Cap Review: The Open-Source Loom Alternative for Async Screen Recording

For about two years I’ve defaulted to Loom for the thing every remote engineer does ten times a week: recording a thirty-second clip instead of typing three paragraphs in Slack. It works, it’s fast, and the share link lands in someone’s inbox before I’ve finished my coffee. The problem is that every one of those clips lives on a server I don’t control, behind a paywall that keeps creeping upward, and the free tier keeps getting smaller. So when Cap started showing up in my feeds as “the open-source Loom,” I cleared my default and ran it as my primary screen recorder for a couple of weeks on an M2 MacBook Air. This is what I found.

Cap (cap.so) is an open-source, privacy-first screen recorder built around a simple thesis: you should be able to record, share, and store your videos without handing them to a vendor by default. It’s MIT-ish open source with a public repo, ships native desktop apps for macOS and Windows, and — the part that actually matters — lets you point your recordings at your own S3-compatible storage instead of someone else’s cloud. That single design decision is what makes Cap interesting rather than just another also-ran.

Two modes: instant share links versus the local studio

Cap really has two products bolted together, and understanding the split is the key to using it well.

The first mode is instant mode, which is the direct Loom analogue. You hit record, capture your screen (and webcam bubble if you want one), stop, and Cap uploads the clip and hands you a share link almost immediately. The recipient clicks, the video streams in a browser, done. This is the workflow that 80% of async screen recording actually is — quick bug repros, “here’s what I meant” walkthroughs, PR explanations. In my testing the upload-and-link round trip was quick enough that I stopped thinking about it, which is the only real bar for this kind of tool. If there’s friction, you go back to typing.

The second mode is studio mode, where Cap records locally at higher quality and hands you the raw recording to edit before you export or share. This is closer to what Screen Studio does — you’re producing something, not just firing off a clip. Studio mode captures cleaner footage, doesn’t depend on your upload bandwidth at record time, and gives you a basic editor afterward. The two modes serve genuinely different jobs, and Cap is unusual in shipping both under one roof; Loom is overwhelmingly an instant-link tool, while Screen Studio is overwhelmingly a local-studio tool.

What surprised me is how often the choice between modes mapped cleanly onto the kind of message I was sending. A “hey, your branch breaks the build, here’s the stack trace” clip wants instant mode — it’s worthless in an hour, so the only thing that matters is how fast the link reaches the other person. A “here’s how our new auth flow works, watch this before you touch the code” recording wants studio mode, because three people will watch it over the next month and the extra crispness and the ability to re-cut it actually pay off. Once I internalized that split, I stopped second-guessing which button to press, and Cap started feeling less like a Loom clone and more like a tool that had thought about the two distinct jobs it was being asked to do.

The bring-your-own-storage angle is the whole point

Here is where Cap stops being “a free Loom” and becomes something a privacy-conscious team would deliberately choose.

With Loom or Screen Studio’s hosted sharing, your videos live in the vendor’s infrastructure. That’s fine until it isn’t — until legal asks where customer-facing recordings are stored, until a clip contains a credential someone forgot was on screen, until you simply don’t want a third party holding your internal walkthroughs. Cap lets you configure an S3-compatible bucket — real AWS S3, Cloudflare R2, MinIO, Backblaze B2, whatever speaks the protocol — as the destination for your recordings. The share link still works, but the bytes sit in storage you own and control.

For self-hosters there’s also the option of running the Cap web layer yourself, so even the link-serving and (lightweight) metadata stay inside your perimeter. This is the configuration I’d reach for at a security-sensitive shop: desktop app on each machine, recordings flowing into a company R2 bucket, the web component on your own infra. You get Loom-shaped ergonomics with none of the “our internal demos live on someone else’s server” anxiety.

The tradeoff is honest and worth stating plainly: bring-your-own-storage means you do the bringing. Someone has to create the bucket, manage the credentials, set a lifecycle policy so you’re not paying to store thousand clips from 2024 forever, and think about access control on the links. With Loom, all of that is somebody else’s job and it’s bundled into the price. Cap moves that work — and that control — to you. Whether that’s a feature or a chore depends entirely on whether “we own our data” is a sentence anyone at your company says out loud.

