greatapis

Open Source Projects — entry 001 of 8

Countly

Verified Jul 2026

Countly is an open-source product analytics platform you self-host (or run as their managed cloud), ingesting events over a REST Data API keyed by a per-app `app_key` rather than a private secret — a live unauthenticated POST to a running Countly server (try.count.ly/o) confirmed the endpoint only demands `app_key`, returning a `missing_api_key` JSON error otherwise. The Community Edition is free and self-hostable under an AGPLv3-derived license; Countly also sells a paid Enterprise Edition with SSO, extra data sources, and dedicated support.

analyticsopen-sourceself-hostedproduct-analyticsmobile
Visit api.count.ly ↗More Open Source Projects
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSONResponses can be requested as JSON.

GreatAPIs Score

Score71out of 100
Authentication25/25No authentication required
Pricing17/20Freemium tier available
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months

Embed this badge

Scored 71 on greatapis.com
<a href="https://greatapis.com/api/countly/"><img src="https://greatapis.com/badge/countly.svg" alt="Scored 71 on greatapis.com"></a>

Auth quickstart

  1. No key needed — call it now.
Stored keyNo key stored

Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.

People comparing Countly also look at…

All 8 →

Countly vs Shields

Shields supports 3 response formats, while Countly offers fewer — pick Shields for more integration flexibility.

Compare →

Countly vs Creative Commons Catalog

Creative Commons's search catalog was handed off to WordPress.org and relaunched as Openverse; the old `api.creativecommons.engineering` host now 301-redirects to the current `api.openverse.org`. A live unauthenticated GET against `api.openverse.org/v1/images/` returned a 200 JSON result set with `Access-Control-Allow-Origin: *`, confirming keyless anonymous search still works today (rate-limited to 200 requests/day per IP), with an optional `/v1/auth_tokens/register/` OAuth2 client-registration endpoint (confirmed live, returning a 400 validation error rather than 404) for higher limits. The catalog itself and every indexed work are free to use under their respective open licenses.

Compare →

Countly vs Datamuse

Datamuse is a free word-finding query engine for autocomplete, rhyme, and meaning-based lookups; a live unauthenticated GET against `api.datamuse.com/words` returned a 200 JSON array with `Access-Control-Allow-Origin` echoing the request Origin plus `Access-Control-Allow-Credentials: true`, resolving cors "unknown" to "yes". Its own homepage now states that starting January 1, 2027 an API key will be required on every request (capped at 100,000/day per key) after more than a decade of fully free access — as of this check the API still works with no key at all.

Compare →

Countly vs Drupal.org

Drupal.org exposes its community project and node data through a legacy Drupal 7 REST endpoint (`drupal.org/api-d7/node.json`); a live unauthenticated GET returned a 200 JSON body with `Access-Control-Allow-Origin: *`, resolving cors "unknown" to "yes". It's a free community resource run by the nonprofit Drupal Association, with no authentication or paid tier for reading published project data.

Compare →

Countly vs GitHub Contribution Chart Generator

Countly supports CORS, while GitHub Contribution Chart Generator doesn't — pick Countly for direct browser calls.

Compare →

Countly vs GitHub ReadMe Stats

Countly supports CORS, while GitHub ReadMe Stats doesn't — pick Countly for direct browser calls.

Compare →

Metabase

An open source Business Intelligence server to share data and analytics inside your company

API Key · CORS