1lookup

Data and validation APIs

From $2.00

per 1,000 tech stack lookups; $4.95 on Starter

Website technology data

No public price; sold by quote

similartech.com

No printed price vs half a cent a site

SimilarTech prints no price on its site, and 1Lookup reads what a website runs on for $0.005 a site that answers, by API or a CSV upload.

Looking for a SimilarTech alternative? This page sets SimilarTech pricing beside 1Lookup, with every SimilarTech figure taken from its own published pages, checked October 2026.

Start the 7-day free trial See per-lookup pricing

7-day free trial on every plan
No contract and no minimum volume

1
Credit per site that answers
about $0.005 on Starter
6,000+
Technologies recognised
open fingerprints, kept current
0
Credits when a site blocks the check
or does not exist
11
Groups in every answer
CMS to security

At a glance

Here is where 1Lookup wins against SimilarTech, and where SimilarTech still wins.

Both tell you what a website is built with. SimilarTech breaks a company's website technologies down by category, compares competitors' stacks side by side, searches for companies by technology and builds contact lists from technology signals, each behind a sign-up, with no price printed. 1Lookup is one live call with a printed price: the site's CMS, shop platform, analytics, marketing tools, hosting and frameworks with versions, detected from its headers, HTML and DNS, plus the email provider from MX.

1lookupWhere 1Lookup wins

A price printed before you sign up: about $0.005 a site that answers on Starter, and nothing for a blocked or missing site
An API and a CSV upload from the first plan, with flat fields for a CRM and a structured list for code
Read live when you ask, with versions where the site shows them
The email provider from MX kept apart from the services DNS verification records name

What it costs

From $2.00

per 1,000 tech stack lookups; $4.95 on Starter

Where SimilarTech wins

Searches for companies by the technologies they use, and contact lists built from technology signals.
Side-by-side comparisons of competitors' stacks, and alerts when a competitor changes its technologies.
A free browser extension.

What it costs

No public price; sold by quote

Short answer

SimilarTech prints no price on its site: every tool leads to a registration page with a 'Try for free' button, and its page does not mention an API. 1Lookup's Tech Stack Lookup costs 1 credit per site that answers, about $0.005 on Starter or $4.95 per 1,000, by API or CSV, and nothing when a site blocks the check. SimilarTech does what 1Lookup does not: search companies by technology and build contact lists.

1lookupvs

SimilarTech prints no price. 1Lookup prints $0.005 a site, 90% below BuiltWith's $0.0495.

The same answer for each site: its CMS, shop platform, analytics, marketing tools, hosting and frameworks, with versions. A site that blocks the check, does not exist or does not answer costs nothing.

1Lookup

$0.005

a site

a site that answers on the $99 Starter plan, down to $0.002 on larger plans

BuiltWith

$0.0495

a lookup

a lookup: $99 for 2,000 API credits, pay-as-you-go

90%

less for every website you look up

Websites you look up a month

20,000

5,000200,000

1Lookup$99 a month
BuiltWith$495 a month
Wappalyzer$450 a month

SimilarTech prints no price on its site, so it has no bar here: the bars are the two rivals that print one.

At 20,000 websites a month, 1Lookup is $396 a month less than BuiltWith: 80% less.

Starter at $99 a month covers up to 20,000 tech stack lookups. A site that blocks the check costs nothing, and credits you do not spend here work on every other 1Lookup lookup.

Start the 7-day free trial

What replaces what

Here is which 1Lookup product matches each SimilarTech job.

SimilarTech prints no unit price. 1Lookup bills one website and its technologies, in credits, only when the site answered with its home page, and nothing for a site that blocks the check, a name that does not exist or a site that does not answer.

A company's technologies by category
Tech Stack Lookup API
A domain, web address or email address in; the technologies the site runs on out, grouped, with versions where the site shows them, detected live from its headers, HTML and DNS, plus the email provider from MX. It reads one site at a time and does not search for companies by technology.
1 credit per site that answers, free when the site blocks the check, does not exist or does not answer

Side by side

Both products are measured on the same criteria, using SimilarTech's own published numbers.

Criteria	1lookup
Pricing model	Monthly plans with universal credits; core phone, email and IP lookups cost 1 credit, enrichment and intelligence products cost more	No price is printed on its site. It offers a breakdown of a company's website technologies by category, side-by-side stack comparisons, searches for companies by technology and contact lists by technology signal, each behind a sign-up, with a 'Try for free' button.
Starting price	$99/mo for 20,000 credits. At 1 credit each (Tech Stack Lookup API), that is $4.95 per 1,000 tech stack lookups on Starter, down to $2.00 on Enterprise.	Not published; quote-based
Free option	Free single lookups via the online tools at 1lookup.io/tools, no account required	None published
Free trial	7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise, with no payment today	A 'Try for free' button, with no trial length printed.
Do credits expire?	Unused monthly credits roll over for 3 months; separately purchased credits last 1 year	Not published

How you buy

This is how you buy from 1Lookup and from SimilarTech.

1lookup

How it is sold
Monthly plans with universal credits; core phone, email and IP lookups cost 1 credit, enrichment and intelligence products cost more
What it starts at
$99/mo for 20,000 credits
How you try it
7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise, with no payment today

How it is sold
No price is printed on its site
What it starts at
No public price; sold by quote
How you try it
A 'Try for free' button, with no trial length printed

A real result

This is what one 1Lookup result looks like.