Quality, editing, and the rough edges

Recording quality in studio mode was genuinely good — sharp text, smooth cursor, clean webcam compositing. Instant mode is fine for its purpose; it’s a quick clip, not a keynote. On my M2 Air I didn’t hit performance problems that made me notice the machine working hard, and the app stayed out of the way, which is most of what I want from a menu-bar utility. Audio capture was the one place I had to fiddle — getting system audio versus microphone routed the way I wanted took a couple of test recordings, which is a near-universal pain across every screen recorder I’ve used and not a Cap-specific failing. Once configured it stayed configured.

The editor is where you feel that Cap is younger than its rivals. You get the essentials — trim, basic arrangement, the things you need to cut dead air off the front and back of a clip. What you don’t get is Screen Studio’s signature feature: the automatic, buttery zoom-and-pan that follows your cursor and makes a plain screen recording look like a produced product video. That auto-motion editing is the single biggest reason people pay Screen Studio’s premium price, and Cap doesn’t try to match it yet. If your videos live or die on that polish, Cap will feel bare.

The other gaps are the team-software layer. Loom has years of investment in viewer analytics, comment threads, reactions, organized libraries, SSO, and admin controls. Cap’s collaboration and team-management surface is leaner. For a small team or solo developer that’s a non-issue; for a sales org that lives inside Loom’s engagement metrics, those missing pieces are the whole reason they pay.

How Cap stacks up against Loom and Screen Studio

These three tools get lumped together but they’re optimizing for different things. Loom optimizes for frictionless team communication at scale. Screen Studio optimizes for the most beautiful possible output. Cap optimizes for ownership and openness. Match the tool to which of those you actually care about.

On price, the rough shape as of mid-2026 is this: Cap has a genuinely usable free/open path and a low-cost hosted option if you don’t want to run your own storage; Loom’s paid plans land in the roughly $12–15/user/month neighborhood for business tiers with a deliberately limited free tier; Screen Studio is a premium one-app purchase (subscription or license depending on plan) priced for the value of its editing magic. Treat all of those as approximate and check current pages before you buy — pricing on all three has moved over the past year.

The decision rarely comes down to features in isolation. It comes down to a question of values: do you want a vendor to handle everything for a recurring fee (Loom), do you want the prettiest result regardless of where it’s hosted (Screen Studio), or do you want to keep your data and your costs under your own roof (Cap)?

It’s also worth being clear-eyed about lock-in, because that’s the variable Cap quietly changes. With a hosted tool, your library of recordings is a hostage to your subscription — stop paying and the links can go dark, and migrating years of clips elsewhere is rarely a one-click affair. Because Cap can write to storage you own, your archive doesn’t evaporate when you cancel anything; the files are sitting in your bucket regardless of what happens to the app or the company behind it. For a tool you might lean on for years, that durability is a real, if unglamorous, argument — and it’s the kind of thing teams only appreciate after they’ve been burned once by a vendor sunsetting a product they depended on.

Who should use Cap, and who should not

Reach for Cap if you’re a developer or small engineering team that records a lot of async clips and has started to resent Loom’s pricing or its data model. Reach for it especially if “where is this stored” is a real question at your company — the S3-compatible bring-your-own-storage option is a clean answer that the hosted incumbents can’t offer. If you already run R2 or MinIO, wiring Cap into it is low-effort and pays off immediately in control. And reach for it if you simply prefer to back your daily tools with open source you can read, fork, and outlast.

Stick with the paid incumbents if your value is in the layers Cap hasn’t built out yet. If your team runs on Loom’s viewer analytics, comment threads, and shared libraries, switching costs you the workflow those features enable. If your screen recordings are external-facing marketing or sales assets where production polish converts, Screen Studio’s auto-zoom editing is worth the premium and Cap won’t match it today. And if you have zero appetite for managing a storage bucket, the fully-managed convenience of Loom is the entire point of paying.

The honest middle path, and the one I’m actually taking: use Cap as the default for internal, disposable, dev-to-dev clips where ownership matters and polish doesn’t, and keep a paid tool around for the handful of recordings that need to look produced. The two-mode design makes Cap surprisingly good at being your everyday recorder even while a specialist tool handles the showpieces.

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