Startups Making $50k+/mo

What Converts is a lead tracking and reporting SaaS platform born from Michael Cooney's pain point running a digital marketing agency. Bootstrapped and built over 6 months with co-founder Jeremy, the company launched in March 2015 and grew from five agency clients to over 1,000 customers doing $2.2M ARR, competing against well-funded rivals by focusing on superior product quality and word-of-mouth growth.

BillB is a bootstrapped B2B SaaS platform launched in 2015 that provides e-commerce backend tools (invoicing, shipping, inventory management) for small businesses selling across multiple channels. Growing 70% year-over-year with 9,000+ paying customers, the company generates $2.2M ARR while maintaining 25-30k monthly profit through platform partnerships—particularly Shopify—which drive over 50% of signups.

Dane Maxwell built Paperless Pipeline in 2009 as a bootstrapped SaaS for real estate transaction management. By identifying an existing pain point (agents managing paperwork inefficiently) rather than trying to create new behavior, he grew the product to 1,460 customers generating $180-185k MRR ($2.1M ARR). After stepping away years ago, the fully self-managed business continues to thrive under a CEO with 25% profit margin incentives.

OneIO is a B2B integration hub enabling business service providers to integrate subcontractors and internal teams without technical development. The company has grown to 40 enterprise customers with $180k MRR (up 80% YoY from $95k) and operates at break-even with exceptionally low 0.1% annual revenue churn and a 2.2 LTV:CAC ratio. Recently raised $1.4M in Series A funding to scale the 15-person team based in Finland and the UK.

Stackify is an Application Performance Monitoring (APM) SaaS platform founded by Matt Watson in 2012 to help software developers debug and troubleshoot production applications. The company bootstrapped to $1.2M ARR by 2017 with 900+ customers before raising $3M in outside capital, achieving 80% year-over-year growth driven primarily by content marketing that generates 800,000 website visitors monthly.

Hire Mojo is a bootstrapped SaaS recruiting automation platform founded by serial entrepreneur John Younger in January 2015 as a spinoff from his recruitment process outsourcing company Acolo. The platform uses a recruiter bot and gamified 'mojo points' system to help companies fill jobs without recruiting expertise, targeting the 6 million open US job positions. With 200 customers, ~$180k MRR (up 3x from $60k a year prior), 90%+ renewal rates, and a lean 10-person team in San Francisco, the company is growing 8-12% monthly through word-of-mouth referrals.

funnel.io automates marketing reporting and analysis for e-commerce companies and online marketers, eliminating reliance on spreadsheets. Founded by Frederick Scansy in 2014 and launched in beta in 2015, the company has grown to 340+ customers paying an average of $525/month, generating $2.2M ARR with 180K MRR and low 2.8% monthly logo churn. They raised $13M total ($3M seed funding and $10M Series A at $20M pre, $30M post valuation) and employ 37 people across Stockholm and Boston offices.

Edgar is a social media scheduling SaaS founded by Laura Roeder in mid-2014 that automatically cycles through a library of content instead of requiring manual one-off posting. Launched with bootstrapped $100k investment and an 80,000-person email list, Edgar grew to nearly 4,000 customers by January 2016 with $2.2M ARR ($180k MRR) at $49/month average, using Facebook ads ($30k/month) and content marketing as primary growth channels while maintaining a healthy 95% monthly retention rate.

Abstract is a real-time conversational intelligence platform that uses Google's NLP and machine learning to coach sales reps during calls—telling them what to say and how to handle objections in the moment, rather than analyzing failures after the deal is lost. Founded by Greg Raffner in early 2020, Abstract launched in April 2021 and reached $178k MRR ($2.1M ARR) within 5 months through a laser-focused SEO strategy targeting 'conversational intelligence software' and related keywords, even outranking $10B competitor Gong. Operating with just 2 US employees plus contractors in India and Indonesia, Greg has raised only $630k total while achieving exceptional capital efficiency and preserving equity.

Tilke is a SaaS platform founded in 2012 by Tim that helps companies optimize their sales processes by removing randomness from follow-ups and adding intelligence to proposals. The company has grown from 800 customers with $100k MRR in December 2016 to 1,600 customers generating ~$175k MRR (including ~$25k in professional services), nearly doubling year-over-year. Tilke maintains healthy unit economics with a $160 CAC, ~2-month payback period, and 6% monthly logo churn.

