Scrimba Explain vs Chasca: narrated slides or a whiteboard video

Scrimba Explain turns a question into a narrated slide lesson that builds while you watch, and you can ask for one in the middle of a ChatGPT conversation. Chasca turns a prompt, a document or a recording into a narrated whiteboard video, drawn stroke by stroke, that you can download as an MP4 on every plan. Choose Scrimba Explain for quick lessons inside ChatGPT and, above all, for explaining code. Choose Chasca when the video goes out to a class, a course or a channel: in your own voice, in 79 languages, up to 30 minutes long and with your logo.

We make Chasca, so read this with that in mind. Every claim about Scrimba Explain links to Scrimba’s own documentation, which we checked on 3 November 2026. Explain is changing fast, so check its pages again before you choose.

What is Scrimba Explain?

Scrimba Explain makes what it calls explainers. According to Scrimba’s docs:

• What you get: a sequence of slides with spoken narration, built for you and rendered live while you watch. The slides hold typed content: code the narration points into, diffs, diagrams, animations, images, formulas in math notation and quizzes.
• Where you ask for one: on scrimba.com/explain, in ChatGPT and Codex with the @Explain Video Generator plugin, from Claude Code and other MCP tools, on GitHub pull requests, or with a Chrome extension.
• In ChatGPT: the model you’re chatting with writes the lesson and the narration, and the explainer opens on scrimba.com. It’s square unless you ask for another shape, and unlisted, so anyone with the link can watch it; you claim it to keep it in your Scrimba account.
• Languages: narration in 33 languages; in any other, the slides follow your language and the voice falls back to English.
• Limits: one explainer without an account, five with a free account for the life of the account, and 100 a month on Pro. Explainers a connected tool makes count only once you claim them.
• Download: an MP4 with a VTT subtitles file, on Pro.

How do Scrimba Explain and Chasca compare?

	Scrimba Explain	Chasca
What it makes	Narrated slides with code, diagrams, formulas, animations, images and quizzes, played in Scrimba’s player	A narrated whiteboard video: drawings, words and diagrams drawn stroke by stroke as the narrator speaks
Where you make it	scrimba.com, a ChatGPT and Codex plugin, coding agents, GitHub and a Chrome extension	The Chasca web app, Claude and other MCP clients, ChatGPT Business and Enterprise workspaces, and the API from Plus
What it starts from	A question, files you attach, or your ChatGPT conversation	A prompt, your own script word for word, a PDF, Word file or slide deck, a photo, a link, or a recording
The voice	Picked by Explain for the language, or by the teaching style you choose on scrimba.com	30 narrators, a custom voice of your own, or your recording
Narration languages	33	79
Length	Not published	30 seconds to 30 minutes, told in chapters past six minutes
Download	MP4 and VTT subtitles, on Pro	MP4 with SRT and VTT subtitles, on every plan
Changing it	Type what should change: slides rewritten, added, deleted or reordered (three edits per explainer on a free account)	One change at a time: subtitles, style, music or logo for free; a new voice or format makes a new video
Free to try	One explainer without an account, five with a free account, with the Explain logo in the corner	Two videos up to 1 minute each, watermarked
Paid	Pro: 100 explainers a month; the upgrade dialog shows the price	$9.99 to $499.99 a month, billed monthly

Scrimba Explain’s figures come from its plans page, export guide and editing guide; Chasca’s from our pricing page.

Where is Scrimba Explain the better choice?

• You’re already in ChatGPT. Install the plugin once and ask for a lesson mid-conversation, about the topic you’re discussing: the model that worked it out with you writes it. Chasca connects to ChatGPT only in Business and Enterprise workspaces, as a custom MCP server (MCP setup).
• Code. Explain started with code. Its slides show your real code with the narration pointing into it, and diffs, and Claude Code, Codex or a GitHub Action can turn a branch or a pull request into a walkthrough. Chasca can write a code excerpt line by line, but it isn’t built for walking through a codebase.
• Lessons viewers take part in. A quiz answered right on the slide, Go deeper to turn a question into a new explainer, playlists for a whole curriculum, and a player you can embed on your own site.
• Edits in plain words. Type what should change, and Explain rewrites, adds, deletes or reorders slides: three edits per explainer on a free account, unlimited on Pro. In Chasca, a different script makes a new video.

Where is Chasca the better choice?

• A video to publish, on every plan. Download an MP4 with SRT and VTT subtitles, even on the free plan, in landscape, vertical or square. In Explain, downloads come with Pro.
• Your own voice and your own words. Narrate in a custom voice made from about a minute of reading, on every plan (custom voices), or attach a recording and tick Use as the narration (your voiceover). Paste a script and it’s spoken word for word (your own script). Explain writes the lesson from your question and files, and picks the voice.
• The whiteboard look. Every drawing appears stroke by stroke as the narrator names it, in six drawing styles, with a drawing hand if you want one (drawing hand).
• More languages, and math right to left. Chasca narrates in 79 languages. Its diagrams are computed exactly, and in Arabic, equations in Arabic-Indic digits are written right to left (Arabic math lessons).
• Long lessons with your brand. Up to 30 minutes on paid plans, told in chapters; from Pro, your logo, colors, font and a credit line on every scene (branding).

Which should you choose?

If you…	Choose
Want a quick lesson in the middle of a ChatGPT conversation	Scrimba Explain
Need to explain code, a pull request or a codebase	Scrimba Explain
Want viewers to answer quizzes and ask follow-up questions	Scrimba Explain
Publish videos to a class, a course or a channel	Chasca
Want narration in your own voice, or your script word for word	Chasca
Teach in a language beyond Explain’s 33, or teach math in Arabic	Chasca

Can you use both?

Yes. Work a topic out in ChatGPT, watch a quick Explain lesson on it, then ask ChatGPT for a narration script and paste it on Chasca’s Create page. The script is spoken word for word, scene by scene, and drawn on a whiteboard in the voice you pick (your own script).

Sources

• Scrimba Docs. What is Scrimba Explain? Accessed 3 November 2026.
• Scrimba Docs. ChatGPT / Codex. Accessed 3 November 2026.
• Scrimba Docs. Plans and pricing. Accessed 3 November 2026.
• Scrimba Docs. Exporting explainers. Accessed 3 November 2026.
• Scrimba Docs. Languages. Accessed 3 November 2026.
• Scrimba Docs. Editing an explainer. Accessed 3 November 2026.
• Scrimba Docs. Use cases, math, quizzes, going deeper, playlists, embedding and player controls. Accessed 3 November 2026.
• Chasca. Pricing, features and MCP setup.