# Gapup, pay as you go: Similar companies API

> As a CMO, discover 50 B2B accounts that closely match your top 10 customers' tech stacks and firmographics.

Gapup's x402 plan for the similar companies API costs $0.60 per 1,000 companies. We check each provider's docs for 13 fields. Gapup's docs list 4: Industry and type, Employees, Revenue, Domain.
We haven't run Gapup through [our similar companies API benchmark](https://datacircle.dev/best-similar-companies-api.txt) yet.
We rank 162 plans for similar companies APIs by price. Half the plans cost $1.068 or less per 1,000 companies. This plan costs less per 1,000 companies than 59% of the 162 plans.
[GovConAPI's $39 monthly plan](https://datacircle.dev/similar-company-apis/govconapi/39-monthly/llms.txt) is the cheapest paid plan per 1,000 companies. GovConAPI's plan covers companies in the United States only. GovConAPI's $39 monthly plan charges nothing per call. You get as many companies as GovConAPI's rate limit allows. [Tomba's pay-as-you-go plan](https://datacircle.dev/similar-company-apis/tomba/pay-as-you-go/llms.txt) costs the least for 10,000 companies a month: $1.25.
[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 more up front than GovConAPI's $39 monthly plan.
[ScrapeAtlas](https://datacircle.dev/similar-company-apis/scrapeatlas/19-pack/llms.txt), [LeadMagic](https://datacircle.dev/similar-company-apis/leadmagic/499-monthly-professional-post-v3-companies-lookalike/llms.txt) and [Findymail](https://datacircle.dev/similar-company-apis/findymail/249-monthly/llms.txt) are the best similar companies API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/similar-company-apis/gapup/pay-as-you-go
- [Similar companies API in 2026: the best of 20+ compared](https://datacircle.dev/best-similar-companies-api.txt)
- Get it: https://mcp.gapup.io/docs/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- Request: `POST https://mcp.gapup.io/api/v1/call/abm_lookalike_account_finder`
- API key: not needed
- Its API docs: https://mcp.gapup.io/docs/tools/abm_lookalike_account_finder?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- Sold by: Gapup (https://mcp.gapup.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 31%
- Industry and type: ✓
- Employees: ✓
- Revenue: ✓
- Domain: ✓

## Price

- $ per 1,000 companies: $0.60
- Per: page of 50
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: As a CMO, discover 50 B2B accounts that closely match your top 10 customers' tech stacks and firmographics.

## Data

- Keep data: no limit
- Use data: Authorized: legitimate AI agents, B2B integrations, security testing on owned assets, research, educational use. Prohibited: violation of applicable law, mass automated outreach without consent, circumventing rate limits, reverse-engineering for cloning, scraping catalog for competing products, fraud, mass-targeted attacks

## Plan

- Pay: per call

## Rate limit

- Per second: 1
- Batch: 10

## Speed

- Answer: in the call or by polling

## The call

- You send: args.top_customer_domains. Optional: args.firmographic_filters.industry, args.firmographic_filters.employee_range, args.firmographic_filters.revenue_range, args.firmographic_filters.geo_region, args.tech_stack_keywords, args.async
- Method: POST
- Path: /api/v1/call/abm_lookalike_account_finder

## About the plan

- Plan: x402
- Who can get it: anyone

## The 9 fields the plan's answer can hold

domain, company name, industry, employee count, revenue estimate, tech stack match score, firmographic match score, confidence score, matched technologies

## Gapup's plans (1)

- [Gapup, pay as you go](https://datacircle.dev/similar-company-apis/gapup/pay-as-you-go/llms.txt): $0.60 per 1,000, 31% complete

## Gapup's calls for this API (1)

- `POST /api/v1/call/abm_lookalike_account_finder`: [Gapup, pay as you go](https://datacircle.dev/similar-company-apis/gapup/pay-as-you-go/llms.txt)

## Gapup's APIs (6)

- [Gapup: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/gapup/pay-as-you-go/llms.txt)
- [Gapup: similar companies API pricing, 1 plan](https://datacircle.dev/similar-company-apis/gapup/pay-as-you-go/llms.txt)
- [Gapup: tech stack API pricing, 1 plan](https://datacircle.dev/company-technology-apis/gapup/pay-as-you-go/llms.txt)
- [Gapup: keyword research API pricing, 1 plan](https://datacircle.dev/keyword-research-apis/gapup/pay-as-you-go/llms.txt)
- [Gapup: web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/gapup/pay-as-you-go/llms.txt)
- [Gapup: web search API pricing, 1 plan](https://datacircle.dev/web-search-apis/gapup/pay-as-you-go/llms.txt)

## Gapup: similar companies API alternatives

- [AI Ark, $79 monthly](https://datacircle.dev/similar-company-apis/ai-ark/79-monthly/llms.txt): $0.527 per 1,000, 77% complete, 30 days
- [Tomba, $441 yearly](https://datacircle.dev/similar-company-apis/tomba/441-yearly/llms.txt): $0.588 per 1,000, 15% complete, stored
- [LeadMagic, $249 monthly, Growth, POST /v3/companies/lookalike](https://datacircle.dev/similar-company-apis/leadmagic/249-monthly-growth-post-v3-companies-lookalike/llms.txt): $0.623 per 1,000, 92% complete
- [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

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-10.

- https://mcp.gapup.io/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://mcp.gapup.io/api/v1/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://mcp.gapup.io/api/v1/tools/abm_lookalike_account_finder?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://mcp.gapup.io/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://mcp.gapup.io/docs/legal/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://mcp.gapup.io/docs/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing
- https://mcp.gapup.io/docs/tools/abm_lookalike_account_finder?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=similar-companies-api-pricing