battles / Tax
Sibill vs Taxually
Sibill ($60/mo/mo, vibe code 3/10) vs Taxually ($150/mo/mo, vibe code 3/10). Sibill is the easier one to rebuild yourself — here is what you lose either way.
Tax
$60/mo/mo
- MVP
- 2 to 3 weeks
- Full replacement
- 6 to 9 months
easier to rebuild
get the build prompt →Tax
$150/mo/mo
- MVP
- 1 week
- Full replacement
- Not possible (requires tax authority accreditation, fiscal representation, and certified API access)
price gap / year
$1,080/mo
running both / year
$2,520/mo
our call
Start with Sibill — highest vibe code, weakest moat.
Sibill
You can easily build a visual cash flow forecasting engine that parses Italian electronic invoices with AI. However, maintaining licensed Open Banking connections and staying compliant with evolving Italian tax specs makes replacing Sibill long-term painful.
you can rebuild
- Visual cash flow timeline charts and balance projections.
- Fattura Elettronica XML parsing and extraction of payment due dates.
- Manual and rule-based transaction categorization.
- Basic invoice reconciliation with incoming bank transfers.
- Multi-account consolidated view dashboard.
what you lose
- Turnkey integration with Italian Open Banking aggregators via pre-certified AISP channels.
- Automated daily sync with Italian electronic invoice feeds (Agenzia delle Entrate / SDI connectors).
- Pre-configured machine learning models trained to categorize Italian merchant bank descriptions.
- Direct collaboration portal for external Italian accountants (Commercialisti).
- Zero-maintenance handling of PSD2 regulatory token refreshes.
real moats
- AISP regulation barriers and native integrations with Italian Open Banking aggregators.
- Pre-built classification models tuned on millions of messy Italian bank transaction descriptions.
- Workflow lock-in with Italian SMB accounting formats and accountant collaboration networks.
open source escape hatches
- Open Tax Solver / tax rules engines Mixed
- GOBL Apache-2.0
- Invopop Peppol / fatturapa MIT
Taxually
While aggregating sales data to compute VAT liability is easy to code, Taxually's true value is regulated tax filing and legal compliance with government tax authorities across Europe. AI cannot act as a certified tax agent, hold power of attorney, or legally submit tax returns directly to foreign government portals.
you can rebuild
- Aggregating transaction data across Shopify, Amazon, and WooCommerce for tax reporting
- Categorizing sales by destination country to track EU OSS (€10,000) threshold progress
- Applying historical EU and UK standard, reduced, and zero VAT rates to order line items
- Validating EU B2B customer VAT numbers against the VIES API web service
- Generating internal monthly CSV summaries of tax liabilities per country
what you lose
- Direct electronic filing to national tax authority portals (HMRC, ELSTER, DGFiP, etc.)
- Legal fiscal representation in EU countries where foreign merchants require local agents
- Guaranteed legal compliance and liability coverage for miscalculated returns
- Automatic maintenance of changing EU member state tax rates and reporting XML schemas
- Dedicated human tax professionals to respond to government audits and notices
real moats
- Official software accreditation and direct submission pipes with national tax offices
- Legal capacity to act as an accredited fiscal representative in international jurisdictions
- Direct API credentials and auth tokens issued by government finance ministries
open source escape hatches
- valvat MIT
- vatstack-js MIT
- vatrates MIT
Questions people ask
Which is easier to rebuild with AI, Sibill or Taxually?
Sibill. It scores 3/10 on vibe code with a moat of 5/10, so an AI-assisted MVP takes about 2 to 3 weeks and a full replacement about 6 to 9 months.
Which one costs less, Sibill or Taxually?
Sibill at $60/mo/mo for a typical mid-market store. The gap between the two is about $1,080/mo a year.
What do I lose if I replace Sibill?
Turnkey integration with Italian Open Banking aggregators via pre-certified AISP channels. Automated daily sync with Italian electronic invoice feeds (Agenzia delle Entrate / SDI connectors). Pre-configured machine learning models trained to categorize Italian merchant bank descriptions.
What do I lose if I replace Taxually?
Direct electronic filing to national tax authority portals (HMRC, ELSTER, DGFiP, etc.) Legal fiscal representation in EU countries where foreign merchants require local agents Guaranteed legal compliance and liability coverage for miscalculated returns
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