Check the gender of a name

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Integrate with high-volume API

Integrate gender checking directly into your workflows and perform efficient classification on big datasets with our simple APIs built for high volumes. Get started quickly with community libraries for any programming language.

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Gender classification API request using Genderize

Full name parsing

Our name parsing algorithm allows you to pass full names to our API's.

Diacritics and accents

We support diacritics from any language as well as non-latin alphabets.

Localization

Our dataset covers the whole planet and we support scoping your requests to specific countries.

Gender, age and nationality inference in CSV file

Upload and process CSV files

Looking to enrich your data with demographic insights? Our CSV tool allows you to upload your data and check gender, age and nationality predicted in minutes.

Using CSV processing is a quick way to gain insights into your users, audience, prospects and customers by analysing their demographic composition.

Upload CSV

Gender checking in no-code workflows

Automate and enrich your data across platforms like Google Sheets, Airtable, Shopify, and Salesforce.

With our official no-code integrations you can add gender checking to any application. Automate and enrich data insights by integrating gender analysis into virtually any platform.

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See also:

Make logo

Make allows you to visually create, build and automate workflows with a user friendly no-code integration tool.

See app
Zapier logo

Zapier automates your workflows across +7000 apps through a no-code UI.

See app
Zapier logo

Pipedream let's you connect services in your stack with code-level control when you need it and no code when you don't.

See app
Databar.ai logo

Databar is a no-code API connector that let's you aggregate, enrich and visualize data from thousands of built-in API connections.

See app

Meet the whole suite

With our collection of services we offer prediction of gender, age and nationality from a name.

genderize.io

Classify gender from names

agify.io

Estimate age from names

nationalize.io

Predict nationality from names

For more than 12 years we've been collecting and processing data. Today we base our results on more than 1 billion people and have processed billions of requests.

Read about our data

Empowering insights across industries

Gender checking has applications across many different fields and industries. The ability to enhance existing datasets with demographic data can unlock new possibilities in both commercial and academic projects.

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Customer analytics

Run gender classification on your customers, audience, or user datasets and gain insights into your market. Enhancing your customer profiles with demographic information can improve product development, content strategies, marketing, and promotional activities.

Academic research

Understand the gender distribution in big corpora to analyze diversity and potential biases. Gender checking of authors, characters, or public figures mentioned in texts can help quantify and analyze biases and disparities in media and literature.

Audience insights

Analyse the audience of your brand, channel or media. Understand the demographic makeup of your consumers to unlock insights and improve content development strategies.

Ship fast with our healthy community of third-party SDKs

Users of our services have open sourced amazing libraries for our API's, making it easy to integrate our name checking technology into any stack. You'll find libraries for nearly every programming language.

  • Ruby
  • Python
  • Go
  • Javascript
  • PHP
  • Java
  • C#
  • R
  • Scala
Browse 23 libraries

Ready to get started?

Create an account in minutes to claim your API key and have unrestricted access.

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Daily free usage

The API and CSV tool is free for up to 100 names/day. No sign up or API key needed, so go ahead and try it out.

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Transparent pricing

We offer multiple tiers of usage. Cancellation at any time and no retention period.

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Explore how Gender Checking is used by thousands of users

We handpicked some of the most interesting cases to spark ideas and learn about our tools.

All case studies

Frequently asked questions

  • How can you tell if a name is male or female?

    Most names are predominantly used by one gender, so a statistical approach will often yield good results. Genderize checks a dataset of ~1 billion people and returns the probability that a name is male or female. Names that are used across both genders — like "Kim" or "Alex" — will return a probability closer to 50%, reflecting the genuine ambiguity. Scoping to a specific country will often improve accuracy, since naming conventions vary across cultures.

  • How accurate is gender prediction?

    Gender prediction is based on statistical probability. If a name returns a probability of 0.92 for female, it means 92% of the people with that name in our dataset are female. On an unbiased sample, the prediction will be correct at that same rate. When tested against the 2024 Olympic Athletes dataset (11,074 athletes), Genderize achieved 94.35% accuracy using first name with country scoping. Accuracy improves further when you scope predictions to a specific country, since names like "Andrea" or "Kim" behave differently across cultures.

  • How does Genderize handle unisex or gender-neutral names?

    Names like "Alex," "Jordan," or "Robin" are used by both genders. For these names, the probability score will be closer to 0.5, reflecting the genuine split in our dataset. This is useful information in itself — a probability of 0.52 tells you the name is essentially gender-neutral, which is a valid finding for many use cases.

  • How does the tool handle names from different cultural or ethnic backgrounds?

    Naming conventions can be different across countries and cultures. Our APIs support scoping a prediction to a specific country using the country_id parameter (ISO 3166-1 alpha-2 code), which will in many cases make the prediction significantly more accurate. For example, "Kim" is predominantly male in Denmark but predominantly female in the United States.

  • Do you offer any free plans?

    Yes — and you won't even have to sign up. You can process 100 names/day with our API or CSV tool and we'll limit you based on your IP. The free tier gives you access to all three APIs: Genderize, Agify, and Nationalize.

  • Can the tool be integrated with CRM systems?

    Yes. You can enrich CRM data with gender, age, and nationality predictions through our official no-code apps for Zapier, Make, and Pipedream . These integrations let you automatically process new contacts as they're added. For more custom setups, the API is straightforward to call from any CRM with webhook or API support.

  • What kind of customer support do you offer?

    You can reach us at info@genderize.io for any questions. We're happy to help you get the most out of our APIs, whether you need guidance on integration, data coverage, or choosing the right plan.

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