What people want to replace
Estibot does more than appraise. Its paid plans add bulk appraisals, keyword search and advertising data, and end-user finder tools for identifying companies that might buy a name. Most people searching for an alternative want one of three things: a free appraisal, cheaper bulk appraisals, or keyword data for names. No single tool replaces all of it.
The alternatives at a glance
| Tool | Replaces | Built on | Cost |
|---|---|---|---|
| HumbleWorth | Appraisals, including bulk | Reported sales data, with auction, marketplace and brokerage estimates | Free, no account; bulk up to 2,000 names |
| GoDaddy (GoValue) | Single appraisals | GoDaddy aftermarket sales and machine learning | Free |
| Atom | Appraisals with market insight | AI over hundreds of data points, including sell-through rates and comparable sales | Free |
| Dynadot | Single appraisals | Length, keyword demand, extension and aftermarket sales | Free |
| NameWorth | Appraisals with investor stats | Market data aimed at domain investors | Free and paid |
| pc.domains | Single appraisals | Machine learning on 2.6M+ recorded sales | Free tier, paid plans |
| NameBio | Comparable-sales research | $3B+ of recorded domain sales | Free search, paid features |
| SiteAppraiser | Quick single appraisals | Name structure, extension, length and niche demand, with every factor shown | Free, no signup |
Features and pricing as published by each provider in October 2026. Check before relying on a specific plan.
Closest free replacement: HumbleWorth
For appraisals alone, HumbleWorth is the nearest free substitute for Estibot's paid tier. It returns three estimates per name rather than one, takes a portfolio of up to 2,000 names at once, and needs no account. Bishopi's comparison also notes it offers API access.
For comparable sales: NameBio
Estibot's figure is a model. NameBio is the record of what names actually sold for, and it is what experienced investors check before setting a price. Use it alongside whichever appraisal tool you choose rather than instead of one.
For keyword data
Estibot's search-volume and cost-per-click figures are harder to replace for free. General keyword tools from Google Ads, Ahrefs or Semrush give you the same underlying data for the words in a name, though without Estibot's domain-specific packaging.
Do any of them agree?
Often not, and that is useful. Each tool is trained on different data and weights the factors differently. Run a name through three and read the spread: a tight cluster means the name has real comparables, a tenfold spread means it does not. Our <a href="https://siteappraiser.com/blog/how-accurate-are-domain-appraisal-tools/">comparison of free appraisal tools</a> covers how each one works.
- Estibot combines appraisals, keyword data and buyer-finding tools; no single alternative replaces all three.
- HumbleWorth is the closest free replacement for appraisals, including bulk.
- NameBio is for comparable sales, which every estimate should be checked against.
- Use several tools and read the spread, not the average.
Value the name itself — separate from any site on it, no email required. The method and the reported sales behind the estimate are published alongside it.
Appraise a domain