# Fortress OS > Fortress OS is the all-in-one property management system built for property operators. It covers accounting, leasing, maintenance, payments, compliance, resident communication, and reporting in one platform. ## Solutions - [Accounting](https://fortresstech.io/solutions/accounting): Property accounting and reconciliation. - [Leasing](https://fortresstech.io/solutions/leasing): Online leasing and applications. - [Maintenance](https://fortresstech.io/solutions/maintenance): Work orders and maintenance tracking. - [Marketing](https://fortresstech.io/solutions/marketing): Property marketing and listings. - [Reporting](https://fortresstech.io/solutions/reporting): Portfolio reporting and analytics. - [Resident Portal](https://fortresstech.io/solutions/resident-portal): Payments, requests, and communication for residents. - [Websites](https://fortresstech.io/solutions/websites): Property websites built for operators. ## Products - [Fortress Core](https://fortresstech.io/products/fortress-core): The core property management platform. - [Leslie AI](https://fortresstech.io/products/ai-leasing-leslie): The AI leasing assistant for multifamily and affordable housing: texts and follows up with prospects, nudges unfinished applications, and routes eligibility questions to staff. - [Fortress HUB](https://fortresstech.io/products/fortress-hub): The onsite team workspace. - [MyFortress](https://fortresstech.io/products/myfortress): The resident mobile app. - [Payments](https://fortresstech.io/products/payments): Online rent collection and payments. - [Compliance](https://fortresstech.io/products/fortress-compliance): Affordable housing compliance. - [Utility Billing](https://fortresstech.io/products/utility-billing): Resident utility billing and recovery. ## By Market - [Affordable Housing](https://fortresstech.io/affordable-housing-property-management-software): For affordable housing operators. - [Conventional](https://fortresstech.io/by-market/conventional): For conventional multifamily. - [Mixed-Use](https://fortresstech.io/by-market/mixed-use): For mixed-use portfolios. - [Commercial](https://fortresstech.io/by-market/commercial): For commercial property. ## Resources - [Blog](https://fortresstech.io/blog): Guides and articles for property operators. - [Case Studies](https://fortresstech.io/resources/case-studies): Real operator results. - [FAQs](https://fortresstech.io/resources/faqs): Common questions about Fortress OS. - [Glossary](https://fortresstech.io/glossary): Property management terms explained. - [Integrations](https://fortresstech.io/integrations): Partner integrations and marketplace. - [Compare](https://fortresstech.io/compare): How Fortress OS compares to other systems. ## Company - [Mission](https://fortresstech.io/about/mission): What Fortress OS is building and why. - [Team](https://fortresstech.io/about/team): The people behind Fortress OS. - [Contact](https://fortresstech.io/contact): Get in touch or book a demo. ## Affordable housing property management software (in depth) - [What LIHTC compliance software actually has to do](https://fortresstech.io/blog/lihtc-compliance-shouldnt-feel-like-walking-a-tightrope): Where LIHTC files go wrong and what software should catch first. - [HOTMA, in plain terms](https://fortresstech.io/blog/whats-hot-with-hotma-4-key-points-to-note): The four rule changes that move work onto your site teams. - [Why compliance is an operations problem](https://fortresstech.io/blog/affordable-housing-compliance-is-the-foundation-for-growth): Compliance is what caps how fast a portfolio can grow. - [Section 8 rent calculator](https://fortresstech.io/section-8-rent-calculator): Run the tenant-rent math the way HUD does it. - [What is affordable housing property management software](https://fortresstech.io/blog/what-is-affordable-housing-property-management-software): The beginner answer: what it covers and what it doesn't. - [How Section 8 rent math actually works](https://fortresstech.io/blog/section-8-rent-math-for-operators): Contract rent, utility allowance, TTP, and where teams get it wrong. - [Online applications built for affordable](https://fortresstech.io/solutions/applications): Income docs, waitlists, and eligibility without the paper chase. - [Shortening the affordable application](https://fortresstech.io/blog/affordable-housing-applications-dont-have-to-feel-like-running-a-marathon): What a long application costs you in lost applicants. - [USDA Rural Development compliance software](https://fortresstech.io/blog/usda-rural-development-compliance-software): MINC submissions, RD 515 files, and what the 3560 handbook