Checked 28 Oct 2026 · Sources · All comparisons
BuiltWith alternative
BuiltWith tracks over 128,000 technologies across hundreds of millions of domains, with contacts, spend estimates and CRM sync. Tellstack is a lookup API with the evidence for each finding, at 10,000 lookups for £49 a month.
Get a free keySide by side
| Feature | Tellstack | BuiltWith |
|---|---|---|
| Cheapest paid plan | £49 a month: 10,000 credits and 500 watches | Basic: $295 a month ($2,950 a year), 2 technologies and 2 keywords for reports |
| Other plans | £41 a month billed yearly; £39 a block from 5 blocks | Pro $495 a month; Team $995 a month |
| Price per lookup | 0.49p, or 0.39p from 5 blocks. A credit is one lookup or 10 list rows | API quotas for plans aren’t listed. Its API docs sell credit packs: 2,000 for $99, 10,000 for $259 |
| Free | 100 lookups a month, 10 watches, the top 25 rows of any list, the whole API; no card | Single-site lookups on its website “free to use … forever”; a free API for technology counts, 1 request a second |
| Lookup API | One domain, or bulk jobs of up to 10,000 in JSON or CSV | Domain API, up to 16 domains a call; bulk jobs of up to 5,000 |
| What a finding includes | Name, categories, version, confidence 0–100 and the evidence: the header, cookie, script, meta tag, DNS record or certificate | Name, categories, a confidence from 0 to 1, first and last detected, current and past |
| Sites using a technology | From our own index, most visited first, filtered by country domain and first-seen date. The index is young | Lists API, filtered by country, date, spend and more; needs a plan |
| Changes | Per-site history; watches on a domain or a technology, sent to signed webhooks | Change API (additions and removals); Live Feed of new detections, 2 technologies on Basic, 50 on Pro |
| Technologies | 7,647, from the open webappanalyzer fingerprints | 128,026, on its plans page |
| Index | Built from the Tranco top list and every lookup; rescanned monthly, watched sites weekly | “Data from 491.9 million domains”; pages “updated weekly” |
| History | From our first scan of a site, October 2026 at the earliest | “20+ years of adoption data”, in its words |
| Contacts and company data | None | Contact names, emails and titles, spend and revenue estimates, on every plan |
| CRM and tools | Webhooks and CSV only | Salesforce, HubSpot, Dynamics 365, Zoho, Pipedrive, Zapier, Slack and more |
| Browser extension | None | Chrome, Firefox and Edge |
| Terms | Cancel any month | Monthly plans have a one-month minimum, yearly a one-year minimum; cancel any time |
Where BuiltWith is stronger
- Scale: over 128,000 technologies and hundreds of millions of domains, against our 7,647 and a young index.
- Contacts, company details, spend and revenue estimates alongside each site.
- CRM integrations with bulk sync into Salesforce, HubSpot, Zoho and Dynamics.
- Long history and trend data, and a live feed of new detections.
- Free lookups on its website, and browser extensions.
- Our crawler doesn’t run JavaScript, so it misses some single-page app frameworks and script-only widgets, and sites that block bots only give us their DNS.
Where Tellstack fits
- A published price per lookup: 10,000 for £49 a month, with lists and bulk jobs on the same credits.
- The evidence behind every finding, so you can check it or filter on it.
- A free key with 100 lookups a month and the whole API, to try before you pay.
- DNS and certificate checks that still tell you something about sites that block crawlers.
Switching
Call GET /v1/lookup?domain= with a free key on twenty domains you already have BuiltWith data for, and compare. If what you rely on is lead lists for a niche technology, tell us which one: our index is young, and we crawl the corners people ask for first.
Sources
Read on 28 Oct 2026. BuiltWith prices are in US dollars, as its pages show them. They may have changed since.
- builtwith.com/plans: plans, terms, technologies, domains, free lookups
- api.builtwith.com and its llms.txt: Domain, Lists, Change and bulk APIs, credit prices
- api.builtwith.com/free-api
- api.builtwith.com/live-feed-api
- builtwith.com: trends history
- builtwith.com/crm-integrations
- builtwith.com/toolbar: browser extensions
BuiltWith is a trademark of its owner. Tellstack is made by Onibaku and isn’t affiliated with or endorsed by BuiltWith. Spot something out of date? Email admin@onibaku.co.uk and we’ll correct it.