The Last SaaS

The Last SaaS is an open source headless SaaS backend that lets AI assistants and agents build upon base software primitives.

The Last SaaS is an open source headless application backend designed for AI assistants and agents. It provides base software primitives including records, files, accounts, permissions, notifications, and audit logs. Assistants and agents connect via Model Context Protocol, command line interface, or application programming interface to manage data, handle user invitations, set access rules, and schedule notifications. The service checks saved records against defined schemas and tracks edits and uploads in a central log. It supports Claude and ChatGPT, and users can choose between the free hosted version or self-hosting the application backend.

The Last SaaS at a glance

Best for: Software engineer, Product manager
Runs on: Web, API, CLI, self-hosted, open source
Pricing: Hosted version is free
Released: October 2026
Category: AI agent tool
Website: thelastsaas.com

Key features

Create and validate collections and records
Upload, download, and organize files by path
Invite team members and manage roles
Assign access rules to users and roles
Send immediate or scheduled notifications
Review audit logs of edits, uploads, and changes
Connect via MCP, CLI, and API

Use it for

Manage structured data collections with AI
Organize and retrieve workspace files
Control user access and permissions
Schedule and deliver team notifications
Review audit logs of workspace activity

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