How TLDMath works
Domain registrars compete on the first-year price and make it up on renewals. TLDMath exists to show the whole bill before you buy.
Live, per-domain prices
When you search a name, we query each registrar’s API for that exact domain: availability, premium status, registration, renewal and transfer price. Results are cached for ten minutes. If any registrar says a name is taken, we treat it as taken.
Ranking by two-year cost
We rank registrars by what it costs to hold the domain for two years: the first year plus one renewal, or the full minimum term for extensions like .ai. The cheapest first-year offer is shown separately, so promos are visible without winning by default.
Naming help
“Describe my project” asks Claude to rank the TLDs that fit your project and brainstorm ten names, then checks which of those are actually free. It also checks whether each name is taken on GitHub, npm, PyPI, crates.io and YouTube, and links to the official trademark databases. Ideas are a starting point, not legal clearance.
Setting a domain up
The launch kit lists the DNS records your website host or AI app builder, your inbox and your app’s email service need, and checks each one against public DNS. It merges SPF records into one, flags old records to remove, and can lay the changes out as steps with commands for your own terminal or AI tool. Moving an app off Lovable, Bolt, Replit or Base44 gets the same treatment, in an order that keeps the live site up, with each builder’s export steps taken from its own docs. The ownership card shows who runs a domain today, from public records.
What we don’t do
- We don’t sell domains or take payment. You buy at the registrar.
- We don’t invent prices. If a registrar’s API doesn’t return a price, the cell is blank.
- Affiliate links, where they exist, never change the order.
- We don’t change your DNS, hosting or accounts, and we never ask for your keys. We plan and check; you or your AI tool make the changes.
Registrars
Porkbun, Namecheap, Dynadot, Cloudflare Registrar, Vercel, NameSilo, Name.com and Hostinger today, with more coming. TLD tables refresh daily.
Who makes TLDMath
TLDMath is built and run by Riverbend Crossroads Digital LLC, an independent software studio in Indiana, USA. It’s free to use. We earn a commission from some registrar and email-provider links; they never change the ranking. Questions or corrections: support@tldmath.com. More of our tools are at riverbendcrossroadsdigital.com.