Idea

Freemium And Open Source

Freemium and Open Source Ideas

Ask the data real businesses · real revenue · cited

Matching your filters

28 businesses

79% founder-reported, the rest researched

<$10K

$10K+

$50K+

$100K+

$1M+

Median revenue

$40K /mo

Middle half earn $10K – $100K/mo

How they grow

Business models

Showing 28 of 28 case studies

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Built With

Appointment scheduling software

Book appointments, meetings, training sessions with a single, simple solution

calday.com

$6K /mo Reported

Affordable email marketing tool

Email marketing solution for bootstrappers.

maildroppa.com

$20K /mo Reported

Ai image and video maker

AI-powered image and video creation platform.

basedlabs.ai

$10K /mo Reported

Estimation and proposal platform

Estii: Pricing platform for service sales teams.

estii.com

$10K /mo Reported

All-in-one fitness software

Cloud-based management software for fitness businesses.

wellyx.com

$60K /mo Reported

Automated email organizer

"Email organizer extension for clutter-free inbox management."

usebaxter.com

—

Digital business card manager

Sales networking tool for seamless contact management.

wavecnct.com

$30K /mo Reported

Minimalist newsletter software

Newsletter platform for creators and bloggers.

buttondown.email

$1K /mo Reported

Dynamic QR code generator

Dynamic QR code generator for brands

hovercode.com

$200 /mo Reported

Digital sales room platform

Digital sales room software for B2B sales teams

dealpad.io

$200K /mo Reported

Contract creation platform

AI-powered contract creation for non-lawyers.

legislate.tech

$5K /mo Reported

Affordable all-in-one crm

Affordable FaaS CRM and customer support for SMBs.

onehash.ai

$10K /mo Reported

Data extraction API service

API for effortless web data extraction.

scrapingant.com

$20K /mo Reported

Simple website hosting tool

Drag-and-drop hosting for easy web sharing.

tiiny.host

$40K /mo Reported

Smart size chart solution

E-commerce sizing plugin for accurate clothing fit.

kiwisizing.com

$40K /mo Reported

Ai-driven process automation

AI-driven process automation for seamless business operations.

rapidautomation.ai

$60K /mo Reported

Seo-focused rendering service

SEO optimization tool for JavaScript websites.

prerender.io

$200K /mo Reported

End-to-end supply chain software

B2B supply chain automation and planning software.

inquizity.com

$30K /mo Reported

Customizable metric monitoring tool

Customized metric monitoring platform for developers and teams.

stateful.com

$200K /mo Reported

Sales-focused screen sharing

Screen sharing tool for telesales teams.

crankwheel.com

$60K /mo Reported

Focused writing platform

Privacy-focused writing platform for creative minds.

write.as

$10K /mo Reported

Cloud headless browser service

Browser automation infrastructure API for developers and AI agents

browserless.io

$300K /mo Reported

Error tracking and performance monitoring

Error tracking and performance monitoring for developers.

