# SEMSTORM, free: Related keywords API

> You will be able to get keywords suggestions, but without keywords, statistics like search volume, CPC, competition, and trends.

SEMSTORM's related keywords API on its Free trial plan. It costs $0.00 per 1,000 keywords. SEMSTORM's docs list none of the 6 key fields we check: Search volume, Monthly trend, Cost per click, Competition and 2 more.
SEMSTORM limits how many results you get but gives no number.
We haven't run SEMSTORM through [our related keywords API benchmark](https://datacircle.dev/best-related-keywords-api.txt) yet.
This plan is free. We rank 194 plans for related keywords APIs by price. Half the plans cost $0.60 per 1,000 keywords or less.
[Keys.so's ₽34,900 monthly plan](https://datacircle.dev/related-keywords-apis/keys-so/34900-monthly/llms.txt) is the cheapest paid plan per 1,000 keywords. Keys.so's ₽34,900 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](https://datacircle.dev/related-keywords-apis/seodata-dev/4-99-monthly/llms.txt) covers any number of keywords. seodata.dev's $4.99 monthly plan costs less up front than Keys.so's ₽34,900 monthly plan.
[Bing Webmaster Tools](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free/llms.txt), [DataForSEO](https://datacircle.dev/related-keywords-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-ideas-live/llms.txt) and [Mangools](https://datacircle.dev/related-keywords-apis/mangools/15-monthly/llms.txt) are the best related keywords API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/related-keywords-apis/semstorm/free
- [Related keywords API: the 7 best providers compared](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://app.semstorm.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: Docs behind sign-up
- API key: with the plan, on https://app.semstorm.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Its API docs: https://app.semstorm.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Sold by: SEMSTORM (https://semstorm.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 0%

## Price

- $ per 1,000 keywords: $0.00
- Per: result
- Billing: free

## Charges

- Start fee: $0.00
- Also pays for: Rank tracking API · Domain analysis API

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: You will be able to get keywords suggestions, but without keywords, statistics like search volume, CPC, competition, and trends.

## Data

- Keep data: no limit
- Use data: Dział VII: "Usługobiorca może korzystać z API SEMSTORM na podstawie otrzymanego klucza dostępnego w wybranych Usługach wyłącznie w czasie trwania zamówionej Usługi." [...] "W przypadku wykorzystania danych pozyskanych za pomocą API do budowy konkurencyjnego systemu Usługodawca ma prawo wypowiedzieć Usługobiorcy Umowę w trybie natychmiastowym." [...] "Usługobiorca może publikować dane pozyskane za pomocą API SEMSTORM w środkach masowego przekazu jedynie z jednoczesnym podaniem źródła pochodzenia tych danych i uzyskaniem od Usługodawcy pisemnej zgody na taką publikację." (Regulamin, app.semstorm.com/legal)

## Plan

- Pay: $0
- Expires: 14 days

## The call

- You send: Docs behind sign-up

## About the plan

- Plan: Free trial
- Who can get it: anyone

## The only field the plan's answer can hold

keyword

## SEMSTORM's plans (4)

- [SEMSTORM, free](https://datacircle.dev/related-keywords-apis/semstorm/free/llms.txt): $0.00 per 1,000, 0% complete
- [SEMSTORM, PLN 249 monthly](https://datacircle.dev/related-keywords-apis/semstorm/pln-249-monthly/llms.txt): 0% complete
- [SEMSTORM, PLN 599 monthly](https://datacircle.dev/related-keywords-apis/semstorm/pln-599-monthly/llms.txt): 0% complete
- [SEMSTORM, PLN 899 monthly](https://datacircle.dev/related-keywords-apis/semstorm/pln-899-monthly/llms.txt): 0% complete

## SEMSTORM's calls (1)

- Docs behind sign-up: [SEMSTORM, free](https://datacircle.dev/related-keywords-apis/semstorm/free/llms.txt)

## SEMSTORM's APIs (3)

- [SEMSTORM: ranked keywords API pricing, 4 plans](https://datacircle.dev/ranked-keywords-apis/semstorm/free/llms.txt)
- [SEMSTORM: related keywords API pricing, 4 plans](https://datacircle.dev/related-keywords-apis/semstorm/free/llms.txt)
- [SEMSTORM: SERP API pricing, 4 plans](https://datacircle.dev/serp-apis/semstorm/free/llms.txt)

## SEMSTORM: related keywords API alternatives

- [Bing Webmaster Tools, free](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free/llms.txt): $0.00 per 1,000, 17% complete
- [DataForSEO, free, $1 trial credit, POST /v3/dataforseo_labs/google/keyword_ideas/live](https://datacircle.dev/related-keywords-apis/dataforseo/free-1-trial-credit-post-v3-dataforseo-labs-google-keyword-ideas-live/llms.txt): $0.00 per 1,000, 100% complete, 1 month
- [Mangools, free](https://datacircle.dev/related-keywords-apis/mangools/free/llms.txt): $0.00 per 1,000, 83% complete
- [SE Ranking, free trial, GET /v1/keywords/questions](https://datacircle.dev/related-keywords-apis/se-ranking/free-trial-get-v1-keywords-questions/llms.txt): $0.00 per 1,000, 100% complete, 1 month

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-06.

- https://app.semstorm.com/legal?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://app.semstorm.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://app.semstorm.com/privacy-policy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://semstorm.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing