# NorthStar HQ > We build AI web and mobile apps for work where mistakes are expensive, on your own data, with a person approving what the AI writes. Pilots from US$2,400. ## Prices In US dollars, with no hourly rates. Details: https://northstarhq.ai/pricing/ Monthly plans: - Care: US$599 a month. For a live app: fixes, monitoring, and model and security updates. Capacity: 20 hours a month. Who you get: A senior builder, with a shared tester. For example: Keeping a live AI feature accurate, such as support triage after launch. - Pilot: US$1,199 a month. One AI feature on your own data, measured against the task it replaces. Capacity: 40 hours a month. Who you get: A lead builder, with a shared AI engineer and tester. For example: One AI feature or one or two automations, such as a quality gate or lead scoring. - Build: US$4,799 a month. Your app's version 1, one 5 to 6 week phase at a time. Capacity: One full-time engineer, about 160 hours. Who you get: A dedicated AI engineer with a lead reviewing, a shared designer and tester, and a project manager. For example: Version 1 of an AI app, such as a voice agent or ask your data. - Squad: US$9,599 a month. Two features at once, or version 1 on web and mobile together. Capacity: Two full-time engineers, about 320 hours. Who you get: Two engineers with a lead reviewing, a shared designer and tester, and a project manager. For example: Two AI features in parallel, such as a support assistant and its quality gate. - Product team: US$14,399 a month. Web plus iPhone and Android, or a platform rebuilt module by module. Capacity: Three full-time people, about 480 hours. Who you get: A lead and two specialists you choose from AI, web, mobile, data or design, plus a shared tester and project manager. For example: An AI product on web and mobile, like the Parallel Completions platform. Before a plan: the scoping call is free, and the AI blueprint is US$1,800 fixed for 1 to 2 weeks, taken off your first month if you go on. AI running costs: you pay what the model and hosting providers charge, with no markup, under a monthly cap you set. Most clients start with the AI blueprint, run Build, Squad or Product team for 3 to 6 months, then step down to Care. Founding clients: the first two teams to pilot each new use case get the AI blueprint free, in return for a named case study. Agencies: any plan can be delivered under your brand, under NDA. Month to month; 30 days of notice to change or stop; 10% off paid quarterly; 15% off paid yearly. How a build runs, step by step: - Scoping call: Free. 30 minutes. 30 minutes on the problem, the users and the data. You get: A written next step. - AI blueprint: US$1,800 fixed. 1 to 2 weeks. Discovery, your use cases ranked by return, a clickable prototype and a fixed estimate. You get: A plan you own, whoever builds it. - Pilot: US$2,400. 4 to 6 weeks a module. One AI feature or module on your own data, measured against the task it replaces. You get: A go or stop on version 1. - Version 1: US$7,200 web, US$14,400 both stores. 5 to 6 weeks a web phase. The app or module, released to your users or to the app stores. You get: A live app. - Run and grow: US$599 a month. Monthly. Support, or a monthly team for features, fixes, releases and security. You get: A report every month. ## Pages - [AI Web and Mobile App Development](https://northstarhq.ai/): We build AI web and mobile apps for work where mistakes are expensive, on your own data, with a person approving what the AI writes. Pilots from US$2,400. - [Book a 30-Minute Scoping Call](https://northstarhq.ai/book/): Book a 30-minute video call to scope your AI app. Bring the problem, who would use it and, if you can, a sample of your data. No slides. - [AI Automation Library: 20 Small Automations](https://northstarhq.ai/automation-library/): Twenty small AI automations for sales, support, engineering and reporting teams, each with a concept screen. Most fit the Pilot plan. - [Pricing for AI App Builds](https://northstarhq.ai/pricing/): Monthly plans in US dollars for AI app builds: Care, Pilot, Build and a full product team. A set team each month, no timesheets, no hourly rates. - [How We Build AI Apps That Have to Be Right](https://northstarhq.ai/how-we-build/): The rules every build follows, from first prototype to monthly team: people approve what the AI writes, security from phase one, a backup model. - [AI Idea Finder: 3 Ideas in 4 Questions](https://northstarhq.ai/idea-finder/): Answer four questions about your industry, team, slowest task and where your data lives, and get three AI use cases ranked by fit. No email asked. - [AI App Cost Estimator](https://northstarhq.ai/estimate/): Pick what you want built and answer four questions to get a range in weeks and a price band for your AI app, before any call. No email asked. - [AI Use Cases You Could Build](https://northstarhq.ai/use-cases/): AI apps you could build, each with what you get, how it works, what it costs and how your data is handled. Filter by team, industry, format or size. - [Build Notes from Our AI App Work](https://northstarhq.ai/notes/): Weekly notes from our AI app builds: what we shipped, one thing we learned from it, and the use case each note ties to. - [Blog on Building AI Web and Mobile Apps](https://northstarhq.ai/blog/): Plain answers on building AI apps: what they cost, how long they take, who checks the AI's work, and what to ask before you start. ## Services - [AI Web App Development](https://northstarhq.ai/services/ai-web-app-development/): Portals, approval flows, dashboards and AI search on your own data. Each web phase goes live in 5 to 6 weeks, and people approve what the AI writes. ## Use cases - [AI Support Inbox Triage](https://northstarhq.ai/use-cases/support-inbox-triage/): An AI that sorts every support email and drafts a reply citing your help articles. Your team reviews and sends; it never writes to a customer on its own. - [AI Voice Agent That Answers Calls and Books](https://northstarhq.ai/use-cases/ai-voice-agent/): An AI voice agent that answers every call, books into your calendar and hands over to a person when it should. It says it is an AI on every call. - [AI Support Assistant for Your Site and WhatsApp](https://northstarhq.ai/use-cases/ai-support-assistant/): An AI assistant on your website and WhatsApp that answers from your own docs, links the source and passes what it can't answer to your team. - [AI Lead Qualification Agent for Inbound Leads](https://northstarhq.ai/use-cases/ai-lead-qualification/): An AI agent that looks up every new lead, scores it against your best customers and routes it to the right rep, with a first email drafted. - [AI Proposals and Estimates From Your Past Work](https://northstarhq.ai/use-cases/ai-proposal-generator/): An AI that drafts proposals, scopes and estimates from your past projects and price list, with every number traced to its source for you to check. - [Ask Your Data: AI Answers From Your Database](https://northstarhq.ai/use-cases/ai-ask-your-data/): Ask questions about your business in plain English and get answers from your own database and CRM, with the query shown so your team can check it. - [AI Quality Gate That Checks Every Output](https://northstarhq.ai/use-cases/ai-quality-gate/): An AI quality gate that checks every draft, ad, reply or AI answer against your rules and claims list before it ships, and holds what fails. - [Connect Your Tools to Claude and ChatGPT (MCP)](https://northstarhq.ai/use-cases/connect-tools-to-claude/): We build MCP connectors that let Claude or ChatGPT read and act in your own tools, with each person signed in, read-only first and every call logged. - [AI Agent and MCP Security Audit, Fixed Fee](https://northstarhq.ai/use-cases/ai-agent-security-audit/): A fixed-fee audit of every AI agent, MCP connector and API key your team uses: what each can reach, what is exposed, and a ranked fix list. - [AI Search Over Your Drive, Slack and Email](https://northstarhq.ai/use-cases/company-search/): Ask a question and get an answer from your own documents, chats and email, with the sources linked and only what you're allowed to see. - [AI Document Extraction: PDFs Into Clean Data](https://northstarhq.ai/use-cases/document-extraction/): AI that reads invoices, forms, tenders and scans into clean data, scores every field and sends the unsure ones to a person before they reach your system. - [AI CEO Dashboard That Plans Your Day](https://northstarhq.ai/use-cases/ceo-dashboard/): A morning page that pulls your numbers, inbox and calendar together, says what changed and plans your day, with every number linked to its source. - [AI Medical Scribe That Drafts the Visit