10 SaaS Ideas You Can Build with Eden Stack (By Industry)

January 29, 2025 · Magnus Rødseth

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10 SaaS Ideas You Can Build with Eden Stack (By Industry)

Eden Stack isn't just a template—it's a foundation for production SaaS applications. But what kinds of applications? Let's break down specific use cases across industries, showing how each component of the stack maps to real business needs.

The Pattern: Full-Stack AI-Powered SaaS

Every modern SaaS shares a common architecture:

ComponentPurposeEden Stack
Web DashboardAdmin panel, analytics, settingsTanStack Start
API LayerServe multiple clients, expose servicesElysia + Eden Treaty
DatabaseStore user data, application stateNeon + Drizzle
Background JobsLong-running tasks, webhooks, AI processingInngest
AuthenticationUser management, OAuth, sessionsBetter Auth
PaymentsSubscriptions, one-time purchasesStripe
ObservabilityError tracking, analyticsSentry + PostHog

Now let's see this pattern applied across industries.


1. Education: AI Lesson Planner

The Product: An AI-powered tool for teachers to generate lesson plans, assessments, and curriculum materials.

How Each Layer Maps

FeatureStack Component
Teacher dashboard to manage classesTanStack Start SSR
REST API for school district integrationsElysia endpoints
Generate lesson plans with GPT-4/ClaudeInngest background jobs
Store curricula, student progressDrizzle + Neon
School admin SSOBetter Auth
Per-teacher or per-school pricingStripe subscriptions

Key Technical Requirements

// Inngest handles long-running AI generation
inngest.createFunction(
  { id: "generate-lesson-plan" },
  { event: "lesson/generate.requested" },
  async ({ event, step }) => {
    const outline = await step.run("create-outline", () =>
      generateOutlineWithAI(event.data.topic)
    );
    
    const materials = await step.run("generate-materials", () =>
      generateMaterialsWithAI(outline)
    );
    
    await step.run("notify-teacher", () =>
      sendEmail({ to: event.data.teacherEmail, lessonPlan: materials })
    );
  }
);

Why Eden Stack: Teachers can't wait 30 seconds staring at a spinner. Inngest processes AI generation in the background and emails the completed plan.


2. Fitness: Personal Training Platform

The Product: AI workout generator with progress tracking, available on web and mobile.

How Each Layer Maps

FeatureStack Component
Workout calendar and progress chartsTanStack Start
Sync workouts across devicesElysia API
AI-generated custom workout plansInngest + AI APIs
Exercise library, user historyDrizzle relations
Social login for quick onboardingBetter Auth (GitHub, Google)
Monthly subscription tiersStripe recurring

Key Technical Requirements

// Type-safe API with Eden Treaty — same code works on web AND mobile
const { data } = await api.workouts.generate.post({
  fitnessLevel: "intermediate",
  equipment: ["dumbbells", "pull-up-bar"],
  duration: 45,
  focus: "upper-body"
});
// data is fully typed: { workout: Workout, estimatedCalories: number }

Built-in Cross-Platform Parity

Fitness apps need both web (for detailed planning) and mobile (for gym use). Eden Stack includes a cross-platform sync hook that automatically detects web changes and prompts you to implement mobile equivalents:

╔══════════════════════════════════════════════════════════════════╗
║  📱 CROSS-PLATFORM SYNC: Mobile Implementation Required          ║
╚══════════════════════════════════════════════════════════════════╝
 
Web route modified: src/routes/_authenticated/workouts.tsx
Route: /workouts
 
⚠️  ACTION REQUIRED: Update your todo list with these mobile tasks:
 
  1. Create/update `apps/mobile/src/screens/WorkoutsScreen.tsx`
  2. Wire up navigation to WorkoutsScreen
  3. Ensure API calls use same Eden Treaty client pattern
  4. Match form validation logic from web implementation

The hook (.claude/hooks/cross-platform-sync.py) fires whenever you modify a web route, ensuring you never ship a web feature without considering mobile. Combined with the ui-patterns skill that covers React Native patterns, you get consistent UX across platforms.

Why Eden Stack: Full type safety from database schema to mobile app. Change a field in Drizzle, get compile errors everywhere it's used. The cross-platform hook ensures feature parity without manual tracking.


