Caido
Caido is a modern, open-source web security auditing toolkit — a Burp Suite alternative. Proxy, replayer, automate, and share findings through a fast Rust-based backend and beautiful web UI. Built for security professionals who love good tooling.
- Location
- Montreal, Canada
- Raised
- $3.5M
- Stage
- Seed
- Founded
- 2022
- Category
- Open Source
- Funding
- VC-backed
- Team
- 10-50
Funding figures as of Jul 2025 · not independently verified
Founders of Caido
- Louis Nyffenegger
- François Lajeunesse-Robert
Investors backing Caido
- Felicis Ventures
Frequently asked questions
What does Caido do?
Caido is a modern, open-source web security auditing toolkit — a Burp Suite alternative. Proxy, replayer, automate, and share findings through a fast Rust-based backend and beautiful web UI. Built for security professionals who love good tooling.
Where is Caido based?
Caido is based in Montreal, Canada.
When was Caido founded?
Caido was founded in 2022.
How much has Caido raised?
Caido has raised $3.5M in their Seed round as of Jul 2025.
Who founded Caido?
Caido was founded by Louis Nyffenegger, François Lajeunesse-Robert.
Who has invested in Caido?
Caido is backed by Felicis Ventures.
How Caido would pitch themselves
○ Auto-generated01Target customer
Developers + open-source communities + enterprises wanting an OSS-first tool in this category, with optional commercial support.
02Problem they solve
Caido is a modern, open-source web security auditing toolkit — a Burp Suite alternative. Proxy, replayer, automate, and share findings through a fast Rust-based backend and beautiful web UI. Built for security professio… The category has historically been served by tools that miss the modern workflow this product is built around.
03Key differentiator
Caido differentiates on a lightweight web security auditing toolkit. Backed by Felicis Ventures, $3.5M raised — the company has resources + validation to compound this thesis. Founded by Louis Nyffenegger + team.
04Go-to-market strategy
Early-stage GTM — typically product-led growth (free tier or low-friction onboarding) paired with founder-led sales for the first 100 customers. Heavy content marketing + community presence on Twitter/X, LinkedIn, and category-specific Slack groups.