expects. - [Workforce housing management software](https://fortresstech.io/blog/workforce-housing-management-software): Running mixed-income and workforce units without a second system. - [Getting files ready for review](https://fortresstech.io/blog/how-to-prepare-affordable-housing-files-for-review): What reviewers pull first and how to have it ready before they ask. - [Simplifying resident certification workflows](https://fortresstech.io/blog/how-to-simplify-resident-certification-workflows-affordable-housing): Why certification work gets re-handled at every stage, and what a single resident record fixes. - [Why disconnected property management software breaks workflows](https://fortresstech.io/blog/disconnected-property-management-software): Where regulated-program operations break at the seams between systems, and what connecting them changes. - [What makes affordable housing software useful](https://fortresstech.io/blog/what-makes-affordable-housing-software-useful): How one income change moves through HUD, RD, and LIHTC rules in a layered file. - [How to choose affordable housing software](https://fortresstech.io/blog/how-to-choose-affordable-housing-pms-in-2026): The buying guide: what to demo, what to ask, what to ignore. - [Self-guided demo](https://fortresstech.io/self-guided-demo): Walk the product yourself. No call required. - [Switching affordable housing software](https://fortresstech.io/blog/switching-affordable-housing-property-management-software): Data migration, file history, and what breaks mid-move. - [Affordable housing software vs standard PM platforms](https://fortresstech.io/blog/affordable-housing-software-vs-standard-pm-platforms): Which platforms publish LIHTC, HUD, and RD support, and what compliance actually requires. - [Best affordable housing software for HOTMA compliance](https://fortresstech.io/blog/best-affordable-housing-software-hotma-compliance): How the six major platforms document HOTMA readiness, and what to make them show you. - [J&A: 7,600+ Rural Development units](https://fortresstech.io/resources/case-studies/ja): An RD portfolio that runs its budget tool inside Fortress. - [Emerald Housing Management](https://fortresstech.io/resources/case-studies/emerald-housing-management): An affordable operator's move off disconnected systems. - [Two Plus Four Companies](https://fortresstech.io/resources/case-studies/two-plus-four): Moving off a legacy platform without stalling operations. - [Elmington](https://fortresstech.io/resources/case-studies/elmington): Scaling an affordable and conventional mixed portfolio. ## Property management accounting software (in depth) - [Benefits of property management accounting systems](https://fortresstech.io/blog/benefits-of-property-management-accounting-systems): What a dedicated accounting setup does for a property team. - [Property management bookkeeping best practices](https://fortresstech.io/blog/10-property-management-bookkeeping-best-practices): Ten habits that keep property books clean at month-end. - [Best accounting software for property managers](https://fortresstech.io/blog/best-accounting-software-for-property-managers): What to compare before you buy, and how it should connect to operations. - [Sage Intacct integration](https://fortresstech.io/sage-intacct-fortressos-integration): Deposits, final account statements, and GL balances between Fortress and Sage Intacct. - [Walker & Dunlop client](https://fortresstech.io/resources/case-studies/walker-dunlop-client): A mixed portfolio that kept Sage Intacct and connected it to Fortress. ## AI leasing assistant for affordable housing (in depth) - [The state of AI in leasing](https://fortresstech.io/blog/state-of-ai-leasing-agents): What AI leasing tools have proven in 2026, and what they still promise. - [AI leasing in affordable housing](https://fortresstech.io/blog/ai-leasing-in-affordable-housing): What AI can handle at income-restricted properties, and what stays with people. - [The Fair Housing Act and AI leasing](https://fortresstech.io/blog/fair-housing-act-ai-leasing): What the law expects from an automated leasing tool. - [Affordable housing waitlist management](https://fortresstech.io/blog/affordable-housing-waitlist-management): Keeping the list current without breaking selection rules. - [Language access in affordable housing](https://fortresstech.io/blog/language-access-affordable-housing): Answering Spanish-speaking prospects, and what language access still requires. - [Online applications built for affordable](https://fortresstech.io/solutions/applications): Income docs, waitlists, and eligibility without the paper chase.