3. PropTech: Property Management Dashboard

The Product: Landlord portal for managing properties, tenants, maintenance, and rent collection.

How Each Layer Maps

FeatureStack Component
Property portfolio overviewTanStack Start with SSR
Tenant portal APIElysia routes
Rent reminders, lease renewal workflowsInngest cron + events
Properties, tenants, payments, maintenanceDrizzle schema
Landlord + tenant authenticationBetter Auth multi-tenant
Rent payments, subscription for landlordsStripe Connect

Key Technical Requirements

// Elysia cron for automated rent reminders
import { cron } from "@elysiajs/cron";
 
app.use(
  cron({
    name: "rent-reminder",
    pattern: "0 9 1 * *", // 9am on the 1st of each month
    async run() {
      const upcomingRent = await db.query.leases.findMany({
        where: (lease, { lte }) => lte(lease.nextDueDate, addDays(new Date(), 7))
      });
      await Promise.all(upcomingRent.map(lease => 
        inngest.send({ name: "rent/reminder", data: lease })
      ));
    }
  })
);

Why Eden Stack: Multi-tenant architecture with Stripe Connect for marketplace-style payments. Landlords pay SaaS fee, tenants pay rent through the platform.


4. Construction: Project Management Software

The Product: Construction project tracker with document management, progress photos, AI-powered reporting, and subcontractor coordination.

How Each Layer Maps

FeatureStack Component
Project timeline, Gantt chartsTanStack Start
Field worker mobile app APIElysia
Daily report generation, document processingInngest
AI photo analysis & progress detectionInngest + Vision APIs
Projects, phases, workers, documentsDrizzle + Neon
Per-company accounts, role-based accessBetter Auth + custom roles
Per-project or per-seat pricingStripe metered billing

Key Technical Requirements

// Schema for construction-specific data
export const projects = pgTable("projects", {
  id: text("id").primaryKey().$defaultFn(() => crypto.randomUUID()),
  name: text("name").notNull(),
  status: text("status", { enum: ["planning", "active", "on-hold", "completed"] }),
  startDate: timestamp("start_date"),
  estimatedCompletion: timestamp("estimated_completion"),
  actualCompletion: timestamp("actual_completion"),
  budget: integer("budget"),
  companyId: text("company_id").references(() => companies.id),
});
 
export const progressReports = pgTable("progress_reports", {
  id: text("id").primaryKey(),
  projectId: text("project_id").references(() => projects.id),
  reportDate: timestamp("report_date").defaultNow(),
  weatherConditions: text("weather_conditions"),
  workersOnSite: integer("workers_on_site"),
  notes: text("notes"),
  photos: jsonb("photos").$type<string[]>(),
  aiAnalysis: jsonb("ai_analysis").$type<AIProgressAnalysis>(),
});

AI-Powered Progress Reports

Field workers snap photos. AI analyzes them and generates structured reports:

// Inngest processes site photos with AI vision
inngest.createFunction(
  { id: "analyze-site-photos" },
  { event: "construction/photos.uploaded" },
  async ({ event, step }) => {
    const { photos, projectId, reportId } = event.data;
 
    // Analyze each photo for progress indicators
    const analyses = await step.run("analyze-photos", async () => {
      return Promise.all(photos.map(async (photoUrl) => {
        const response = await openai.chat.completions.create({
          model: "gpt-4o",
          messages: [{
            role: "user",
            content: [
              { type: "text", text: "Analyze this construction site photo. Identify: 1) Work completed, 2) Safety concerns, 3) Weather impact, 4) Estimated completion % for visible tasks." },
              { type: "image_url", image_url: { url: photoUrl } }
            ]
          }]
        });
        return response.choices[0].message.content;
      }));
    });
 
    // Generate structured report
    const report = await step.run("generate-report", () =>
      generateStructuredReport(analyses)
    );
 
    // Update database with AI analysis
    await step.run("save-analysis", () =>
      db.update(progressReports)
        .set({ aiAnalysis: report })
        .where(eq(progressReports.id, reportId))
    );
 
    // Alert project manager if safety issues detected
    if (report.safetyIssues.length > 0) {
      await step.run("alert-safety", () =>
        sendSafetyAlert(projectId, report.safetyIssues)
      );
    }
  }
);

Why Eden Stack: Drizzle's type-safe schema handles complex project hierarchies. Inngest processes uploaded photos in the background—workers don't wait. AI analysis runs automatically with built-in retries for API failures.


