battles / Tax
EAS Project vs Sovos
EAS Project ($99/mo/mo, vibe code 3/10) vs Sovos ($1,500/mo/mo, vibe code 3/10). EAS Project is the easier one to rebuild yourself — here is what you lose either way.
Tax
$99/mo/mo
- MVP
- 1 week
- Full replacement
- Never (Not Feasible)
easier to rebuild
get the build prompt →Tax
$1,500/mo/mo
- MVP
- 1 week
- Full replacement
- Indefinite — rate maintenance, legal liability, and government filing integrations cannot be replicated with custom code.
price gap / year
$16,812/mo
running both / year
$19,188/mo
our call
Start with EAS Project — highest vibe code, weakest moat.
EAS Project
Coding a math formula that adds 21% VAT to a cart takes 10 minutes. However, EAS acts as a registered EU fiscal intermediary, filing legal monthly returns and assuming liability across 27 EU member states. AI cannot write code that replaces legal standing with tax authorities.
you can rebuild
- Destination-based EU VAT calculation engine at checkout
- VIES database API lookup for B2B VAT number validation
- Automated HS code matching rule builder based on SKU attributes
- Commercial invoice data formatting for logistics carriers
- Basic order export reporting grouped by EU country
what you lose
- Official EU IOSS fiscal representation and legal registration
- Automated tax filing and remittance to EU member state tax offices
- Customs clearance guarantees and liability protection for incorrect duty collection
- Real-time maintenance of national VAT rate changes and reduced-rate exemptions across 27 countries
- Direct carrier integration for automated digital customs declarations (CN22/CN23)
real moats
- EU Fiscal Representative legal status required for non-EU sellers
- Direct operational interface with EU member state tax authority filing systems
- Legal risk absorption and tax audit indemnity
open source escape hatches
- valvat MIT
- commerce_vat GPL-2.0
- vat-calculator MIT
Sovos
Sovos is not software you buy for its UI; you pay for tax liability offloading, maintained rate tables, and automated regulatory filings across tens of thousands of global tax authorities. While writing code to multiply subtotal by a tax rate is trivial, maintaining real-time tax law compliance across changing municipal boundaries is impossible for a single engineering team. Custom implementations leave your business exposed to severe tax audit penalties and personal liability.
you can rebuild
- Basic percentage-based sales tax calculation API
- Exemption certificate file storage dashboard
- Simple order tax breakdown reporting for admin UI
- Static ZIP code to tax rate lookup table
- CSV transaction exporter for manual CPA review
what you lose
- Real-time updated rate tables across 10,000+ US jurisdictions and global VAT/GST rules
- Direct automated tax return generation and remittance filing to state and federal agencies
- Government-mandated Continuous Transaction Controls (CTC) and e-invoicing framework compliance
- Address geocoding down to latitude/longitude for composite tax district boundaries
- Audit liability protection and direct enterprise compliance guarantees
real moats
- Regulatory compliance integrations with tax authorities worldwide
- Proprietary geospatial tax boundary maps updated dynamically as laws change
- Financial liability coverage and legal indemnification for calculation errors
open source escape hatches
- Valvat MIT
- Shopware Tax System MIT
- Sylius Taxator MIT
Questions people ask
Which is easier to rebuild with AI, EAS Project or Sovos?
EAS Project. It scores 3/10 on vibe code with a moat of 6/10, so an AI-assisted MVP takes about 1 week and a full replacement about Never (Not Feasible).
Which one costs less, EAS Project or Sovos?
EAS Project at $99/mo/mo for a typical mid-market store. The gap between the two is about $16,812/mo a year.
What do I lose if I replace EAS Project?
Official EU IOSS fiscal representation and legal registration Automated tax filing and remittance to EU member state tax offices Customs clearance guarantees and liability protection for incorrect duty collection
What do I lose if I replace Sovos?
Real-time updated rate tables across 10,000+ US jurisdictions and global VAT/GST rules Direct automated tax return generation and remittance filing to state and federal agencies Government-mandated Continuous Transaction Controls (CTC) and e-invoicing framework compliance
More battles
One e-commerce SaaS teardown every week.
Honest verdicts, build prompts and overlooked vertical SaaS opportunities. No tracking pixels, no drip sequence, unsubscribe in one click.
free forever · no third-party tracking · the prompts stay public