Cardboard: Agentic video editor

Agentic video editor

Cardboard is an agentic video editor for growth/marketing teams and serious creators who need to ship videos consistently. Instead of agencies, long timelines, and infinite review cycles, teams give cardboard a footage + a goal (“3 variants”, “30s hook”, “testimonials”) to get a strong first cut in minutes on which they can iterate quickly. Multimodal LLMs can finally reason over footage, and WebGPU/WebCodecs make a real NLE possible in the browser. For the first time, an “AI director” inside a professional editor can be a reality. We have to build two hard things at once: a high-performance editor in the browser and an agentic editor that is reliable for production use cases. Most startups do one; incumbents can’t rebuild their stack without breaking everything. Saksham and Ishan met in school and have known each other since 15 years. Saksham was Co-founder/CTO of Iterate AI (backed by EF) and posts content on social media; Ishan has spent ~5yr building memory-heavy, performance-critical browser apps at HackerRank (S11) and deeply understands browsers. He has built Hotspoter (5M+ downloads) when he was 14. Together, we’re unusually suited to build the editor core others avoid. Video is becoming the default distribution channel, and the team that iterates fastest compounds attention. Cardboard becomes the default workspace for video production, the way Canva/Figma became the workspace for design - because it’s collaborative, fast, and does the tedious parts for you.

Active Founders

Saksham Aggarwal

Founder

Saksham Aggarwal is the founder of Cardboard (W26). He studied CS at BITS Pilani and previously built AI products at Iterate AI (EF-backed startup). He has published at ACL and has spoken internationally on AI evaluations. He was the first engineer at PYOR (backed by Coinbase and Castle Island) and worked in growth at Sequoia-backed Flint.

Saksham Aggarwal

Founder

Saksham Aggarwal is the founder of Cardboard (W26). He studied CS at BITS Pilani and previously built AI products at Iterate AI (EF-backed startup). He has published at ACL and has spoken internationally on AI evaluations. He was the first engineer at PYOR (backed by Coinbase and Castle Island) and worked in growth at Sequoia-backed Flint.

Ishan Sharma

Founder

Ishan Sharma is the founder of Cardboard (W26). He is a full-stack engineer with deep experience in high-performance web systems, creative tooling, and applied AI. Previously, he spent ~4.5 years at HackerRank (S11), where he led multiple 0→1 products used by millions. He started programming in 6th grade and built a Windows app in school that crossed 5.7M+ downloads and was featured on CNET and Softonic

Ishan Sharma

Founder

Ishan Sharma is the founder of Cardboard (W26). He is a full-stack engineer with deep experience in high-performance web systems, creative tooling, and applied AI. Previously, he spent ~4.5 years at HackerRank (S11), where he led multiple 0→1 products used by millions. He started programming in 6th grade and built a Windows app in school that crossed 5.7M+ downloads and was featured on CNET and Softonic

Company Launches

Cardboard - Agentic Video Editor

See original launch post

TL;DR

Cardboard is an agentic video editor. It gives you the power of Premiere Pro or DaVinci Resolve without the learning curve. It is orders of magnitude faster + cheaper than the old way of making videos.

It lives in your browser and helps you go from a sea of raw footage (talking heads, screen recordings, screenshots, B-rolls) to a great video in seconds.

Think of it as “vibe editing”

https://youtu.be/xLBxatFM7uk

The Problem

Video has become the default distribution channel for growth, marketing, and brand storytelling. The teams who iterate fastest on video, compound attention over time.

Many of us sit on mountains of raw assets - product walkthroughs, customer feedback, tweets, blogs, changelogs, emails, and newsletters - that should turn into testimonials, launch videos, recaps, and ad experiments.

But, editing is painfully slow. Getting to a first cut still means hours of manual work, expensive tools, and async feedback loops. This is where the momentum dies.

As a result, most teams ship far fewer videos than they should - not because they lack ideas or footage, but because the editing process can’t keep up.

The Solution

We are building Cardboard - it is an agentic video editor that lives in your browser.

You can:

Ask for a first cut (“make a 60s recap” / “cut this into ads”)
Search footage by meaning, not filenames
Then refine it yourself on a timeline

The goal is to make video production feel closer to modern design / coding tools - fast, accessible, and collaborative - so the teams can iterate fast and ship more.

Why us?

We met in middle school and have been best friends since the last 15yrs. We built Cardboard because we lived with this problem ourselves:

I create content on Instagram and LinkedIn, with ~250k views/month on an average.
Ishan (CTO) has been producing Apple-style internal launch videos for HackerRank’s all-hands demo days (350+ attendees) [Example: Video 1, Video 2]

Both of us hit the same wall: tools like Premiere Pro or DaVinci are powerful, but the learning curve is steep and getting to a first cut takes hours. Creativity starts to feel like manual work.

Cardboard exists to remove those painful steps - so that people can focus on what they’re actually good at: telling great stories.

Ask

If you’re leading or working in a growth / marketing team that uses video as a distribution channel (launches, ads, recaps, testimonials, or weekly content) and you care about speed, we’d love to work closely with you.

Start using Cardboard!

- @Saksham Aggarwal and @Ishan Sharma (Cardboard, W26)