5. Data Analytics: Business Intelligence Dashboard

The Product: Connect data sources, build dashboards, schedule automated reports.

How Each Layer Maps

FeatureStack Component
Dashboard builder, chart libraryTanStack Start
Data source connectors APIElysia
ETL pipelines, scheduled refreshesInngest workflows
Cached queries, user dashboardsDrizzle + Neon
Team workspaces with SSOBetter Auth
Usage-based pricing (queries/month)Stripe metered

Key Technical Requirements

// Inngest for scheduled data refresh
inngest.createFunction(
  { id: "refresh-dashboard-data" },
  { cron: "0 */6 * * *" }, // Every 6 hours
  async ({ step }) => {
    const dashboards = await step.run("get-active-dashboards", () =>
      db.query.dashboards.findMany({ where: eq(dashboards.autoRefresh, true) })
    );
 
    await Promise.all(
      dashboards.map(dashboard =>
        step.run(`refresh-${dashboard.id}`, () => refreshDashboardData(dashboard))
      )
    );
  }
);

Why Eden Stack: Inngest's durable execution handles flaky data sources with automatic retries. Failed refreshes don't break the entire pipeline.


6. Healthcare: Patient Portal

The Product: Secure patient communication, appointment booking, and health record access.

How Each Layer Maps

FeatureStack Component
Patient dashboardTanStack Start
EHR integration APIElysia with FHIR
Appointment reminders, lab result notificationsInngest
Appointments, messages, documentsDrizzle (encrypted)
Patient + provider authenticationBetter Auth
Per-provider monthly subscriptionStripe

Key Technical Requirements

// Better Auth with role-based access
export const auth = betterAuth({
  database: drizzleAdapter(db),
  plugins: [
    organization({
      roles: ["patient", "nurse", "doctor", "admin"],
      permissions: {
        patient: ["read:own-records", "book:appointments"],
        nurse: ["read:patient-records", "update:vitals"],
        doctor: ["read:patient-records", "write:prescriptions", "write:notes"],
        admin: ["manage:users", "manage:billing"],
      },
    }),
  ],
});

Why Eden Stack: Better Auth's organization plugin handles complex healthcare permission hierarchies. Drizzle's type safety prevents accidental data exposure.


The Product: Law firm case tracker with document management, time tracking, and client portal.

How Each Layer Maps

FeatureStack Component
Case dashboard, calendarTanStack Start
Client portal APIElysia
Document OCR, deadline remindersInngest
Cases, clients, time entries, documentsDrizzle
Attorney + client + staff rolesBetter Auth
Per-attorney seat licensingStripe

Key Technical Requirements

// Time tracking with type-safe schema
export const timeEntries = pgTable("time_entries", {
  id: text("id").primaryKey(),
  caseId: text("case_id").references(() => cases.id),
  attorneyId: text("attorney_id").references(() => users.id),
  description: text("description").notNull(),
  durationMinutes: integer("duration_minutes").notNull(),
  billableRate: integer("billable_rate"), // cents
  billable: boolean("billable").default(true),
  invoiceId: text("invoice_id").references(() => invoices.id),
  createdAt: timestamp("created_at").defaultNow(),
});
 
// Calculate billable amounts type-safely
const unbilledTime = await db
  .select({
    totalMinutes: sql<number>`sum(${timeEntries.durationMinutes})`,
    totalAmount: sql<number>`sum(${timeEntries.durationMinutes} * ${timeEntries.billableRate} / 60)`,
  })
  .from(timeEntries)
  .where(and(
    eq(timeEntries.caseId, caseId),
    isNull(timeEntries.invoiceId)
  ));

Why Eden Stack: Drizzle's SQL builder maintains type safety for complex billing calculations. Inngest ensures court deadline reminders are never missed.


8. HR Tech: Employee Onboarding Platform

The Product: Automate new hire paperwork, training assignments, and equipment provisioning.

