# Loopster, free: Reverse email lookup API

> Free first-party lookups from Loopster's own contact database

Loopster's Free trial plan for the reverse email lookup API costs $0.00 per 1,000 people. Loopster's docs list none of the 13 fields on our checklist: Experience, Education, Skills, Headline and 9 more.
You get up to 10,000 calls a month.
We haven't run Loopster through [our reverse email lookup API benchmark](https://datacircle.dev/best-reverse-email-lookup-api.txt) yet.
This plan is free. We rank 463 plans for reverse email lookup APIs by price. Half the plans cost $30.00 per 1,000 people or less. [See how many reverse email lookup API plans are free.](https://datacircle.dev/best-reverse-email-lookup-api.txt)
[Minerva's $400 monthly plan](https://datacircle.dev/reverse-email-lookup-apis/minerva/400-monthly/llms.txt) costs the least per 1,000 people. Minerva's reverse email lookup API costs nothing beyond the plan price.
[Village's $25 pack (Reverse Lookup by Email, cached only)](https://datacircle.dev/reverse-email-lookup-apis/village/25-pack-1000-credits-post-v2-people-enrich-by-email-reverse-lookup-by-email-cached-only/llms.txt) covers any number of people. Village's $25 pack costs less up front than Minerva's $400 monthly plan.
[GetProspect](https://datacircle.dev/reverse-email-lookup-apis/getprospect/399-monthly-growth-50k-post-v2-people-enrich/llms.txt), [Village](https://datacircle.dev/reverse-email-lookup-apis/village/1-monthly/llms.txt) and [treg](https://datacircle.dev/reverse-email-lookup-apis/treg/top-up-from-200/llms.txt) are the best reverse email lookup API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/reverse-email-lookup-apis/loopster/free
- [Reverse email lookup API: the best of 30+ providers compared](https://datacircle.dev/best-reverse-email-lookup-api.txt)
- Get it: https://loopster.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Request: Docs behind sign-up
- API key: with the plan, on https://loopster.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Its API docs: https://docs.loopster.ai/integrations/data-enrichment/loopster-data?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Sold by: Loopster (https://loopster.ai?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 0%

## Price

- $ per 1,000 people: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: 88 other calls

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Free first-party lookups from Loopster's own contact database

## Data

- Freshness: 1 day
- Keep data: no limit
- Use data: Subject to the Terms and any restrictions identified in the Services, we grant you a non-exclusive right to use Results for your internal business purposes. You may not sell, sublicense, or redistribute Results as a standalone product or use them to build a competing database or service. [...] You agree not to do, and not to permit anyone acting through your account to do, any of the following. use the Services in violation of applicable law, including data-protection, privacy, and electronic-marketing laws, resell, sublicense, or redistribute data obtained from Loopster or its data providers as a standalone dataset, or use the Services to build a competing database or product, upload, or use the Services to search for or enrich, special categories of personal data, health information, or data relating to children, use the Services or Results to make decisions producing legal or similarly significant effects concerning a person, including decisions about employment, credit, housing, insurance, education, or access to essential services, without all legally required safeguards and our prior written approval, use the Services to conduct unlawful surveillance, infer sensitive characteristics, identify anonymous individuals, facilitate doxxing or harassment, or discriminate against any person, interfere with, disrupt, or circumvent the Services or any usage limits, or compromise the security of any account, network, or system, including through phishing, malware, or denial-of-service attacks, misrepresent your identity, create fake profiles, or impersonate any person or organisation, use the Services to promote, coordinate, or execute any fraudulent or deceptive scheme, reverse-engineer, decompile, disassemble, or otherwise attempt to derive the source code, underlying algorithms, or data models of the Services, except to the extent expressly permitted by applicable law that cannot be waived by contract, use the Services to send spam or engage in abusive or misleading outreach, breach export-control or sanctions laws, or use the Services for the benefit of any person subject to sanctions, fail to honour, or attempt to circumvent, any opt-out, objection, or suppression request, or any suppression list made available through the Services.

