Beta now live. Apply for access today.

Build powerful AI apps using LLM logic

Use AI to dynamically power your app. Flex simplifies the process of using AI-based conditional logic with multi-model support, so you can build better apps, faster.

What is AI Logic?
Write conditional logic in natural language. Build apps that run on LLM reasoning, an AI “brain” that understands user intent in real-time to decide what code to run.
Features
Logic

Write complex AI logic that understands any input

Code less, deliver more. Use AI to take over the heavy-lifting: manually coding conditional logic and API integrations. Build faster using natural language conditions that don’t require pre-defined inputs.

Build

Build, test and deploy AI apps quickly

Build and troubleshoot workflows with speed and ease. Our straightforward dashboard and visual builder makes Flex both powerful for developers and accessible to non-technical people.

Multi-LLM

Mix and match multiple LLMs in a single workflow

Build multi-layered dynamic workflows using different LLMs for each node to optimise for speed, cost and AI capability. Use in-built actions and node templates to quickly wire up any workflow.

Models

Build with the right LLM for the task at hand

Integrate different LLMs, connect to third-party APIs and databases and write bespoke business logic and prompts quickly, scalably and securely.

Pricing

Flex is the AI layer for any app. Build powerful apps, faster.

Get started

Start building with Flex.
Beta access open.

“We built a performant AI app in a few hours using Flex”

Louis Quaintance

CTO, StreaksAI

“We built a performant AI app in a few hours using Flex.”
Profile image

Louis Quaintance

CEO, Reimagine Work

“With Flex, we've been able to speed up our time to ship new features by around 5x”

Thiago Bernardi

Tech Lead, Crowdform

“This is where another quote will go”
Profile image

Luci Gordon

Head of People, Crowdform