Pro Sky is a SaaS marketplace that connects companies with qualified college students for recruitment and project-based testing before hiring. Founded by Crystal Huang and accepted into 500 Startups in October 2014, the company grew from $21k MRR with 400 students to $171k MRR by July 2015 with 60+ paying companies. The platform generates 75% revenue from companies paying $500-$5,000/month and 25% from students paying $249 per training course.

Matboard and More is the number one online retailer of custom matting and framing in the US, founded in 2012 by Mehdi Kajbaf and co-founders. The company achieved $170,000/month in revenue primarily through a focused digital marketing strategy centered on Google's search engine (both PPC and SEO), spending thousands of dollars to optimize campaigns over several years. Kajbaf's background as an engineer and MBA graduate, combined with disciplined iteration on marketing ROI and website conversion optimization, transformed a simple initial website into a market-leading e-commerce platform.

Simplero is a bootstrap SaaS platform built by Calvin Corelli in 2009 that helps coaches, information marketers, and educators run their entire business through one integrated tool. Starting from his own need to teach online courses, Calvin grew the company to $2M ARR through word-of-mouth and personal service, largely by avoiding expensive marketing tactics and focusing on deep customer relationships and product quality.

Walls.io is a bootstrapped SaaS social media wall platform launched in 2014 by Michael Komleitner in Vienna, Austria. The company aggregates user-generated content from multiple social media platforms and displays it on physical screens for events, retail locations, and websites. With 500 customers generating $166,000 monthly in revenue (up from $70,000 a year prior), Walls.io demonstrates 60-70% year-over-year growth despite 10% monthly churn in its event-focused segment.

VFairs is a bootstrapped SaaS platform for virtual event management launched in 2016 by Mohamed Yunus, serving Fortune 500 companies, universities, and government organizations. The company has achieved $165,000 MRR ($1.98M ARR) with 100% year-over-year growth, driven primarily by word-of-mouth from high-satisfaction enterprise customers. With a hybrid pricing model ($30,000 annual licenses and $6,000 per-event pricing), VFairs maintains 95% retention on annual contracts and 80% repeat business, demonstrating strong product-market fit.

Revenue Cat is a SaaS platform providing SDKs and APIs that help mobile app developers implement in-app subscriptions without building complex backend infrastructure. Founded by Jacob Eiting and Miguel in 2017, the company grew from $0 MRR with heavy reliance on content marketing (6-12 hours/week writing technical blog posts) to $400 MRR after 2 months of consistent content, then to $7K MRR by late 2018. After joining Y Combinator and raising a $1.5M seed round, Revenue Cat leveraged a smart pricing structure aligned with customer revenue growth and strong word-of-mouth to reach $161K MRR ($1.93M ARR) by July 2020, with continued month-over-month growth driven by expansion revenue and organic adoption within the developer community.

Cento One is an AI-powered social listening and customer engagement platform founded in October 2011 by Camille Bargole. The company has grown to 450 customers paying an average of $350/month (generating ~$157k MRR), with a team of 65 people across Poland, Munich, Prague, and Budapest. Growing 30-50% year-over-year with a healthy 3.5% annual revenue churn and $2,000 CAC, they recently raised $5M and are seeking $6-7M more at a $22M pre-money valuation.

Price2Spy is a Serbian SaaS for monitoring competitor prices that grew from an internal tool at Misha Krunic's e-commerce business into a $155k/month business with 650 clients and 104 employees. Launched in April 2011, the company achieved profitability from day one and has maintained 25-30% year-on-year growth through organic/SEO marketing, content blogging, and strategic conference attendance.

Yellow Dog, founded in 2015 by Simon Ponsford, is a cloud acceleration platform that licenses compute power based on core hours used. Starting with animation and rendering studios needing capacity for 4K workflows, the company has expanded into financial services and life sciences. Growing from $30,000 MRR a year ago to $150,000 MRR today, Yellow Dog has raised approximately $8 million across multiple rounds including crowdfunding, angel, and VC funding.

WIMI is a French SaaS platform launched in 2010 that provides project management and teamwork collaboration tools including instant communication, document sharing, task management, calendaring, and video conferencing. The company has grown to ~1,000 paying customers generating $150,000 in MRR with 50% year-over-year growth, achieving 100% net revenue retention through a combination of 20% annual churn and 20% expansion revenue. With a team of 25 and $3.3M raised through seven small funding rounds, WIMI has established itself as a credible alternative to US-based competitors in the European market, particularly targeting architects, consultants, and industry-specific teams.