Built by a security engineer, for security engineers.
InterceptSuite was born out of a real problem that went unsolved for years.
A gap that HTTP proxies couldn't fill.
For years, security engineers testing desktop applications on Windows, macOS and Linux ran into the same wall. Burp Suite and similar transactional proxy tools are built for HTTP. But a huge class of real-world apps don't use HTTP at all - they speak raw TCP, UDP, custom binary protocols or proprietary handshakes.
Other MITM proxies existed, but they were slow (pure Python), CLI-only with no proper GUI, and lacked the low-level network control deep protocol inspection demands. None handled TLS upgrade: the technique countless applications use to start a plain TCP session and upgrade it to TLS mid-connection. SMTP with STARTTLS, proprietary app handshakes, database connections - all invisible to existing tools.
Every engagement meant stitching together workarounds, writing one-off scripts, and hitting the same limitations over and over again.
HTTP-only proxies
Great for web. Useless for thick-client TCP and UDP applications.
Slow Python tools
Too slow and too limited for real-world low-level protocol work.
No TLS upgrade support
No tool could intercept TCP sessions that upgrade to TLS mid-connection.
Sourav Kalal
Sourav is a security engineer who spent years testing the full stack - web, mobile and desktop, across Windows, macOS and Linux. The non-HTTP problem was a constant friction point on every desktop application engagement.
In February 2025, he decided to stop working around the gap and build the solution himself.
From idea to cross-platform tool.
Feb / Mar 2025
The decision
After years of facing the same problem on every desktop engagement, Sourav began designing InterceptSuite.
31 May 2025
v1.0.0 - first release
InterceptSuite v1.0.0 shipped on Windows: native performance, a proper GUI, a SOCKS5 proxy gateway and the Python extension API.
Later in 2025
Cross-platform expansion
macOS and Linux support followed, making InterceptSuite a truly cross-platform interception tool.
v2.0 - today
Full feature set, still growing
DTLS MITM, universal TLS upgrade (STARTTLS), PCAP export, project management and more - plus Replay, interception rules, Scope and AI access in 2.0.
The mission
Make InterceptSuite the go-to tool for intercepting TCP, TLS, DTLS and UDP traffic - from security engineers to developers to sysadmins, from desktop applications to IoT devices.
Questions? Reach out at [email protected] or use the contact page.