20 SkillOpt alternatives
SkillOpt: Microsoft's open-source optimizer that trains an agent's SKILL.md like a model parameter — epochs, learning-rate budgets and a held-out validation gate, with frozen weights. 20 apps do similar work, most sharing Developers, Open Source and Evaluation, ranked by how much they have in common with SkillOpt.
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Lenz IO
Audit-grade fact-checking API for AI products — eight models across five stages, adversarial debate, and a full citation trail behind every verdict.
Also: Developers, Evaluation, Research
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The framework and observability platform most teams use to build, debug, and ship LLM agents.
Also: Developers, Evaluation, Open Source
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Open-source LLM observability — trace, evaluate, and improve AI applications with production data.
Also: Developers, Evaluation, Open Source
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LangGenius
An open-source platform for building production LLM applications — visual workflows, RAG, and agents in one place.
Also: Developers, Evaluation, Open Source
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Open-source testing and evals platform for MCP servers — trace tool calls, debug OAuth, and catch cross-client regressions in CI.
Also: Evaluation, Open Source
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Arize AI
AI engineering platform for tracing, evaluating and improving LLM apps and agents — with Phoenix, its open-source local-first counterpart, for teams that want to start without a vendor.
Also: Evaluation, Open Source
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Run agent evals and private benchmarks in sandboxed cloud environments — compare Claude Code, Codex, Cursor and Copilot on the same real tasks.
Also: Developers, Evaluation
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Tatva Labs Inc.
Continuous automated QA for voice and chat AI agents, from pre-launch simulation to live call monitoring.
Also: Developers, Evaluation
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Prefactor Pty Ltd
Agent observability and evaluation that scores every production run for quality, drift and risk — and can pause or block a risky action before it executes.
Also: Developers, Evaluation
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Evaluation-first AI development — measure whether a prompt or model change actually improved anything.
Also: Developers, Evaluation
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The open-source AI hub: over a million models, hundreds of thousands of datasets, and hosted demo Spaces.
Also: Developers, Open Source
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An open-source coding agent for VS Code and JetBrains that plans before it edits and asks before it acts.
Also: Developers, Open Source
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Agentic AI Foundation
Open-source AI agent from the Agentic AI Foundation — a native desktop app, CLI and API that runs tasks locally with 70+ MCP extensions.
Also: Developers, Open Source
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All Hands AI
OpenHands — the leading open-source coding agent platform, self-hostable or run in the cloud.
Also: Developers, Open Source
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Free, open-source local MCP gateway: register each server once, share it with every AI client, and cut tool-definition tokens by up to 91%.
Also: Developers, Open Source
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Mario Zechner
Minimal, MIT-licensed terminal coding agent that adapts to your workflow via TypeScript extensions.
Also: Developers, Open Source
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Vercel Labs
Vercel Labs' tiny open-source coding agent: a ~6MB Zig binary that cold-starts in microseconds and embeds anywhere.
Also: Developers, Open Source
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Prompt One, Inc.
Open-source CLI framework that gives AI agents one command grammar across Salesforce, ServiceNow, DocuSign and Google Workspace, loading each schema only when asked.
Also: Developers, Open Source
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Native, open-source Mac database client for 29 engines, with a Claude-powered SQL assistant and its own MCP server.
Also: Developers, Open Source
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Aisle Technologies, Inc.
An open-source layer that lets your customers describe a feature and get a working micro-app inside your product — sandboxed to their own permissions.
Also: Developers, Open Source