Stagehand

StagehandSince 2026-02

Stagehand is an AI-native browser automation SDK for TypeScript and Node.js created by Browserbase. It provides simple, high-level primitives (act, extract, and observe) that turn fragile CSS/XPath selectors into resilient natural language actions powered by frontier LLMs. By integrating directly with Playwright, Stagehand allows developers to mix standard deterministic browser code with dynamic AI-driven actions, creating test suites and automation scripts that never break when CSS classes or DOM hierarchies change.

Stagehand uses hierarchical DOM filtering to send compact accessibility trees to LLMs, keeping latency low and execution deterministic. Its extract method parses unstructured page contents directly into Zod schemas, while act executes complex multi-step user actions like selecting dates in dynamic calendar pickers. Stagehand can run locally on standard Playwright instances or scale horizontally across Browserbase's managed browser cloud with anti-bot bypass and session recording.

LiveKit AgentsSince 2026-08

LiveKit Agents is an open-source real-time communication framework engineered to build conversational voice, video, and multimodal AI agents with sub-500ms latency. Leveraging WebRTC, it connects speech-to-text (Deepgram, Whisper), LLMs (OpenAI, Anthropic), and text-to-speech (Cartesia, ElevenLabs) in a tightly synchronized bidirectional stream. From customer service avatars to interactive language tutors and hands-free coding copilots, LiveKit Agents provides the enterprise infrastructure for real-time human-AI interaction.

Building real-time voice agents requires solving audio interruption, packet jitter, and latency stacking. LiveKit Agents abstracts these challenges with native Voice Activity Detection (VAD), turn-taking management, and edge-routed audio pipelines. Available in Python and Node.js with client SDKs across React, iOS, Android, and Flutter, LiveKit enables developers to self-host their agent backend or deploy onto LiveKit Cloud.