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Can I code Loom?

Screen recording with shareable links

MAYBE
Buildability
VerdictMaybe
Difficulty7/10
Hidden complexity8/10
Prototype3–5 hours
Personal replacement2–4 days
Production-ready2–4 weeks
MaintenanceMedium
AI coding suitability6/10
SaaS price$15/mo
DIY running cost$5–20/mo (storage + streaming)
Potential savings~$180/yr, minus storage costs
Verdict reviewed 2026-08-10 · medium confidence

Recording your screen in the browser is surprisingly easy — MediaRecorder does the heavy lifting. The hidden complexity is everything after you hit stop: video storage, transcoding for reliable playback, streaming, and storage bills that grow forever. Viable for personal use if you accept rough edges.

Which features do you actually use?

Most people don't need the whole product. Tick what your version needs and the buildability recalculates for you.

Your version
–/100
–
Need it?FeatureDifficultyNotes
easy getDisplayMedia + MediaRecorder. Works today in every major browser.
easy Upload to object storage, generate a URL, render a player page.
medium Canvas compositing of two streams. Fiddly but well-documented.
hard Raw WebM plays inconsistently across devices. Cloudflare Stream or Mux solves this — for a fee.
hard Loom uploads while you record. DIY usually means wait-after-stop.
medium Whisper API makes this cheap, but it's another moving part.
medium Watch-time tracking needs player instrumentation and a database.

The honest picture

Easy to build
  • Record screen + mic in the browser, no extension
  • Download the file locally — zero backend needed
  • Simple share pages with an HTML5 player
Hard to build
  • Reliable cross-device playback without a transcoding service
  • Storage costs and lifecycle (videos never stop accumulating)
  • Upload-while-recording and instant links
  • Editing, trimming, chapters
What you'd lose vs Loom
  • Instant links the second you stop recording
  • Polished editing, transcripts, and workspace features
  • Loom's CDN and playback reliability

Recommended stack

  • RecordingBrowser MediaRecorder + getDisplayMedia
  • Storage/streamingCloudflare Stream (transcoding + player included)
  • AppAstro/Next.js + one upload endpoint
  • Transcripts (optional)Whisper API

Biggest risks

  • ⚠Storage bills growing monotonically — set lifecycle rules on day one
  • ⚠WebM recordings that won't play on iOS without transcoding
  • ⚠Large uploads failing on flaky connections without resumable upload

Why people still pay for Loom

The link is ready the second you stop recording, it plays on every device, and none of it is your storage bill or your CDN problem. Loom sells the absence of infrastructure — which is exactly the part that's hard to DIY.

Third option: self-host

Don't want to build it or pay for it? Someone may have already open-sourced it.

  • Cap ↗ Open-source Loom alternative; record and share instantly, self-hostable.
  • OBS Studio ↗ Free local recording powerhouse — no share links, full control.

Build prompt

Paste this into Claude Code, Cursor, Bolt, Lovable, or your agent of choice.

Build a personal screen-recording tool. Page /record: buttons to start/stop recording using getDisplayMedia (screen) plus getUserMedia (mic), combined via MediaRecorder into WebM; show a live timer and preview. On stop, offer (a) download locally and (b) upload. Upload goes to Cloudflare Stream via a server endpoint that requests a one-time upload URL (API token stays server-side in env vars). After upload, create a share page at /v/[id] rendering the Cloudflare Stream player, title (editable via env-protected admin), and date. Store video metadata (id, title, created_at) in SQLite. Add an index page listing my recordings, env-var password protected. Handle the case where the user stops screen-share from the browser UI. TypeScript throughout, README with Stream setup steps.