## The short answer - **Choose ArcLight** to build a show as slides — cameras, screens, titles and Magic Move-style transitions — and run it into Zoom, Teams, Meet, a recording or a second display, with a presenter view and teleprompter. - **Choose OBS Studio** for free, cross-platform streaming with plugins. - **Choose Ecamm** for Mac-native streaming to social platforms with remote guests. - **Choose Streamlabs** for gaming streams with alerts, widgets and monetization. - **Choose Camtasia** when the video is made in the edit, not live. - **Choose Keynote** when it's mostly slides with an occasional camera. ## Feature by feature ✓ built in · — not available · _partial_ see notes · _plugin_ third-party add-on · _?_ not documented publicly as of September 2026. Sources are linked in each section below. | Feature | ArcLight | OBS Studio | Streamlabs | XSplit | Camtasia | Ecamm | Keynote | | --- | --- | --- | --- | --- | --- | --- | --- | | Runs on Mac | ✓ | ✓ | ✓ | — | ✓ | ✓ | ✓ | | Runs on Windows | — | ✓ | ✓ | ✓ | ✓ | — | — | | Price | $49/year · 30-day trial | Free | Free / subscription | Free / subscription / lifetime | Subscription | Subscription | Free | | Slide-style authoring | ✓ | — | — | _partial_ | — | _partial_ | ✓ | | Morph transitions between scenes | ✓ Magic Move | _?_ | _?_ | _?_ | — | _partial_ Live Motion | ✓ | | Live cameras on scenes | ✓ | ✓ | ✓ | ✓ | — | ✓ | ✓ | | Screen and window capture | ✓ | ✓ | ✓ | ✓ | ✓ record | ✓ | _partial_ | | Virtual camera for Zoom / Teams | ✓ | ✓ | ✓ | ✓ | — | ✓ Pro | — | | Presenter view with your script | ✓ | — | — | — | — | — | ✓ | | Teleprompter | ✓ voice-tracked | _plugin_ | _?_ | _partial_ | — | _?_ | _partial_ | | Color grading and LUTs | ✓ with scopes | ✓ LUT | ✓ LUT | _?_ | _?_ | ✓ LUT, Pro | — | | Recording | ✓ program .mov | ✓ | ✓ | ✓ | ✓ | ✓ \+ ISO | ✓ narrated | | Direct RTMP streaming | ✓ YouTube, Twitch, LinkedIn, custom | ✓ | ✓ | ✓ | — | ✓ | — | | Built-in remote guests | — roadmap | _plugin_ | ✓ | _partial_ | — | ✓ Pro | — | | Audio mixer | ✓ mixer + lip sync | ✓ | ✓ | ✓ | ✓ edit | ✓ | — | | AI agents (MCP) | ✓ built-in MCP server one-click setup | _partial_ obs-websocket API, not MCP | _?_ | _?_ | _?_ | _?_ | _partial_ AppleScript | | Browser source | _partial_ HTML graphics in the show | ✓ | ✓ | ✓ | — | _?_ | — | ## ArcLight compared with OBS Studio, Streamlabs, XSplit, Camtasia, Ecamm and Keynote, feature by feature ## ArcLight vs OBS Studio **OBS Studio** is free, open-source broadcast software for Windows, macOS and Linux. It streams directly to every major platform over RTMP, has a built-in virtual camera, Studio Mode, an Apply LUT filter and a large plugin ecosystem. Shows are built from scenes and sources in a mixing-console interface. ### Choose OBS if you need Windows or Linux, rely on plugins, or the price has to be zero. It's the more capable broadcast engine. ### Choose ArcLight if you'd rather build a show like a deck — slides, per-slide transitions, builds — with a presenter view and teleprompter built in, and you mostly go live through Zoom, Teams, Meet or a recording. Sources: [obsproject.com](https://obsproject.com/), [OBS virtual camera guide](https://obsproject.com/kb/virtual-camera-guide), [OBS filters guide](https://obsproject.com/kb/filters-guide). ## ArcLight vs Streamlabs **Streamlabs Desktop** is a streaming app for Windows and macOS built on OBS, aimed at gamers and creators: alerts, widgets, chat tools, monetization, a virtual camera, and Collab Cam for remote guests (one free, more with Ultra). ### Choose Streamlabs if you stream games or IRL content and want alerts, widgets, monetization and guests in one app. ### Choose ArcLight if you present rather than play, and want a Mac-native, deck-first tool with no account or cloud dependency. Sources: [Streamlabs Desktop](https://streamlabs.com/streamlabs-live-streaming-software), [virtual camera](https://support.streamlabs.com/hc/en-us/articles/4413175077403-Streamlabs-Desktop-Now-Supports-Virtual-Camera), [Collab Cam](https://streamlabs.com/collab-cam). ## ArcLight vs XSplit **XSplit Broadcaster** is a mature live-production and streaming app for Windows 10 and later, free with a watermark above 720p, or Premium by subscription or lifetime license. ### Choose XSplit if you're on Windows. ArcLight doesn't run there. ### Choose ArcLight if you're on a Mac. XSplit Broadcaster doesn't run there. Source: [xsplit.com/broadcaster](https://www.xsplit.com/broadcaster). ## ArcLight vs Camtasia **Camtasia** is a screen recorder and timeline video editor for Windows and macOS, sold by subscription. It excels at the edit: cursor effects, captions, annotations and quizzes. ### Choose Camtasia if your video is made in the edit — cutting takes together, cursor highlights, captions, quizzes. ### Choose ArcLight if you'd rather produce the finished show live while you talk, and skip the edit for a talk you've rehearsed. The program recording is the video. Source: [techsmith.com/camtasia](https://www.techsmith.com/camtasia/). ## ArcLight vs Ecamm **Ecamm** (formerly Ecamm Live) is the leading Mac-native live-streaming app: multistreaming to social platforms, browser-link guests, overlays, ISO recording, a virtual camera and LUTs on its Pro plan, and "Live Motion", which animates overlay size and position between scenes. ### Choose Ecamm if you need to bring in remote guests, record ISO tracks or use NDI today. It's ahead of ArcLight on streaming and guests. ### Choose ArcLight if you think in slides: a whole show authored as a deck, a transition on every slide, builds, a presenter view with your script, a voice-tracked teleprompter and guided per-camera color with scopes. Sources: [Ecamm features](https://support.ecamm.com/en/collections/1877711-ecamm-features), [Ecamm version history](https://support.ecamm.com/en/articles/3280020-ecamm-modification-history). ## Where ArcLight falls short today We'd rather you hear it here. ArcLight doesn't yet host remote guests, record ISO tracks, or show NDI sources or live web pages (its web graphics are HTML built into the show, not a browser pointed at a URL), and it runs only on a Mac, not Windows or Linux. Guests, ISO tracks, NDI and live web pages are on our roadmap. And it isn't free: $49 a year, where OBS and Keynote cost nothing. ## Questions What is the best OBS alternative for Mac? It depends on the job. For presenting, teaching and hosting shows, ArcLight turns slides into live video with Magic Move-style transitions, a presenter view and a teleprompter, and outputs to a virtual camera, a recording or a display. For direct streaming to social platforms with remote guests, Ecamm is the most complete Mac-native choice. For a free, cross-platform broadcast engine with plugins, OBS Studio remains the standard. Which of these can an AI agent control? ArcLight has a built-in MCP server, and Help ▸ Set Up AI Agents connects Claude Desktop (a one-click extension), Claude Code or Codex; any other MCP client works too. Agents can build slides, write the script and run the show, and they render the slides they make to check their work. Access is off until you turn it on in Settings ▸ AI, every agent change is one undoable step you can revert from the toolbar, and an agent asks before it turns on or looks at a camera or screen by itself (while the show plays, it can see the program output). Agents can also add graphics from a built-in library (bar and line charts, big numbers, quotes, timelines, comparisons, source cards) and fill them with data, and the teleprompter can step through them as you read. OBS Studio has the obs-websocket remote-control API, which scripts and some third-party tools use, but no built-in MCP server. Keynote can be scripted with AppleScript. We couldn't confirm agent support for Streamlabs, XSplit, Camtasia or Ecamm. How is ArcLight different from OBS Studio? OBS organizes a show as scenes and sources in a mixing-console interface. ArcLight organizes it as slides in a presentation-style editor, with a transition on every slide, builds, a presenter view and a teleprompter. OBS is free and runs on Windows, macOS and Linux; ArcLight is Mac-only. Both stream directly over RTMP. Can ArcLight replace Camtasia? Only if you'd rather produce live than edit afterwards. Camtasia is a recorder and timeline editor; ArcLight produces the finished show while you talk and records the program output. Does ArcLight stream to YouTube or Twitch? Yes. Go Live streams the program over RTMP to YouTube, Twitch, LinkedIn or any custom RTMP server. It also goes live through any app that accepts a camera, such as Zoom, Teams, Meet or Webex. Is ArcLight free like OBS? No — it's free for 30 days, then $49 a year. OBS Studio and Keynote are free; if price decides it, they win. Against Ecamm, Camtasia or Streamlabs Ultra subscriptions, ArcLight costs less than a single year.