#1 PickAI-native
Keeper Tax
4.6Paid
- AI-powered automatic expense detection from bank transactions
- 1099 contractor and Schedule C tax filing
Best for: Solo practitioner
Best FIZ Alternatives in 2026
Compare 10 alternatives to FIZ for tax preparation & compliance
Last updated April 2026
Why look for FIZ alternatives?
- Portugal-only with no crossover utility — any practitioner or client outside the Portuguese tax regime gets nothing from this tool.
- Sole traders and independent professionals only — no firm-level features, no client workspaces, no team seats for accountants managing multiple filers.
Top Picks
#2 PickTraditional
TaxScouts
4.6From $119/mo
- Self-assessment tax return filing
- Certified accountant review and submission
Best for: Solo practitioner
#3 PickTraditional
TaxAct Professional
4.6From $200/mo
- Unlimited individual tax return filing
- Pay-per-return business tax preparation
Best for: Solo practitioner
Quick Comparison
All FIZ Alternatives
Keeper Tax
4.6AI tax filing and bookkeeping for freelancers and self-employed professionals
AI-nativeSolo practitionerInstant signup15+ integrations
Keeper connects to your bank accounts, credit cards, PayPal, Stripe, and Venmo, then scans every transaction throughout the year looking for Schedule...Read more →
- AI-powered automatic expense detection from bank transactions
- 1099 contractor and Schedule C tax filing
- Quarterly estimated tax calculations with reminders
PaidFree plan
vs FIZ: More advanced AI capabilities (AI-native vs AI-enhanced)
TaxScouts
4.6UK online tax return service using certified accountants.
TraditionalSolo practitionerInstant signup
TaxScouts handles UK self-assessment filing through a handoff model: the taxpayer completes an online questionnaire covering income sources,...Read more →
- Self-assessment tax return filing
- Certified accountant review and submission
- HMRC-compliant tax return processing
From $119/mo
vs FIZ: Higher rated at 4.6/5 vs 4.1/5
Affordable professional tax preparation software with unlimited individual return filing.
TraditionalSolo practitionerLight setup15+ integrations
TaxAct Professional prepares and e-files individual and business tax returns for solo practitioners and small firms. The unlimited individual return...Read more →
- Unlimited individual tax return filing
- Pay-per-return business tax preparation
- Electronic filing with IRS and state agencies
From $200/mo
vs FIZ: Strong integration ecosystem with QuickBooks, Excel
Consumer and professional tax preparation software from Intuit.
AI-enhancedSmall firm (2-10)Light setup50+ integrations
TurboTax Business handles federal and state returns for sole proprietors, S-corps, C-corps, partnerships, and LLCs from a single purchase....Read more →
- AI-powered tax guidance and optimization
- Maximum refund guarantee
- Expert CPA review option
From $130/mo
vs FIZ: Strong integration ecosystem with QuickBooks, Excel
AI-enhanced professional tax software with smart navigation and diagnostics
AI-enhancedSmall firm (2-10)Light setup15+ integrations
ProConnect is Intuit's cloud-based professional tax platform handling individual, partnership, S-corp, C-corp, and fiduciary returns. Day-to-day, it...Read more →
- AI-powered error detection and diagnostic review
- Comprehensive tax form coverage for all entity types
- Direct QuickBooks data import and integration
Paid
vs FIZ: Strong integration ecosystem with QuickBooks Online, QuickBooks Desktop
TaxJar
4.5AI-powered sales tax automation for e-commerce businesses
AI-enhancedAny sizeLight setup50+ integrations
TaxJar calculates US sales tax at checkout, files returns in every state where you have nexus, and alerts you when you cross economic nexus...Read more →
- Automated sales tax calculation across 14,000+ US jurisdictions
- AI-powered product taxability determination
- Auto-filing tax returns in all required states
FreemiumFree plan
vs FIZ: Strong integration ecosystem with Stripe, Shopify
Avalara
4.6Cloud-based tax compliance automation for businesses of all sizes
TraditionalEnterprise (50+)Implementation required300+ integrations
Avalara connects to your e-commerce platform, ERP, or accounting software via API and calculates the correct sales tax at the point of sale across...Read more →
- Real-time tax rate calculation across thousands of jurisdictions
- Automated sales tax filing and remittance
- Multi-state and international VAT compliance
Custom Pricing
vs FIZ: Strong integration ecosystem with QuickBooks, Xero
Sovos
4.6Global tax compliance and reporting platform.
TraditionalEnterprise (50+)Enterprise deployment50+ integrations
Sovos handles VAT determination, e-invoicing submission, and tax reporting filings across 70+ countries from a single platform. Day-to-day, it...Read more →
- Global VAT compliance automation across 70+ countries
- Real-time e-invoicing with regulatory compliance
- Automated tax determination and calculation
Custom Pricing
vs FIZ: Strong integration ecosystem with SAP, Oracle ERP
UltraTax CS
4.6Enterprise tax preparation software from Thomson Reuters.
TraditionalEnterprise (50+)Enterprise deployment15+ integrations
UltraTax CS handles the full federal and state return library — 1040s, 1120s, 1065s, 1041s, 990s, exotic forms that competitors skip — making it the...Read more →
- Comprehensive tax form library covering federal and state returns
- Multistate tax filing and allocation capabilities
- Complex business and partnership return preparation
Custom Pricing
vs FIZ: Strong integration ecosystem with CS Professional Suite, QuickBooks
Tax and accounting research platform.
TraditionalMid-size firm (11-50)Light setup15+ integrations
Checkpoint is Thomson Reuters' tax and accounting research platform used daily by tax attorneys, CPAs, and Big 4 researchers to find primary sources,...Read more →
- Primary tax source research and case law analysis
- Tax code citations and annotations
- Practice-ready tax forms and workflow tools
Paid
vs FIZ: Strong integration ecosystem with Excel, Outlook
How We Chose These Alternatives
We evaluate AI accounting tools across multiple dimensions: feature depth, pricing transparency, integration ecosystem, user ratings, and vendor stability. The alternatives listed here share the same primary category as FIZ and are actively maintained. Tools are ranked by user ratings and review volume. We update this page as new tools enter the market and existing ones evolve.