diff --git a/README.md b/README.md
index 65ad32b9..6e387769 100644
--- a/README.md
+++ b/README.md
@@ -448,8 +448,7 @@ Table of Contents
   * [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.
   * [DJ Checkup](https://djcheckup.com) — Scan your Django site for security flaws with this free, automated, checkup tool. Forked from the Pony Checkup site.
   * [Doppler](https://doppler.com/) — Universal Secrets Manager for application secrets and config, with support for syncing to various cloud providers. Free for unlimited users with basic access controls.
-  * [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.
+  * [duo.com](https://duo.com/) — Two-factor authentication (2FA) for website or app. Free for 10 users, all authentication methods, unlimited, integrations, hardware tokens.
   * [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.
@@ -703,7 +702,7 @@ Table of Contents
 
   * [Arvan Cloud](https://arvancloud.com/) — Offers cloud related services (CDN,Cloud DNS, PaaS, Security etc.). Free plan offers :
     - CDN with Free SSL. 50 GB Traffic + 1 Million HTTP(S) Requests.
-    - Free Cloud DNS for unlimited sites.
+    - Free Cloud DNS for unlimited domains.
     - Free Cloud Security with Basic DDoS Protection + 5 Firewall Rules.
     - Free VoD (Video On Demand) Platform with 10 GB Storage + 50 GB Traffic.
   * [bootstrapcdn.com](https://www.bootstrapcdn.com/) — CDN for bootstrap, bootswatch and fontawesome.io
@@ -741,7 +740,6 @@ Table of Contents
   * [Deta](https://www.deta.sh) – Deploy unlimited number of Node.js and Python apps for free up to 50k requests/month. Includes free DBs, Auth and email.
   * [dronahq.com](https://www.dronahq.com/) — No code application development platform for enterprises to visually develop application, integrate with existing systems to Build internal apps, processes and forms, rapidly. Free plan offers 200 Tasks/month, Unlimited Draft Apps and 1 Published Apps
   * [encore.dev](https://encore.dev/) — Backend framework using static analysis to provide automatic infrastructure, boilerplate free code, and more. Includes free cloud hosting for hobby projects.
-  * [firebase.google.com](https://firebase.google.com) — Build real-time apps, the free plan has 100 max connections, 10 GB data transfer, 1 GB data storage, 1 GB hosting storage and 10 GB hosting transfer
   * [gearhost.com](https://www.gearhost.com/pricing) — Platform for .NET and PHP apps. 256 MB of RAM for free on a shared server with limited resources
   * [gigalixir.com](https://gigalixir.com/) - Gigalixir provide 1 free instance that never sleeps, and free-tier PostgreSQL database limited to 2 connections, 10, 000 rows and no backups, for Elixir/Phoenix apps.
   * [glitch.com](https://glitch.com/) — Free public/private hosting with features such as code sharing and real-time collaboration. Free plan has 1000 hours/month limit.
@@ -773,6 +771,7 @@ Table of Contents
   * [blockspring.com](https://www.blockspring.com/) — Cloud functions. Free for 5 million runs/month
   * [BMC Developer Program](https://developers.bmc.com/site/global/bmc_helix_platform/program/overview/index.gsp) — The BMC Developer Program provides documentation and resources to build and deploy digital innovations for your enterprise. Access to a comprehensive, personal sandbox which includes the platform, SDK, and a library of components that can be used to build and tailor apps.
   * [darklang.com](https://darklang.com/) - Hosted language combined with editor and infrastructure. Free during the beta, generous free tier planned after beta.
+  * [Firebase](https://firebase.com) — Firebase helps you build and run successful apps. Free Spark Plan offers Authentication, Hosting, Firebase ML , Realtime Database,Cloud Storage,Testlab. A/B Testing, Analytics, App Distribution, App Indexing, Cloud Messaging (FCM), Crashlytics, Dynamic Links, In-App Messaging, Performance Monitoring, Predictions, and Remote Config are always-free.
   * [getstream.io](https://getstream.io/) — Build scalable news feeds and activity streams in a few hours instead of weeks, free for 3 million feed updates/month
   * [hasura.io](https://hasura.io/) — Platform to build and deploy app backends fast, free for single node cluster.
   * [iron.io](https://www.iron.io/) — Async task processing (like AWS Lambda) with free tier and 1-month free trial
@@ -792,7 +791,8 @@ Table of Contents
   * [ServiceNow Developer Program](https://developer.servicenow.com/) — Rapidly build, test, and deploy applications that make work better for your organization. Free Instance & access early previews.
