Why Open Source for Startups?

In the fast-paced world of startups, every dollar counts. With rising SaaS costs and tightening budgets, smart founders are turning to powerful open-source alternatives that deliver enterprise-grade functionality without the enterprise-level price tags.

• Cost efficiency – Eliminate recurring subscription fees for essential business software
• Data sovereignty – Maintain full control over sensitive business and customer data
• Integration flexibility – Connect with other systems more easily through open APIs
• Future-proofing – Avoid vendor lock-in and maintain access to your tools regardless of vendor status

In this article, we are going to see 11 cutting-edge open source software or tools which allow startups to complete thier jobs to be done across various business functions.

The Tools

Project Management

1. Plane

Website ↗️ |  GitHub ↗️ | ⭐️ 35.7k

Alternative to: Linear, Jira, Asana ($8-13 / user / mo)

Plane is an open-source alternative to popular project management tools like JIRA, Linear, Monday, and Asana. It offers a simplified way to track your issues, epics, and product roadmaps, making it an excellent choice for teams looking for a streamlined project management solution.

• Kanban, list, and calendar views
• Sprint planning and road-maps
• Custom fields and workflow automation
• Time tracking and estimation
• Unlimited projects and team members

Monthly savings compared to the alternatives for a  team of 10 is $105/month or $1,260/year.

Try plane for free now with Osuite: Plane

2. Huly

Website ↗️ |  GitHub ↗️ | ⭐️ 20.6k

Alternative to: Linear, Jira, Notion, Slack (≈$25 / user / mo)

An open-source platform that combines project management, team communication, document collaboration, and virtual office spaces in one integrated solution

• Two-way GitHub sync
• Team calendar & planning
• Rich-text docs and knowledge base
• Integrated chat, inbox, and virtual office

Monthly savings compared to the alternatives for a  team of 10 is $250/month or $3,000/year

Request access to Huly on Osuite and save $3000 a year: Huly

CRM & Customer Management

3. Twenty CRM

Website ↗️ |  GitHub ↗️ | ⭐️ 27.5k

Alternative to: Salesforce, HubSpot Sales Hub ($23-165 / user / mo)

Twenty is a cutting-edge, open-source CRM platform designed to revolutionize how businesses manage customer relationships. Built with modern technologies and a user-centric approach, Twenty empowers teams to streamline their workflows and make data-driven decisions.

• Contact & deal pipelines
• Custom objects & fields
• Email integration, API-first

Monthly savings: 5 reps save $470/month or $5,640/year

You can request Twenty CRM today at Osuite

Database Solutions

3. NocoDB

Website ↗️ |  GitHub ↗️ | ⭐️ 53.2k

Alternative: Airtable, Monday.com ($12-20 / user / mo)

NocoDB is an open-source platform that allows users to create and manage databases with the ease of using spreadsheets. Whether you bring your own database or use one provided by NocoDB, it offers a seamless and intuitive experience for managing millions of rows of data without any need for coding knowledge. It's designed to give you complete control over your data while offering unparalleled scalability and value.

• Spreadsheet interface on SQL back-end
• Multiple views (grid, gallery, kanban)
• Forms, automations, webhooks, RBAC

Monthly savings compared to the alternatives for a  team of 15 users is $240/month or $2,880/year.

Start using NocoDB today for free with osuite: NocoDB

Knowledge Base & Documentation

5. AppFlowy

Website ↗️ |  GitHub ↗️ | ⭐️ 61.6k

Alternative to: Notion ($10 / user / mo)

AppFlowy is an open-source AI collaborative workspace designed to bring projects, wikis, and teams together seamlessly.

• Docs, databases, kanban, tasks
• Offline-first, local-first privacy

Monthly savings compared to the alternatives for a  team of 20 user is $200/month or $2,400/year

You can request AppFlowy today at Osuite

Internal Software Development

6. Appsmith

Website ↗️ |  GitHub ↗️ | ⭐️ 36.6k

Alternative to: Retool ($10-50 / user / mo)

Appsmith is a powerful low-code platform designed to help developers build, deploy, and maintain custom software applications more efficiently. Whether you need to create admin panels, internal tools, or dashboards, Appsmith provides the tools and flexibility to get the job done faster and more effectively. 

• Drag-and-drop UI builder, 40+ widgets
• DB & API connectors, JS logic
• Role-based access control

Monthly savings compared to the alternatives for a team of 5 devs is $250/month or $3,000/year

You can request Appsmith today at Osuite

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Product Analytics

7. Posthog

Website ↗️ |  GitHub ↗️ | ⭐️ 26.3k

Alternative to: Mixpanel, Amplitude ($20-140+ / mo)

PostHog is a comprehensive platform designed to help you analyze, test, observe, and deploy new features in your product. It combines multiple tools into a single, cohesive system, making it easier for developers to build successful products without needing to integrate various disparate tools.

• Event tracking, session replay
• Feature flags, A/B tests, funnels

Monthly savings compared to the alternatives for a  starts at $140/month or $1,680/year

Business Intelligence

8. Metabase

Website ↗️ |  GitHub ↗️ | ⭐️ 41.8k

Alternative to: Tableau Creator, Power BI Pro ($10-75 / user / mo)

Metabase is an open-source business intelligence tool that makes analytics accessible to everyone in your company. With its user-friendly interface, you can explore data, create dashboards, and generate insights without needing extensive technical knowledge.

• Interactive dashboards & visual SQL
• Scheduled reports, embed options

Monthly savings: 8 analysts save $340/month or $4,080/year

Start using Metabase today for free with Osuite: Metabase

Scheduling Platform

9. Cal.com

Website ↗️ |  GitHub ↗️ | ⭐️ 36.1k

Alternative: Calendly ($10-16 / user / mo)

Cal.com is an open-source scheduling platform designed to simplify the process of booking meetings. It eliminates the need for back-and-forth emails by integrating seamlessly with your existing calendars and providing a personalized booking link. 

• Booking links, round-robin, team pages
• Custom branding, webhooks, API

Monthly savings: 10 users save $160/month or $1,920/year

You can request Cal.com today at Osuite

Form Builder

10. Formbricks

Website ↗️ |  GitHub ↗️ | ⭐️ 10.5k

Alternative to: Typeform, SurveyMonkey ($25-39 / mo)

Formbricks revolutionizes how businesses collect and leverage customer feedback. This open-source experience management suite enables you to seamlessly gather insights at every touchpoint of the customer journey, helping you make data-driven decisions to enhance your product or service.

• Beautiful form builder with conditional logic
• In-app surveys, webhooks, data export

Monthly savings: $32/month or $384/year

You can request Formbricks today at Osuite

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Digital Signature Solution

11. Papermark

Website ↗️ |  GitHub ↗️ | ⭐️ 6.7k

Alternative to: DocuSign, Adobe Sign ($15-75 / user / mo)

Papermark revolutionizes document sharing and analytics for modern businesses. This open-source platform offers a seamless way to share documents securely while providing deep insights into recipient engagement.

• Secure document sharing & analytics
• Custom domains, version control, API

Monthly savings: team of 5 saves $230/month or $2,760/year

You can request Papermark today at Osuite

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Cost Comparison Analysis

Even after hosting costs, the stack above typically cuts 89-93% of software spend.

Conclusion

Open source isn't just cheaper—it's strategic leverage. Swapping proprietary SaaS for the stack above saves cash while boosting ownership, security, and customization.

Ready to Start your Open Source Journey? Osuite is building the open source app store, where you can easily one-click host every tool on this list. First $15 on us. Click here to start your open source journey.