HomeFeaturesPricingApp DemoAboutContact Sign InGet Started
🎉 Early Bird launch promo · Get 30% off year 1 on annual plans with code EARLYBIRD30 · ends 31 Dec 2026
PRICING

Plans that scale
with your projects

Start free. Upgrade when you're ready. Cancel anytime — no hidden fees, no commitments. All plans include real-time calculation, EN/TH/ZH/HI interface, and global payment support.

Free
Students & explorers
$0
forever
  • 1 active project
  • Up to 3 floors / 5 rooms
  • Real-time BTU/OTTV slider
  • Multilingual UI (EN/TH/ZH/HI)
  • No PDF export
  • No save/load
  • No baseline comparison
Start Free
Starter
Solo architects · Student Pro
$19$16 ฿690฿575/mo
billed monthly$192/yr · save 16% billed monthly฿6,900/yr · save 17%
  • Up to 5 floors / 20 rooms
  • Save / Load 10 projects
  • Watermarked PDF export
  • Baseline comparison
  • Carbon impact report
  • Email support
  • No custom branding
Start 14-day Trial
⭐ Most Popular
Pro
Working professionals
$49$42 ฿1,790฿1,492/mo
billed monthly$499/yr · save 15% billed monthly฿17,900/yr · save 17%
  • Unlimited floors / rooms / projects
  • Custom-logo PDF export
  • Layered R-Value Calculator
  • Break-even & ROI analysis
  • Multi-direction façade optimizer
  • Priority support 24h
  • API access (read-only)
Start 14-day Trial
Studio
Architecture / Engineering firms
$199$169 ฿7,190฿5,992/mo
5 seats · billed monthly$1,990/yr · 5 seats 5 seats · billed monthly฿71,900/yr · 5 seats
  • Everything in Pro
  • 5 user seats (+$35/seat)
  • Team project sharing
  • Firm-branded PDF reports
  • Material catalog (B2B)
  • Slack/Teams onboarding
  • Quarterly review session
Book a Demo

Enterprise / White-label / API

For developers, governments, certification bodies, and large firms. Custom climate database, SSO/SAML, dedicated success manager, 99.9% SLA.

Contact Sales Starting at $5,000/year฿180,000/year
Compare Plans

Every feature, every plan

FeatureFreeStarterProStudioEnterprise
Projects110 savedUnlimitedUnlimitedUnlimited
Floors / Rooms3 / 55 / 20UnlimitedUnlimitedUnlimited
Real-time BTU/OTTV Slider✓✓✓✓✓
Save / Load—✓✓✓✓
PDF Export—WatermarkedCustom LogoFirm BrandWhite-label
Baseline vs. Optimized—✓✓✓✓
Layered R-Value Calculator——✓✓✓
Break-even / ROI Panel——✓✓✓
Multi-direction Optimizer——✓✓✓
Carbon Impact Report—✓✓✓✓
Team Seats1115 (+$35)Custom
API Access——Read-onlyRead/WriteFull + SSO
Material Catalog (B2B)———✓✓
Custom Climate DB————✓
SupportCommunityEmail 48hPriority 24hSlack/TeamsDedicated
SLA———99.5%99.9%
Pricing FAQ

Common questions, straight answers

Can I switch plans anytime?
Yes. Upgrade and the new features unlock immediately, prorated. Downgrade and the change applies at your next billing cycle.
What happens after the 14-day trial?
Nothing automatic. We email you 3 days before trial ends. If you don't add a payment method, you'll be moved to the Free tier — no charges, no surprises.
Do you offer educational discounts?
Yes. Verified university students and faculty get our Educational Lifetime Free plan with full Pro features. Email hello@zerooptimize.com with your .edu/.ac.th email.
Do you offer refunds?
Yes. 14-day money-back guarantee on first-time monthly subscriptions, and 30-day for annual plans. See full refund policy.
Can I pay annually for a discount?
Yes — annual billing saves you 15% vs. monthly. Toggle the switch at the top of the page to see annual prices.
What currencies do you support?
All payments are processed by Xendit, Southeast Asia's leading payment gateway (PCI-DSS Level 1 · ISO 27001). Live exchange rate displays your local currency at checkout — direct billing in THB, IDR, PHP, MYR, VND, SGD, USD, EUR, GBP, INR, and JPY.