7 Open-source SaaS Tech Stack for startups

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These repositories are like pre-built code that you can set up on a VM or a Docker Container and use in your product, saving time and effort in coding from scratch.

But before we continue, I have compiled a step-by-step “SaaS Launch List Guide — 2025” guide that will provide you with all the necessary steps for getting ideas, validation, marketing, and listing on multiple directories to get more outreach.

SaaS Launch List Guide - 2025 Launch Your SaaS Like a Pro: A Step-by-Step Guide for SuccessWith my experience of 6+ years, I have created a Notion… shivanshudev.gumroad.com

QloApps: Hotel Management and Reservation System This is a free and open-source tool that can help you or your clients manage hotels and reservations. With slight modifications, you can even customize it to meet other requirements. GitHub: https://github.com/Qloapps/QloApps

Opencart: Full e-commerce solution in PHP If you want to develop an e-commerce solution from the Admin panel, client side, and also manage the supply chain process. Then this repository can save you time and effort in coding. GitHub: https://github.com/opencart/opencart

Chaskiq: Open-source messaging platform for marketers If you have a requirement where you want to develop features like Live Chat, Customer Support, emails, CRMs, everything possible using the platform like Intercom or Crisp, you can check Chaskiq. GitHub: https://github.com/chaskiq/chaskiq

DALLE2-pytorch: OpenAI Text to Image Generation If you want to have a feature where you want to generate images using AI/ML, but the APIs are costing way too much for this on a large scale, then try checking out this OpenAI solution for image generation. GitHub: https://github.com/lucidrains/DALLE2-pytorch

Evidently: Monitor your AI/ML Models easily to find and fix bugs If you have your ML Models that you’ve deployed and want to monitor the usage and performance of, then I would say you should check this open-source repository for it. GitHub: https://github.com/evidentlyai/evidently

Killbill: Manage billing and subscriptions A free and open-source tool to manage the subscriptions and billing cycles of your users. GitHub: https://github.com/killbill/killbill

Keila: A free way to implement Newsletters for your SaaS If you want to have a newsletter published and are looking for alternatives to Mailchimp or Sendinblue, then you should be checking out Keila. GitHub: https://github.com/pentacent/keila/

These were some free and open-source repositories that can save your time, money, and efforts in your business. Feel free to let me know in comments if you like to share anything else similar. Lastly, I want to share a SaaS, EnjoyTheAPI.com, that I’ve made, which helps me in developing and saving time. It’s a hub for premium APIs and services ready to plug into your SaaS, and it’s based on a credit-based approach rather than monthly subscriptions.

EnjoyTheAPI - Powerful APIs for Developers Reliable, scalable APIs for developers. OTP services, email verification, translation, and more with just a few lines… www.enjoytheapi.com

Read the full article here: https://medium.com/@shivanshudev/7-open-source-saas-tech-stack-for-startups-e483e71fc133