How Each Layer Maps

FeatureStack Component
HR admin dashboardTanStack Start
HRIS integrations (Workday, BambooHR)Elysia
Onboarding workflow orchestrationInngest
Employees, tasks, documentsDrizzle
HR + manager + employee rolesBetter Auth
Per-employee pricingStripe

Key Technical Requirements

// Inngest orchestrates multi-step onboarding
inngest.createFunction(
  { id: "employee-onboarding" },
  { event: "employee/hired" },
  async ({ event, step }) => {
    const { employeeId, startDate } = event.data;
 
    await step.run("create-accounts", () => 
      createGoogleWorkspaceAccount(employeeId)
    );
    
    await step.run("assign-training", () =>
      assignRequiredTraining(employeeId)
    );
    
    await step.sleepUntil("wait-for-start", startDate);
    
    await step.run("send-welcome", () =>
      sendWelcomeEmail(employeeId)
    );
    
    await step.sleep("check-in-delay", "7 days");
    
    await step.run("first-week-checkin", () =>
      sendCheckInSurvey(employeeId)
    );
  }
);

Why Eden Stack: Inngest's sleepUntil and sleep enable long-running workflows that span weeks—impossible with traditional job queues.


9. E-commerce: Inventory Management

The Product: Multi-channel inventory sync for Shopify, Amazon, and WooCommerce sellers.

How Each Layer Maps

FeatureStack Component
Inventory dashboardTanStack Start
Marketplace APIsElysia
Sync jobs, low stock alertsInngest
Products, inventory, channelsDrizzle
Multi-store accountsBetter Auth
GMV-based pricingStripe

Key Technical Requirements

// Webhook handling with durable processing
app.post("/webhooks/shopify", async ({ body }) => {
  // Immediately acknowledge webhook
  await inngest.send({
    name: "shopify/order.created",
    data: body,
  });
  return { received: true };
});
 
// Inngest handles the actual processing with retries
inngest.createFunction(
  { id: "sync-shopify-order", retries: 5 },
  { event: "shopify/order.created" },
  async ({ event, step }) => {
    const order = event.data;
    
    await step.run("update-inventory", () =>
      decrementInventory(order.line_items)
    );
    
    await step.run("sync-to-amazon", () =>
      syncInventoryToAmazon(order.line_items)
    );
  }
);

Why Eden Stack: Stripe webhook + Inngest pattern ensures no order is ever lost, even if downstream APIs are temporarily down.


10. Finance: Expense Management

The Product: Receipt scanning, expense categorization, and approval workflows.

How Each Layer Maps

FeatureStack Component
Expense dashboard, reportsTanStack Start
Mobile receipt upload APIElysia
OCR processing, approval workflowsInngest
Expenses, receipts, approvalsDrizzle
Employee + manager + finance rolesBetter Auth
Per-employee pricingStripe

Key Technical Requirements

// Type-safe expense schema with audit trail
export const expenses = pgTable("expenses", {
  id: text("id").primaryKey(),
  userId: text("user_id").references(() => users.id),
  amount: integer("amount").notNull(), // cents
  currency: text("currency").default("USD"),
  category: text("category", { 
    enum: ["travel", "meals", "software", "equipment", "other"] 
  }),
  description: text("description"),
  receiptUrl: text("receipt_url"),
  ocrData: jsonb("ocr_data").$type<OCRResult>(),
  status: text("status", { 
    enum: ["draft", "submitted", "approved", "rejected", "reimbursed"] 
  }).default("draft"),
  submittedAt: timestamp("submitted_at"),
  approvedBy: text("approved_by").references(() => users.id),
  approvedAt: timestamp("approved_at"),
});

Why Eden Stack: PostHog analytics track approval bottlenecks. Sentry catches OCR failures. Full observability stack included.


Choosing Your Industry

Every example above uses the same core pattern:

  1. Web dashboard for admins (TanStack Start)
  2. Type-safe API for integrations (Elysia + Eden Treaty)
  3. Background processing for heavy lifting (Inngest)
  4. Structured data with relations (Drizzle + Neon)
  5. Authentication with roles (Better Auth)
  6. Payments with flexibility (Stripe)
  7. Observability for production (Sentry + PostHog)

The stack doesn't change. The schema and business logic do.

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