diff --git a/README.md b/README.md
index 66de479d..5e7177e8 100644
--- a/README.md
+++ b/README.md
@@ -193,7 +193,7 @@ Table of Contents
   * [ROBOHASH](https://robohash.org/) - Web service to generate unique (cool :) images from any text.
   * [Scraper API](https://www.scraperapi.com/) — Cloud based web scraping API handles proxies, browsers, and CAPTCHAs. Scrape any web page with a simple API call. Get started with 1000 free API calls/month.  
   * [ScrapingAnt](https://scrapingant.com/) — Headless Chrome scraping API and free checked proxies service. Javascript rendering, premium rotating proxies, CAPTCHAs avoiding. Free plans available.
-  * [ScrapingDog](https://scrapingdog.com/) — Scrapingdog handles millions of proxies, browsers and CAPTCHAs to provide you with HTML of any web page in a single API call. It also provides Web Scraper for Chrome & Firefox and a software for instant scraping demand.
+  * [ScrapingDog](https://scrapingdog.com/) — Scrapingdog handles millions of proxies, browsers and CAPTCHAs to provide you with HTML of any web page in a single API call. It also provides Web Scraper for Chrome & Firefox and a software for instant scraping demand. Free plans available.
   * [scrapinghub.com](https://scrapinghub.com) — Data scraping with visual interface and plugins. Free plan includes unlimited scraping on a shared server
   * [ScrapingNinja](https://www.scrapingninja.co/) — Handle JS rendering, Chrome Headless, Proxy rotation and CAPTCHAs solving all in one place. The first 1000 are free of charge, no credit card required.
   * [shrtcode API](https://shrtco.de/docs) - Free URL Shortening API without authorisation and no request limits
@@ -361,6 +361,7 @@ Table of Contents
   * [crypteron.com](https://www.crypteron.com/) — Cloud-first, developer-friendly security platform prevents data breaches in .NET and Java applications
   * [Dependabot](https://dependabot.com/) Automated dependency updates for Ruby, JavaScript, Python, PHP, Elixir, Rust, Java (Maven and Gradle), .NET, Go, Elm, Docker, Terraform, Git Submodules and GitHub Actions.
   * [duo.com](https://duo.com/) — Two-factor authentication (2FA) for website or app. Free for 10 users, all authentication methods, unlimited, integrations, hardware tokens
+  * [Firebase Auth](https://firebase.google.com/products/auth/) — Free end-to-end identity solution, email and password accounts, Google, Twitter, Facebook, GitHub login, phone auth (up to 10k/month), and more.
   * [foxpass.com](https://www.foxpass.com/) — Hosted LDAP and RADIUS. Easy per-user logins to servers, VPNs and wireless networks. Free for 10 users
   * [globalsign.com](https://www.globalsign.com/en/ssl/ssl-open-source/) — Free SSL certificates for Open Source
   * [Have I been pwned?](https://haveibeenpwned.com) — REST API for fetching the information on the breaches.