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What is Tessl?

Tessl presents a cutting-edge AI-driven development platform that creates secure, high-quality code automatically tailored to your unique requirements. This revolutionary method for specification-focused development is built on rigorous, deterministic conformance testing, enabling users to define their needs while the AI generates the appropriate code. Tessl introduces a groundbreaking approach to software development, with artificial intelligence intricately woven into its foundation. The software produced through Tessl is constructed from small, modular components that work together to form complex systems. It is designed to integrate smoothly with current large language models and is flexible enough to adapt to future advancements in artificial intelligence technology. Inherent quality assurance is integrated into the Tessl platform through spec conformance testing and detailed code quality evaluations. This platform not only encourages pushing the boundaries of generative AI within an innovative, experimental environment but also allows users to explore various workflows, models, prompts, and more, fostering a collaborative experience centered around specifications. Additionally, Tessl’s high-quality, automatically generated documentation significantly simplifies the understanding and application of the code, enhancing accessibility. By streamlining the development process, Tessl paves the way for enhanced collaboration and innovation in the realm of software engineering, ultimately transforming how developers interact with technology. This forward-thinking platform signifies a pivotal shift in the software development landscape, promising to reshape the future of coding as we know it.

What is Charlie?

Charlie Labs introduces Charlie, an AI-powered engineering assistant that accelerates the software development process for teams by automating a range of tasks, including coding, reviewing pull requests, fixing bugs, and implementing new features, all while integrating smoothly into existing workflows. This cutting-edge tool seamlessly connects with well-known developer platforms such as GitHub, Slack, Linear, Sentry, and Vercel, operating within daily routines to monitor activities like pull requests and team mentions, while automatically generating high-quality TypeScript code, managing branches, and creating pull requests with organized commits and passing tests. By effectively pinpointing bugs, providing actionable inline feedback, and generating feature code based on issue descriptions, Charlie allows engineers to focus on strategic planning and design instead of tedious implementation tasks. In addition, the assistant can interpret natural language requests made in team communication channels, further streamlining the development process. As a result, Charlie not only boosts productivity but also enables teams to innovate and produce superior software more rapidly. Ultimately, this transformative tool redefines how engineering teams collaborate and evolve in their software development journey.

Media

Media

Integrations Supported

Claude Haiku 3
Claude Opus 3
Claude Opus 4.5
Claude Opus 4.6
Claude Sonnet 3.5
Claude Sonnet 3.7
GPT-4o
GPT-5.2 Pro
GPT-5.4
Gemini 2.0
Gemini 2.0 Flash
Gemini 3 Pro
Gemini 3.1 Pro
Gemini Nano
HTML
Linear
Microsoft Excel
Primo
Slack
TypeScript

Integrations Supported

Claude Haiku 3
Claude Opus 3
Claude Opus 4.5
Claude Opus 4.6
Claude Sonnet 3.5
Claude Sonnet 3.7
GPT-4o
GPT-5.2 Pro
GPT-5.4
Gemini 2.0
Gemini 2.0 Flash
Gemini 3 Pro
Gemini 3.1 Pro
Gemini Nano
HTML
Linear
Microsoft Excel
Primo
Slack
TypeScript

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

$500 per month
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Tessl

Date Founded

2024

Company Location

United Kingdom

Company Website

www.tessl.io

Company Facts

Organization Name

Charlie Labs

Company Location

United States

Company Website

www.charlielabs.ai/

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