sentry.io

—

All-in-one business software

Open-source ERP platform with integrated business apps

odoo.com

$50M /mo Estimated

Idea	Revenue	Model	Growth	Customers	Tools	Details	Solo score A 0–100 estimate of how well-suited a business is to being run solo (or very lean). It blends team leanness, business model, growth channels, capital intensity, revenue per operator, tooling leverage and recency into one score. Higher = more solopreneur-friendly.
Appointment scheduling software calday.com Book appointments, meetings, training sessions with a single, simple solution	$6K /mo Reported	SaaS +2	Organic social media Product expansion	Solopreneurs +2	CU +1	Founded 2023 · 4 people · Built in 240 days	65	Build this
Affordable email marketing tool maildroppa.com Email marketing solution for bootstrappers.	$20K /mo Reported	SaaS +3	Affiliate program SEO +1	Solopreneurs +5	FI +19	Founded 2020 · Solo founder · $5K to start	86	Build this
BA Ai image and video maker basedlabs.ai AI-powered image and video creation platform.	$10K /mo Reported	Subscription +3	Affiliate program Word of mouth +1	Content Creators +7	CU +16	Founded 2023 · 2 co-founders · $500 to start	79	Build this
Estimation and proposal platform estii.com Estii: Pricing platform for service sales teams.	$10K /mo Reported	SaaS +1	Direct sales Pay Per Click Advertising +1	Service Providers +8	FI +15	Founded 2021 · 2 co-founders · $20K to start	71	Build this
All-in-one fitness software wellyx.com Cloud-based management software for fitness businesses.	$60K /mo Reported	SaaS +2	Word of mouth Direct sales +1	Fitness Business Owners +6	+18	Founded 2016 · 80 people · $50K to start	51	Build this
Automated email organizer usebaxter.com "Email organizer extension for clutter-free inbox management."	—	Subscription +2	Word of mouth Email marketing +1	Consumers +4	FI +18	Founded 2022 · Solo founder · $50K to start	88	Build this
Digital business card manager wavecnct.com Sales networking tool for seamless contact management.	$30K /mo Reported	SaaS +3	Direct sales SEO +1	Sales Teams +5	FI +30	Founded 2021 · 2 people · $5K to start	69	Build this
Minimalist newsletter software buttondown.email Newsletter platform for creators and bloggers.	$1K /mo Reported	SaaS +1	Word of mouth Referral Program +1	Independent Creators +3	+8	Founded 2016 · Solo founder · $100 to start	79	Build this
Dynamic QR code generator hovercode.com Dynamic QR code generator for brands	$200 /mo Reported	Freemium +1	Word of mouth SEO +1	Small Business Owners +3	EM +1	Founded 2021 · Solo founder · $100 to start	70	Build this
Digital sales room platform dealpad.io Digital sales room software for B2B sales teams	$200K /mo Reported ▼ 69% · 31 mo	Subscription +4	Word of mouth Direct sales +1	B2B Software (SaaS) Org... +3		Founded 2021 · 12 people · $200K to start	55	Build this
Contract creation platform legislate.tech AI-powered contract creation for non-lawyers.	$5K /mo Reported	Subscription +3	Word of mouth SEO	Non-lawyers creating co... +8		Founded 2020 · 12 people · $200K to start	61	Build this
Affordable all-in-one crm onehash.ai Affordable FaaS CRM and customer support for SMBs.	$10K /mo Reported	SaaS +2	Affiliate program Advertising on social media +1	Small businesses +16	+3	Founded 2020 · 7 people · $10K to start	59	Build this
Data extraction API service scrapingant.com API for effortless web data extraction.	$20K /mo Reported	SaaS +3	Affiliate program Referral Program +1	E-commerce Websites +7	+14	Founded 2020 · 2 people · Built in 30 days	76	Build this
Simple website hosting tool tiiny.host Drag-and-drop hosting for easy web sharing.	$40K /mo Reported	Subscription +2	Word of mouth Facebook Community +1	Designers +5	CR +5	Founded 2019 · Solo founder · $100 to start	84	Build this
Smart size chart solution kiwisizing.com E-commerce sizing plugin for accurate clothing fit.	$40K /mo Reported	SaaS +4	Word of mouth Advertising on social media +1	Ecommerce Sellers +3		Founded 2018 · Solo founder · $300 to start	80	Build this
Ai-driven process automation rapidautomation.ai AI-driven process automation for seamless business operations.	$60K /mo Reported	Automation +2	Word of mouth Direct sales	Hospitality Management ... +9	RA SH +3	Founded 2017 · 35 people · $200K to start	41	Build this
Seo-focused rendering service prerender.io SEO optimization tool for JavaScript websites.	$200K /mo Reported	SaaS +1	Word of mouth Advertising on social media +1	Developers interested i... +6		Founded 2013 · 4 people · Built in 30 days	76	Build this
End-to-end supply chain software inquizity.com B2B supply chain automation and planning software.	$30K /mo Reported	Services +7	Affiliate program Word of mouth +1	Pharmaceutical Companies +17	EX	Founded 2011 · 25 people · $50K to start	51	Build this
Customizable metric monitoring tool stateful.com Customized metric monitoring platform for developers and teams.	$200K /mo Reported	Subscription +1	Word of mouth Direct sales	Developers +3		Founded 2015 · 5 people · $300K to start	67	Build this
Sales-focused screen sharing crankwheel.com Screen sharing tool for telesales teams.	$60K /mo Reported	SaaS +2	Direct sales SEO	Sales Teams +3	AW +38	Founded 2015 · 3 people · Reykjavik, Iceland, Iceland	68	Build this
Focused writing platform write.as Privacy-focused writing platform for creative minds.	$10K /mo Reported	Subscription +2	Word of mouth SEO	Writers +5	+7	Founded 2015 · Solo founder · Washington D.C., Washington, D.C., USA, United States	73	Build this
Cloud headless browser service browserless.io Browser automation infrastructure API for developers and AI agents	$300K /mo Reported ▲ 300% · 32 mo	SaaS +1	Word of mouth SEO	Developers +2	+15	Founded 2017 · Solo founder · $500 to start	87	Build this
Error tracking and performance monitoring sentry.io Error tracking and performance monitoring for developers.	—	SaaS +2	Open-source community Leveraging existing platforms	Developers interested i... +6		Founded 2012 · 2 co-founders · San Francisco, CA, USA, United States	74	Build this
All-in-one business software odoo.com Open-source ERP platform with integrated business apps	$50M /mo Estimated	Subscription +2	Word of mouth Partnerships +1	Small and Medium-Sized ... +2		Founded 2005 · 5,000 people · $3M to start	63	Build this

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Idea	Revenue
Crm marketing attri...	$100K/mo
No-code Airtable AP...	$20K/mo
Pdf bank statement ...	$40K/mo
Ai music video gene...	$20K/mo