AI · alternatives · 2026
24 alternatives to Kill SaaS with Open Source
KillSaaS is my answer to subscription software in the AI era. I'm building this because I believe small teams can use modern AI tools to create free alternatives to giants like Figma and DocuSign in weeks, not years. We're creating a platform where developers vote on which SaaS to replace, then build it together as open source. wdyt?
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
200+ open source alternatives to popular B2B tools
2021 · btw.so · its alternatives →
- 2
Discover open source alternatives to your proprietary SaaS
2022 · opensourcealternative.to · its alternatives →
- 3
Outlit▲368Hey HN, I'm Leo, a cofounder at Outlit. After a year of coding, we have finally launched Outlit. Outlit was born post ChatGPT when we realized that AI can help empower everyday people to take on contract work and not have to rely on expensive lawyers all the time. Right now we are mainly focused on SaaS Agreements but have playbooks for other agreements (Partnership, Services, NDA). We also have a cool knowledge base feature that lets you semantically search across all your contracts. Would love some honest feedback. Thanks HN.
2024 · outlit.ai · its alternatives →
- 4
Free replacements for Slack, Notion, Figma & 60+ paid tools
May 2026 · osalfinder.com · its alternatives →
- 5
- 6OS
I got tired of collecting open source projects in my chrome bookmarks so I decided to compile a curated list of: - Recently active projects on GitHub - Mostly dev tools (but also productivity, analytics) - Projects which are "Alternative to X software" My bookmarks are finally empty:D If you have a great open source tool you use, I'd be glad to hear your suggestions. Also, any feedback is greatly appreciated.
2025 · alternativeoss.com · its alternatives →
- 7IV
For the last several years I've been creating a ERP platform, Stockor. While I'm going to continue offering it as a SaaS, I've decided to also open-source it. I'm hopeful that by doing so it will: 1) Grow it into a Wordpress size juggernaut with a plugin for any business process under the sun. 2) Bring me interesting consulting gigs. The open-source site is at stockor.org. There's a demo up at stockor.com/demo as well. Looking forward to hearing HN's thoughts!
2014 · its alternatives →
- 8
Hi HN! We at Moment[1] are working on Notion alternative which is (1) rich and collaborative, but (2) also just plain-old Markdown files, stored in git (ok, technically in jj), on local disk. We think the era of rigid SaaS UI is, basically, over: coding agents (`claude`, `amp`, `copilot`, `opencode`, etc.) are good enough now that they instantly build custom UI that fits your needs exactly. The very best agents in the world are coding agents, and we want to allow people to simply use them, e.g., to build little internal tools—but without compromising on collaboration. Moment aims to cover…
Mar 2026 · moment.dev · its alternatives →
- 9
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Tl;DR Save 60% of development effort building your SaaS and enterprise apps using our open-source platform, demo: https://www.youtube.com/watch?v=gob4j072Isg Hi friends, It's a bit surreal writing a Show HN post, being a HN member since 2012, but I'm still excited to be here. We are Arek and Michal (hn: mgl), and we have published Openkoda - an open-source low-code platform for the rapid development of SaaS and enterprise applications. OUR STORY We met at the university and spent the next 10 years building high-performance applications for finance, eCommerce and travel…
2024 · github.com · its alternatives →
- 11
Find alternatives to famous products
2024 · microlaunch.net · its alternatives →
- 12
Hey HN, When I was learning to code I was always intrigued to see the guys on twitter making money with a SaaS. I always wondered how to make them and after a few months I developed my own. I wanted to share a Boilerplate for any new devs who are wondering how to start their own SaaS or wonder how things work. Boilerplate comes with Auth, Payments, UI and all the good stuff. Ali
2024 · github.com · its alternatives →
- 13
We've recently made our product, ozma.io, open-source. It's a CRM/ERP platform for building enterprise systems. We believe that AI will soon handle implementing most of the boilerplate and UIs in the specialized business software. Just look at what lovable.dev does today! Soon products which make creating business software easier for developers will become obsolete, or transform into "libraries" to be used by AIs. We are losing this race, so we go the second route — publish everything and go on building other products on top of it. GitHub repo URL:…
2025 · github.com · its alternatives →
- 14
AI teardowns of real SaaS — find the wedge, not the clone
