Best Assembly Alternatives in 2026

Gusto

4.6

AI-powered payroll and HR platform with automatic tax calculations

Gusto runs payroll for businesses with 1 to roughly 100 employees, handling federal, state, and local tax calculations, direct deposits, W-2 and 1099...Read more →

• Automated federal, state, and local tax calculations and filings
• AI-powered payroll tax compliance across jurisdictions
• Integrated benefits administration with health insurance and 401(k)

OnPay

4.6

Simple payroll and HR platform for small businesses and their accountants.

OnPay runs payroll, files federal and state taxes, and administers benefits for small businesses under one login. Accountants get a separate...Read more →

• Automated payroll tax calculations and filings
• Workers' compensation insurance management
• Benefits administration with health insurance integration

Patriot Payroll

4.6

Affordable payroll software for small businesses.

Patriot Payroll handles payroll processing and tax filing for businesses with straightforward payroll needs. On the basic plan at $17/month plus $4...Read more →

• Full-service payroll processing with tax calculations
• Automated tax filing and compliance
• Direct deposit and employee self-service portal

Mango Practice Management

4.5

All-in-one practice management for accounting firms.

Mango Practice Management bundles time tracking, billing, project management, a client portal, and document storage into one platform aimed at solo...Read more →

• Integrated time tracking with billing automation
• Client portal for document sharing and communication
• Project management with task assignment and deadlines

Aero Workflow

4.4

Workflow management tool built specifically for accounting firms.

Aero Workflow runs the recurring task engine that replaces the spreadsheet most small accounting firms are still using to track 1040 deadlines,...Read more →

• Recurring task automation for compliance deadlines
• Team capacity planning and workload balancing
• Client workflow templates for standardized processes

TaxDome

4.6

All-in-one practice management for tax and accounting firms with built-in client portal

TaxDome replaces the five-to-six-tool stack most tax and accounting firms run — Canopy or Karbon for workflow, SmartVault or ShareFile for documents,...Read more →

• All-in-one client portal with document upload and e-signatures
• Automated organizer questionnaires for tax season
• Integrated workflow automation for tax and accounting processes

Toggl Track

4.6

Simple time tracking tool used by accounting firms and freelancers.

Toggl Track runs a one-click timer in the browser, desktop, or mobile app, tags the entry to a client and project, marks it billable or non-billable,...Read more →

• One-click time tracking with billable hour categorization
• Project-based time allocation for client work
• Automated timesheet generation for billing

Clio

4.6

Legal practice management with built-in accounting.

Clio runs the daily operations of a law firm: opening matters, tracking billable hours against those matters, generating legal invoices, and...Read more →

• Trust accounting (IOLTA) compliance management
• Legal-specific billing and invoicing workflows
• Time tracking with matter-based allocation

Justworks

4.6

PEO and payroll platform for small businesses.

Justworks is a Professional Employer Organization that co-employs your small business clients, handling payroll runs, federal and state tax filings,...Read more →

• Automated payroll processing with tax compliance
• Multi-state benefits administration
• Workers' compensation management

AbacusNext

4.6

Cloud solutions and practice management for legal and accounting professionals.

AbacusNext hosts your entire accounting or legal IT stack in their private cloud, then manages the infrastructure for you. In practice, that means...Read more →

• Cloud-hosted practice management for legal and accounting firms
• Automated compliance monitoring and reporting
• Secure document management with audit trails