SimpleTaxCalculator vs Surfer
Neck and neck on boosts. Profiles, pricing and deals below.
SimpleTaxCalculator
Free US Tax Tools 2026
community boosts
⚡ 0
pricing
Freemium
what it is
Free US tax calculators for sales tax, property tax, inheritance tax, gas tax, and self-employment tax. State-specific rates updated for 2026. No signup required.
Surfer
Content optimization scored against the live SERP
community boosts
⚡ 0
pricing
Paid
what it is
Surfer analyzes what already ranks and turns it into a live content score as you write - terms, structure, length. It made on-page optimization measurable. Popular with content teams scaling SEO articles.