Core51 is a messenger for business communication - when you do not need emojis, but you do need precision, consistency, and clear agreements.
Core51 is a business messenger for situations where words must mean exactly what they say. It is not built for casual chat - it is built for approvals, decisions, and agreements.
We keep messages consistent over time: you can name chats, organize them, and export conversations when needed. The goal is simple - fewer misunderstandings and less back-and-forth.
Security is built in. Messages are end‑to‑end encrypted, so the server does not need to see the content. Identity is stable: a participant is not just a display name, so you can reliably understand who agreed to what.
If a deal goes wrong, you can produce proof that a third party can review. In practice this means you can move faster day-to-day, and still have a defensible record when a dispute escalates.
A corporate messenger designed for operational work where confidentiality is mandatory and integrity matters: approvals, escalations, incident response, and sensitive internal discussions.
The server is treated as untrusted. Clients encrypt content on device and use key continuity checks to reduce the risk of server-assisted interception.
Core51 uses a stable, human-friendly identifier for account and contact workflows. It is intended for business processes: approvals, HR/legal records, audit trails, and partner onboarding where email alone is not enough.
Audit preparation is easier when identity and message integrity are built-in. Core51 is designed so that exported proof can be checked independently using public keys and signed commitments.
Core51 aims for predictable, boring operations: deterministic message IDs, explicit state transitions, and logs suitable for compliance review (without exposing plaintext on the server).
Core51 is built by a team with deep experience delivering complex, high-technology systems for the aviation and nuclear industries. The team has extensive background in both software development and software testing, including preparation for certification to standards such as DO-178.
We design features (like proof-of-a-deal exports and offline verification) with auditability and repeatability in mind.
Experience in regulated environments shapes our approach to correctness, change control, and clear operational behavior.
