Simple setup · Modular design · Ready to scale

The prompt-extendable SaaS platform

Assistant Cortex is business software that extends itself. Run AI agents, chat, phone, email and a marketplace of ready-made applications — and when you need something that does not exist yet, describe it in plain language and the platform’s own coding agent builds it, tests it and publishes it back into your marketplace.

You never have to hire a developer for custom code.

Real screens: apps the platform built and runs itself.

80+ AI models preconfigured

15 model types supported

MCP native

Builds its own applications

What “prompt-extendable” means

1. Start with a full platform

AI agents, chat, and a marketplace of turnkey applications and abilities that install with a click — phone, email, knowledge bases, image and audio generation, and more.

2. Describe what’s missing

Need an app, ability or integration nobody has built? Write a short brief in plain language — the way you would hand a ticket to a developer.

3. The platform builds it

A coding agent builds your module on an isolated sandbox, tests it against the live platform, and publishes it to your marketplace when you approve it.

Custom software, without the custom-software project

The Coding Sandbox is the feature that makes the platform prompt-extendable. Every build is a project you can watch, stop, modify and publish — the dashboard below shows four real applications a single sandbox built from short written briefs: a notes app, a 3D Rubik’s cube solver, an interactive chat card and a telnet server.

Coding Sandbox dashboard with four completed projects, each built by the AI coding agent from a plain-language instruction
Four working modules, four short prompts, zero developers. See how the Coding Sandbox works →

Everything is already an application — until you need a new one

Install what you need from the marketplace. Every application runs your agents, your permissions and your data.

AI Phone Agents

Agents that answer and place real phone calls, with recordings, transcripts and reasoning traces.

AI Email Agents

Mailboxes your agents read, classify and answer on schedules you control.

AI Knowledge Base

Document stores with retrieval your agents search and cite in their answers.

AI Image Generator

Text-to-image generation and editing with the models you choose to run.

AI Music & Audio Studio

Music generation, text-to-speech and audio tooling in one workspace.

Calendar & Booking

Availability schedules and shareable booking links backed by personal calendars.

AI Sales Pipeline

Lead tracking and agent-assisted outreach from first contact to close.

AI Agent Monitoring

Every agent run recorded — prompts, tools and outcomes you can audit.

Human-in-the-Loop AI

Approval rules that put a person between an agent and actions that matter.

MCP Client & Server

Connect outside tools to your agents, and publish your abilities to any MCP client.

Interactive Chat Cards

Agent answers rendered as live UI — buttons, previews and controls instead of paragraphs.

AI Compliance Controls

Data erasure, retention and audit tooling built into the platform’s core.

Browse the full application marketplace →

Stack Features

Assistant Cortex has something to offer both individual users and enterprises, allowing for fine-tuned control over the user experience and easy extensibility.

AI Agents

Create as many AI agents as you need, giving them access to AI abilities and RAG documents.

Built for Teams

User groups can be granted access to different agents, AI abilities, and applications.

ACL Permissions

Control what each user group can do in each application with fine-tuned ACL controls.

Models API

Access all models from a single API endpoint, including embeddings, text-to-speech, speech recognition, image generation and more.

Extensive Model Support

Assistant Cortex supports 15 different types of AI models with over 80 predefined out of the box — not what you need? Custom models can also be used.

Turnkey Hosting & Services

Prefer it done for you? We offer turnkey hosting and development services to create bespoke applications at a fraction of the cost of traditional agency services.

Built to scale, built around agents

Grows with demand

  • Scale with distributed workers. AI model workers are distributed, so capacity grows with your needs.
  • Turnkey modules. A large catalog of applications and AI abilities installs with a button click.
  • Governed as it grows. Every module runs under your user groups, ACL permissions and usage billing.

Agents at the center

  • Customized in clicks. Give agents tools and documents in a few clicks; they can then answer emails, texts, phone calls and more.
  • Frontier and open models. An agent-centric platform supporting the latest frontier AI models alongside open ones.
  • MCP in both directions. Agents consume outside MCP tools, and your platform publishes its own abilities to any MCP client.

Chat that answers with working software

Assistant Cortex chat is not limited to text. Abilities can render structured JSON through HTML templates and answer with interactive UI components — buttons, previews, progress and controls — inside the conversation.

  • JSON rendering with HTML templates. Structured model output becomes formatted, on-brand answers.
  • Interactive UI components. The dice-roll card shown here is a real chat answer, built by the platform’s own coding agent.
  • Easy install. Card-based abilities install from the marketplace like everything else.
An Assistant Cortex chat conversation where the agent answers a dice-roll request with an interactive UI card
“Roll a 20-sided die” answered with a live card — more on interactive chat cards →

Enterprise Deployment

The Assistant Cortex codebase can be licensed to build fully customized SaaS products under your own brand. You get the complete platform — user management, billing, the AI framework, the application marketplace and the coding tools — as your foundation, so your team ships a polished product in weeks instead of building the hardest parts from scratch. We tailor the licensing, hosting and development support to your project; contact sales to talk through what you want to build.

Live products built on the platform

Both of the products below are live customized SaaS builds running on the Assistant Cortex platform.

FurryDraw.com — AI pet portrait storefront built on Assistant Cortex
FurryDraw.com — a consumer storefront that turns pet photos into framed AI artwork, with rewards, coupons and print fulfillment.
Kruits.com — AI-native recruiting platform built on Assistant Cortex
Kruits.com — an AI-native recruiting platform with applicant tracking, AI phone and video interviews, and email & SMS screening.

Frequently asked questions

What is a prompt-extendable SaaS?

Software you extend by describing what you need instead of hiring someone to code it. In Assistant Cortex, a written brief becomes a working application, AI ability or integration: the platform’s coding agent builds it on an isolated sandbox, tests it, and publishes it to your marketplace when you approve.

Do I really never need a developer?

For custom modules, no — you describe the application or ability and review what the coding agent builds and tests before publishing it. If you would rather have it done for you, turnkey hosting and development services are available at a fraction of traditional agency cost.

Which AI models does it support?

15 different types of AI models — language, embeddings, text-to-speech, speech recognition, image generation and more — with over 80 predefined out of the box, all behind a single API endpoint. Custom models can also be added.

Is it safe to let the platform build its own code?

Builds happen on an isolated sandbox instance with its own domain, database and secret store — never on your production system. The agent tests its work against the live platform, and nothing reaches your marketplace until you press Publish.

How do teams and permissions work?

User groups are granted access to specific agents, AI abilities and applications, and fine-tuned ACL permissions control what each group can do inside every application.

Your next application is a prompt away

Start with a full AI platform today — and never wait on a development backlog again.

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Modules to install

These modules will be installed automatically when your Assistant Cortex instance is provisioned.

Nothing selected yet — browse the marketplace and hit Install on anything you want preloaded.