Send a domain
POST a domain, a web address or an email address. It is cut down to the site's host name. An IP address or a private name is refused with a clear error and costs nothing.
We read the home page and DNS at once
1Lookup asks for the home page once and queries MX, TXT, NS and the www CNAME at the same time, with 10 seconds and 2 MB for the page. Internal addresses are refused, redirects included.
Get the stack, flat and grouped
Every technology arrives with its version, group and where it was seen, in one JSON payload. A site that answered bills 1 credit; a blocked or missing site bills nothing.

See the full product page

api.1lookup.io13 technologies

One call turns a domain into the stack its site runs on

Website: sample-shop.example.com
CMS: WordPress 7.2
Shop and payments: WooCommerce 11.4.0, Stripe
Analytics: Google Tag Manager, Google Analytics
Marketing: Klaviyo
Chat: Intercom
Hosting: Cloudflare, Nginx 1.25.3
Frameworks: PHP, MySQL, jQuery 3.7.1
Email provider: Google Workspace

200 OK, 1 creditShow

{
  "classification": {
    "found": true,
    "query": "sample-shop.example.com",
    "technology_count": 13,
    "cms": "WordPress 7.2",
    "ecommerce": "WooCommerce 11.4.0 | Stripe",
    "hosting": "Cloudflare | Nginx 1.25.3",
    "email_provider": "Google Workspace",
    "checked_at": "2026-10-26"
  },
  "metadata": { "credits_used": 1 }
}

Try the Free Tech Stack Checker, one of 1Lookup's free tools.

Run one lookup in your browser and see the result before you decide.

Open the free tool

The evidence

Here is the evidence behind every number on this page.

1Lookup

Source: 1lookup.io homepage, captured August 2026

SimilarTech

Source: similartech.com homepage, captured October 2026

SimilarTech pricing and product facts verified against similartech.com as of October 2026. Prices change, so confirm on the vendor’s site. 1Lookup numbers come from the live rate card.

Who it is for

Pick 1Lookup or stay with SimilarTech depending on the job in front of you.

1lookup

Choose 1Lookup if

you want a price you can read before you sign up, an API that answers for one site or a whole CSV, and nothing charged when a site blocks the check.

SimilarTech

Consider SimilarTech instead if

you want to search for companies by the technologies they use, contact lists built from technology signals, or side-by-side comparisons of competitors' stacks, and you are ready to talk about the price after signing up.

Questions

People ask these questions before they switch from SimilarTech.

How much does SimilarTech cost?

No price is printed on its site. Its tools, from a company's technology breakdown to contact lists by technology, lead to a registration page, and the main button says 'Try for free' with no trial length printed. Checked October 2026.

How much does 1Lookup charge for a tech stack lookup?

1 credit per site that answers, free when the site blocks the check, does not exist or does not answer. On the Starter plan ($99 a month for 20,000 credits) a site is about $0.005, which covers 20,000 lookups a month and is $4.95 per 1,000. At the Enterprise end of the rate card it is about $0.002.

Is 1Lookup cheaper than SimilarTech?

That cannot be said, because SimilarTech prints no price to set beside it. What can be compared is the printed market: BuiltWith's pay-as-you-go pack is $0.0495 a domain and Wappalyzer's Pro plan $0.05 a lookup, against about half a cent on 1Lookup.

Does SimilarTech have an API?

Its page does not mention one. 1Lookup's Tech Stack Lookup is an API from the first plan, with flat fields made for a CRM column, a structured list for code and a CSV upload for a whole list.

Where does SimilarTech beat 1Lookup?

On search and lists. SimilarTech finds companies by the technologies they use, builds contact lists from technology signals, compares competitors' stacks side by side and alerts you when a competitor changes its technologies. 1Lookup reads the stack of a site you already have.

When is a 1Lookup tech stack lookup free?

When the site blocks the check, when the name does not exist, when the site has no home page, and when it does not answer in time. Each costs 0 credits. Only a site that answered with its home page is billed.

What is the best SimilarTech alternative?

If you want to search for companies by technology or build contact lists, SimilarTech is built for that. If you want the stacks of the sites you already have, with a price you can read before you sign up, 1Lookup's Tech Stack Lookup is about $0.005 a site.

Is SimilarTech worth it in 2026?

Ask for the price after signing up and weigh it against its search and contact lists. For one site, or a list you already have, compare the printed half a cent a site on 1Lookup.

1lookup

Look up a website and see what it runs on

Try 1Lookup free for 7 days and compare it with SimilarTech on your own work.

1 credit a site that answers, about $0.005 on Starter, free when a site blocks the check, on the same balance as phone, email and company lookups. Start with the 7-day free trial.

Start the 7-day free trial See per-lookup pricing

SimilarTech prints no price on its site, and 1Lookup reads what a website runs on for $0.005 a site that answers, by API or a CSV upload.

Here is where 1Lookup wins against SimilarTech, and where SimilarTech still wins.

SimilarTech prints no price. 1Lookup prints $0.005 a site, 90% below BuiltWith's $0.0495.

Here is which 1Lookup product matches each SimilarTech job.

Tech Stack Lookup API

Both products are measured on the same criteria, using SimilarTech's own published numbers.

This is how you buy from 1Lookup and from SimilarTech.

This is what one 1Lookup result looks like.

Try the Free Tech Stack Checker, one of 1Lookup's free tools.

Here is the evidence behind every number on this page.

Pick 1Lookup or stay with SimilarTech depending on the job in front of you.

People ask these questions before they switch from SimilarTech.

Try 1Lookup free for 7 days and compare it with SimilarTech on your own work.

Keep researching SimilarTech with the matching 1Lookup pages.