   * [simperium.com](https://simperium.com/) — Move data everywhere instantly and automatically, multi-platform, unlimited sending and storage of structured data, max. 2,500 users/month
   * [stackstorm.com](https://stackstorm.com/) — Event-driven automation for apps, services and workflows, free without flow, access control, LDAP,...
-  * [streamdata.io](https://streamdata.io/) — Turns any REST API into an event-driven streaming API. Free plan up to 1 million messages and 10 concurrent connections
+  * [streamdata.io](https://streamdata.io/) — Turns any REST API into an event-driven streaming API. Free plan up to 1 million messages and 10 concurrent connections.
+  * [Supabase](https://supabase.io) — The Open Source Firebase Alternative to build backends. Free Plan offers Authentication, Realtime Database & Object Storage.
   * [tyk.io](https://tyk.io/) — API management with authentication, quotas, monitoring and analytics. Free cloud offering
   * [zapier.com](https://zapier.com/) — Connect the apps you use, to automate tasks. 5 zaps, every 15 minutes and 100 tasks/month
   * [LeanCloud](https://leancloud.app/) — Mobile backend. 1GB of data storage, 256MB instance, 3K API requests/day, 10K pushes/day are free. (API is very similar to Parse Platform)
@@ -907,6 +907,7 @@ Table of Contents
    * [acunote.com](https://www.acunote.com/) — Free project management and SCRUM software for up to 5 team members
    * [AppFlux](https://appflux.io) — Project Management tool with Log Management & Issues. Take your team onboard & forget management through emails.
    * [asana.com](https://asana.com/) — Free for private project with collaborators
+   * [Backlog](https://backlog.com) — Everything your team needs to release great projects in one platform. Free plan offers 1 Project with 10 users & 100MB storage.
    * [Basecamp](https://basecamp.com/personal) - To-do lists, milestone management, forum-like messaging, file sharing, and time tracking. Up to 3 projects, 20 users, and 1GB of storage space.
    * [bitrix24.com](https://www.bitrix24.com/) — Free intranet and project management tool
    * [cacoo.com](https://cacoo.com/) — Online diagrams in real-time: flowchart, UML, network. Free max. 15 users/diagram, 25 sheets
@@ -957,6 +958,7 @@ Table of Contents
    * [ubertesters.com](https://ubertesters.com/) — Test platform, integration and crowdtesters, 2 projects, 5 members
    * [vabotu](https://vabotu.com/) - A collaborative tool for project management. Free and other plans are avaiable. The Freelance plan is for 10 users, include messaging, task-boards, 5GB online storage, workspaces, export data.
    * [vivifyscrum.com](https://www.vivifyscrum.com/) — Free tool for Agile project management. Scrum Compatible
+   * [Wikifactory](https://wikifactory.com/) — Product designing Service with Projects,VCS & Issues. Free plan offers unlimited projects & collaborators and 3GB storage.
    * [Yodiz](https://www.yodiz.com/) — Agile development and issue tracking. Free up to 3 users, unlimited projects.
    * [YouTrack](https://www.jetbrains.com/youtrack/buy/#edition=incloud) — Free hosted YouTrack (InCloud) for FOSS projects, private projects (free for 3 users). Includes time tracking and agile boards
    * [zenhub.com](https://www.zenhub.com) — The only project management solution inside GitHub. Free for public repos, OSS and nonprofit organizations
@@ -1114,6 +1116,7 @@ Table of Contents
    * [Avo](https://avo.app/) — Simplified analytics release workflow. Single-source-of-truth tracking plan, type safe analytics tracking library, in-app debuggers, data observability to catch all data issues before you release. Free for 2 workspace members and 1 hour data observability lookback.
    * [Branch](https://branch.io) — Mobile Analytics Platform. Free Tier offers upto 10K Mobile App Users with deep-linking & other services.
    * [Clicky](https://clicky.com) — Website Analytics Platform. Free Plan for 1 website with 3000 views analytics.
+   * [Databox](https://databox.com) — Business Insights & Analytics by combining other analytics & BI platforms. Free Plan offers 3 users, dashboards & data sources. 11M historical data records.
    * [indicative.com](https://indicative.com/) — Customer analytics platform to optimize customer engagement, increase conversion, and improve retention. Free up to 50M events/month.
    * [Panelbear.com](https://panelbear.com/) — Blazingly fast and private, free tier includes 5,000 pageviews per month for unlimited websites
    * [Hitsteps.com](https://hitsteps.com/) — 2,000 pageviews per month for 1 website