Datacircle

Serpel pricing: related keywords API

Serpel's siteThis page as plain textRelated keywords API: the 9 best providers comparedSerpel: related keywords API alternatives

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100% complete: all 6 fields on our checklistSee the 6 fields
$0.00per 1,000 keywordsWe haven't run Serpel through our related keywords API benchmark yet.This plan is free. We rank 226 plans for related keywords APIs by price. Half the plans cost $0.596 per 1,000 keywords or less. See the best free related keywords API plan.Keys.so's ₽34,900 (about $417) monthly plan is the cheapest paid plan per 1,000 keywords. Keys.so's ₽34,900 (about $417) monthly plan charges nothing per call. You get as many keywords as Keys.so's rate limit allows.seodata.dev's $4.99 monthly plan covers any number of keywords. seodata.dev's $4.99 monthly plan costs less up front than Keys.so's ₽34,900 (about $417) monthly plan.Bing Webmaster Tools, DataForSEO and Mangools are the best related keywords API providers in the Datacircle benchmark.
Type a number to see the cheapest Serpel plan for that many keywords. The table below then sorts the other plans by what each costs.
Plan: Free one of Serpel's 7 plans
Call: POST /keywords/research Serpel's only call for this API
API: Related keywords API one of Serpel's 5 APIs

About this item

  • A copy at most 7 days old. You get keyword data from Serpel's database.
  • All 6 fields on our checklist. Search volume, Monthly trend, Cost per click, Competition, Keyword difficulty, Search intent.
  • Nothing to pay. You get 100 credits once, enough for 25 pages. Calls stop once your credits run out. Credits never expire.
  • One call. You send keyword to POST /keywords/research. You set mode to "keyword". You can also send country, language, limit and the Idempotency-Key header. The call returns keywords like the one you send.
  • Who can get it: anyone aged 18 or older with full legal capacity, as a consumer or a business. Keep data: no limit. Use data: with conditions.

Serpel: related keywords API alternatives

Serpel alternatives: other related keywords API providers by price

The table starts with Serpel's cheapest paid plan. Next come plans from other providers with the price per 1,000 keywords closest to Serpel's. Each plan in the table gives live data or data at most a week old.

Serpel, €49 monthlyDataForSEO, top-up from $50, Pay as you go, POST /v3/keywords_data/bing/keywords_for_keywords/liveOpenRush, top-up from $10QuanticData, $79 monthlyOutlierKit, $1,999 yearly
$ per 1,000 keywords$0.735$0.03$0.15$0.253$0.833
Completeness100%67%17%0%33%
Billingmonthlypay firstpay firstmonthlyyearly
Pay€49$50$10$79$1,999
Enough for1,500 pages a monthabout 555 pagesabout 333 pages312,500 results a month1,000 pages a month
Freshness7 dayslive1 daylivelive
Who can get itanyone aged 18 or older with full legal capacity, as a consumer or a businessanyone not in Russia, Belarus, Cuba, Iran, Syria, Myanmar, North Korea or Russian-occupied Ukraineanyone at least 18 years old and legally able to enter into the terms, for business, professional or organizational useanyoneanyone

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-07.

  1. serpel.app/docs/api
  2. serpel.app/docs/credits-and-billing
  3. serpel.app/docs/keyword-research
  4. serpel.app/llms.txt
  5. serpel.app/pricing
  6. serpel.app/terms

Product details

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

  • Search volume
  • Monthly trend
  • Cost per click
  • Competition
  • Keyword difficulty
  • Search intent
Price
$ per 1,000 keywords$0.00
Perpage of 50
Billingfree
Charges
Start fee$0.00
Also pays forfrom the same budget: Rank check right now · ChatGPT answer check · Google AI Overview check · Keyword research for a domain · List research · Site crawl · Monitoring run
Overage
Units caphard
Not found
$ per 1,000$0.00
In their words
Their pitchStarts from one seed keyword or topic. Combines keyword suggestions with related keywords, the seed first and then by search volume.
Data
Freshness7 days
Keep datano limit
Use data§ 11 (1) "[...] the non-exclusive, non-transferable right to use Serpel within the scope of these terms." (2) "You use Serpel lawfully only. You do not bypass technical limits such as rate limits or plan limits, you do not put excessive load on the systems and you do not pass on your login details. [...]" (3) "You may have only websites checked and crawled that you own or are authorised to check, for example websites of clients that you look after. [...]" (4) "[...] Do not enter data that you are not authorised to use. [...]"
Plan
Pay€0
You get100 credits
Enough for25 pages, once
Expiresnever
Rate limit
Per second0.5
Batch1
Speed
Answerin the call
The call
You sendmode "keyword", keyword. Optional: country, language, limit, Idempotency-Key header
MethodPOST
Path/keywords/research
About the plan
PlanFree
Who can get itanyone aged 18 or older with full legal capacity, as a consumer or a business
The 10 fields the plan's answer can hold

keyword, location code, language code, search volume, monthly searches, cost per click, keyword difficulty, main intent, competition, competition level

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