phoenix alternatives
Arize-ai/phoenix is a Claude subagent with 11.4k stars and a 90/100 Trust Score. It is a solid option, but not the only one: these are the 8 strongest picks in the same category, compared by Trust Score, maintenance and community.
- 1langchain-ai/langchain146.1k
The agent engineering platform.
Higher Trust Score (100 vs 90) and verified tier.Install - 2
Extracted system prompts from Anthropic - Claude Fable 5.1, Opus 5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro, Antigravity. xAI - Grok, Grok Bot, Cursor, Kimi and more! Updated regularly.
Higher Trust Score (100 vs 90) and verified tier.Install - 3simstudioai/sim29.6k
Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.
Higher Trust Score (100 vs 90) and verified tier.Install - 4
An Open-Source Asynchronous Coding Agent
Higher Trust Score (100 vs 90) and verified tier.Install - 5
Never stop coding. Free MIT AI gateway: one endpoint, 352 providers (150+ free), 1200+ models Kimi, Claude, GPT, Gemini, GLM, DeepSeek, MiniMax. Works with Claude Code, Codex, Cursor, OpenCode, Cline & Copilot. Quota-aware auto-fallback, RTK+Caveman compression saves 15-95% tokens, MCP/A2A, Desktop/PWA. Built by 550+ contributors
Higher Trust Score (100 vs 90) and verified tier.Install - 6
OpenTelemetry Instrumentation for AI Observability
Higher Trust Score (100 vs 90) and verified tier.Install - 7
Persistent Context Across Sessions for Every Agent – Captures everything your agent does during sessions, compresses it with AI, and injects relevant context back into future sessions. Works with Claude Code, OpenClaw, Codex, Gemini, Hermes, Copilot, OpenCode + More
Higher Trust Score (100 vs 90) and verified tier.Install - 8wshobson/agents39.6k
Multi-harness agentic plugin marketplace for Claude Code, Codex, Cursor, OpenCode, GitHub Copilot, and Google Antigravity
Higher Trust Score (100 vs 90) and verified tier.Install
Comparison generated from directory data (Trust Score, stars, activity), refreshed daily. phoenix last activity: today.