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WhatCMS pricing and alternatives: tech stack API, GET /API/Theme

WhatCMS's sitellms.txtBest tech stack API in 2026

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0% complete: none of the 13 key fields we checkSee the 13 fields
$0.00per 1,000 companiesWe rank 193 plans by price. Botoi's $199 monthly plan costs the least per 1,000 companies: as little as $0.0066. Botoi's $199 monthly plan covers up to 1,000,000 companies a day.Store Leads's $250 monthly plan (/json/api/v1/all/domain/bulk) covers any number of companies. Store Leads's $250 monthly plan costs more to start than Botoi's $199 monthly plan.JobsPipe, Botoi and DetectZeStack are the best tech stack API providers in our benchmark.
Plan: 500 Detections one of WhatCMS's 14 plans
Call: GET /API/Theme one of WhatCMS's 3 calls
API: Tech stack API WhatCMS's only API

About this item

  • Stored. You get technologies from WhatCMS's database. WhatCMS doesn't say how old the data is.
  • None of the 13 key fields we check: Technology, Categories, When and where seen, Spend and 9 more.
  • Nothing to pay. You get 500 requests a month.
  • One call. You send url to GET /API/Theme. The call returns the technologies the company uses.
  • Who can get it: anyone with an account, one account each. Keep data: for caching purposes only. Use data: with conditions.

WhatCMS: tech stack API alternatives

The table starts with WhatCMS's cheapest paid plan. Next come plans from other providers with the price per 1,000 companies closest to WhatCMS's. Each plan in the table gives stored data.

WhatCMS, $800 monthly, 1,000,000 Detections, GET /API/ThemeTomba, $1,791 yearlyDetectZeStack, $79 monthly, Mega, GET /changesThe Swarm, $96,000 yearlyTechnologyChecker, $2,490 yearly, Scale, GET /v1/domain/{domain}/history
$ per 1,000 companies$0.80$1.244$1.58$4.00$4.15
Completeness0%15%15%38%23%
Billingmonthlyyearlymonthlyyearlyyearly
Pay$800$1,791$79$96,000$2,490
Enough for1,000,000 calls a month120,000 calls a month50,000 calls a month24,000,000 results a year50,000 calls a month
Freshnessstoredstoredstoredstoredstored
Who can get itanyone with an account, one account eachanyone 18 or overanyone with an account (a valid email address)anyone over 18anyone 18 or over

Every tech stack API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-27.

  1. whatcms.org
  2. whatcms.org/API/Plans
  3. whatcms.org/Documentation
  4. whatcms.org/Support
  5. whatcms.org/Terms
  6. themedetect.com/Support

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Technology, not in the answer
  • Categories, not in the answer
  • When and where seen, not in the answer
  • Spend, not in the answer
  • Apps, not in the answer
  • About, not in the answer
  • Size, not in the answer
  • Places, not in the answer
  • Traffic, not in the answer
  • Rank, not in the answer
  • Contact, not in the answer
  • Social, not in the answer
  • Reviews, not in the answer
Price
$ per 1,000 companies$0.00
Percall
Billingfree
Aggregators
Aggregatorsnone
Charges
Also pays forfrom the same budget: Technology Detection · Host Detection
Not found
$ per 1,000$0.00
In their words
Their pitchDetect which theme WordPress sites are using
Data
Freshnessstored
Keep datafor caching purposes only
Use dataYou may view, download for caching purposes only, and print pages from the website, provided that: (a) you must not republish material from this website (including republication on another website), or reproduce or store material from this website in any public or private electronic retrieval system, (b) you must not reproduce, duplicate, copy, sell, resell, visit, or otherwise exploit our website or material on our website for a commercial purpose, without our express written consent [...] you agree not to reproduce, duplicate, copy, sell, resell or exploit for any commercial purposes, any aspect of the Service
Plan
Pay$0
You get500 requests a month
Enough for500 calls a month
Rate limit
Per second0.1
Batch1
Speed
Answerin the call
Median4.34 s
The call
You sendurl
MethodGET
Path/API/Theme
About the plan
Plan500 Detections
Who can get itanyone with an account, one account each
The 14 fields the plan's answer can hold

request URL, result code, result message, last checked, theme URI, theme name, theme author, theme author URI, theme version, theme license, theme license URI, theme template, theme description, theme tags

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