#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 PickAI-enhanced
Thomson Reuters ONESOURCE
4.6Custom Pricing
- Corporate income tax compliance and reporting
- Tax provision calculation and automation
Best for: Enterprise (50+)
#3 PickAI-enhanced
TaxJar
4.5Freemium
- Automated sales tax calculation across 14,000+ US jurisdictions
- AI-powered product taxability determination
Best for: Any size
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)
Enterprise tax technology platform for corporate tax departments.
AI-enhancedEnterprise (50+)Enterprise deployment50+ integrations
ONESOURCE is Thomson Reuters' enterprise tax platform covering corporate income tax compliance, tax provision, indirect tax, transfer pricing...Read more →
- Corporate income tax compliance and reporting
- Tax provision calculation and automation
- Indirect tax management across jurisdictions
Custom Pricing
vs FIZ: Strong integration ecosystem with SAP, Oracle ERP
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
TaxGPT
4.4AI-powered tax research and advisory assistant for CPAs
AI-nativeSmall firm (2-10)Instant signup
TaxGPT is a tax research tool that lets CPAs type a question in plain English and get back cited answers referencing the IRC, Treasury Regulations,...Read more →
- AI-powered tax research with natural language queries
- Automated citations to IRC, Treasury Regulations, and case law
- Document upload for context-specific tax analysis
From $49/mo
vs FIZ: More advanced AI capabilities (AI-native vs AI-enhanced)
Avalara
4.6Cloud-based tax compliance automation for businesses of all sizes
TraditionalEnterprise (50+)Implementation required300+ integrations
Avalara calculates the correct sales tax at the point of sale across 12,000+ tax authorities in the US and internationally. When a transaction...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
Track1099
4.6Cloud-based 1099 filing platform with e-delivery.
TraditionalAny sizeLight setup10+ integrations
Track1099 files 1099s electronically with the IRS and delivers recipient copies by email or postal mail from a single dashboard. TIN matching runs...Read more →
- Electronic 1099 filing with IRS
- Automated e-delivery to recipients via email/mail
- W-9 solicitation and collection
From $3/mo
vs FIZ: Strong integration ecosystem with QuickBooks, Excel
Taxfiler
4.6UK-focused cloud tax preparation and accounts production software.
TraditionalSmall firm (2-10)Light setup15+ integrations
Taxfiler handles the core UK compliance stack: self-assessment returns, CT600 corporation tax filings, statutory accounts production, and...Read more →
- Making Tax Digital (MTD) compliance automation
- Corporation tax return preparation
- Statutory accounts production
From $15/mo
vs FIZ: Strong integration ecosystem with HMRC Gateway, Companies House
Tax and accounting intelligence platform.
AI add-onMid-size firm (11-50)Light setup15+ integrations
Bloomberg Tax pulls primary source material — IRC code sections, Treasury regulations, IRS guidance, court opinions, and tax treaties — into a single...Read more →
- Real-time tax news and regulatory updates
- Comprehensive tax research database with primary sources
- Tax compliance workflow management
Paid
vs FIZ: Strong integration ecosystem with Excel, Outlook
Drake Tax
4.6Professional tax preparation software with AI-assisted workflows
AI add-onSmall firm (2-10)Light setup15+ integrations
Drake Tax handles individual (1040), partnership (1065), corporation (1120/1120-S), fiduciary (1041), and non-profit (990) returns from a single...Read more →
- Comprehensive multi-entity tax return preparation
- Keyboard-driven workflow for high-volume processing
- AI-powered error detection and data validation
Paid
vs FIZ: Strong integration ecosystem with QuickBooks, Excel
Gumroad
4.6Platform for selling digital products, memberships, and courses.
TraditionalSolo practitionerInstant signup15+ integrations
Gumroad is an e-commerce platform built for independent creators selling ebooks, courses, templates, software, and memberships. It handles checkout...Read more →
- Automated tax calculation and compliance
- Digital invoice delivery and payment processing
- Revenue analytics and sales reporting
PaidFree plan
vs FIZ: Strong integration ecosystem with Stripe, PayPal
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.