# Osint, free: Reverse email lookup API

> To do a reverse email lookup, enter the email address: if its owner set up a Gravatar, you see the avatar shown across thousands of sites plus any name, location, job title and verified social accounts they added - free, and the owner isn’t notified.

Osint's Free account plan for the reverse email lookup API costs $0.00 per 1,000 people. We check each provider's docs for 13 fields. Osint's docs list 4: Experience, About, Location, Photo.
We haven't run Osint through [our reverse email lookup API benchmark](https://datacircle.dev/best-reverse-email-lookup-api.txt) yet.
This plan is free. We rank 472 plans for reverse email lookup APIs by price. Half the plans cost $30.333 or less per 1,000 people. [See the best free reverse email lookup API plan.](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. [StableEnrich's pay-as-you-go plan](https://datacircle.dev/reverse-email-lookup-apis/stableenrich/pay-as-you-go/llms.txt) costs the least for 10,000 people a month: $0.20.
[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 [Findymail](https://datacircle.dev/reverse-email-lookup-apis/findymail/399-monthly-business-plus-post-api-search-reverse-email-reverse-email-lookup-full/llms.txt) are the best reverse email lookup API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/reverse-email-lookup-apis/osint/free
- [Reverse email lookup API: the best of 30+ providers compared](https://datacircle.dev/best-reverse-email-lookup-api.txt)
- Get it: https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Request: `GET https://osint.foundation/api/v1/gravatar/{email}`
- API key: with the plan, on https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Its API docs: https://osint.foundation/gravatar-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Sold by: Osint (https://osint.foundation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 31%
- Experience: ✓
- About: ✓
- Location: ✓
- Photo: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: To do a reverse email lookup, enter the email address: if its owner set up a Gravatar, you see the avatar shown across thousands of sites plus any name, location, job title and verified social accounts they added - free, and the owner isn’t notified.

## Data

- Keep data: no limit
- Use data: Use the service only for lawful purposes, such as security research, fraud prevention, due diligence, journalism, investigations and checking your own exposure [...] You must not use the service, or anything it returns, to: stalk, harass, threaten, dox or intimidate anyone, [...] make decisions about a person’s employment, housing, credit or insurance, or discriminate against anyone, commit or facilitate fraud, identity theft or any other crime, resell or republish raw results as a competing dataset or service without our written permission, get around rate limits, credit metering or account restrictions, scrape the website instead of using the API, or repeatedly send input the service cannot process, attack, probe or overload the service or its infrastructure.

## Plan

- Pay: $0
- You get: 3 credits a day
- Enough for: 3 calls a day

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: GET
- Path: /v1/gravatar/{email}

## About the plan

- Plan: Free account
- Who can get it: anyone aged 18 or over who can enter a binding contract, with an email-verified account

## The 12 fields the plan's answer can hold

has profile, avatar, display name, location, pronouns, job title, employer, bio, username, linked accounts, linked account handles, published emails

## Osint's plans (7)

- [Osint, free](https://datacircle.dev/reverse-email-lookup-apis/osint/free/llms.txt): $0.00 per 1,000, 31% complete
- [Osint, $4.20 pack](https://datacircle.dev/reverse-email-lookup-apis/osint/4-20-pack/llms.txt): $84.00 per 1,000, 31% complete
- [Osint, $29.99 pack](https://datacircle.dev/reverse-email-lookup-apis/osint/29-99-pack/llms.txt): $29.99 per 1,000, 31% complete
- [Osint, $99.99 pack](https://datacircle.dev/reverse-email-lookup-apis/osint/99-99-pack/llms.txt): $9.999 per 1,000, 31% complete
- [Osint, $699 pack](https://datacircle.dev/reverse-email-lookup-apis/osint/699-pack/llms.txt): $1.398 per 1,000, 31% complete
- [Osint, $1,999 pack](https://datacircle.dev/reverse-email-lookup-apis/osint/1999-pack/llms.txt): $0.20 per 1,000, 31% complete
- [Osint, contact us](https://datacircle.dev/reverse-email-lookup-apis/osint/contact-us/llms.txt): 31% complete

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

- `GET /v1/gravatar/{email}`: [Osint, free](https://datacircle.dev/reverse-email-lookup-apis/osint/free/llms.txt)

## Osint's APIs (13)

- [Osint: Facebook page API pricing, 7 plans](https://datacircle.dev/facebook-page-apis/osint/free/llms.txt)
- [Osint: GitHub profile API pricing, 7 plans](https://datacircle.dev/github-profile-apis/osint/free/llms.txt)
- [Osint: Instagram profile API pricing, 7 plans](https://datacircle.dev/instagram-profile-apis/osint/free/llms.txt)
- [Osint: business verification API pricing, 7 plans](https://datacircle.dev/business-verification-apis/osint/free/llms.txt)
- [Osint: domain WHOIS API pricing, 7 plans](https://datacircle.dev/domain-whois-apis/osint/free/llms.txt)
- [Osint: IP company lookup API pricing, 7 plans](https://datacircle.dev/ip-company-lookup-apis/osint/free/llms.txt)
- [Osint: local business search API pricing, 7 plans](https://datacircle.dev/local-business-search-apis/osint/free/llms.txt)
- [Osint: phone validation API pricing, 7 plans](https://datacircle.dev/validate-phone-apis/osint/free/llms.txt)
- [Osint: reverse email lookup API pricing, 7 plans](https://datacircle.dev/reverse-email-lookup-apis/osint/free/llms.txt)
- [Osint: web scraping API pricing, 7 plans](https://datacircle.dev/web-scraping-apis/osint/free/llms.txt)
- [Osint: Snapchat profile API pricing, 7 plans](https://datacircle.dev/snapchat-profile-apis/osint/free/llms.txt)
- [Osint: Telegram channel API pricing, 7 plans](https://datacircle.dev/telegram-channel-apis/osint/free/llms.txt)
- [Osint: TikTok profile API pricing, 7 plans](https://datacircle.dev/tiktok-profile-apis/osint/free/llms.txt)

## Osint: reverse email lookup API alternatives

- [Ihsan Ullah Khan, $49 monthly](https://datacircle.dev/reverse-email-lookup-apis/ihsan-ullah-khan/49-monthly/llms.txt): $0.122 per 1,000, 38% complete, stored
- [LeadFuze, $1,500 monthly](https://datacircle.dev/reverse-email-lookup-apis/leadfuze/1500-monthly/llms.txt): $0.15 per 1,000, 15% complete, 1 month
- [MoltSets, $997 monthly, Max, POST /reverse_email_lookup](https://datacircle.dev/reverse-email-lookup-apis/moltsets/997-monthly-max-post-reverse-email-lookup/llms.txt): $0.207 per 1,000, 15% complete, 14 days
- [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

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-08.

- https://osint.foundation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://osint.foundation/gravatar-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://osint.foundation/openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://osint.foundation/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing