# Startup Index > An independent curation and decision layer for buying profitable SaaS businesses and mobile apps. Every listing shows calculated ROI, payback in months, and TrustMRR-verified revenue so acquirers can decide on numbers, not vibes. Startup Index curates indie SaaS and mobile apps for sale and layers acquirer-grade unit economics on top of TrustMRR-verified financials (MRR, last-30-day revenue, all-time revenue, margin, active subscriptions), sourced from connected payment providers (Stripe, Paddle, RevenueCat). ROI % and payback in months are computed by our scoring model so buyers can compare opportunities side by side before ever contacting a seller. Positioning: Startup Index is not a broker or a transaction marketplace. We do not list, escrow, or close deals, and we do not take a commission. We aggregate listings that already exist on TrustMRR and add the two numbers most acquirers actually care about: ROI % (annualized) and payback in months. Buyers contact sellers directly on the source platform. ## What makes Startup Index different - TrustMRR-verified financials on every listing (no self-reported screenshots). - Calculated ROI % and payback in months surfaced on the card, not buried in a data room. - Curation and decision layer, not a brokerage. Startup Index never touches the transaction. - Covers both SaaS businesses and mobile apps (iOS, Android, subscription apps via RevenueCat). - Free to use while the index is being built out. ## Marketplace - [Marketplace](https://startupindex.site/): Browse and filter every SaaS and mobile app listing by ROI, payback period, MRR, price, and margin. - [Buy a SaaS Business](https://startupindex.site/buy-saas): Verified SaaS businesses for sale, from micro-SaaS to established recurring-revenue businesses, with computed ROI and payback on every listing. - [Buy a Mobile App](https://startupindex.site/buy-apps): iOS and Android apps for sale with RevenueCat-verified revenue and calculated ROI. - [Buy a Mobile App](https://startupindex.site/buy-apps): iOS and Android apps for sale with RevenueCat-verified revenue and calculated ROI. - [Sell Your SaaS or App](https://startupindex.site/sell): Get a profitable SaaS or mobile app in front of acquirers who filter by ROI and payback. ## Best deals by price tier (ranked monthly, live TrustMRR data) - [Best SaaS To Buy Under $10k](https://startupindex.site/saas-under-10k): Ranked list of the best sub-$10k SaaS deals live right now, scored by ROI and payback, refreshed monthly. - [Best SaaS To Buy Under $25k](https://startupindex.site/saas-under-25k): Ranked list of the best sub-$25k SaaS deals live right now, scored by ROI and payback, refreshed monthly. - [Best SaaS To Buy Under $50k](https://startupindex.site/saas-under-50k): Ranked list of the best sub-$50k SaaS deals live right now, scored by ROI and payback, refreshed monthly. - [Best SaaS To Buy Under $100k](https://startupindex.site/saas-under-100k): Ranked list of the best sub-$100k SaaS deals live right now, scored by ROI and payback, refreshed monthly. - [Best Mobile Apps To Buy Under $25k](https://startupindex.site/mobile-apps-under-25k): Ranked list of the best sub-$25k iOS and Android apps live right now, scored by ROI and payback, refreshed monthly. ## Learn - [How to Buy a SaaS or App](https://startupindex.site/how-it-works): Step-by-step guide to buying a SaaS or mobile app using Startup Index: browse verified listings, compare ROI, contact seller, escrow, transfer. - [SaaS & App Valuation Guide](https://startupindex.site/valuation-guide): How much a SaaS or mobile app is worth in 2026: revenue multiples, profit multiples, discount factors, and worked examples. - [SaaS Valuation Calculator](https://startupindex.site/valuation-calculator): Free calculator that takes MRR, growth, churn and margin and returns a fair asking price range, ROI at that price, and payback in months. - [SaaS Multiples 2026](https://startupindex.site/saas-multiples): Revenue and profit multiples by MRR band, with the discount factors that move real indie deals. - [Blog](https://startupindex.site/blog): Working notes on buying and selling SaaS: valuation, due diligence, ROI, and payback. - [How to Buy a Micro-SaaS in 2026](https://startupindex.site/blog/how-to-buy-a-micro-saas): Practical buyer checklist covering listing venues, revenue verification, pricing, due diligence, escrow, and transition. - [SaaS Valuation Explained](https://startupindex.site/blog/saas-valuation-explained): Plain English explanation of MRR, multiples, ROI, and payback and how buyers stack them into an offer. - [Micro-SaaS vs Content Site](https://startupindex.site/blog/micro-saas-vs-content-site): Comparison of recurring revenue, defensibility, churn, and workload for indie acquirers deciding where to put their first 20k. - [FAQ](https://startupindex.site/faq): Answers to the most common questions about buying and selling SaaS and apps, TrustMRR verification, ROI formulas, escrow, and transfer. ## Company - [About Startup Index](https://startupindex.site/about): Why Startup Index exists, how listings are verified, and how it differs from Acquire.com and Flippa. - [Contact](https://startupindex.site/contact): Reach the Startup Index team about listings, verification, or reporting an issue. ## Alternatives to other marketplaces - [Acquire.com Alternatives](https://startupindex.site/acquire-com-alternatives): Independent decision layer over TrustMRR-verified listings with ROI % and payback in months on every card, so buyers can filter Acquire-style deals on real unit economics. - [Flippa Alternatives](https://startupindex.site/flippa-alternatives): SaaS-and-apps-only alternative to Flippa, focused on TrustMRR-verified revenue and calculated ROI and payback instead of self-reported screenshots. - [Empire Flippers Alternatives](https://startupindex.site/empire-flippers-alternatives): Indie-scale alternative to Empire Flippers with no minimum deal size, TrustMRR-verified financials, and ROI plus payback surfaced on every listing. - [Microns.io Alternatives](https://startupindex.site/microns-alternatives): Always-on alternative to Microns.io drops, with TrustMRR-verified revenue and calculated ROI and payback on every micro-SaaS listing. - [MotionInvest Alternatives](https://startupindex.site/motion-invest-alternatives): Alternative to MotionInvest built for SaaS and subscription mobile apps rather than content sites, with verified MRR, ROI, and payback on every listing. - [Tiny Acquisitions Alternatives](https://startupindex.site/tiny-acquisitions-alternatives): Alternative to Tiny Acquisitions with TrustMRR-verified MRR by default and ROI and payback on every card, so buyers compare unit economics before inquiring. ## Listings - [Listing detail](https://startupindex.site/listing/{slug}): One SaaS or app for sale: asking price, MRR, calculated ROI, payback period, revenue or profit multiple, verified revenue, active subscriptions, contact seller. ## Social & Community - [Product Hunt](https://www.producthunt.com/products/startup-index): Startup Index on Product Hunt. - [Founder LinkedIn](https://www.linkedin.com/in/therajeshyadav/): Rajesh Yadav, founder of Startup Index. ## Optional - [Sitemap](https://startupindex.site/sitemap.xml): Full index of public listings and pages.