## Plan

- Pay: $0
- Enough for: 10,000 calls a month
- Expires: 14 days

## Rate limit

- Per day: 50,000
- Per second: 4
- Batch: 1,000

## Speed

- Answer: by polling

## The call

- You send: Docs behind sign-up

## About the plan

- Plan: Free trial
- Who can get it: anyone, no credit card needed

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

found, LinkedIn URL, last updated, days since refresh

## Loopster's plans (4)

- [Loopster, free](https://datacircle.dev/reverse-email-lookup-apis/loopster/free/llms.txt): $0.00 per 1,000, 0% complete, 1 day
- [Loopster, $179 monthly](https://datacircle.dev/reverse-email-lookup-apis/loopster/179-monthly/llms.txt): $0.597 per 1,000, 0% complete, 1 day
- [Loopster, $449 monthly](https://datacircle.dev/reverse-email-lookup-apis/loopster/449-monthly/llms.txt): $0.299 per 1,000, 0% complete, 1 day
- [Loopster, $1,299 monthly](https://datacircle.dev/reverse-email-lookup-apis/loopster/1299-monthly/llms.txt): $0.289 per 1,000, 0% complete, 1 day

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

- Docs behind sign-up: [Loopster, free](https://datacircle.dev/reverse-email-lookup-apis/loopster/free/llms.txt)

## Loopster's APIs (7)

- [Loopster: company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/loopster/free/llms.txt)
- [Loopster: company enrichment API pricing, 4 plans](https://datacircle.dev/company-enrichment-apis/loopster/free/llms.txt)
- [Loopster: phone finder API pricing, 4 plans](https://datacircle.dev/find-phone-apis/loopster/free/llms.txt)
- [Loopster: people search API pricing, 4 plans](https://datacircle.dev/people-search-apis/loopster/free/llms.txt)
- [Loopster: people enrichment API pricing, 4 plans](https://datacircle.dev/person-enrichment-apis/loopster/free/llms.txt)
- [Loopster: reverse email lookup API pricing, 4 plans](https://datacircle.dev/reverse-email-lookup-apis/loopster/free/llms.txt)
- [Loopster: email finder API pricing, 4 plans, Find Personal Email](https://datacircle.dev/find-email-apis/loopster/free-trial-find-personal-email/llms.txt)
- [Loopster: email finder API pricing, 4 plans, POST /v1/capabilities/loopster-data-find-work-email/runs](https://datacircle.dev/find-email-apis/loopster/free-trial-post-v1-capabilities-loopster-data-find-work-email-runs/llms.txt)

## Loopster: reverse email lookup API alternatives

- [StableEnrich, pay as you go](https://datacircle.dev/reverse-email-lookup-apis/stableenrich/pay-as-you-go/llms.txt): $0.02 per 1,000, 0% complete, 1 day
- [Mawsool International FZCO on Apify, $10,788 yearly](https://datacircle.dev/reverse-email-lookup-apis/mawsool-international-fzco-on-apify/10788-yearly/llms.txt): $0.54 per 1,000, 62% complete, live
- [Caller Kit, $6,999 monthly](https://datacircle.dev/reverse-email-lookup-apis/caller-kit/6999-monthly/llms.txt): $1.40 per 1,000, 0% complete, 1 day
- [IntelBase, $299.99 yearly](https://datacircle.dev/reverse-email-lookup-apis/intelbase/299-99-yearly/llms.txt): $2.055 per 1,000, 8% complete, live

## 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.

- https://docs.loopster.ai/api-reference/errors.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.loopster.ai/api-reference/rate-limits.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.loopster.ai/api-reference/v1/authentication.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.loopster.ai/api-reference/v1/endpoints/list-capabilities.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.loopster.ai/api-reference/v1/endpoints/run-capability.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.loopster.ai/api-reference/v1/introduction.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.loopster.ai/integrations/data-enrichment/loopster-data?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://loopster.ai/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://loopster.ai/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing