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FastAPI SaaS templates with async + Pydantic v2. Each marketplace solution generates as a buildable FastAPI project with the entities, workflows, and integrations specific to its vertical — not a generic auth + Stripe scaffold. FastAPI is the async-first Python option. Generated apps use Pydantic v2 DTOs, SQLAlchemy async sessions, dependency-injection auth, and Uvicorn + gunicorn. The auto-generated OpenAPI schema doubles as live API documentation at /docs.
Generated as idiomatic FastAPI: Async SQLAlchemy with asyncpg for high-throughput APIs · Pydantic v2 DTOs with field validators and serializers · DI-based auth guards (Depends(get_current_user)) · Alembic migrations with async-safe templates. Plus the rest of the Python ecosystem patterns Archiet ships per stack.
Pick a vertical. The same architectural genome regenerates the solution into your stack — full domain logic, not a placeholder scaffold.
CRM SaaS for FastAPI
Contacts, opportunities, pipeline
Help Desk for FastAPI
Tickets, SLA, knowledge base
Recruiter ATS for FastAPI
Candidates, hiring pipeline, scorecards
HR Onboarding for FastAPI
New-hire workflow, e-signature
Performance Review for FastAPI
Cycles, goals, 360 feedback
Contract Lifecycle (CLM) for FastAPI
Contracts, renewals, signatures
Customer Feedback for FastAPI
VoC, NPS, feature voting
Project Management for FastAPI
Tasks, sprints, time, resources
IT Asset Catalogue for FastAPI
Applications, lifecycle, drift
Invoicing SaaS for FastAPI
Customers, invoices, multi-currency
FastAPI starters typically ship a single generic scaffold — auth, Stripe, mailer, admin, deploy config. The Archiet marketplace ships vertical solutions — the entities + workflows + integrations specific to a domain are already in the box. Pick a CRM and the contact + opportunity + activity entities, the pipeline-stage workflow, the email integration, and the CSV import are all generated. Pick an ATS and the candidate + scorecard + interview-stage entities, the hiring pipeline, the calendar integration, and the offer-letter generation are all generated.
That changes the math. With a generic scaffold, you optimize for "how fast can I rebuild the same scaffold pieces every project." With a vertical solution, you optimize for "how fast can I customize the domain to this customer's specifics" — the part that's actually billable, defensible, and compounding.
Stack choice is yours. The same genome regenerates into Flask, FastAPI, Django, NestJS, Laravel, Go, Java, Rails, .NET, Tauri+Rust, SAP CAP, Dynamics 365, or LangChain / LangGraph. Pick whichever your team already runs, or whichever your enterprise client mandates. Pick FastAPI when throughput matters, your team is comfortable with async, or you want automatic OpenAPI documentation without writing a line of schema.