase is the better fit for teams needing deep portal customization.

  • Assembly fits best

    Teams wanting a full portal with a free plan

  • FuseBase fits best

    Teams needing deep portal customization

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Assembly 9.4/10 Visit ↗ FuseBase 8.8/10 Visit ↗
At a glance
Editor score 9.4 8.8
Ranking #1 in Customer Portal Software #6 in Customer Portal Software
Best for Teams wanting a full portal with a free plan Teams needing deep portal customization
Pricing model Free plan + paid Free plan + paid
Starting price $29/mo —
Free plan ✓ ✓
Free trial — 14 days
Deployment Cloud, Desktop Cloud, Mobile, Browser extension
Platforms Web, Windows, macOS Web, iOS, Android, Chrome extension
Support Email, Community, Docs Email, Docs
Compliance SOC 2, GDPR, HIPAA, 2FA GDPR, SOC 2, HIPAA
Integrations 1,000+ integrations 9 integrations
Built for Solo, Small business, Mid-market Solo, Small business, Mid-market, Enterprise
Features Assembly 5/5 · FuseBase 4/5
Request intake ✓ ✓
Work tracking ✓ ✓
File sharing ✓ ✓
Custom domain ✓ ✓
Single sign-on ✓ (best) Not checked yet
Specs
Client user limit 50 users 100 users (best)
Our review
Pros
  • Branded portals cover onboarding, forms, files, messaging, and contracts
  • Billing, payments, subscriptions, and eSignatures extend beyond basic portals
  • Free plan plus Zapier, Make, API, and MCP connections support flexible adoption
  • Custom HTML, CSS, and JavaScript page building
  • Branded portals with forms, tasks, files, and e-signatures
  • Integrations with Slack, Teams, Google Drive, Stripe, and more
Cons
  • Free plan is limited to 5 active contacts and 1 internal user
  • Starter has 1 internal user despite expanding to 50 active contacts
  • Broad functionality may exceed the needs of teams wanting only file sharing
  • Advanced portal and client limits depend on the arrangement
  • Unlimited access is available through custom pricing
  • The feature range may exceed the needs of simple portal projects
Our verdict

Assembly is a client portal and customer-experience platform for professional service firms. It brings branded and white-labeled client workspaces together with onboarding checklists, intake forms, file sharing, messaging, tasks,…

Read the review →

FuseBase is a client collaboration platform for agencies, consultants, professional-services businesses, and other client-facing teams. It combines branded client portals with internal and external workspaces for sharing files, tasks,…

Read the review →
  1. AssemblyCustomer Portal Software 9.4Free plan
  2. FuseBaseCustomer Portal Software 8.8Free plan · 14-day trial

Strengths and trade-offs

  • Assembly — where it wins

    • Branded portals cover onboarding, forms, files, messaging, and contracts
    • Billing, payments, subscriptions, and eSignatures extend beyond basic portals
    • Free plan plus Zapier, Make, API, and MCP connections support flexible adoption

    Where it doesn't

    • Free plan is limited to 5 active contacts and 1 internal user
    • Starter has 1 internal user despite expanding to 50 active contacts
    • Broad functionality may exceed the needs of teams wanting only file sharing

  • FuseBase — where it wins

    • Custom HTML, CSS, and JavaScript page building
    • Branded portals with forms, tasks, files, and e-signatures
    • Integrations with Slack, Teams, Google Drive, Stripe, and more

    Where it doesn't

    • Advanced portal and client limits depend on the arrangement
    • Unlimited access is available through custom pricing
    • The feature range may exceed the needs of simple portal projects
  • Assembly9.4/10 · Free plan

    A broad client portal with onboarding, billing, files, workflows, and a free plan.

    Visit AssemblyFull verdict →
  • FuseBase8.8/10 · Free plan · 14-day trial

    A flexible client portal platform for teams that need branded, customized workspaces.

    Visit FuseBaseFull verdict →

More comparisons

All customer portal software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update