Jun 2026 · ideatehub.net · its alternatives →
- 15SA
Hi HN, I built SubTrack to help teams find unused SaaS tools and cloud resources before they silently eat into budgets. The motivation came from seeing how hard it is to answer simple questions: – Which SaaS tools are actually used? – Which cloud resources are idle? – What will our end-of-month spend look like? SubTrack connects to tools like AWS, GitHub, Vercel, and others to surface unused resources and cost signals from one place. Recently I added multi-account support, currency localization, and optional AI-based insights to help interpret usage patterns. This is an early-stage project…
Jan 2026 · subtrack.pulseguard.in · its alternatives →
- 16WB
Hey HN: Kaveh here, founder of https://www.usage.ai/ We help companies drive down AWS, GCP, and Azure spend. Why? Because the way it's done now is a pain. DevOps and Software Engineers end up spending time managing costs rather than focusing on business problems. I have been building Usage AI for almost 4 years now (4 year anniversary in 1 month from now!) with an incredible group of founding people. We started as a product just to help lower AWS EC2 costs, and now we do all major AWS services (such as RDS, OpenSearch, ElastiCache, and Redshift with more on the way) and other…
2024 · its alternatives →
- 17
It's called learnfrom.co, a platform for creating, hosting and selling online courses. I started building it because I wanted to solve a problem I had with existing course platforms. I kept running into things I wanted to change, so I started building them myself. The problem: I wasn't really a software engineer. Instead, I started using AI to build the product. I'd describe what I wanted, let it write the code, test it, fix things when they broke, and repeat. That somehow turned into a real product. LearnFrom is now used by 100+ creators and businesses, with real students and real payments…
Aug 2026 · learnfrom.co · its alternatives →
- 18
AI-powered SaaS tools built for growth hackers
Jul 2026 · dealforgelabs.com · its alternatives →
- 19SC
I setup this up about two months ago and seeded it with a variety of questions about stuff SaaS related but it ultimately ran out of steam. I truly think there's a need for real honest to goodness web forum for SaaS enthusiasts as forums often turn into a gold mine of quality content as the user base grows and matures. So this is my attempt to get this thing some exposure and get some users for it. It's not meant as a replacement for Hacker News at all, as HN is a perfect platform for trends and current news. But I think it's lacking when it comes to fostering long term topic discussion…
2011 · saasaholics.com · its alternatives →
- 20
Hey HN, I kept seeing the same question asked over and over in startup communities: "What tech stack should I use for my SaaS?" The answers were always scattered, opinionated, and never accounted for budget or team size. So I built appstackbuilder.com — you tell it your monthly budget, app type, team size, and skill level, and it recommends a full stack (auth, database, hosting, payments, analytics, etc.) with actual pricing for each tool. A few things that make it different from generic advice: - It accounts for team size when calculating costs (e.g. Clerk charges per user, Linear charges…
Feb 2026 · appstackbuilder.com · its alternatives →
- 21SN
Hey HN I’m Daniel, a fullstack developer from Sydney Australia and founder at Saas Ninja (https://saasninja.io/). Saas Ninja provides a suite of simple tools/APIs on a monthly subscription basis that help Product Teams sell, monitor and develop their Saas Products. The idea for Saas Ninja came during my last employment contract working for a startup. We needed a number of monitoring tools for our product and each provider I researched was often over-complicated for what we wanted and was priced more towards a monitoring connoisseur than a startup developer. With looming…
2018 · its alternatives →
- 22
Stop building products nobody wants, find problems smarter.
2025 · problempilot.com · its alternatives →
- 23
Hey HN. I built an AI agent harness over the past few months and I'm open sourcing it today. Some context on why. I've been building with Claude Code daily using this harness. It orchestrates multiple AI agents as a team, with a dashboard, chat, kanban board, the works. I used it to build a full SaaS product (MyUpMonitor, https://myupmonitor.com) in about 24 hours of focused coding. Then yesterday Anthropic announced Mythos and decided to keep it behind closed doors. Meanwhile I'm paying for Claude and I can't access their best model. I don't think that is nice at all... So I'm…
Apr 2026 · github.com · its alternatives →
- 24
Custom AI solutions you own forever. No SaaS.
Mar 2026 · contriboot.dev · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →