The ten most profitable SaaS businesses on Startup Index right now, ranked by monthly net profit. Only listings where the seller has certified real margin data qualify — the 80% default margin is excluded on this page.
Absolute cashflow is a different signal than ROI. A $5,000/month SaaS priced at $200k is a better cashflow business than a $500/month SaaS priced at $8k, even though the latter has a higher percentage ROI. This page is for buyers who want the biggest cashflow they can afford — often a search funder, holdco operator, or SBA-backed acquirer.
$87.7K/mo in seller-certified net profit (40% margin on $219.4K MRR).
The #1 tool for validating phone, email and IP data in real time. All through one powerful API.
$40.2K/mo in seller-certified net profit (92% margin on $43.7K MRR).
Post your content to multiple social media platforms at the same time, all-in one place.
$31.2K/mo in seller-certified net profit (85% margin on $36.7K MRR).
The #1 AI platform for beating prediction markets. Analyze Polymarket, Kalshi & more with AI, copy top traders, track whales, and make smarter bets in seconds.
$31.2K/mo in seller-certified net profit (95% margin on $32.8K MRR).
The best QuickBooks Desktop & Enterprise API on the planet.
$26K/mo in seller-certified net profit (85% margin on $30.6K MRR).
All-in-one AI Local SEO Software
$25.6K/mo in seller-certified net profit (70% margin on $36.6K MRR).
Lunchbreak helps students and professionals make AI-generated content undetectable across all major detectors, including Turnitin and GPTZero, while keeping their natural tone and voice.
$21.5K/mo in seller-certified net profit (81% margin on $26.5K MRR).
Reddit marketing to improve AI search. SaaS helping business owners learn how to promote their products. Also provide tools and content creation for members.
$19.7K/mo in seller-certified net profit (70% margin on $28.1K MRR).
Atlas is a personalized learning platform for students. Atlas's AI studies your class materials to help you nail your homework and ace your tests.
$18.2K/mo in seller-certified net profit (70% margin on $26K MRR).
SEO stack is an SEO/marketing SaaS that offers data warehousing with AI. It is a rebuild of Google search console with Google analytics, it allows SEOs and marketers to get better results in search engines and LLMs, it also provides AI and LLM visibility tracking.
$16.9K/mo in seller-certified net profit (75% margin on $22.5K MRR).
StoryShorts helps to create short videos with AI based on text prompts.
Monthly net profit = MRR × seller-certified margin. Listings using the 80% default margin are excluded — a listing only qualifies if the seller has certified their real net margin. That's a strict definition: profitable AND transparent about the profit.
Because SaaS revenue is monthly and financing decisions are monthly. Monthly net profit tells you exactly what lands in your bank account after ownership transfer. Annualizing it (multiply by 12) is one operation away for anyone comparing to an asking price.
At the top, $3,000–$15,000/month of net profit is common. This corresponds to $5k–$25k MRR at 50–70% margin. The bottom of the top-10 usually starts around $500/month of net profit. Absolute figures vary week-to-week as listings sell or new ones arrive.
No — it's necessary but not sufficient. A $5,000/month profit SaaS priced at $500,000 pays back in 100 months (bad). The same SaaS at $150,000 pays back in 30 months (good). Look at asking price and payback in tandem with the profit number.
This page ranks purely on absolute monthly net profit — bigger business wins. The 'best this month' page uses a composite of ROI, payback, and margin — better deal wins. Use this page if you want maximum cashflow; use the composite page if you want the best value per dollar deployed.
The top few usually do — SBA 7(a) lenders typically want $30k+ annual SDE for software acquisitions, which corresponds to about $2,500/month net profit. Anything above that in the ranking is potentially SBA-financeable, assuming clean tax history from the seller (which is a separate check).
Monthly net profit scales with MRR, and MRR scales with asking price. The top entries here are usually $50k–$500k asking prices with $5k+ MRR. If you want the small-ticket version, sort by ROI instead — a $10k SaaS with $500 MRR at 70% margin has extraordinary ROI but modest absolute profit.
MRR is verified live via TrustMRR from Stripe / Paddle / RevenueCat. Margin is seller-certified. The profit number is the product of the two, so a false margin claim would misstate it — that's why we exclude assumed-margin listings from this page. Still, do the standard 12-month cost reconstruction during diligence before wiring funds.
In real time. When a listing sells and gets removed, the next one moves up. When a seller updates their MRR (TrustMRR refreshes automatically) or margin, the ranking recomputes on the next page view. The 'Updated {Month}' stamp reflects the current calendar month; underlying scores update continuously.
Not on this page — but multiplying monthly net profit by 12 gives you annual take-home. For ARR (annual recurring revenue) rankings, browse the full inventory at /buy-saas where you can see MRR × 12 in each listing card.