# Upspring, free, GET /v1/advertisers/{id}/similar: Similar companies API

> Ranked by creative/market similarity — the advertisers competing for the same audience with comparable creative strategies.

Upspring's similar companies API on its Free plan. It costs $0.00 per 1,000 companies. It returns 1 of the 13 key fields we check: Match.
We haven't run Upspring through [our similar companies API benchmark](https://datacircle.dev/best-similar-companies-api.txt) yet.
This plan is free. We rank 120 plans for similar companies APIs by price. Half the plans cost $1.265 per 1,000 companies or less.
[PublicWWW's $499 monthly plan](https://datacircle.dev/similar-company-apis/publicwww/499-monthly/llms.txt) costs the least per 1,000 companies: $0.000055. PublicWWW charges for each page of results. We count 1,000,000 companies on each page to get the $0.000055 price.
[ZoomInfo's $45 pack](https://datacircle.dev/similar-company-apis/zoominfo/45-pack/llms.txt) covers any number of companies. ZoomInfo's $45 pack costs less up front than PublicWWW's $499 monthly plan.
[LeadMagic](https://datacircle.dev/similar-company-apis/leadmagic/499-monthly-professional-post-v3-companies-lookalike/llms.txt), [Tomba](https://datacircle.dev/similar-company-apis/tomba/449-monthly/llms.txt) and [Social Fetch](https://datacircle.dev/similar-company-apis/social-fetch/14-pack/llms.txt) are the best similar companies API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/similar-company-apis/upspring/free-get-v1-advertisers-id-similar
- [Similar companies API: 9 providers compared](https://datacircle.dev/best-similar-companies-api.txt)
- Get it: https://www.upspring.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- Request: `GET https://public-api.upspring.ai/v1/advertisers/{id}/similar`
- API key: with the plan, on https://www.upspring.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- Its API docs: https://public-api.upspring.ai/v1/docs/ui?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing#tag/advertisers/GET/v1/advertisers/{id}/similar
- Sold by: Upspring (https://www.upspring.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 8%
- Match: ✓

## Price

- $ per 1,000 companies: $0.00
- Billing: free

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Ranked by creative/market similarity — the advertisers competing for the same audience with comparable creative strategies.

## Data

- Keep data: no limit
- Use data: A limited, non-exclusive, non-transferable, revocable license [...] for the sole purpose of enabling you to use and enjoy the benefit of the Service for your internal business purposes, in the manner permitted by these Terms. [...] Competitors and individuals developing similar or competing services are prohibited from accessing the Service without our prior written consent. [...] You will not, and will not permit any third party to: Interfere with the Service or disrupt, overburden, damage, or impair its functioning, Reverse engineer, disassemble, decompile, or copy any portion of the Service, Attempt to gain unauthorized access to the Service or its related systems, Use bots, scrapers, or automated methods to access or extract data without permission, Use the Service to transmit unlawful, harmful, or harassing content, Impersonate any person or entity. [...] If Upspring's features allow you to access or use third-party content, you acknowledge that such content may be protected by others' intellectual property rights and agree not to use it in a manner that infringes those rights.

## Plan

- Pay: $0
- You get: 150 credits a month

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: id. Optional: limit
- Method: GET
- Path: /v1/advertisers/{id}/similar

## About the plan

- Plan: Free
- Who can get it: anyone

## The 4 fields the plan's answer can hold

advertiser ID, name, similarity score, rank

## Upspring's plans (4)

- [Upspring, free, GET /v1/advertisers/{id}/similar](https://datacircle.dev/similar-company-apis/upspring/free-get-v1-advertisers-id-similar/llms.txt): $0.00 per 1,000, 8% complete
- [Upspring, $149 monthly, Starter, GET /v1/advertisers/{id}/similar](https://datacircle.dev/similar-company-apis/upspring/149-monthly-starter-get-v1-advertisers-id-similar/llms.txt): 8% complete
- [Upspring, $349 monthly, Growth, GET /v1/advertisers/{id}/similar](https://datacircle.dev/similar-company-apis/upspring/349-monthly-growth-get-v1-advertisers-id-similar/llms.txt): 8% complete
- [Upspring, contact us, Enterprise, GET /v1/advertisers/{id}/similar](https://datacircle.dev/similar-company-apis/upspring/contact-us-enterprise-get-v1-advertisers-id-similar/llms.txt): 8% complete

## Upspring's calls for this API (2)

- `GET /v1/advertisers/{id}/peers`: [Upspring, free, GET /v1/advertisers/{id}/peers](https://datacircle.dev/similar-company-apis/upspring/free-get-v1-advertisers-id-peers/llms.txt)
- `GET /v1/advertisers/{id}/similar`: [Upspring, free, GET /v1/advertisers/{id}/similar](https://datacircle.dev/similar-company-apis/upspring/free-get-v1-advertisers-id-similar/llms.txt)

## Upspring's APIs (7)

- [Upspring: Facebook Ad Library API pricing, 4 plans](https://datacircle.dev/facebook-ad-apis/upspring/free/llms.txt)
- [Upspring: Google Ads Transparency API pricing, 4 plans](https://datacircle.dev/google-ad-apis/upspring/free/llms.txt)
- [Upspring: LinkedIn Ad Library API pricing, 4 plans](https://datacircle.dev/linkedin-ad-apis/upspring/free/llms.txt)
- [Upspring: TikTok Ad Library API pricing, 4 plans](https://datacircle.dev/tiktok-ad-apis/upspring/free/llms.txt)
- [Upspring: company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/upspring/free/llms.txt)
- [Upspring: company enrichment API pricing, 4 plans](https://datacircle.dev/company-enrichment-apis/upspring/free/llms.txt)
- [Upspring: similar companies API pricing, 4 plans, GET /v1/advertisers/{id}/similar](https://datacircle.dev/similar-company-apis/upspring/free-get-v1-advertisers-id-similar/llms.txt)

## Upspring: similar companies API alternatives

- [Tomba, free](https://datacircle.dev/similar-company-apis/tomba/free/llms.txt): $0.00 per 1,000, 15% complete, stored
- [Social Fetch, free](https://datacircle.dev/similar-company-apis/social-fetch/free/llms.txt): $0.00 per 1,000, 46% complete, live
- [ZenRows, free (agent storefront)](https://datacircle.dev/similar-company-apis/zenrows/free-agent-storefront/llms.txt): $0.00 per 1,000, 23% complete, live
- [The Companies API, free](https://datacircle.dev/similar-company-apis/the-companies-api/free/llms.txt): $0.00 per 1,000, 92% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-04.

- https://public-api.upspring.ai/v1/docs/ui?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://www.upspring.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://www.upspring.ai/privacy-policy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://www.upspring.ai/rest?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://www.upspring.ai/terms-of-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing