Best Assembly Alternatives in 2026

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

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

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)

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

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

Practice Ignition

4.6

Client engagement platform that automates proposals, payments, and workflows for professional services firms.

Practice Ignition covers the stretch between winning a client and getting paid by them. You build a proposal from an engagement letter template, send...Read more →

• Automated proposal generation with e-signatures
• Recurring payment processing and invoicing
• Workflow automation triggers to connected tools

Harvest

4.6

Time tracking and invoicing tool for service businesses.

Harvest is a time tracking tool with invoicing built on top of it. Each day, team members log hours against specific projects and clients; at billing...Read more →

• Billable hours tracking with project allocation
• Automated invoice generation from tracked time
• Project profitability analysis and reporting

Ignition

4.6

Client engagement and commerce platform for accounting firms.

Ignition replaces the manual back-and-forth of client onboarding by handling proposals, engagement letters, billing authorization, and payment...Read more →

• Automated proposal generation and delivery
• Digital engagement letter workflows
• Integrated billing and payment collection