{
  "slug": "symbolic-software",
  "name": "Symbolic Software",
  "url": "https://symbolic.software",
  "hq": "Paris, France",
  "focus": "Protocol-level verification (Verifpal) and cryptographic audits; author of the 2026 Verification Theatre paper",
  "summary": "Symbolic Software, led by Nadim Kobeissi, builds Verifpal and performs protocol-level formal analysis and cryptographic audits. Its February 2026 Verification Theatre paper found 13 vulnerabilities in Cryspen's libcrux and hpke-rs, including four inside formally verified code, and is the reference on reading a verification boundary.",
  "why_first": "",
  "services": [
    "Symbolic protocol modelling and analysis",
    "Cryptographic implementation audits",
    "Verification-boundary reviews of verified code"
  ],
  "tools": [
    "verifpal",
    "tamarin",
    "proverif"
  ],
  "evidence": [
    [
      "Verification Theatre (ePrint 2026/192)",
      "https://eprint.iacr.org/2026/192"
    ],
    [
      "Verifpal",
      "https://verifpal.com"
    ]
  ],
  "fit": [
    "Choose Symbolic Software to analyse the protocol around your cryptography and to audit what a verification claim leaves out."
  ],
  "rank": 11,
  "page": "https://sorryfree.com/firms/symbolic-software/",
  "updated": "2026-09-13"
}