Checked 28 Oct 2026 · Sources
Tellstack compared
Five ways to find out what a website is built with, next to Tellstack. Every figure is from each company’s own pricing and docs pages, in its own currency, before tax.
Get a free keyAt a glance
| Tool | Cheapest paid plan | Per lookup | Free | API | Lead lists | Worth knowing |
|---|---|---|---|---|---|---|
| Tellstack | £49 a month for 10,000 credits | 0.49p; 0.39p from 5 blocks | 100 lookups a month | Every plan, free included | Yes, from a young index | Evidence on every finding; no extension, contacts or CRM; doesn’t run JavaScript |
| BuiltWith | $295 a month (Basic) | Plan quotas not listed; API credit packs from 2,000 for $99 | Single-site lookups on its website | Domain, Lists and Change APIs | Yes, needs a plan | 128,000+ technologies; contacts, spend data, CRM sync |
| Wappalyzer | $10 a month (Plus, no API) | $0.05 on Plus; $0.0225 an API credit on Business | 50 lookups a month | From Business, $450 a month | From Pro, $250 a month | Extension with 2.5M+ users; contacts and CRM |
| WhatRuns | No paid plans shown | Free | The extension | None found | No | Browser extension, one site at a time |
| SimilarTech | Not public: talk to Similarweb sales | Not public | Technology Checker | Business and Enterprise plans, or standalone | Contact lists by technology | Part of Similarweb; daily technologies dataset |
| StackShare | No pricing page | Not a lookup tool | Public browsing | No domain lookup API | No | Self-reported stacks from a developer community |
One page each
How to read this
A Tellstack credit is one lookup or ten list rows. Wappalyzer counts about one credit a website, BuiltWith and Similarweb price credits per endpoint, and we haven’t converted dollars to pounds.
Tellstack is the newest and smallest here. Where a rival is stronger, its page says so.
Sources
The pricing pages behind the table, read on 28 Oct 2026. Each comparison page lists the rest.
BuiltWith, Wappalyzer, WhatRuns, SimilarTech, Similarweb and StackShare are trademarks of their owners. Tellstack is made by Onibaku and isn’t affiliated with or endorsed by any of them. Spot something out of date? Email admin@onibaku.co.uk and we’ll correct it.