# Implisense, free, POST /v2/similar: Similar companies API

> Find companies semantically similar to one or more seed companies using embedding similarity.

Implisense's similar companies API on its Free plan. It costs $0.00 per 1,000 companies. It returns 2 of the 13 key fields we check: Match, Headquarters.
We rank 107 plans by price. [Cleanlist's $89 monthly plan](https://datacircle.dev/similar-company-apis/cleanlist/89-monthly/llms.txt) costs the least per 1,000 companies: as little as $0.00034. Cleanlist's $89 monthly plan covers up to 2,592,000 pages a month at no extra cost. Each page holds 100 companies.
[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 to start than Cleanlist's $89 monthly plan.
[LeadMagic](https://datacircle.dev/similar-company-apis/leadmagic/499-monthly-professional-post-v3-companies-lookalike/llms.txt), [Extruct](https://datacircle.dev/similar-company-apis/extruct/149-monthly-pro-post-v1-companies-company-identifier-similar/llms.txt) and [DiscoLike](https://datacircle.dev/similar-company-apis/discolike/99-monthly/llms.txt) are the best similar companies API providers in our benchmark.

- This page: https://datacircle.dev/similar-company-apis/implisense/free-post-v2-similar
- [Best similar companies API in 2026](https://datacircle.dev/best-similar-companies-api.txt)
- Get it: https://implisense.com/en/pricing
- Request: `POST https://api.implisense.com/v2/similar`
- API key: with the plan, on https://implisense.com/en/pricing
- Its API docs: https://api.implisense.com/v2/docs#tag/search/POST/v2/similar
- Sold by: Implisense (https://implisense.com)
- Checked: 2026-10-25

## In the answer

- Completeness: 15%
- Match: ✓
- Headquarters: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: page of 1,000
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Get company profile · Search companies · Search companies (structured) · Find peer companies · Start a contact search · Check for changes since a timestamp · Find nearby companies (geo proximity) · List company's persons · List announcements · List person's companies · Get financial statements · Batch resolve companies

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Find companies semantically similar to one or more seed companies using embedding similarity.

## Data

- Freshness: 1 day
- Keep data: for the term of the contract: the customer may store retrieved data in their own systems, to the extent required for their own use, for the traceability of their results and for their retention obligations
- Use data: For the term of the contract the customer receives a non-exclusive, non-transferable and non-sublicensable right to use the platform and the data retrieved for their own business purposes [...] The following go beyond the right of use under paragraph 1 and require our prior written consent: passing on or reselling the data as such to third parties, in so far as this goes beyond individual items in an analysis addressed to a specific recipient, extracting or re-utilising a part of our database that is substantial in nature or extent, and the repeated and systematic extraction of insubstantial parts (§ 87b UrhG, German Copyright Act), building one's own or a third party's data holding that substantially reproduces our records in nature or extent, the training or fine-tuning of models on a body of data that comprises a part of our database substantial in nature or extent. [...] The following are prohibited in addition: systematically extracting the platform beyond the API provided for that purpose, for instance by automated retrieval of the web pages, passing credentials or API keys to third parties, and use by several people under one account, any use liable to impair the operation of the platform significantly. The customer may use contact details found only within applicable law, in particular data protection and competition law. The customer is responsible for the lawfulness of their outreach.

## Plan

- Pay: €0
- You get: 25 credits a month
- Enough for: about 12 pages a month
- Expires: never while the contract is in force

## Rate limit

- Per second: 0.33
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: seeds. Optional: filters.locations, filters.industries, filters.sizes, filters.minAge, filters.maxAge, filters.companyIds, filters.activeOnly, offset, limit
- Method: POST
- Path: /v2/similar

## About the plan

- Plan: Free
- Who can get it: businesses (§ 14 BGB), legal entities under public law and special funds under public law, not consumers

## The 6 fields the plan's answer can hold

ID, name, ZIP code, city, active, similarity score

## Implisense's plans (6)

- [Implisense, free, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/free-post-v2-similar/llms.txt): $0.00 per 1,000, 15% complete, 1 day
- [Implisense, €49 pack, 500 Implicents, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/49-pack-500-implicents-post-v2-similar/llms.txt): $0.221 per 1,000, 15% complete, 1 day
- [Implisense, €169 pack, 2,000 Implicents, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/169-pack-2000-implicents-post-v2-similar/llms.txt): $0.191 per 1,000, 15% complete, 1 day
- [Implisense, €379 pack, 5,000 Implicents, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/379-pack-5000-implicents-post-v2-similar/llms.txt): $0.171 per 1,000, 15% complete, 1 day
- [Implisense, €59 monthly, Plus, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/59-monthly-plus-post-v2-similar/llms.txt): $0.664 per 1,000, 15% complete, 1 day
- [Implisense, contact us, Enterprise, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/contact-us-enterprise-post-v2-similar/llms.txt): 15% complete, 1 day

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

- `GET /v2/companies/{id}/peers`: [Implisense, free, GET /v2/companies/{id}/peers](https://datacircle.dev/similar-company-apis/implisense/free-get-v2-companies-id-peers/llms.txt)
- `POST /v2/similar`: [Implisense, free, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/free-post-v2-similar/llms.txt)

## Implisense's APIs (5)

- [Implisense: people search API pricing, 6 plans](https://datacircle.dev/people-search-apis/implisense/free/llms.txt)
- [Implisense: people enrichment API pricing, 6 plans](https://datacircle.dev/person-enrichment-apis/implisense/free/llms.txt)
- [Implisense: company enrichment API pricing, 6 plans, POST /v2/companies/batch/resolve](https://datacircle.dev/company-enrichment-apis/implisense/free-post-v2-companies-batch-resolve/llms.txt)
- [Implisense: company enrichment API pricing, 6 plans, GET /v2/companies/{id}](https://datacircle.dev/company-enrichment-apis/implisense/free-get-v2-companies-id/llms.txt)
- [Implisense: company enrichment API pricing, 6 plans, POST /v2/companies/resolve](https://datacircle.dev/company-enrichment-apis/implisense/free-post-v2-companies-resolve/llms.txt)
- [Implisense: company enrichment API pricing, 6 plans, GET /v2/resolve/{query}](https://datacircle.dev/company-enrichment-apis/implisense/free-get-v2-resolve-query/llms.txt)
- [Implisense: company enrichment API pricing, 6 plans, POST /v2/resolve](https://datacircle.dev/company-enrichment-apis/implisense/free-post-v2-resolve/llms.txt)
- [Implisense: company discovery API pricing, 6 plans, GET /v2/companies/{id}/nearby](https://datacircle.dev/company-discovery-apis/implisense/free-get-v2-companies-id-nearby/llms.txt)
- [Implisense: company discovery API pricing, 6 plans, GET /v2/search](https://datacircle.dev/company-discovery-apis/implisense/free-get-v2-search/llms.txt)
- [Implisense: company discovery API pricing, 6 plans, POST /v2/search](https://datacircle.dev/company-discovery-apis/implisense/free-post-v2-search/llms.txt)
- [Implisense: similar companies API pricing, 6 plans, POST /v2/similar](https://datacircle.dev/similar-company-apis/implisense/free-post-v2-similar/llms.txt)

## Implisense: similar companies API alternatives

- [EnvoAPI, $299 pack, Pro top-up, GET /v1/companies/similar/by-url](https://datacircle.dev/similar-company-apis/envoapi/299-pack-pro-top-up-get-v1-companies-similar-by-url/llms.txt): $0.15 per 1,000, 15% complete, live
- [gtm-api.com, $250 monthly](https://datacircle.dev/similar-company-apis/gtm-api-com/250-monthly/llms.txt): $0.167 per 1,000, 31% complete, live
- [NeuralVerge, $50 monthly](https://datacircle.dev/similar-company-apis/neuralverge/50-monthly/llms.txt): $1.00 per 1,000, 62% complete, live
- [Pubrio, $495 pack](https://datacircle.dev/similar-company-apis/pubrio/495-pack/llms.txt): $1.08 per 1,000, 62% complete, 1 day

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-25.

- https://api.implisense.com/v2/docs
- https://api.implisense.com/v2/openapi.json
- https://app.implisense.com/agb
- https://implisense.com/en/pricing
- https://implisense.com/en/products/api