21st

21st

21st.dev
eve

eve

Vercel
+
+

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About

21st is a developer platform that provides the fastest way to add AI agents directly into applications. The platform offers an SDK that allows developers to define, deploy, and run AI agents with minimal infrastructure setup. Developers can integrate agents using popular frameworks such as Next.js, React, TypeScript, Python, and Node.js. 21st includes built-in features like chat interfaces, session history, tool execution, memory, and real-time streaming responses. The platform also manages backend components such as sandboxed execution environments, authentication, rate limits, and observability. With support for Claude Code and Codex runtimes, developers can build agents that interact with tools, files, and APIs securely. By handling infrastructure and deployment automatically, 21st enables teams to launch production-ready AI agents quickly.

About

eve is an open-source framework for building AI agents that you own, designed around a file-system-based structure and production-ready runtime. An instructions.md file is enough to define an agent, while optional building blocks such as model configuration, skills, tools, sandboxes, channels, connections, subagents, schedules, and evals can be added as the agent grows. Tools are created by dropping TypeScript files into the tools directory, and skills are written as Markdown playbooks that load only when relevant. Agents can connect to services such as GitHub, Stripe, and Linear through authenticated connections and can surface through Slack, Discord, Teams, web chat, APIs, cron jobs, CLIs, and custom applications from the same codebase. Specialized subagents can handle delegated work with their own prompts, tools, and sandboxes.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Software developers, startups, and product teams that want a fast and scalable way to build and deploy AI agents inside their applications

Audience

Developers and engineering teams seeking to build, deploy, self-host, and operate production AI agents with tools, subagents, durable workflows, and human oversight

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Supported
Live Online Supported
In Person Not Supported

Company Information

21st.dev
21st.dev/

Company Information

Vercel
Founded: 2015
United States
eve.dev/

Alternatives

Alternatives

eve

eve

Vercel

Categories

AI SDKs Supported
UI Design Supported

Categories

Integrations

Amazon Web Services (AWS) Not Supported
Discord Not Supported
Docker Not Supported
GPT-5.4 Not Supported
GitHub Not Supported
Linear Not Supported
Markdown Not Supported
Microsoft Teams Not Supported
React Supported
Slack Not Supported
Snowflake Not Supported
Stripe Not Supported
Tailwind CSS Supported
TypeScript Not Supported
Vercel Not Supported
shadcn/ui Supported

Integrations

Amazon Web Services (AWS) Supported
Discord Supported
Docker Supported
GPT-5.4 Supported
GitHub Supported
Linear Supported
Markdown Supported
Microsoft Teams Supported
React Not Supported
Slack Supported
Snowflake Supported
Stripe Supported
Tailwind CSS Not Supported
TypeScript Supported
Vercel Supported
shadcn/ui Not Supported
Claim 21st and update features and information
Claim 21st and update features and information
Claim eve and update features and information
Claim eve and update features and information