Best Alternatives to Letta

GitLab is a San Francisco-based DevOps platform providing source code management, CI/CD pipelines, security scanning, container registry, and project management in a single applica

Cursor is an AI-first code editor founded in 2022 by a small team of MIT researchers, built as a fork of Visual Studio Code with native large-language-model intelligence woven dire

Claude Code is Anthropic's agentic software engineering tool, launched in February 2025 as a command-line interface that operates directly in developer terminals. Unlike IDE-based

GitHub Copilot is an AI-powered coding assistant developed by GitHub (Microsoft) in partnership with OpenAI, providing real-time code suggestions, function completions, documentati

OpenAI Platform is the developer API platform of OpenAI — providing programmatic access to OpenAI's large language models (GPT-4o, o1, o3, Whisper, DALL-E, Sora) and AI tools throu

Visual Studio Code (VS Code) is a free, open-source code editor — developed and maintained by Microsoft Corporation (NASDAQ: MSFT) and released under the MIT License on GitHub — pr

TestRail is a web-based test case management platform that provides QA teams with a structured environment for writing, organizing, and executing test cases, tracking test run resu

Mux is a video infrastructure company that provides APIs for developers to build streaming video experiences without managing the complex encoding, delivery, and analytics infrastr

Windsurf is an AI-native code editor developed by Codeium, designed to bring agentic AI directly into the software development workflow. Launched in late 2024, Windsurf introduced

Lovable was founded in 2023 and built a full-stack AI application builder that lets non-technical users create production-ready web applications through natural language conversati

Vercel is a cloud platform company that has fundamentally changed how frontend web applications are built, deployed, and scaled. Founded in 2015 by Guillermo Rauch, Vercel created

Svix is a San Francisco-based webhooks infrastructure platform — backed by Y Combinator (W21) with $13 million raised including a $10.4 million Series A in February 2023 led by And

SmartBear is a software quality tooling company headquartered in Somerville, Massachusetts that provides a broad portfolio of products spanning API design and testing, visual testi

Postman is the world's leading API development platform — providing the tools that 30 million+ developers use to design, build, test, document, and monitor APIs throughout the soft

v0 is an AI-powered code generation platform built by Vercel, the cloud infrastructure company founded by Guillermo Rauch. Launched as v0.dev in October 2023 and rebranded to v0.ap