Note](https://northstarhq.ai/use-cases/ai-scribe/): An AI scribe that listens to the visit and drafts the note for the clinician to review and sign, with consent asked first and data kept in your region. - [AI Invoices From Voice Notes, Payments Matched](https://northstarhq.ai/use-cases/invoices-from-voice-notes/): Say what the job was and the AI drafts the invoice. Payments in email and the bank feed are matched to it, and a person approves each one. - [AI Agent That Writes Your Weekly Reports](https://northstarhq.ai/use-cases/weekly-reports-agent/): An AI agent that runs on a schedule, pulls the numbers, checks what is overdue and drafts each weekly report for a person to check and send. - [AI Meeting Notes Into Tasks and Follow-Ups](https://northstarhq.ai/use-cases/meeting-notes-to-tasks/): An AI that turns each meeting into notes, tasks with owners and dates, and a follow-up email for you to send, in the tools your team already uses. - [AI Tender and RFP Reader for Bid Teams](https://northstarhq.ai/use-cases/rfp-tender-reader/): An AI that reads each tender or RFP, pulls the dates, scope and must-haves into a checklist, and flags the clauses your bid team should read first. - [Completions Tracking App From Check to Handover](https://northstarhq.ai/use-cases/completions-tracking/): A completions app for capital projects: every check and test record tracked by system, approved by the right person, and handover packs drafted. - [Offline Field Inspection App for Crews on Site](https://northstarhq.ai/use-cases/offline-field-inspection-app/): A mobile inspection app that works without signal, takes photos and signatures, and syncs to your system with AI checks when it reconnects. - [Clickable App Prototype in a Week](https://northstarhq.ai/use-cases/clickable-prototype/): A clickable prototype of your app idea in the first week of the AI blueprint, so you and your users can try it before any code is written. - [MVP Web App With Login, Payments and Admin](https://northstarhq.ai/use-cases/mvp-web-app/): An MVP web app built in 5 to 6 week phases, with sign-in, payments, an admin area and your AI feature, on a stack you own and can grow. - [Legacy Platform Rebuild, One Module at a Time](https://northstarhq.ai/use-cases/legacy-platform-rebuild/): We rebuild legacy platforms on a modern stack one module at a time, with the old app running until each part is replaced, as we did for Parallel Completions. ## Client work - [Case Study: Parallel Completions Rebuild](https://northstarhq.ai/work/parallel-completions/): How we moved Parallel Completions' field platform from Angular and Ionic to React and TypeScript, shipped it to iPhone and Android, and kept the old app live. ## Demos - [AI Document Extraction Demo](https://northstarhq.ai/demos/document-extraction/): Try it live: an invoice, tender or inspection form read field by field with a confidence score, and the unsure fields sent to a person to check. ## Industries - [AI Apps for Energy and Construction](https://northstarhq.ai/industries/energy-construction/): AI apps for completions, inspections, tenders and handover packs, built for field and project teams, with a person signing off what the AI fills in. ## Cost guides - [How Much Does an AI Web App Cost?](https://northstarhq.ai/cost/ai-web-app/): An AI web app costs from US$7,200 a phase, 5 to 6 weeks each. Pilots start at US$2,400; a pilot plus one to three phases comes to US$9,600 to 24,000. ## Build notes - [Why the Inbox Draft Cites Two Articles](https://northstarhq.ai/notes/why-the-inbox-draft-cites-two-articles/): Why every AI draft in our support inbox build names the help articles it used, and why it now cites at most two instead of every match. ## Blog - [What an AI Pilot Costs, and What You Get](https://northstarhq.ai/blog/what-an-ai-pilot-costs/): What an AI pilot costs: a free scoping call, a US$1,800 AI blueprint, then a 4 to 6 week pilot from US$2,400 that ends in a go or stop. ## Optional - [Terms of Use](https://northstarhq.ai/terms/): The terms for using northstarhq.ai, including how to read the prices, estimates and demos on the site, who owns the content, and governing law. - [Privacy Policy](https://northstarhq.ai/privacy/): What northstarhq.ai collects through the booking form and analytics, who we share it with, how long we keep it, and how to use your rights.